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| author | Steven Rostedt <rostedt@goodmis.org> | 2026-09-02 09:55:01 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2026-09-02 11:08:21 -0400 |
| commit | 4617721c502b2ddaa4e324e86da4997edf738fa5 (patch) | |
| tree | 350aa83b47da0b574a814795392b20b0bed83cbc /drivers/crypto/stm32/Kconfig | |
| download | linux-stable-4617721c502b2ddaa4e324e86da4997edf738fa5.tar.gz linux-stable-4617721c502b2ddaa4e324e86da4997edf738fa5.zip | |
ftrace: Synchronize the initialization of ftrace_opsgrafted
There's some internal state that ftrace_ops needs to have set, but since
it can be declared outside of the ftrace.c code, it calls
ftrace_ops_init() on the ops in every global function. The issue is that
if two tasks call it on the same ops at the same time it is possible to
have the initialization of one corrupt the initialization of the other
call.
Create a ops_mutex to use to synchronize every initialization of the
ftrace_ops. The mutex is taken within checking the ftrace_ops flag that
states it was initializied but the flag is checked again after the mutex
has been taken. Checking first outside the mutex allows it to shortcut
having to take the mutex. But then the check needs to be done again after
the mute is taken in case of races.
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home
Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock")
Reported-by: sashiko-bot@kernel.org
Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'drivers/crypto/stm32/Kconfig')
| -rw-r--r-- | drivers/crypto/stm32/Kconfig | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/crypto/stm32/Kconfig b/drivers/crypto/stm32/Kconfig new file mode 100644 index 000000000..d6dc848c8 --- /dev/null +++ b/drivers/crypto/stm32/Kconfig @@ -0,0 +1,25 @@ +# SPDX-License-Identifier: GPL-2.0-only +config CRYPTO_DEV_STM32_HASH + tristate "Support for STM32 hash accelerators" + depends on ARCH_STM32 || ARCH_U8500 + depends on HAS_DMA + select CRYPTO_HASH + select CRYPTO_MD5 + select CRYPTO_SHA1 + select CRYPTO_SHA256 + select CRYPTO_SHA512 + select CRYPTO_SHA3 + select CRYPTO_ENGINE + help + This enables support for the HASH hw accelerator which can be found + on STMicroelectronics STM32 SOC. + +config CRYPTO_DEV_STM32_CRYP + tristate "Support for STM32 cryp accelerators" + depends on ARCH_STM32 || ARCH_U8500 + select CRYPTO_HASH + select CRYPTO_ENGINE + select CRYPTO_LIB_DES + help + This enables support for the CRYP (AES/DES/TDES) hw accelerator which + can be found on STMicroelectronics STM32 SOC. |