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Wolfram Sang bdba49e469 mmc: tmio: avoid concurrent runs of mmc_request_done() 
[ Upstream commit e8d1b41e69 ]

With the to-be-fixed commit, the reset_work handler cleared 'host->mrq'
outside of the spinlock protected critical section. That leaves a small
race window during execution of 'tmio_mmc_reset()' where the done_work
handler could grab a pointer to the now invalid 'host->mrq'. Both would
use it to call mmc_request_done() causing problems (see link below).

However, 'host->mrq' cannot simply be cleared earlier inside the
critical section. That would allow new mrqs to come in asynchronously
while the actual reset of the controller still needs to be done. So,
like 'tmio_mmc_set_ios()', an ERR_PTR is used to prevent new mrqs from
coming in but still avoiding concurrency between work handlers.

Reported-by: Dirk Behme <dirk.behme@de.bosch.com>
Closes: https://lore.kernel.org/all/20240220061356.3001761-1-dirk.behme@de.bosch.com/
Fixes: df3ef2d3c9 ("mmc: protect the tmio_mmc driver against a theoretical race")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Dirk Behme <dirk.behme@de.bosch.com>
Reviewed-by: Dirk Behme <dirk.behme@de.bosch.com>
Cc: stable@vger.kernel.org # 3.0+
Link: https://lore.kernel.org/r/20240305104423.3177-2-wsa+renesas@sang-engineering.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-04-03 15:19:30 +02:00
arch KVM: x86/xen: inject vCPU upcall vector when local APIC is enabled 2024-04-03 15:19:30 +02:00
block block: Clear zone limits for a non-zoned stacked queue 2024-04-03 15:19:27 +02:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-02-09 11:28:11 +01:00
crypto crypto: jitter - fix CRYPTO_JITTERENTROPY help text 2024-03-26 18:20:50 -04:00
Documentation media: mc: Expand MUST_CONNECT flag to always require an enabled link 2024-04-03 15:19:25 +02:00
drivers mmc: tmio: avoid concurrent runs of mmc_request_done() 2024-04-03 15:19:30 +02:00
fs ubifs: Set page uptodate in the correct place 2024-04-03 15:19:27 +02:00
include cpufreq: Limit resolving a frequency to policy min/max 2024-04-03 15:19:28 +02:00
init modules: wait do_free_init correctly 2024-03-26 18:20:52 -04:00
io_uring io_uring/net: correct the type of variable 2024-03-26 18:20:57 -04:00
ipc ipc: fix memory leak in init_mqueue_fs() 2022-12-31 13:32:01 +01:00
kernel PM: suspend: Set mem_sleep_current during kernel command line setup 2024-04-03 15:19:28 +02:00
lib pci_iounmap(): Fix MMIO mapping leak 2024-04-03 15:19:25 +02:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm kasan/test: avoid gcc warning for intentional overflow 2024-04-03 15:19:27 +02:00
net net: report RCU QS on threaded NAPI repolling 2024-03-26 18:21:02 -04:00
rust rust: allocator: Prevent mis-aligned allocation 2023-08-11 12:08:18 +02:00
samples work around gcc bugs with 'asm goto' with outputs 2024-02-23 09:12:28 +01:00
scripts kconfig: fix infinite loop when expanding a macro at the end of file 2024-03-26 18:20:58 -04:00
security smack: Handle SMACK64TRANSMUTE in smack_inode_setsecurity() 2024-04-03 15:19:24 +02:00
sound ASoC: rockchip: i2s-tdm: Fix inaccurate sampling rates 2024-03-26 18:20:58 -04:00
tools selftests/mqueue: Set timeout to 180 seconds 2024-04-03 15:19:26 +02:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt KVM: Always flush async #PF workqueue when vCPU is being destroyed 2024-04-03 15:19:25 +02:00
.clang-format inet: ping: use hlist_nulls rcu iterator during lookup 2022-12-01 12:42:46 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
.mailmap 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -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 Michal Marek from Kbuild maintainers 2022-11-16 14:53:00 +09:00
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 trace: Relocate event helper files 2024-03-06 14:45:17 +00:00
Makefile Linux 6.1.83 2024-03-26 18:22:57 -04:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -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 Restructured Text 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.