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In pwm_auto_temp_store(), the parsed user input was missing bounds
checks, allowing values > 0xF to overflow into the adjacent channel's
bits. Furthermore, the value was being incorrectly written to the
pwm_automatic state array instead of pwm_auto_temp.
Fix this by rejecting values > 0xF with -EINVAL, and assigning the
value to the correct array only after a successful I2C write.
Reported-by: sashiko-bot@kernel.org
Closes: https://lore.kernel.org/all/20260727034932.0B7C41F000E9@smtp.kernel.org/#t
Fixes: 6f9703d0be16 ("hwmon: add support for adt7470")
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Link: https://lore.kernel.org/r/20260727-adt7470_fixes-v2-8-598e38a46ba6@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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If the fan data becomes 0 between the FAN_DATA_VALID() check and the
FAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash
due to a race with a concurrent update of the cached fan value.
Fix a TOCTOU issue by reading fan data once.
Reported-by: sashiko-bot@kernel.org
Closes: https://lore.kernel.org/r/20260727034929.E29B71F000E9@smtp.kernel.org/
Fixes: fc958a61ff6d ("hwmon: (adt7470) Convert to devm_hwmon_device_register_with_info API")
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Link: https://lore.kernel.org/r/20260727-adt7470_fixes-v2-7-598e38a46ba6@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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adt7470_pwm_read() currently ignores failures returned by
pwm1_freq_get(). If the register read fails, the negative error code is
returned through *val while the function itself reports success,
potentially exposing a negative PWM frequency through sysfs.
Fix this by using the cached PWM frequency maintained by the driver,
eliminating the register access from the read path.
Apart from the corrected error propagation and using the cached value,
no functional change is intended.
Fixes: ef67959c4253 ("hwmon: (adt7470) Convert to use regmap")
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Link: https://lore.kernel.org/r/20260727-adt7470_fixes-v2-6-598e38a46ba6@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The ADT7470_PWM3_AUTO_MASK and ADT7470_PWM4_AUTO_MASK macros are
currently defined with swapped bit values.
According to Table 22 of the ADT7470 datasheet, the Fan Control Mode
Configuration for register 0x69 follows the exact same bit position
layout as register 0x68:
- 0x68 Bit[7] corresponds to BHVR1 (PWM1) -> 0x80
- 0x68 Bit[6] corresponds to BHVR2 (PWM2) -> 0x40
- 0x69 Bit[7] corresponds to BHVR3 (PWM3) -> 0x80
- 0x69 Bit[6] corresponds to BHVR4 (PWM4) -> 0x40
Consequently, PWM3 should use mask 0x80 and PWM4 should use 0x40.
This typo did not cause any functional bugs because these specific
macros are never referenced in the driver code. Instead, the driver
correctly applies the configuration by relying on the modulo parity of
the channel index (e.g., `channel % 2`) to selectively apply either
ADT7470_PWM1_AUTO_MASK (0x80) or ADT7470_PWM2_AUTO_MASK (0x40).
Since the bit layout is identical between the two configuration
registers, the hardware is currently configured correctly.
Fix the macro definitions to reflect the datasheet accurately and
prevent future bugs or confusion during code review and refactoring.
As this is a purely cosmetic fix with no functional impact, a backport
to stable kernels is not necessary.
Fixes: 6f9703d0be16 ("hwmon: add support for adt7470")
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Link: https://lore.kernel.org/r/20260727-adt7470_fixes-v2-4-598e38a46ba6@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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During the conversion the alarm callback started interpreting the
channel index as an alarm bitmask, resulting in incorrect alarm
reporting. Compute the proper alarm bit instead.
Reported-by: sashiko-bot@kernel.org
Closes: https://lore.kernel.org/r/20260717211224.B9E291F000E9@smtp.kernel.org
Fixes: fc958a61ff6d ("hwmon: (adt7470) Convert to devm_hwmon_device_register_with_info API")
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Link: https://lore.kernel.org/r/20260727-adt7470_fixes-v2-5-598e38a46ba6@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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When userspace configures 'auto_update_interval' to 0 via sysfs, the
background kthread executes schedule_timeout_interruptible(0), which
returns immediately.
If 'num_temp_sensors' is concurrently or previously set to 0, the
msleep_interruptible() delay inside adt7470_read_temperatures() also
becomes 0. This combination forces the background thread into a tight,
unbounded busy-loop, hogging the CPU and flooding the I2C bus with a
continuous stream of transactions.
Fix this vulnerability by raising the lower limit of the clamp_val in
auto_update_interval_store() from 0 to 500 milliseconds. This guarantees
a reasonable minimum sleep window between sensor updates, protecting the
system from intentional or accidental I2C bus denial of service.
Reported-by: sashiko-bot@kernel.org
Closes: https://lore.kernel.org/r/20260716213252.EACA71F000E9@smtp.kernel.org
Fixes: 89fac11cb3e7 ("adt7470: make automatic fan control really work")
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Link: https://lore.kernel.org/r/20260727-adt7470_fixes-v2-3-598e38a46ba6@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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adt7470_temp_write() and adt7470_pwm_write() update the driver's
cached values (temp_min, temp_max, pwm_input, pwm_enable) before issuing
the corresponding regmap_write(), and never check whether the write
succeeded before committing that update. If the I2C transaction fails,
the function correctly propagates the error to the caller, but the cache
silently keeps the new value, which was never actually applied to the
hardware. Subsequent reads then report a value that does not match the
device state.
Reorder both write paths to update the cache only after a successful
regmap_write(), so the cache always reflects what was actually
written to the hardware.
Fixes: ef67959c4253 ("hwmon: (adt7470) Convert to use regmap")
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Link: https://lore.kernel.org/r/20260727-adt7470_fixes-v2-2-598e38a46ba6@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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During adt7470_read_temperatures(), the driver temporarily switches
the PWM channels to manual mode, performs the temperature collection,
and then restores the original configuration registers.
However, if an I2C transaction fails at any point after entering manual
mode, the function aborts and returns immediately. This leaves the
configuration registers un-restored, permanently trapping the fans in
manual mode.
Introduce a recovery path to ensure that the original PWM configuration
registers are always restored, even when intermediate I2C operations
fail.
Reported-by: sashiko-bot@kernel.org
Closes: https://lore.kernel.org/r/20260716213252.EACA71F000E9@smtp.kernel.org
Fixes: ef67959c4253 ("hwmon: (adt7470) Convert to use regmap")
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Link: https://lore.kernel.org/r/20260727-adt7470_fixes-v2-1-598e38a46ba6@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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nv_remove() frees the per-CPU txrx_stats before unregister_netdev().
Until unregister completes, ndo_get_stats64, the NAPI/xmit data path,
and nv_close()/drain may still access txrx_stats, leading to a
use-after-free.
Free the stats only after unregister_netdev().
Fixes: f4b633b911fd ("forcedeth: use per cpu to collect xmit/recv statistics")
Signed-off-by: Chenguang Zhao <zhaochenguang@kylinos.cn>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Link: https://patch.msgid.link/20260723092637.2135095-1-chenguang.zhao@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Include the word 'at' to make the sentence grammatically correct
inside the description for nilfs2 recovery code. This improves
documentation without changing the original meaning.
Signed-off-by: Manoj K M <manojkm24dev@gmail.com>
Acked-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Viacheslav Dubeyko <slava@dubeyko.com>
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Several CI runs failed in the libarena parallel tests with -4 (-EINTR) [1],
which says nothing about what actually went wrong.
Two workers can fail like this:
worker 1: gives up, e.g. the rendezvous times out, sets test_abort and
returns its own error (-ETIMEDOUT)
worker 2: sees test_abort and returns -EINTR
-EINTR only means "someone else already gave up", so it carries no
information. Which of the two gets reported depends on the order
pthread_join() collects them, because
err = err ?: (long)thread_ret;
keeps the first non-zero value and drops the rest. When the -EINTR worker
comes first, the error describing the actual failure is lost.
Skip -EINTR entirely: a worker only returns it once another worker has
already reported the real error, so report and log only the real errors.
It is still unclear whether the timeouts come from CI load or from a
problem in the test itself. Report the error accurately first, so the next
failure can be diagnosed.
[1]:
https://github.com/kernel-patches/bpf/actions/runs/29867905253/job/88764463566
https://github.com/kernel-patches/bpf/actions/runs/29878191901/job/88794845824
Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Link: https://lore.kernel.org/bpf/20260723061347.398591-1-jiayuan.chen@linux.dev
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
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Our v6.18 based Android system is continuely suffering livelock and bad
page stat as shown in[1] which related to broken xarray slot status. By
investigating big folio operations within f2fs, we find below races and
fix it by get the nr_pages before drop the refcount and folio_lock.
f2fs_get_read_data_folio() calls f2fs_folio_put() before
folio_nr_pages() when invalidating a large folio from the page cache.
That unlocks the folio and drops the caller reference, leaving a window
where a concurrent truncate or folio split can shrink the compound folio
or free it before the invalidate range is computed. An undersized range
then leaves split sub-folios in mapping->i_pages, which can later
interact badly with truncate and reclaim (stale xarray entries and bad
page state when folio->mapping no longer matches the mapping being
truncated).
[1]
PID: 2594 TASK: ffffff8169b81580 CPU: 7 COMMAND: "Thread-3"
#0 [ffffffc08ef2b8a0] xas_load at ffffffe52d1f42a4
#1 [ffffffc08ef2b900] find_get_entries at ffffffe52c185798
#2 [ffffffc08ef2bb60] truncate_inode_pages_range at ffffffe52c19e83c
#3 [ffffffc08ef2bbc0] truncate_inode_pages_final at ffffffe52c19ec2c
#4 [ffffffc08ef2bc20] f2fs_evict_inode at ffffffe52c4c8400
#5 [ffffffc08ef2bcc0] evict at ffffffe52c2de9f4
#6 [ffffffc08ef2bd00] iput at ffffffe52c2db1b4
#7 [ffffffc08ef2bd30] dentry_unlink_inode at ffffffe52c2d7204
#8 [ffffffc08ef2bd50] __dentry_kill at ffffffe52c2d3dcc
#9 [ffffffc08ef2bd80] dput at ffffffe52c2d3c3c
#10 [ffffffc08ef2bda0] __fput at ffffffe52c2b0a7c
#11 [ffffffc08ef2bde0] ____fput at ffffffe52c2b1034
#12 [ffffffc08ef2bdf0] task_work_run at ffffffe52beea200
#13 [ffffffc08ef2be20] exit_to_user_mode_loop at ffffffe52bfbc17c
#14 [ffffffc08ef2be80] el0_svc at ffffffe52d1f8e54
#15 [ffffffc08ef2beb0] el0t_64_sync_handler at ffffffe52d1f8d10
Cc: stable@kernel.org
Fixes: 05e65c14ea59 ("f2fs: support large folio for immutable non-compressed case")
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Zhaoyang Huang <zhaoyang.huang@unisoc.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Add a unit test for CPPC Performance Priority that modifies the floor
perf and confirms if the modification was successful similar to the
energy_performance_preference unit test.
On platforms that do not support X86_FEATURE_CPPC_PERF_PRIO, the test
returns -EOPNOTSUPP and amd_pstate_ut_check_floor_freq is marked as
"skipped".
Suggested-by: Kalpana Shetty <kalpana.shetty@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lore.kernel.org/r/20260727072056.1248-10-kprateek.nayak@amd.com
Signed-off-by: Mario Limonciello <superm1@kernel.org>
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Extend the EPP unit test to cover the "dynamic" epp mode. Since
"dynamic_epp" is no longer a system-wide toggle, remove the legacy
"dynamic_epp" bits from the unit test.
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lore.kernel.org/r/20260727072056.1248-9-kprateek.nayak@amd.com
Signed-off-by: Mario Limonciello <superm1@kernel.org>
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Symbols exported by amd-pstate.c are ever only needed for amd-pstate-ut.
Introduce EXPORT_SYMBOL_FOR_PSTATE_UT() to export these symbols
selectively to "amd-pstate-ut" namespace as opposed to all GPL modules.
No functional changes intended.
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lore.kernel.org/r/20260727072056.1248-8-kprateek.nayak@amd.com
Signed-off-by: Mario Limonciello <superm1@kernel.org>
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Update the admin-guide for dynamic_epp describing the latest integration
into energy_performance_preference selections.
Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lore.kernel.org/r/20260727072056.1248-7-kprateek.nayak@amd.com
Signed-off-by: Mario Limonciello <superm1@kernel.org>
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Since dynamic_epp has been converted to an
"energy_performance_preference", toggling the feature via the sysfs file
or the kernel cmdline is now redundant.
Remove the sysfs file and the "amd_dynamic_epp" cmdline and only depend
on "energy_performance_preference" to toggle dynamic_epp.
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lore.kernel.org/r/20260727072056.1248-6-kprateek.nayak@amd.com
Signed-off-by: Mario Limonciello <superm1@kernel.org>
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Convert the global "dynamic_epp" toggle into a per-CPU
"energy_performance_preference" mode "dynamic" that allows toggling the
functionality of "dynamic_epp" at a per-CPU level.
Instead of being a system-wide toggle, users can opt into the
functionality of dynamic EPP on a per-CPU basis by switching to the
powersave governor and selecting the "dynamic" mode from the available
performance preferences.
Unlike the previous implementation that had to check for driver mode
before toggling on the functionality, block writes to certain sysfs
files, potentially disallow policy change, etc. the per-CPU toggle fits
naturally into the intended design and provides more granular control to
the user.
The dynamic_epp file is now redundant as the option to toggle it on is
controlled via energy_performance_preference, and the dynamic_epp file
will be removed in the subsequent commit.
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lore.kernel.org/r/20260727072056.1248-5-kprateek.nayak@amd.com
Signed-off-by: Mario Limonciello <superm1@kernel.org>
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Avoid duplication by extracting the switch case that derives EPP based
on platform profile into the amd_pstate_get_epp_from_platform_profile()
helper.
No functional changes intended.
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lore.kernel.org/r/20260727072056.1248-4-kprateek.nayak@amd.com
Signed-off-by: Mario Limonciello <superm1@kernel.org>
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Initialization of bios_min_perf (BIOS Requested CPU Min Freq.) only
succeeds when the driver init finds the CPPC_REQ MSRs to have all 0s
except for MIN_PERF bits.
A kexec puts the driver through the suspend path which, although resets
the min_perf back to bios_min_perf, keeps the rest of the CPPR_REQ
intact with the last value at the time of suspend.
The defensive check for bios_min_perf exists to prevent the min perf
from last CPPC_REQ being incorrectly considered as bios_min_perf when
a kexec switches from an older kernel running the version of driver
which is not aware of bios_min_perf to a newer one.
This scenario is extremely unlikely and Mario suggested it is better to
simplify the initialization rather than complicating the suspend resume
paths.
Drop the defensive check for bios_min_perf initialization and add a
debug message to dump the BIOS Requested Min Freq. to console leaving
enough breadcrumbs for debug if a situation so arises.
Suggested-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lore.kernel.org/r/20260727072056.1248-3-kprateek.nayak@amd.com
Signed-off-by: Mario Limonciello <superm1@kernel.org>
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amd_pstate_update_min_max_limit() sets the min_limit_perf to the
nominal_perf to avoid frequency throttling when the system is idling.
This was found to be an ideal default but is suboptimal for users who
have profiled their workload at different operating frequencies and have
configured the optimal idling frequency via bios_min_perf.
Use the bios_min_perf (if configured) as the min_limit_perf when running
with performance governor. In absence of bios_min_perf, continue using
nominal_perf as the default min_limit_perf to avoid throttling.
Fixes: 608a76b65288 ("cpufreq/amd-pstate: Add support for the "Requested CPU Min frequency" BIOS option")
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lore.kernel.org/r/20260727072056.1248-2-kprateek.nayak@amd.com
Signed-off-by: Mario Limonciello <superm1@kernel.org>
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Xin Xie says:
====================
net: hsr: PRP RedBox (PRP-SAN) support
This series adds PRP RedBox support to the hsr driver: a PRP node that
proxies one or more SANs sitting behind an interlink port (IEC 62439-3,
PRP-SAN). HSR-SAN has been supported since commit 5055cccfc2d1 ("net: hsr:
Provide RedBox support (HSR-SAN)"); this extends the equivalent capability
to PRP, reusing the existing protocol-neutral proxy machinery
(proxy_node_db, hsr_proxy_announce(), hsr_prune_proxy_nodes()).
A SAN behind the interlink does bidirectional unicast with peers on the PRP
network, its source MAC is preserved on the wire, the PRP RCT is correct,
and the RedBox announces each proxied SAN with the RedBox-MAC TLV (Type 30)
in its supervision frames.
The series is bisect-safe: the datapath, duplicate discard and supervision
support are added first; the rtnetlink rejection of "type hsr ... interlink
<dev> proto 1" is removed only in patch 3, once the feature is complete.
Design notes:
- prp_drop_frame() does not walk the node tables. The destination
classification (PRP-network node vs proxied SAN) is resolved once per
frame in fill_frame_info() and cached in struct hsr_frame_info, so the
per egress-port drop decision is O(1) in the softIRQ path. The
classification is gated on PRP RedBox devices (prot_version == PRP_V1 &&
hsr->redbox), so HSR RedBox traffic is not affected.
- The LAN A/B duplicate test is factored into prp_is_lan_dup() so the new
PRP interlink rules in prp_drop_frame() do not change hsr_drop_frame()
behaviour, including the NETIF_F_HW_HSR_FWD path. This is software PRP
RedBox only; it adds no new hardware-offload contract.
- The supervision emitter uses pre-reserved tailroom (hsr_init_skb() +
skb_put()) on the existing GFP_ATOMIC path; no skb_linearize() or
pskb_expand_head(). The RedBox-MAC TLV is followed by an explicit EOT
(Type 0, Length 0); padding via skb_put_padto(ETH_ZLEN) and the 6-byte
PRP RCT remain at the absolute tail of the egress frame.
- The hsr_get_node() hsr_ethhdr length guard is relaxed only for PRP
supervision frames (prot_version == PRP_V1 && ETH_P_PRP && is_sup), which
are untagged with mac_len == ETH_HLEN. HSR (ETH_P_HSR) supervision is
front-tagged and keeps the original length requirement, so HSR
malformed-frame filtering is unchanged.
====================
Link: https://patch.msgid.link/20260717201457.54-1-xiexinet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add a kselftest that builds a PRP RedBox (interlink) with a SAN behind the
interlink and a peer DANP, and checks bidirectional unicast across the
interlink, preservation of the SAN source MAC on the PRP network, and that
the proxy-announce supervision frame carries the RedBox-MAC TLV (Type 30)
terminated by an EOT marker. It reuses the hsr_common.sh / lib.sh helpers
and skips cleanly on a kernel or iproute2 without PRP interlink support.
The background ping is killed by its exact PID: ip netns exec does not
isolate the PID namespace, so a pattern-based pkill could hit unrelated
processes on the host.
Signed-off-by: Xin Xie <xiexinet@gmail.com>
Link: https://patch.msgid.link/20260717201457.54-5-xiexinet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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With the PRP interlink datapath, duplicate discard and supervision support
in place, a PRP device can act as a RedBox. Remove the rtnetlink rejection
of "type hsr ... interlink <dev> proto 1"; the feature is implemented
unconditionally by the preceding patches.
Signed-off-by: Xin Xie <xiexinet@gmail.com>
Link: https://patch.msgid.link/20260717201457.54-4-xiexinet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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A PRP RedBox must announce the SANs it proxies so peers populate their
proxy node tables. The proxy-announce machinery (hsr_proxy_announce(),
armed via hsr->redbox) already iterates proxy_node_db under RCU and calls
send_sv_frame() once per SAN, but the PRP sender emitted neither the
announced SAN MAC nor the RedBox-MAC TLV that IEC 62439-3 requires.
Extend send_prp_supervision_frame() so that, for a proxy-announce
(identified by the interlink port, an O(1) test), the frame carries the
proxied SAN MAC as MacAddressA followed by the RedBox-MAC TLV (Type 30)
and an explicit End-of-TLV marker before padding.
hsr_get_node() must also accept the reinjected proxy-announce: a PRP
supervision frame is an untagged ETH_P_PRP frame (mac_len == ETH_HLEN, the
RCT is appended only on egress) sourced from macaddress_redbox, which is
never learned from data. Exempt only PRP supervision frames from the
hsr_ethhdr length guard; HSR (ETH_P_HSR) supervision is front-tagged and
keeps the original guard, so HSR malformed-frame filtering is unchanged.
Also align macaddress_redbox so that ether_addr_copy() and
ether_addr_equal() on it are safe on architectures without efficient
unaligned access.
Signed-off-by: Xin Xie <xiexinet@gmail.com>
Link: https://patch.msgid.link/20260717201457.54-3-xiexinet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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A PRP RedBox proxies SANs that sit behind an interlink port: their frames
must reach the PRP network with the SAN source MAC preserved, and PRP
unicast must be steered between the LAN and the SAN segment correctly.
Add the PRP interlink forwarding rules to prp_drop_frame() and give RedBox
nodes a second duplicate-discard slot so the two LAN copies of a frame
destined to a SAN collapse to a single delivery out the interlink.
The destination classification (is the unicast DA a PRP-network node or a
proxied SAN) is resolved once per frame in fill_frame_info(), gated to PRP
RedBox devices, and cached in struct hsr_frame_info, so prp_drop_frame()
stays O(1) and does not walk the node tables for every candidate egress
port in the softIRQ path. HSR RedBox frame classification is untouched.
Factor the LAN A/B duplicate test into prp_is_lan_dup() so the new PRP
interlink rules do not change hsr_drop_frame() behaviour, including the
NETIF_F_HW_HSR_FWD path which keeps using the LAN-duplicate test only.
Publish the RedBox state before the first hsr_add_port(): the slave and
interlink rx handlers are live from hsr_add_port() on and rtnl does not
stop softirq processing, so a frame could otherwise be handled while
hsr->redbox is still false. hsr_add_node() sizes each node's per-port
sequence state from hsr->redbox; a node learned in that window would get
a single-port sequence block, breaking the interlink duplicate discard
(WARN_ON_ONCE plus duplicate delivery to the SAN) and letting the
supervision sequence-block merge read beyond the source node's allocated
sequence bitmap. Publishing the flag before any port exists makes the
per-node sizing uniform by construction. This is safe: the proxy
announce timer is only armed from hsr_check_announce() once the master
is running, the packet-path readers of hsr->redbox tolerate an empty
proxy node database and an absent interlink port, and the
prune_proxy_timer is still armed only after the interlink port has been
attached successfully.
Additionally bound the supervision sequence-block merge by the smaller
of the two nodes' seq_port_cnt as defense in depth against mismatched
node sizes.
Signed-off-by: Xin Xie <xiexinet@gmail.com>
Link: https://patch.msgid.link/20260717201457.54-2-xiexinet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Blocks of pinfile may not aligned to section size due to wrong use
on pinfile, result in heavy overhead of GC, let avoid this by
adding additional check condition in f2fs_setattr().
- truncate -s 8mb pinfile
: random checkpoint may persist filesize w/ inode
- fallocate -o 0 -l 8mb pinfile
- f2fs_fallocate
- f2fs_expand_inode_data
- f2fs_allocate_pinning_section
- f2fs_map_blocks
- f2fs_map_lock
- __allocate_data_block
- file_need_truncate
: w/ FADVISE_TRUNC_BIT, we can expect unaligned mapping can be
truncated while open() if f2fs is not umount abnormally
- f2fs_map_unlock
: following f2fs checkpoint and sudden power-cut
- mount
- open pinfile
- f2fs_file_open
- finish_preallocate_blocks
- truncate_setsize
: filesize is 8mb
- f2fs_truncate
: can only truncate block outside filesize, rather than truncating
unaligned blocks inside filesize
Fixes: f5a53edcf01e ("f2fs: support aligned pinned file")
Cc: stable@kernel.org
Cc: Daeho Jeong <daehojeong@google.com>
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Instead of allocating f2fs_gc_kthread dynamically, embed it in
f2fs_sb_info. This simplifies lifetime management and prepares for
fixing race conditions during teardown.
- __sbi_store - remount|shutdown
- f2fs_stop_gc_thread
- access sbi->gc_thread
- sbi->gc_thread = NULL
- access sbi->gc_thread->f2fs_gc_task
Fixes: 52190933c37a ("f2fs: sysfs: introduce critical_task_priority")
Fixes: 7950e9ac638e ("f2fs: stop gc/discard thread after fs shutdown")
Cc: stable@kernel.org
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Commit 02117b8ae9c0 ("f2fs: Set GF_NOFS in read_cache_page_gfp while doing
f2fs_quota_read") adds GFP_NOFS in f2fs_quota_read() to avoid below deadlock:
- do_sys_open
- vfs_open
- dquot_file_open
- dquot_initialize
- dqget
- dquot_acquire
: locks &dqopt->dqio_mutex (VFS Quota Mutex)
- qtree_read_dquot
- f2fs_quota_read
- read_mapping_page (GFP_KERNEL / allows GFP_FS)
- __alloc_pages_nodemask
- try_to_free_pages (Direct Reclaim)
- prune_icache_sb
- evict
- f2fs_evict_inode
- dquot_drop
- dqput
- dquot_commit
: tries to lock &dqopt->dqio_mutex again
==> DEADLOCK (waiting for itself)
As Jan Kara mentioned, quota system has fixed this issue w/ commit
537e11cdc7a6 ("quota: Prevent memory allocation recursion while holding
dq_lock"), so this GFP_NOFS flag should be relic, let's use GFP_KERNEL
instead.
Cc: Jan Kara <jack@suse.cz>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Chao Yu <chao@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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This patch proposes to drop FGP_NOFS from f2fs_filemap_get_folio()
in f2fs_write_begin(), I don't see there is potential deadlock issue
when __filemap_get_folio() calling into filesystem reclaim interfaces,
e.g. .writepages, evict_inode, shrinker.
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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cifs_file_set_size() calls cifs_setsize() on success, which calls
i_size_write(), updating i_size to the new value. The subsequent
check attrs->ia_size != i_size_read() in both cifs_setattr_unix()
and cifs_setattr_nounix() therefore always evaluates false after a
successful cifs_file_set_size(), making the smp_store_release() of
time_last_write dead code. The truncate path was unprotected against
stale readdir size updates.
Move the stamp to before the cifs_file_set_size() RPC call, guarded
by attrs->ia_size != i_size_read() to exclude no-op same-size
ftruncate(2) calls from stamping time_last_write unnecessarily.
On the error path the stamp remains rather than being restored:
restoring a stale snapshot (prev_tlw) could silently erase a
concurrent _cifsFileInfo_put() close stamp if that close arrived
between the READ_ONCE and the smp_store_release. readdir is
suppressed until the stamp expires, which extends beyond one acregmax
if the caller retries failed truncations. stat() is unaffected: the
cifs_revalidate_dentry_attr() path calls cifs_fattr_to_inode() with
from_readdir=false, which bypasses the time_last_write check in
is_size_safe_to_change() entirely and always writes the authoritative
QUERY_INFO result to i_size.
Remove the now-unreachable stamp from the dead block in both functions.
Fixes: e8a8d54c2d50 ("cifs: prevent readdir from changing file size due to stale directory metadata")
Signed-off-by: Frank Sorenson <sorenson@redhat.com>
Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
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The time_last_write stamp was scattered across cifs_close(),
smb2_deferred_work_close(), and the three drain functions in misc.c.
This missed the case where background I/O holds the final reference
after userspace close() returns, and required explicit maintenance at
each close-path site.
Move the smp_store_release() into _cifsFileInfo_put(), immediately
before releasing open_file_lock. This single location covers all
close paths unconditionally: normal close, background I/O dropping the
final reference, deferred close via timer or external drain. The
spinlock's store-release/load-acquire pairing with is_inode_writable()
already provides the ordering guarantee documented in
is_size_safe_to_change().
Remove the now-redundant stamps from cifs_close(),
smb2_deferred_work_close(), and all six stamp sites in the misc.c
deferred-close drain functions.
Fixes: e8a8d54c2d50 ("cifs: prevent readdir from changing file size due to stale directory metadata")
Signed-off-by: Frank Sorenson <sorenson@redhat.com>
Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
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struct popup_action has a thread but this is duplicated in the
map_symbol. Remove the non-map_symbol version so that there's only ever
1 thread with a popup_action.
Assisted-by: Antigravity:gemini-3.5-flash
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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If a thread isn't given to map_symbol__get_arch(), try harder to determine
the arch for disassembly. Do this by utilizing fallback paths such as
reading the e_machine from a map's DSO ELF header for user-space libraries.
Additionally, rely on map__kmaps() and maps__machine() to reliably extract
the recorded machine environment and e_machine for kernel and kallsyms maps,
perfectly preventing silent, incorrect host fallbacks to uname() during
cross-platform Capstone annotation sessions.
At the same time, ensure all remaining uses of a map_symbol's thread pointer
do not assume it is non-NULL to eliminate UI segmentation faults, and remove
the fragile, redundant thread__get_arch() function to streamline the
annotate and disassembly subsystem architecture.
Fixes: 0e26ba5a8774 ("perf disasm: Refactor arch__find and initialization of arch structs")
Assisted-by: Antigravity:gemini-3.5-flash
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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In hists_browser__zoom_map(), the active dso is assigned as a raw
pointer to hists->dso_filter without acquiring a reference using
dso__get(). This creates a potential use-after-free defect if the
underlying dso is released while the filter remains active.
Fix it by properly acquiring a reference via dso__get() when assigning
the filter, and releasing it with dso__put() when clearing it.
Additionally, since the browser stack relies on pstack__new() and deletes
it completely upon exiting, we must fully reset the persistent hists
structure by un-eliding columns and recalculating histogram filter
states for dso, thread, and symbols upon exit to guarantee immaculate,
uncorrupted state across browser tab switching.
Closes: https://lore.kernel.org/linux-perf-users/20260709170834.52F1A1F000E9@smtp.kernel.org/
Assisted-by: Antigravity:gemini-3.5-flash
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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Populates the map_symbol thread in the UI code to fix the e_machine
lookup for cross-platform disassembly when using the annotate action.
At the same time, refactor the UI options and actions generation to
comply with the perf subsystem's strict reference counting abstraction
requirements for 'struct map_symbol' and 'struct thread'. Introduce
explicit reference acquiring via map_symbol__copy() and thread__get() for
menu items, safely clean them up between menu iterations using a new
free_popup_actions() helper, and utilize insulated temporary action
variables for direct hotkey handler execution.
Fixes: 0e26ba5a8774 ("perf disasm: Refactor arch__find and initialization of arch structs")
Reported-by: Josh Stone <jistone@redhat.com>
Assisted-by: Antigravity:gemini-3.5-flash
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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In add_script_opt(), when the browser selection has no valid hist_entry
(for example, when all entries are filtered out or the trace is empty),
hist_browser__selected_entry() returns NULL.
Add an explicit check for he == NULL prior to accessing he->time to avoid a
potential NULL pointer dereference crash.
Assisted-by: Antigravity:gemini-3.5-flash
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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In evsel__hists_browse(), the local stack array 'buf' is assigned
directly to the persistent 'hists->symbol_filter_str' pointer. When the
browser returns or is exited, this dangling pointer remains active in
the 'hists' struct and is read asynchronously by the perf top background
timer, triggering a stack use-after-return.
Fix it by properly duplicating the input string using strdup(), safely
invoking zfree() to prevent memory leaks when overwriting, and cleanly
resetting and freeing the symbol filter string upon exiting the browser.
Assisted-by: Antigravity:gemini-3.5-flash
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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`PACKED_REGISTRY_TABLE::size` describes the entire table, including its
fixed-size header. `SetRegistry` currently initializes it with only the
variable payload length, omitting the 8 bytes header.
Fix this by using `CommandToGsp::size` to obtain the actual command
size, including its header.
Fixes: 19b0a6e7c2be ("gpu: nova-core: gsp: Add SetRegistry command")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Closes: https://lore.kernel.org/r/20260722075253.B6DDB1F00A3D@smtp.kernel.org
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patch.msgid.link/20260723-nova-registry-size-fix-v1-1-8f471ba00ab4@nvidia.com
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
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Wei Fang says:
====================
net: enetc: cleanups and improvements
The first group of patches (1, 2, 5-7) eliminates code duplication
between the ENETC v1 and v4 drivers. Since both hardware generations
share identical register layouts for MAC promiscuous mode, MAC hash
filters, and VLAN promiscuous mode - differing only in register address
offsets - common helper functions are extracted into enetc_pf_common.c
and shared by both drivers.
Patch 3 converts ndo_set_rx_mode() to ndo_set_rx_mode_async(), removing
the dedicated workqueue that was previously needed to defer MAC address
list updates to a sleepable context.
Patch 4 replaces counter-based MAFT entry tracking with a bitmap, which
keeps hardware and software state in sync and avoids partial failures
during entry allocation.
Patches 8 and 9 fix phylink-related issues: removing invalid code from
enetc4_pl_mac_link_up() and properly differentiating phylink capabilities
between pseudo-MAC and standalone MAC.
The remaining patches (10-14) are minor cleanups: removing a redundant
VLAN promiscuous mode initialization in probe, using the PCI device name
for the debugfs directory, simplifying port speed configuration, removing
a redundant num_vsi field, using alloc_etherdev_mqs() for the VF driver,
and using kzalloc_flex() for a flexible array allocation.
====================
Link: https://patch.msgid.link/20260720014317.1059359-1-wei.fang@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Replace the open-coded struct_size() + kzalloc() pattern with the
kzalloc_flex() helper when allocating struct enetc_psfp_gate. This
removes the intermediate entries_size local variable and makes the
allocation site more concise.
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Joe Damato <joe@dama.to>
Link: https://patch.msgid.link/20260720014317.1059359-15-wei.fang@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The VF driver uses alloc_etherdev_mq() with ENETC_MAX_NUM_TXQS as the
queue count, which forces the TX and RX queue counts to be equal and
uses a compile-time constant rather than the actual hardware capability.
After enetc_get_si_caps() is called, si->num_tx_rings and
si->num_rx_rings reflect the actual number of rings assigned to the VF
by the PF. For the ENETC VF on LS1028A and the upcoming i.MX95/94, their
SoCs have no more than 6 CPUs, and the number of TX/RX rings allocated
to the VF is less than 8.
Therefore, switch to alloc_etherdev_mqs() so that the TX and RX queue
counts are set independently, each capped at ENETC_MAX_NUM_TXQS, based
on the actual number of rings assigned to the VF by the PF.
Note that if future SoCs have more than 6 CPUs and more than 6 RX rings
allocated to VFs, the size of the int_vector array in struct
enetc_ndev_priv will need to be modified. Similarly, if more than 8 TX
rings are allocated to each int_vector, ENETC_MAX_NUM_TXQS will also
need to be modified.
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Joe Damato <joe@dama.to>
Link: https://patch.msgid.link/20260720014317.1059359-14-wei.fang@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The num_vsi field in struct enetc_port_caps is populated by reading the
NUM_VSI field of the ECAPR1 register, which reports the number of VSIs
supported by the ENETC4 port. When CONFIG_PCI_IOV is enabled, this value
always matches pf->total_vfs, which is obtained from the read-only
PCI_SRIOV_TOTAL_VF register via pci_sriov_get_totalvfs() during probe.
Both ECAPR1[NUM_VSI] and PCI_SRIOV_TOTAL_VF are derived from the same
IERB register EaVFRIDAR[NUM_VF] (a 4-bit field), so they are guaranteed
to be equal. When CONFIG_PCI_IOV is disabled, pci_sriov_get_totalvfs()
returns 0, but this is benign since pci_enable_sriov() is also stubbed
to return -ENODEV, so no VF can be created, and enetc4_enable_all_si()
only enables the PF SI (PSI).
Since pf->total_vfs already reflects the number of VFs that can actually
be used, and is the established convention in the sibling FSL_ENETC PF
driver, there is no need to read and cache num_vsi separately in the port
capabilities structure. Remove the num_vsi field from enetc_port_caps,
and replace all uses of pf->caps.num_vsi with pf->total_vfs in the ring
allocation, SI enable, and debugfs code paths. Note that in the MSI-X
configuration, it is still necessary to obtain the actual number of VSIs
from ECAPR1.
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Link: https://patch.msgid.link/20260720014317.1059359-13-wei.fang@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The PSIPVMR in ENETC v4 has the same bit layout and functionality as the
PSIPVMR register in ENETC v1: bit n (n <= 15) controls VLAN promiscuous
mode for SI n. The only difference between the two hardware generations
is the register address offset.
Since the register functionality is identical, the VLAN promiscuous mode
setting code can be shared between ENETC v1 and v4 drivers.
Move enetc_set_si_vlan_promisc() from enetc_pf.c to enetc_pf_common.c
and export it so that it can be shared between the two drivers. Add a
revision check using is_enetc_rev1() to select the correct register
offset (ENETC_PSIPVMR for v1 and ENETC4_PSIPVMR for v4) while keeping
the same logic.
Remove the v4-specific enetc4_pf_set_si_vlan_promisc() from enetc4_pf.c
and replace its call site with the new common enetc_set_si_vlan_promisc()
to eliminate code duplication.
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Joe Damato <joe@dama.to>
Link: https://patch.msgid.link/20260720014317.1059359-12-wei.fang@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Remove the enetc_set_vlan_promisc(), enetc_enable_si_vlan_promisc() and
enetc_disable_si_vlan_promisc() functions, and introduce a new unified
function enetc_set_si_vlan_promisc() to enable or disable VLAN
promiscuous mode for a specific SI. This simplifies the logic and makes
the interface more straightforward. The vlan_promisc_simap field in
struct enetc_pf is no longer needed to track the current state.
As ENETC V4 only changes the address offset of PSIPVMR register compared
to V1 without any functional difference, enetc_set_si_vlan_promisc() can
be moved to enetc_pf_common.c in the future with minor adjustments to be
reused by the ENETC V4 driver
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Joe Damato <joe@dama.to>
Link: https://patch.msgid.link/20260720014317.1059359-11-wei.fang@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The function enetc4_set_default_si_vlan_promisc() is only called once,
from enetc4_configure_port_si(). Open-code the loop at the call site
and remove the single-use wrapper.
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Joe Damato <joe@dama.to>
Link: https://patch.msgid.link/20260720014317.1059359-10-wei.fang@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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When adding phylink MAC operations support to the NETC switch driver,
Russell King pointed out several pieces of invalid logic in the
.mac_link_up() implementation (see [1] and [2]):
1) Half-duplex backpressure is not supported by the kernel, Ethernet
relies on packet dropping for congestion management.
2) phylink_autoneg_inband() is unnecessary, as RGMII in-band status is
not supported.
3) TX and RX pause are disabled in half-duplex mode, so there is no
need to override them in .mac_link_up().
The same invalid logic is also present in enetc4_pl_mac_link_up(), so
remove the invalid code from it.
Given enetc4_set_hd_flow_control() is removed, pf->caps.half_duplex has
also become useless and should therefore be removed as well.
Link: https://lore.kernel.org/imx/acEIQqI-_oyCym8O@shell.armlinux.org.uk/ # 1
Link: https://lore.kernel.org/imx/acEFwqmAvWls_9Ef@shell.armlinux.org.uk/ # 2
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20260720014317.1059359-9-wei.fang@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The ENETC pseudo-MACs are proprietary internal links that do not
implement any standard MII interface, so restrict their supported PHY
interface modes to PHY_INTERFACE_MODE_INTERNAL only.
Since pseudo-MACs can operate at any speed between 10Mbps and 25Gbps
in multiples of 10Mbps, set their MAC capabilities to cover the full
range of standard full-duplex speeds: 10/100/1000/2500/5000/10000/
20000/25000 Mbps.
For standalone ENETC (v4), expand the supported interface modes to
include 10GBASER in addition to the existing RGMII, SGMII, 1000BASEX,
2500BASEX and USXGMII modes, with MAC capabilities up to 10G. MAC_1000
is replaced with MAC_1000FD to explicitly exclude 1000M half-duplex,
which is not supported.
Note that 10GBASE-R mode of ENETC v4 has not supported yet, the current
patch adds PHY_INTERFACE_MODE_10GBASER simply as preparation for the
upcoming support of the 10GBASE-R mode.
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20260720014317.1059359-8-wei.fang@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Since phylink may pass SPEED_UNKNOWN to mac_link_up, handle it
explicitly by defaulting to SPEED_10, then replace the switch statement
with a direct call to PCR_PSPEED_VAL(). Also update PCR_PSPEED_VAL() to
use FIELD_PREP() for proper field masking instead of an open-coded shift.
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20260720014317.1059359-7-wei.fang@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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enetc_create_debugfs() is called right after register_netdev(), at which
point ndev->name still holds the format "eth%d" (e.g., eth0) rather than
the final assigned name (e.g., via udev rules).
Use pci_name() instead of netdev_name() to name the debugfs directory.
The PCI device name is unique, stable, and available from the start,
making it a more reliable identifier for the debugfs entry. Therefore,
the observable debugfs path from something like
/sys/kernel/debug/eth0/mac_filter to a PCI BDF-style path such as
/sys/kernel/debug/0002:00:00.0/mac_filter.
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Joe Damato <joe@dama.to>
Link: https://patch.msgid.link/20260720014317.1059359-6-wei.fang@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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