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Arnaud Pouliquen f2013d19b7 remoteproc: core: Fix ida_free call while not allocated 
commit 7378aeb664 upstream.

In the rproc_alloc() function, on error, put_device(&rproc->dev) is
called, leading to the call of the rproc_type_release() function.
An error can occurs before ida_alloc is called.

In such case in rproc_type_release(), the condition (rproc->index >= 0) is
true as rproc->index has been  initialized to 0.
ida_free() is called reporting a warning:
[    4.181906] WARNING: CPU: 1 PID: 24 at lib/idr.c:525 ida_free+0x100/0x164
[    4.186378] stm32-display-dsi 5a000000.dsi: Fixed dependency cycle(s) with /soc/dsi@5a000000/panel@0
[    4.188854] ida_free called for id=0 which is not allocated.
[    4.198256] mipi-dsi 5a000000.dsi.0: Fixed dependency cycle(s) with /soc/dsi@5a000000
[    4.203556] Modules linked in: panel_orisetech_otm8009a dw_mipi_dsi_stm(+) gpu_sched dw_mipi_dsi stm32_rproc stm32_crc32 stm32_ipcc(+) optee(+)
[    4.224307] CPU: 1 UID: 0 PID: 24 Comm: kworker/u10:0 Not tainted 6.12.0 #442
[    4.231481] Hardware name: STM32 (Device Tree Support)
[    4.236627] Workqueue: events_unbound deferred_probe_work_func
[    4.242504] Call trace:
[    4.242522]  unwind_backtrace from show_stack+0x10/0x14
[    4.250218]  show_stack from dump_stack_lvl+0x50/0x64
[    4.255274]  dump_stack_lvl from __warn+0x80/0x12c
[    4.260134]  __warn from warn_slowpath_fmt+0x114/0x188
[    4.265199]  warn_slowpath_fmt from ida_free+0x100/0x164
[    4.270565]  ida_free from rproc_type_release+0x38/0x60
[    4.275832]  rproc_type_release from device_release+0x30/0xa0
[    4.281601]  device_release from kobject_put+0xc4/0x294
[    4.286762]  kobject_put from rproc_alloc.part.0+0x208/0x28c
[    4.292430]  rproc_alloc.part.0 from devm_rproc_alloc+0x80/0xc4
[    4.298393]  devm_rproc_alloc from stm32_rproc_probe+0xd0/0x844 [stm32_rproc]
[    4.305575]  stm32_rproc_probe [stm32_rproc] from platform_probe+0x5c/0xbc

Calling ida_alloc earlier in rproc_alloc ensures that the rproc->index is
properly set.

Fixes: 08333b911f ("remoteproc: Directly use ida_alloc()/free()")
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20241122175127.2188037-1-arnaud.pouliquen@foss.st.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-02-08 09:58:16 +01:00
arch hexagon: Fix unbalanced spinlock in die() 2025-02-08 09:58:11 +01:00
block partitions: ldm: remove the initial kernel-doc notation 2025-02-08 09:56:52 +01:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: api - Fix boot-up self-test race 2025-02-08 09:57:28 +01:00
Documentation crypto: iaa - Fix IAA disabling that occurs when sync_mode is set to 'async' 2025-02-08 09:57:30 +01:00
drivers remoteproc: core: Fix ida_free call while not allocated 2025-02-08 09:58:16 +01:00
fs xfs: don't shut down the filesystem for media failures beyond end of log 2025-02-08 09:58:13 +01:00
include usb: typec: tcpci: Prevent Sink disconnection before vPpsShutdown in SPR PPS 2025-02-08 09:58:15 +01:00
init Compiler Attributes: disable __counted_by for clang < 19.1.3 2024-12-05 14:02:45 +01:00
io_uring io_uring/uring_cmd: use cached cmd_op in io_uring_cmd_sock() 2025-02-08 09:58:10 +01:00
ipc ipc: fix memleak if msg_init_ns failed in create_ipc_ns 2024-12-05 14:03:02 +01:00
kernel PM: hibernate: Add error handling for syscore_suspend() 2025-02-08 09:58:03 +01:00
lib rhashtable: Fix rhashtable_try_insert test 2025-02-08 09:57:35 +01:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm cachestat: fix page cache statistics permission checking 2025-02-01 18:39:38 +01:00
net mptcp: blackhole only if 1st SYN retrans w/o MPC is accepted 2025-02-08 09:58:16 +01:00
rust rust: kbuild: set bindgen's Rust target version 2024-12-19 18:13:22 +01:00
samples samples/landlock: Fix possible NULL dereference in parse_path() 2025-02-08 09:57:11 +01:00
scripts kbuild: switch from lz4c to lz4 for compression 2025-02-08 09:58:12 +01:00
security landlock: Handle weird files 2025-02-08 09:57:16 +01:00
sound ALSA: usb-audio: Add delay quirk for iBasso DC07 Pro 2025-02-08 09:58:13 +01:00
tools ktest.pl: Check kernelrelease return in get_version 2025-02-08 09:58:13 +01:00
usr initramfs: shorten cmd_initfs in usr/Makefile 2024-07-16 01:07:52 +09:00
virt KVM: x86: switch hugepage recovery thread to vhost_task 2024-12-05 14:02:43 +01:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Kbuild updates for v6.12 2024-09-24 13:02:06 -07:00
.mailmap mailmap: add entry for Thorsten Blum 2024-11-07 14:14:59 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove self from DSA entry 2024-11-03 12:52:38 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: update location of media main tree 2024-12-05 14:02:42 +01:00
Makefile kbuild: switch from lz4c to lz4 for compression 2025-02-08 09:58:12 +01:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.