kernel/git/stable/linux-stable.git/drivers/misc/fastrpc.c, branch linux-6.10.y

misc: fastrpc: Fix double free of 'buf' in error path

2024-09-12T09:13:07+00:00

commit e8c276d4dc0e19ee48385f74426aebc855b49aaf upstream. smatch warning: drivers/misc/fastrpc.c:1926 fastrpc_req_mmap() error: double free of 'buf' In fastrpc_req_mmap() error path, the fastrpc buffer is freed in fastrpc_req_munmap_impl() if unmap is successful. But in the end, there is an unconditional call to fastrpc_buf_free(). So the above case triggers the double free of fastrpc buf. Fixes: 72fa6f7820c4 ("misc: fastrpc: Rework fastrpc_req_munmap") Reviewed-by: Shuah Khan Reviewed-by: Dan Carpenter Reviewed-by: Srinivas Kandagatla Signed-off-by: Sukrut Bellary Signed-off-by: Srinivas Kandagatla Cc: stable Link: https://lore.kernel.org/r/20240902141409.70371-2-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

Revert "misc: fastrpc: Restrict untrusted app to attach to privileged PD"

2024-08-29T15:35:34+00:00

commit 9bb5e74b2bf88fbb024bb15ded3b011e02c673be upstream. This reverts commit bab2f5e8fd5d2f759db26b78d9db57412888f187. Joel reported that this commit breaks userspace and stops sensors in SDM845 from working. Also breaks other qcom SoC devices running postmarketOS. Cc: stable Cc: Ekansh Gupta Cc: Dmitry Baryshkov Reported-by: Joel Selvaraj Link: https://lore.kernel.org/r/9a9f5646-a554-4b65-8122-d212bb665c81@umsystem.edu Signed-off-by: Griffin Kroah-Hartman Acked-by: Srinivas Kandagatla Fixes: bab2f5e8fd5d ("misc: fastrpc: Restrict untrusted app to attach to privileged PD") Link: https://lore.kernel.org/r/20240815094920.8242-1-griffin@kroah.com Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: Restrict untrusted app to attach to privileged PD

2024-07-03T14:17:53+00:00

Untrusted application with access to only non-secure fastrpc device node can attach to root_pd or static PDs if it can make the respective init request. This can cause problems as the untrusted application can send bad requests to root_pd or static PDs. Add changes to reject attach to privileged PDs if the request is being made using non-secure fastrpc device node. Fixes: 0871561055e6 ("misc: fastrpc: Add support for audiopd") Cc: stable Signed-off-by: Ekansh Gupta Reviewed-by: Dmitry Baryshkov Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20240628114501.14310-7-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: Fix ownership reassignment of remote heap

2024-07-03T14:17:53+00:00

Audio PD daemon will allocate memory for audio PD dynamic loading usage when it is attaching for the first time to audio PD. As part of this, the memory ownership is moved to the VM where audio PD can use it. In case daemon process is killed without any impact to DSP audio PD, the daemon process will retry to attach to audio PD and in this case memory won't be reallocated. If the invoke fails due to any reason, as part of err_invoke, the memory ownership is getting reassigned to HLOS even when the memory was not allocated. At this time the audio PD might still be using the memory and an attemp of ownership reassignment would result in memory issue. Fixes: 0871561055e6 ("misc: fastrpc: Add support for audiopd") Cc: stable Signed-off-by: Ekansh Gupta Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20240628114501.14310-6-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: Fix memory leak in audio daemon attach operation

2024-07-03T14:17:53+00:00

Audio PD daemon send the name as part of the init IOCTL call. This name needs to be copied to kernel for which memory is allocated. This memory is never freed which might result in memory leak. Free the memory when it is not needed. Fixes: 0871561055e6 ("misc: fastrpc: Add support for audiopd") Cc: stable Signed-off-by: Ekansh Gupta Reviewed-by: Dmitry Baryshkov Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20240628114501.14310-5-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: Avoid updating PD type for capability request

2024-07-03T14:17:53+00:00

When user is requesting for DSP capability, the process pd type is getting updated to USER_PD which is incorrect as DSP will assume the process which is making the request is a user PD and this will never get updated back to the original value. The actual PD type should not be updated for capability request and it should be serviced by the respective PD on DSP side. Don't change process's PD type for DSP capability request. Fixes: 6c16fd8bdd40 ("misc: fastrpc: Add support to get DSP capabilities") Cc: stable Signed-off-by: Ekansh Gupta Reviewed-by: Caleb Connolly Signed-off-by: Srinivas Kandagatla Reviewed-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20240628114501.14310-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: Copy the complete capability structure to user

2024-07-03T14:17:53+00:00

User is passing capability ioctl structure(argp) to get DSP capabilities. This argp is copied to a local structure to get domain and attribute_id information. After getting the capability, only capability value is getting copied to user argp which will not be useful if the use is trying to get the capability by checking the capability member of fastrpc_ioctl_capability structure. Copy the complete capability structure so that user can get the capability value from the expected member of the structure. Fixes: 6c16fd8bdd40 ("misc: fastrpc: Add support to get DSP capabilities") Cc: stable Signed-off-by: Ekansh Gupta Reviewed-by: Dmitry Baryshkov Reviewed-by: Caleb Connolly Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20240628114501.14310-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: Fix DSP capabilities request

2024-07-03T14:17:53+00:00

The DSP capability request call expects 2 arguments. First is the information about the total number of attributes to be copied from DSP and second is the information about the buffer where the DSP needs to copy the information. The current design is passing the information about the size to be copied from DSP which would be considered as a bad argument to the call by DSP causing a failure suggesting the same. The second argument carries the information about the buffer where the DSP needs to copy the capability information and the size to be copied. As the first entry of capability attribute is getting skipped, same should also be considered while sending the information to DSP. Add changes to pass proper arguments to DSP. Fixes: 6c16fd8bdd40 ("misc: fastrpc: Add support to get DSP capabilities") Cc: stable Signed-off-by: Ekansh Gupta Reviewed-by: Dmitry Baryshkov Reviewed-by: Caleb Connolly Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20240628114501.14310-2-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

Merge tag 'char-misc-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2024-03-21T20:21:31+00:00

Pull char/misc and other driver subsystem updates from Greg KH: "Here is the big set of char/misc and a number of other driver subsystem updates for 6.9-rc1. Included in here are: - IIO driver updates, loads of new ones and evolution of existing ones - coresight driver updates - const cleanups for many driver subsystems - speakup driver additions - platform remove callback void cleanups - mei driver updates - mhi driver updates - cdx driver updates for MSI interrupt handling - nvmem driver updates - other smaller driver updates and cleanups, full details in the shortlog All of these have been in linux-next for a long time with no reported issue, other than a build warning for the speakup driver" The build warning hits clang and is a gcc (and C23) extension, and is fixed up in the merge. Link: https://lore.kernel.org/all/20240321134831.GA2762840@dev-arch.thelio-3990X/ * tag 'char-misc-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (279 commits) binder: remove redundant variable page_addr uio_dmem_genirq: UIO_MEM_DMA_COHERENT conversion uio_pruss: UIO_MEM_DMA_COHERENT conversion cnic,bnx2,bnx2x: use UIO_MEM_DMA_COHERENT uio: introduce UIO_MEM_DMA_COHERENT type cdx: add MSI support for CDX bus pps: use cflags-y instead of EXTRA_CFLAGS speakup: Add /dev/synthu device speakup: Fix 8bit characters from direct synth parport: sunbpp: Convert to platform remove callback returning void parport: amiga: Convert to platform remove callback returning void char: xillybus: Convert to platform remove callback returning void vmw_balloon: change maintainership MAINTAINERS: change the maintainer for hpilo driver char: xilinx_hwicap: Fix NULL vs IS_ERR() bug hpet: remove hpets::hp_clocksource platform: goldfish: move the separate 'default' propery for CONFIG_GOLDFISH char: xilinx_hwicap: drop casting to void in dev_set_drvdata greybus: move is_gb_* functions out of greybus.h greybus: Remove usage of the deprecated ida_simple_xx() API ...

misc: fastrpc: Pass proper arguments to scm call

2024-03-05T14:30:06+00:00

For CMA memory allocation, ownership is assigned to DSP to make it accessible by the PD running on the DSP. With current implementation HLOS VM is stored in the channel structure during rpmsg_probe and this VM is passed to qcom_scm call as the source VM. The qcom_scm call will overwrite the passed source VM with the next VM which would cause a problem in case the scm call is again needed. Adding a local copy of source VM whereever scm call is made to avoid this problem. Fixes: 0871561055e6 ("misc: fastrpc: Add support for audiopd") Cc: stable Signed-off-by: Ekansh Gupta Reviewed-by: Elliot Berman Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20240224114247.85953-2-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman