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Document the basic hardware layout of SMSC (now Microchip)
EMC1402/1403/1404/1428 thermal sensors.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20260731113007.145322-2-clamor95@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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nvme_tcp_handle_r2t() does not check the direction of the request the
R2T refers to. A malicious controller can send an R2T for a READ and
the host will answer it: nvme_tcp_setup_h2c_data_pdu() builds the
H2CData header and nvme_tcp_try_send_data() sends the request's data
buffer. That buffer is the READ destination, so its contents go to the
controller.
The command then completes normally and nothing is logged.
Against a test controller that answers every READ with an R2T, a 4096
byte buffered read returned all 4096 bytes, split over two R2Ts. The
pages contained stale kernel data, including an array of struct page
pointers.
Reject an R2T for a request that is not a write.
Fixes: 3f2304f8c6d6 ("nvme-tcp: add NVMe over TCP host driver")
Cc: stable@vger.kernel.org
Signed-off-by: Yehyeong Lee <yhlee@isslab.korea.ac.kr>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Commit 25e5cb780e62 ("nvme-tcp: fix possible crash in write_zeroes
processing") established that blk_rq_payload_bytes() must not be read
without first checking blk_rq_nr_phys_segments(), and recorded the
result in nvme_tcp_setup_cmd_pdu() as req->data_len. The receive side
was left as it was.
The two differ for REQ_OP_WRITE_ZEROES, which has no physical segments
but a non-zero blk_rq_bytes(), so setup leaves req->iter untouched
while the receive gate lets a C2HData through and nvme_tcp_recv_data()
copies into whatever the previous command on that tag left there. The
driver-private area is zeroed only when the tag set is allocated.
Reproduced with a test target that leaves a residual iterator on a tag
and then sends a C2HData for a WRITE_ZEROES command on the same tag:
BUG: KASAN: wild-memory-access in _copy_to_iter+0x642/0x1330
Write of size 512 at addr ffe728c2175dfa81 by task kworker/0:1H/103
CPU: 0 UID: 0 PID: 103 Comm: kworker/0:1H Not tainted 7.2.0-rc5-NVMETCP-gf5098b6bae76 #1 PREEMPT(lazy)
Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: nvme_tcp_wq nvme_tcp_io_work
Call Trace:
<TASK>
dump_stack_lvl+0x53/0x70
kasan_report+0xce/0x100
? _copy_to_iter+0x642/0x1330
kasan_check_range+0x105/0x1b0
__asan_memcpy+0x3c/0x60
_copy_to_iter+0x642/0x1330
? __pfx_sock_has_perm+0x10/0x10
? worker_thread+0x45b/0xd10
? __pfx__copy_to_iter+0x10/0x10
? _raw_spin_lock_bh+0x83/0xe0
? __pfx__raw_spin_lock_bh+0x10/0x10
__skb_datagram_iter+0xf3/0x820
? __pfx_simple_copy_to_iter+0x10/0x10
? __asan_memcpy+0x3c/0x60
? skb_copy_bits+0x58d/0x830
skb_copy_datagram_iter+0x37/0x120
nvme_tcp_recv_skb+0xa07/0x4320
? __pfx_nvme_tcp_recv_skb+0x10/0x10
__tcp_read_sock+0x1ab/0x810
? __pfx_nvme_tcp_recv_skb+0x10/0x10
? __pfx_lock_sock_nested+0x10/0x10
? __pfx___tcp_read_sock+0x10/0x10
nvme_tcp_try_recv+0x152/0x1e0
? __pfx_nvme_tcp_try_recv+0x10/0x10
? __pfx_mutex_unlock+0x10/0x10
nvme_tcp_io_work+0x1e4/0x6c0
? __schedule+0x181a/0x49f0
? __pfx_nvme_tcp_io_work+0x10/0x10
process_one_work+0x633/0x1030
Keep the blk_rq_payload_bytes() test and add req->data_len to it. The
old test is what rejects a C2HData naming a tag that is no longer in
flight, because blk_update_request() zeroes rq->__data_len on
completion; req->data_len and req->curr_bio are driver-private and
survive completion, so they cannot stand in for it. Setup initialises
the iterator only when both req->curr_bio and req->data_len are set, so
the gate now tests the same two.
Fixes: 25e5cb780e62 ("nvme-tcp: fix possible crash in write_zeroes processing")
Cc: stable@vger.kernel.org
Signed-off-by: Yehyeong Lee <yhlee@isslab.korea.ac.kr>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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nvme_tcp_recv_data() completes a request once the current C2HData PDU
has been consumed. Nothing compares the total bytes received against
the length the command asked for: struct nvme_tcp_request has no
receive-side counter, queue->data_remaining is per queue, and
blk_mq_end_request() completes for blk_rq_bytes(rq) unconditionally
with no residual concept anywhere above.
A controller can therefore answer a 4096-byte read with 512 bytes and
have it reported as a complete read; user space then gets 4096 bytes of
which 3584 are whatever was already in the page. I reproduced that with
a test target.
Count the bytes received and refuse to complete a successful read whose
count does not match, at the two NVME_TCP_F_DATA_SUCCESS paths and in
nvme_tcp_process_nvme_cqe(). The success test shifts req->status right
by one, because the driver keeps the wire value there and shifts it on
completion, so the check must see what the completion path will see.
Only REQ_OP_READ is checked, because there the length comes from the
sectors the request covers; a passthrough command is built by its
submitter, which picks both command and buffer, so the kernel has
nothing to compare against.
Fixes: 3f2304f8c6d6 ("nvme-tcp: add NVMe over TCP host driver")
Cc: stable@vger.kernel.org
Signed-off-by: Yehyeong Lee <yhlee@isslab.korea.ac.kr>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Zone Management Receive uses the Partial Report (PR) bit in dword 13. On a
partial report (PR bit set), the host accepts an incomplete listing and
Number of Zones must not exceed the zone descriptors copied to the host
buffer. On a full report (PR bit clear), Number of Zones is the total
number of matching zones and every descriptor must fit in the buffer (ZNS
Command Set Specification Rev 1.2, section 3.4.2).
nvmet_bdev_zone_zmgmt_recv_work() already caps Number of Zones for partial
reports, but on a full report it may still succeed when the buffer only
holds part of the matching descriptors. Reject the command in that case.
Signed-off-by: Xixin Liu <liuxixin@kylinos.cn>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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nvme uses page_frag_cache to preallocate PDU for each preallocated request
of block device. Block devices are created in parallel threads,
consequently page_frag_cache is used in not thread-safe manner.
That leads to incorrect refcounting of backstore pages and premature free.
That can be catched by !sendpage_ok inside network stack:
WARNING: CPU: 7 PID: 467 at ../net/core/skbuff.c:6931 skb_splice_from_iter+0xfa/0x310.
tcp_sendmsg_locked+0x782/0xce0
tcp_sendmsg+0x27/0x40
sock_sendmsg+0x8b/0xa0
nvme_tcp_try_send_cmd_pdu+0x149/0x2a0
Then random panic may occur.
Fix that by serializing the usage of page_frag_cache.
Fixes: 4e893ca81170 ("nvme_core: scan namespaces asynchronously")
Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Since commit b58da2d270db ("nvme: update keep alive interval when kato
is modified"), a Set Features (KATO) passthrough command lets userspace
start keep-alive on any transport. nvme_keep_alive_work() allocates with
BLK_MQ_REQ_RESERVED, but nvme_alloc_admin_tag_set() reserves admin tags
only for fabrics, so on other transports the allocation trips
WARN_ON_ONCE() in blk_mq_get_tag() and fails:
nvme nvme0: keep-alive failed: -11
Several Set Features change controller state the driver manages itself
and cannot react to when set behind its back. Reject these in
nvme_admin_cmd_allowed():
- KATO on non-fabrics (keep-alive is only armed for fabrics; on PCIe
it has no reserved tag and harms idle power states)
- Host Behavior Support, Host Memory Buffer, Number of Queues, and
Autonomous Power State Transition (all driver-managed)
Keep Alive on fabrics is unchanged; I/O commands are unaffected as the
check is confined to the admin path (ns == NULL).
Link: https://lore.kernel.org/linux-nvme/20260523225629.3964037-1-coshi036@gmail.com/
Fixes: b58da2d270db ("nvme: update keep alive interval when kato is modified")
Found by FuzzNvme.
Acked-by: Sungwoo Kim <iam@sung-woo.kim>
Acked-by: Dave Tian <daveti@purdue.edu>
Acked-by: Weidong Zhu <weizhu@fiu.edu>
Signed-off-by: Chao Shi <coshi036@gmail.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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When a host issues an Identify command with CNS 05h (I/O Command Set
specific Identify Namespace) and CSI 02h (ZNS) targeting a file-backed
namespace, nvmet_execute_identify_ns_zns() calls bdev_is_zoned() on
req->ns->bdev. A file-backed namespace has no block device, so
req->ns->bdev is NULL and bdev_is_zoned() dereferences it, oopsing.
The I/O command set is selected by the host-supplied CSI field and the
command is routed here whenever CONFIG_BLK_DEV_ZONED is enabled,
independent of the namespace backing type, so any file-backed namespace
is exposed.
Reject the command with Invalid Field when the namespace is not backed
by a block device.
Fixes: aaf2e048af27 ("nvmet: add ZBD over ZNS backend support")
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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nvmet_pci_epf_exec_iod_work() submits an I/O command with req->execute()
and then waits for the command to complete and transfers the data back
to the host. This wait is not needed for commands that do not transfer
data from the device to the host. To decide whether that wait is needed,
it reads iod->data_len and iod->dma_dir after calling req->execute().
However, once req->execute() is called, the command may complete
asynchronously on another CPU. For commands that do not require a
device-to-host data transfer, nvmet_pci_epf_queue_response() calls
nvmet_pci_epf_complete_iod() directly, which can free the iod before it
reads iod->data_len and iod->dma_dir, resulting in the KFENCE use-after-
free:
BUG: KFENCE: use-after-free read in nvmet_pci_epf_exec_iod_work+0x288/0x798 [nvmet_pci_epf]
Use-after-free read at 0x00000000fdfa6d03 (in kfence-#63):
nvmet_pci_epf_exec_iod_work+0x288/0x798 [nvmet_pci_epf]
process_one_work+0x15c/0x4f0
worker_thread+0x18c/0x30c
kthread+0x130/0x140
ret_from_fork+0x10/0x20
kfence-#63: 0x00000000e3de0e71-0x00000000c938ad62, size=712, cache=kmalloc-1k
allocated by task 10 on cpu 0 at 73.995480s (0.005122s ago):
mempool_kmalloc+0x1c/0x28
mempool_alloc_noprof+0x40/0x9c
nvmet_pci_epf_poll_sqs_work+0xd4/0x344 [nvmet_pci_epf]
process_one_work+0x15c/0x4f0
worker_thread+0x18c/0x30c
kthread+0x130/0x140
ret_from_fork+0x10/0x20
freed by task 131 on cpu 3 at 73.995521s (0.008385s ago):
mempool_kfree+0x10/0x20
mempool_free+0x44/0x64
nvmet_pci_epf_free_iod+0x88/0x98 [nvmet_pci_epf]
nvmet_pci_epf_cq_work+0xfc/0x280 [nvmet_pci_epf]
process_one_work+0x15c/0x4f0
worker_thread+0x18c/0x30c
kthread+0x130/0x140
ret_from_fork+0x10/0x20
Fix this by referring to iod->data_len and iod->dma_dir before calling
req->execute(). The remaining iod accesses such as iod->status are only
reached on the device-to-host read path. In this case,
nvmet_pci_epf_queue_response() signals iod->done instead of freeing the
iod, so the iod stays valid.
Fixes: 0faa0fe6f90e ("nvmet: New NVMe PCI endpoint function target driver")
Cc: stable@vger.kernel.org
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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nvmet_pci_epf_create_cq() calls nvmet_cq_create(), which takes a
reference on the controller and installs the completion queue. If the
subsequent PCI address-space mapping fails or returns a too-small partial
mapping, the function jumps to err_internal / err_unmap_queue without
calling nvmet_cq_put(). The matching put in nvmet_pci_epf_delete_cq() is
gated on NVMET_PCI_EPF_Q_LIVE, which is only set after the mapping
succeeds, so teardown never releases these references. A remote PCI host
that drives Create IO CQ commands with a failing PRP1/pci_addr therefore
leaks the CQ and a controller reference on each attempt.
Drop the CQ reference on the mapping-failure paths. The err_internal and
err_unmap_queue labels are only reachable after nvmet_cq_create() has
succeeded, so this pairs the create/put correctly.
Fixes: 0faa0fe6f90e ("nvmet: New NVMe PCI endpoint function target driver")
Cc: stable@vger.kernel.org
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Assisted-by: Claude:claude-opus-4-8
Signed-off-by: Yifei Gao <gyf161023@gmail.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Now that we program the DMA direction correctly the NULL check that used
to make commands fail passes. Another side effect of this bit was that
non-align buffers on the admin queue were silently allowed and that's
been fixed now as well and we this don't need this chicken bit anymore.
More importantly, starting with the firmware installed with macOS 15,
which is required for M4 but can also be installed on the previous SoCs,
the controller no longer exposes this control register and any access
SErrors instead. Just drop the write entirely.
Fixes: 5bd2927aceba ("nvme-apple: Add initial Apple SoC NVMe driver")
Tested-by: Joshua Peisach <jpeisach@ubuntu.com>
Tested-by: Janne Grunau <j@jannau.net>
Tested-by: Nick Chan <towinchenmi@gmail.com>
Signed-off-by: Sven Peter <sven@kernel.org>
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Now that we have a quick to align buffers on the admin queue to the NVMe
controller page size use it for Apple controllers. This fixes pre-M1
controllers, which always rejected unaligned requests, and also makes
this driver work for M4 SoCs and for M1/M2/M3 SoCs that have been
updated to the firmware shipped with macOS 15.
Fixes: 5bd2927aceba ("nvme-apple: Add initial Apple SoC NVMe driver")
Tested-by: Joshua Peisach <jpeisach@ubuntu.com>
Tested-by: Janne Grunau <j@jannau.net>
Tested-by: Nick Chan <towinchenmi@gmail.com>
Signed-off-by: Sven Peter <sven@kernel.org>
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Apple controllers seem to require any queue buffers on the admin queue
to be aligned to the NVMe controller page size. Weirdly, this constraint
does not apply to the i/o queue where any alignment is fine. This has
always been required on pre-M1 controllers and is required starting with
macOS 15 firmware or post-M4 controllers again. On M1/M2/M3 we only got
away with this because there was a chicken bit to disable this
requirement. Let's add a quirk that enforces this alignment.
Tested-by: Joshua Peisach <jpeisach@ubuntu.com>
Tested-by: Janne Grunau <j@jannau.net>
Tested-by: Nick Chan <towinchenmi@gmail.com>
Signed-off-by: Sven Peter <sven@kernel.org>
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macOS always sets this to zero and the firmware starting with macOS 15
has started to complain about what we're doing here.
Fixes: 5bd2927aceba ("nvme-apple: Add initial Apple SoC NVMe driver")
Tested-by: Joshua Peisach <jpeisach@ubuntu.com>
Tested-by: Janne Grunau <j@jannau.net>
Tested-by: Nick Chan <towinchenmi@gmail.com>
Signed-off-by: Sven Peter <sven@kernel.org>
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Setting the DMA direction for commands that don't do any transfer likely
triggered the PRP NULL check for which we needed a chicken bit. That bit
has disappeared starting with macOS 15 so let's just do this correctly
instead.
Fixes: 5bd2927aceba ("nvme-apple: Add initial Apple SoC NVMe driver")
Tested-by: Joshua Peisach <jpeisach@ubuntu.com>
Tested-by: Janne Grunau <j@jannau.net>
Tested-by: Nick Chan <towinchenmi@gmail.com>
Signed-off-by: Sven Peter <sven@kernel.org>
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The admin queue is allocated with blk_mq_alloc_queue() but never
destroyed. nvme_free_ctrl() only drops the last reference and
blk_mq_exit_queue() and blk_sync_queue() never run: the hctx is never
moved to q->unused_hctx_list and the timeout timer and work stay armed on
a queue that is about to be freed which will eventually oops inside
blk_mq_timeout_work().
This can only be triggered when the controller fails to come up and is
then immediately torn down again which is why no one ever ran into this
before.
Let's just copy what the pcie driver does: unquiesce and destroy the admin
queue before nvme_uninit_ctrl().
With this the following WARN followed by a panic no longer happens:
WARNING: block/blk-mq.c:4390 at blk_mq_release+0x194/0x238, CPU#4: kworker/u34:4/119
CPU: 4 UID: 0 PID: 119 Comm: kworker/u34:4 Not tainted 7.2.0-rc1-dirty #248 PREEMPT
Hardware name: Apple Mac mini (M1, 2020) (DT)
Workqueue: nvme-wq apple_nvme_remove_dead_ctrl_work
pstate: 61400005 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : blk_mq_release+0x194/0x238
lr : blk_mq_release+0x58/0x238
sp : ffffc000833a3b50
x29: ffffc000833a3b50 x28: ffff80001d0450f8 x27: ffff800020c95200
x26: 0000000000000088 x25: 0000000000000000 x24: ffff800020f36805
x23: 0000000000000000 x22: ffffc00081a86878 x21: ffff800020be9c60
x20: 0000000000000000 x19: ffff800022501698 x18: 000000000000000a
x17: 7365757165722066 x16: 666f7265776f7020 x15: 0000000000000000
x14: 0000000000000028 x13: 0000000000004def x12: 0000000000000003
x11: 0000000000000000 x10: 0000000000000000 x9 : ffffc000805b4fc8
x8 : ffffc00081915820 x7 : ffffc00081c4f3c8 x6 : 0000000000000001
x5 : 0000000000000004 x4 : ffff800022498d80 x3 : ffffc000833a3b14
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff800022501698
Call trace:
blk_mq_release+0x194/0x238 (P)
blk_put_queue+0x8c/0xf0
nvme_free_ctrl+0x4c/0x260
device_release+0x44/0x128
kobject_put+0xa0/0x120
put_device+0x1c/0x40
nvme_uninit_ctrl+0x48/0x60
apple_nvme_remove+0x54/0xb0
platform_remove+0x28/0x40
device_remove+0x54/0x98
device_release_driver_internal+
device_release_driver+0x20/0x38
apple_nvme_remove_dead_ctrl_wor
process_one_work+0x1f4/0x770
worker_thread+0x1b8/0x360
kthread+0x140/0x160
ret_from_fork+0x10/0x20
irq event stamp: 448
hardirqs last enabled at (447):in_unlock_irqrestore+0x74/0x80
hardirqs last disabled at (448): [<ffffc000811cf5c0>] el1_brk64+0x20/0x60
softirqs last enabled at (0): [ess+0xb28/0x2698
softirqs last disabled at (0): [<0000000000000000>] 0x0
---[ end trace 0000000000000000
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Mem abort info:
ESR = 0x0000000096000005
EC = 0x25: DABT (current EL),
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x05: level 1 translation fault
Data abort info:
ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
CM = 0, WnR = 0, TnD = 0, TagA
GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[0000000000000000] user address
Internal error: Oops: 0000000096000005 [#1] SMP
CPU: 7 UID: 0 PID: 54 Comm: kwor 7.2.0-rc1-dirty #248PREEMPT
Tainted: [W]=WARN
Hardware name: Apple Mac mini (M1, 2020) (DT)
Workqueue: kblockd blk_mq_timeou
pstate: 01400005 (nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : percpu_ref_tryget_many.cons
lr : percpu_ref_tryget_many.constprop.0+0xc0/0x168
sp : ffffc000829cbce0
x29: ffffc000829cbce0 x28: ffff800020be9f48 x27: ffff800013e503c0
x26: 0000000000000108 x25: 000009c05
x23: 0000000000000000 x22: ffffc000819f5000 x21: ffff800020be9f48
x20: ffff8001deda4808 x19: ffff8000a
x17: 00000000580e1fac x16: ffffc00082bbbb7c x15: 0000000000000000
x14: 0000000000000028 x13: 000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : ffffc000829cbc20
x8 : ffffc00081915820 x7 : ffffc0001
x5 : ffff80001ca77d08 x4 : 0000000000000000 x3 : ffff80001ca77cb8
x2 : 0000000000000000 x1 : 000000007
Call trace:
percpu_ref_tryget_many.constpro
blk_mq_timeout_work+0x48/0x298
process_one_work+0x1f4/0x770
worker_thread+0x1b8/0x360
kthread+0x140/0x160
ret_from_fork+0x10/0x20
Code: 91282000 97ed44b2 17ffffd2
---[ end trace 0000000000000000 ]---
Fixes: 5bd2927aceba ("nvme-apple: Add initial Apple SoC NVMe driver")
Tested-by: Joshua Peisach <jpeisach@ubuntu.com>
Tested-by: Janne Grunau <j@jannau.net>
Tested-by: Nick Chan <towinchenmi@gmail.com>
Signed-off-by: Sven Peter <sven@kernel.org>
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nvmet_execute_auth_send() allocates the DH-HMAC-CHAP message buffer with
the host-supplied transfer length (tl) and hands it to
nvmet_auth_negotiate() without passing tl along. nvmet_auth_negotiate()
then reads the negotiate header and, for each of the halen hash
identifiers and dhlen DH group identifiers, indexes into the fixed
idlist[60] array (hashes at idlist[0..halen), groups at idlist[30..]).
Neither the transfer length nor halen/dhlen is validated. A malicious or
non-conformant host can report a tl smaller than the negotiate structure,
or a halen/dhlen larger than the array (both are u8, up to 255), making
the loops read past the end of the allocated buffer (heap out-of-bounds
read). The sibling nvmet_auth_reply() already validates tl against the
structure size; the negotiate path did not.
Pass tl into nvmet_auth_negotiate(), reject a tl that does not cover the
negotiate data plus one full protocol descriptor, and reject halen/dhlen
larger than NVME_AUTH_DHCHAP_MAX_DH_IDS.
Fixes: db1312dd9548 ("nvmet: implement basic In-Band Authentication")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Add any localversion* text to the kernel version string
so that the docs index (home) page accurately indicates what
the docs build version is.
E.g.:
7.2.0-rc6-next-20260807
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260808045331.326769-1-rdunlap@infradead.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/intel into devel
intel-pinctrl for v7.3-1
* Enable CPLD pin control on UP Xtreme i12 board
* Miscellaneous cleanup
Signed-off-by: Linus Walleij <linusw@kernel.org>
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platform_get_irq_optional() returns a positive IRQ number on success or
a negative error code on failure. For an optional IRQ, -ENXIO indicates
that no IRQ is available, while other errors should be propagated.
Instead of only checking for -EPROBE_DEFER, propagate all error codes
returned by platform_get_irq_optional() other than -ENXIO, so that
failures are properly reported to the caller.
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Link: https://patch.msgid.link/20260807103848.46315-1-phucduc.bui@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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When polling Function Busy using read_poll_timeout() the total timeout
and retry delay arguments are swapped. This leads to only a single retry
being processed, it seems the existing users typically do succeed before
the first retry.
Swap the arguments over to ensure the correct polling time.
Reported-by: Ville Saarinen <wiza@saarinenkoti.fi>
Link: https://lore.kernel.org/linux-sound/ansTPGgVNoDJlA5r@opensource.cirrus.com/T/#m680731a2f307f1f5176b27ed5aa560ddc94e5d62
Fixes: 5bc493bf0c37 ("regmap: sdw-mbq: Add support for SDCA deferred controls")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20260811131816.332082-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Enable CONTEXT_ANALYSIS for various directories which do not generate
any warnings (anymore).
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Disable context analysis for various gmap helper functions to get rid
of a few warnings:
arch/s390/mm/gmap_helpers.c:80:1: warning: spinlock 'ptl' is not held on every path through here
arch/s390/mm/gmap_helpers.c:116:2: warning: releasing spinlock 'ptl' that was not held
arch/s390/mm/gmap_helpers.c:186:2: warning: releasing spinlock 'ptl' that was not held
Use __context_unsafe() to give a short comment why for function context
analysis is disabled.
try_get_locked_pte() is disabled since it may return a nonull value
regardless if it returns with a lock held or not.
This cannot be reflected with the context analysis attributes. It is
however possible to workaround this e.g. by adding a another `contended`
function parameter, however this would lead to the next problem:
pte_unmap_unlock() is a macro and therefore doesn't come with the
required context analysis attribute to address this.
For that reason also disable context analysis for
gmap_helper_zap_one_page() and gmap_helper_try_set_pte_unused()
until this has been addressed.
Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Compiling do_secure_storage_access() with context analysis enabled
results in this warning:
arch/s390/mm/fault.c:472:3: warning: releasing spinlock 'fw.ptl' that was not held
472 | folio_walk_end(&fw, vma);
Problem is that folio_walk_end() comes without the required context
analysis attribute. Also the proper attribute cannot be added easily,
since folio_walk_end() is a macro, and not a function.
For the time being disable context analysis only for
do_secure_storage_access() until this is resolved.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Add context analysis attributes to service_level_start() and
service_level_stop() to specify that those functions only
acquire or release a lock.
Addresses the following warnings:
arch/s390/kernel/sysinfo.c:331:1: warning: rw_semaphore 'service_level_sem' is still held at the end of function
arch/s390/kernel/sysinfo.c:329:2: note: rw_semaphore acquired here
329 | down_read(&service_level_sem);
arch/s390/kernel/sysinfo.c:340:2: warning: releasing rw_semaphore 'service_level_sem' that was not held
340 | up_read(&service_level_sem);
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Inline KMSAN arch_local_irq_*() definitions run afoul of
-Wstatic-in-inline. Move them out-of-line. Make sure decompressor and
non-GPL modules see the out-of-line definitions.
Cc: Boqun Feng <boqun@kernel.org>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202607131219.euJHPSJ5-lkp@intel.com/
Suggested-by: Heiko Carstens <hca@linux.ibm.com>
Fixes: 1b301f5f28ba ("s390/irqflags: do not instrument arch_local_irq_*() with KMSAN")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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All virtio code passes clang's compile time context analysis.
Therefore enable CONTEXT_ANALYSIS.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Acked-by: Matthew Rosato <mjrosato@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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All cio code passes clang's compile time context analysis.
Therefore enable CONTEXT_ANALYSIS.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Add __must_hold() attribute to vfio_ccw_sch_quiesce() in order to let
clang's context analysis know that sch->lock must be held on function
entry. This can also be easily verified when inspecting the function.
Without this annotation this leads to a valid warning when context
analysis is enabled:
drivers/s390/cio/vfio_ccw_drv.c:55:9: warning:
expecting spinlock 'sch->lock' to be held at start of each loop [-Wthread-safety-analysis]
55 | ret = cio_cancel_halt_clear(sch, &iretry);
| ^
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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The irq handlers take a struct device pointer and call
dev_get_drvdata() to obtain the driver data. However, the driver
data is only set at the end of probe, after devm_request_irq(),
so an interrupt taken in between causes the handlers to pass a
NULL pointer to readl() and crash.
Pass the private data directly as the devm_request_irq() argument
instead of the device pointer, matching what the handlers expect.
Fixes: 6f6c3c36f091 ("ASoC: xlnx: add pcm formatter platform driver")
Assisted-by: opencode:deepseek-v4-flash-free
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Michal Simek <michal.simek@amd.com>
Link: https://patch.msgid.link/20260806233231.30631-1-rosenp@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Enable CONTEXT_ANALYSIS since s390's pci code compiles now without
warnings.
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Clang's compiler based static context analysis does not work with locks
that are conditionally taken like in __zpci_event_availability():
arch/s390/pci/pci_event.c:402:10: warning: mutex 'get_zdev_by_fid(ccdf->fid).state_lock'
is not held on every path through here [-Wthread-safety-analysis]
Given that code which takes locks conditionally can be considered
suboptimal rework __zpci_event_availability() to get rid of this.
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Clang's compiler based static context analysis does not work with
locks that are conditionally taken like in __zpci_event_error():
arch/s390/pci/pci_event.c:320:2: warning: mutex 'get_zdev_by_fid(ccdf->fid).state_lock'
is not held on every path through here [-Wthread-safety-analysis]
Given that code which takes locks conditionally can be considered
suboptimal rework __zpci_event_error() to get rid of this.
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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All character drivers pass clang's compile time context analysis.
Therefore enable CONTEXT_ANALYSIS.
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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Add __must_hold() attribute to raw3215_make_room() in order to let
clang's context analysis know that "get_ccwdev_lock(raw->cdev)" must be
held on function entry. This can also be easily verified when inspecting
the function.
Without this annotation this leads to a valid warning when context
analysis is enabled:
drivers/s390/char/con3215.c:485:9: warning:
expecting spinlock 'raw->cdev->ccwlock' to be held at start of each loop [-Wthread-safety-analysis]
485 | while (RAW3215_BUFFER_SIZE - raw->count < length) {
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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The enable_data variable gets freed on most error paths in
event_enable_trigger_parse(). Use free() to free it and just before
returning normally, call retain_and_null_ptr(enable_data) just before a
successful exit to keep it from being freed. On success, the enable_data
is assigned to the trigger_data->private_data field.
Also add a comment to why event_trigger_free(trigger_data) is being called
before a successful exit.
Link: https://patch.msgid.link/20260807113558.0ff14e96@gandalf.local.home
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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WARN_ONCE() splats once per call site, so only the first offending event
registered is ever reported. The tree currently has six:
ice_{rx,tx}_dim_template, two hfi1 txq events, mtu3_ep and edma_log_io.
Whichever registers first hides the rest, and each has to be found again
on the next boot.
Add a pr_warn() next to the WARN_ONCE() so every offender is listed, the
same way test_event_printk() already pairs WARN_ON_ONCE() with pr_warn()
for unsafe %p* dereferences. The WARN_ONCE() stays so the condition still
fails tests and panics under panic_on_warn.
Link: https://patch.msgid.link/20260806215256.1680267-1-devnexen@gmail.com
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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The following BTI exception was seen when loading a livepatch module:
Internal error: Oops - BTI: 0000000036000001 [#1] SMP
pstate: 634004c9 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=jc)
pc : kill_orphaned_pgrp+0x0/0x150
lr : do_exit+0x498/0xaf0 [livepatch_combined]
The problem is that the patch module's do_exit() is branching to a
static function in vmlinux using a module PLT veneer (indirect branch),
but the target function doesn't have a BTI landing pad.
Clang 21+ omits the landing pad for static functions which can only be
reached by a direct branch. That's normally fine for ordinary modules
which only branch to global exported functions, but Mark Brown points
out [1] that this isn't guaranteed if the module branches between
sections. Futhermore, livepatch modules use klp relocations to reference
arbitrary kernel symbols, so with CONFIG_RANDOMIZE_MODULE_REGION_FULL
the module is far enough from the kernel that every R_AARCH64_CALL26
needs a PLT.
Put Clang 21+ in the naughty corner alongside GCC, which suffers from
the same issue, by disabling CONFIG_ARM64_BTI_KERNEL until we have a
version of the toolchain with the problem resolved.
Cc: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/da06bbd3-d04b-4d0f-b331-f5b91bc373a5@sirena.org.uk [1]
Fixes: fd1e0fd71f65 ("arm64: Implement HAVE_LIVEPATCH")
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
[will: Stitched together commit message, diff and bug number]
Signed-off-by: Will Deacon <will@kernel.org>
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On platforms which need a non-zero rx sample delay, the RX_SAMPLE_DLY
reg setting is lost after resume. The reason is that the reg may be
reset to 0 after resuming, but dws->cur_rx_sample_dly doesn't know
this fact. Fix this issue by clearing dws->cur_rx_sample_dly in
dw_spi_shutdown_chip().
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Suggested-by: Mark Brown <broonie@kernel.org>
Link: https://patch.msgid.link/20260803135925.12622-1-jszhang@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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Apply the requested initial value via the existing gpio set
wrapper, so that the pin is not left at its previous level.
Afterwards, configure the gpio pin as output.
Fixes: 7671f4949a6c ("gpio: gpio-by-pinctrl: add pinctrl based generic GPIO driver")
Signed-off-by: Alex Tran <alex.tran@oss.qualcomm.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Link: https://patch.msgid.link/20260810-gpio-pinctrl-output-set-val-v3-1-8e35222b5c8c@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
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q6apm_graph_start() increments start_count even when APM_CMD_GRAPH_START
fails, leaving the graph counted as running while the DSP never started
it. A later start - a retried prepare, or a resume after a failed start -
then finds a non-zero count, skips the command and returns success with
no data flowing.
Count the graph only once the DSP has accepted the start. The count then
stays at zero for a graph that never started, so also stop decrementing
below zero in q6apm_graph_stop(): the compressed free path stops
unconditionally, and a negative count would make the next start skip the
command in the same way.
Fixes: 5477518b8a0e ("ASoC: qdsp6: audioreach: add q6apm support")
Assisted-by: Claude:claude-opus-5
Signed-off-by: Jorijn van der Graaf <jorijnvdgraaf@catcrafts.net>
Link: https://patch.msgid.link/20260726211226.94059-1-jorijnvdgraaf@catcrafts.net
Signed-off-by: Mark Brown <broonie@kernel.org>
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Use devm_pm_runtime_set_active_enabled to replace
pm_runtime_set_active() + pm_runtime_enable() and drop the out_pm
error label.
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
Link: https://patch.msgid.link/20260722-spifc-v1-1-e4462a4c6a06@gmail.com
Link: https://patch.msgid.link/20260802-spifc-v2-1-46e9d06a3217@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Jijie Shao says:
====================
net: hns3: some cleanups for hns3 driver
Patch 1 sets msg->desc to NULL after kfree to avoid leaving a
dangling pointer in a struct that is reused across loop iterations.
Patch 2 adds the missing const qualifier to the reg parameter of
hclge_log_error(), which is never modified within the function.
Patch 3 uses the txqueue parameter passed by the ndo_tx_timeout
callback directly, instead of iterating all tx queues to find the
timed out one.
====================
Link: https://patch.msgid.link/20260807095435.2959246-1-shaojijie@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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With CONFIG_HWSPINLOCK=n the of_hwspin_lock_get_id() stub returns 0
unconditionally. In sprd_adi_probe() the guard
if (ret > 0 || (IS_ENABLED(CONFIG_HWSPINLOCK) && ret == 0))
is false for that 0, so it takes the else branch, where the switch has no
case for 0 and lands in
default:
return dev_err_probe(&pdev->dev, ret, "failed to find hwlock id\n");
dev_err_probe() returns its err argument unchanged, so probe logs
"failed to find hwlock id" and then returns 0, reporting success.
sprd_adi_hw_init(), the restart handler and devm_spi_register_controller()
are all skipped: the device binds but no SPI controller is ever
registered.
The hardware spinlock is optional for this controller and the -ENOENT arm
already covers "no hardware spinlock supplied". Treat the stub's 0 the
same way and continue without a lock; all four users of sadi->hwlock
already test it for NULL.
This is not reachable on production kernels. Kconfig has
depends on HWSPINLOCK || (COMPILE_TEST && !HWSPINLOCK)
so the affected configuration exists only under COMPILE_TEST, where no
real hardware is present.
Found by smatch:
drivers/spi/spi-sprd-adi.c:560 sprd_adi_probe() warn: passing zero to 'dev_err_probe'
Fixes: f9adf61e983f ("spi: sprd: adi: Change hwlock to be optional")
Assisted-by: Claude:claude-opus-5
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: Babanpreet Singh <bbnpreetsingh@gmail.com>
Link: https://patch.msgid.link/20260729053543.7-1-bbnpreetsingh@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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The ndo_tx_timeout callback already provides the timed out txqueue
index. Use it directly instead of iterating all tx queues to find
the timed out one.
Use h->kinfo.num_tqps for the bounds check instead of
ndev->num_tx_queues, as the ring array is allocated with num_tqps
entries and num_tx_queues may be larger. This issue has not been
encountered in practice, so it is folded into this cleanup rather
than tracked as a separate bugfix.
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260807095435.2959246-4-shaojijie@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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The reg parameter of hclge_log_error() is never modified within the
function, but is declared as 'char *'. Callers pass const strings,
causing a compiler warning about discarding the 'const' qualifier.
Add the missing const to fix the warning.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260807095435.2959246-3-shaojijie@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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In hclge_query_reg_info(), msg->desc is freed by kfree(), but the
caller continues to use msg across loop iterations. Set msg->desc
to NULL to avoid leaving a dangling pointer in the reused struct.
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260807095435.2959246-2-shaojijie@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Return any error from snd_soc_of_parse_card_name() directly. If the
helper returns successfully but card->name remains unset, report the
missing card name explicitly before returning -ENODEV.
Suggested-by: Andreas Kemnade <andreas@kemnade.info>
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Link: https://patch.msgid.link/20260805044556.38183-1-phucduc.bui@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull probes fix from Masami Hiramatsu:
- Convert ELF entry point to file offset in uprobe test
Convert the ELF entry point address (e_entry) to a file offset using
LOAD segment headers in add_remove_uprobe test. This fixes uprobe
registration failures (-EINVAL) on non-PIE executables where vaddr
exceeds file size.
* tag 'probes-fixes-v7.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
selftests/ftrace: Convert ELF entry point to file offset in uprobe test
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tipc_node_link_down() caches the link pointer before taking n->lock:
struct tipc_link *l = le->link; /* unlocked */
if (!l)
return;
tipc_node_write_lock(n);
if (!tipc_link_is_establishing(l)) { /* deref l */
...
tipc_link_reset(l); /* write into l */
if (delete) {
kfree(l);
le->link = NULL;
The delete=true caller frees that very object under n->lock, so the lock
does not protect the cached pointer against it:
- CPU A, delete=false: tipc_rcv() on TIPC_LINK_DOWN_EVT, or the link
supervision timer via tipc_node_timeout(), reads l unlocked and then
dereferences it under n->lock;
- CPU B, delete=true: netlink TIPC_NL_BEARER_DISABLE -> bearer_disable()
-> tipc_node_delete_links() -> tipc_node_link_down(n, bearer_id, true)
-> kfree(l).
The link is freed with plain kfree(), not kfree_rcu(), and for UDP bearers
disable_media() only schedules the asynchronous cleanup_bearer() work, so
its synchronize_net() runs after the links are already gone. An in-flight
CPU A that has read l therefore dereferences freed memory once B frees it:
a use-after-free read in tipc_link_is_establishing(), and a use-after-free
write via tipc_link_reset() on the establishing branch.
The following trace was captured on 7.2.0-rc5-00284-gaf39eb111ce6:
BUG: KASAN: slab-use-after-free in tipc_link_is_establishing (net/tipc/link.c:285)
Read of size 4 at addr ffff88802e2aa068 by task swapper/2/0
tipc_link_is_establishing (net/tipc/link.c:285)
tipc_node_link_down (net/tipc/node.c:1076)
tipc_node_timeout (net/tipc/node.c:843)
Allocated by task 9549:
tipc_link_create (net/tipc/link.c:490)
tipc_node_check_dest (net/tipc/node.c:1279)
tipc_disc_rcv (net/tipc/discover.c:252)
tipc_udp_recv (net/tipc/udp_media.c:389)
Freed by task 9549:
tipc_node_link_down (net/tipc/node.c:1084)
tipc_node_delete_links (net/tipc/node.c:1320)
bearer_disable (net/tipc/bearer.c:414)
__tipc_nl_bearer_disable (net/tipc/bearer.c:992)
Move the le->link read inside tipc_node_write_lock(), so it is serialised
against the kfree() in the delete path. A racing teardown now either has
not run yet, and we see a valid link, or has already run, and we see NULL.
Fixes: 73f646cec354 ("tipc: delay ESTABLISH state event when link is established")
Cc: stable@kernel.org
Reported-by: TencentOS Corvus AI <corvus@tencent.com>
Assisted-by: tencentos-corvus-ai:kimi-k3
Signed-off-by: Jun Yang <junvyyang@tencent.com>
Reviewed-by: Tung Nguyen <tung.quang.nguyen@est.tech>
Link: https://patch.msgid.link/20260810102147.48191-1-juny24602@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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