This is a note to let you know that I've just added the patch titled
pstore: Make sure CONFIG_PSTORE_PMSG selects CONFIG_RT_MUTEXES
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pstore-make-sure-config_pstore_pmsg-selects-config_r.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 06fc79f71d636504fbe46ecfb47eef4ca5dce8ae
Author: John Stultz <jstultz@xxxxxxxxxx>
Date: Wed Dec 21 05:18:55 2022 +0000
pstore: Make sure CONFIG_PSTORE_PMSG selects CONFIG_RT_MUTEXES
[ Upstream commit 2f4fec5943407318b9523f01ce1f5d668c028332 ]
In commit 76d62f24db07 ("pstore: Switch pmsg_lock to an rt_mutex
to avoid priority inversion") I changed a lock to an rt_mutex.
However, its possible that CONFIG_RT_MUTEXES is not enabled,
which then results in a build failure, as the 0day bot detected:
https://lore.kernel.org/linux-mm/202212211244.TwzWZD3H-lkp@xxxxxxxxx/
Thus this patch changes CONFIG_PSTORE_PMSG to select
CONFIG_RT_MUTEXES, which ensures the build will not fail.
Cc: Wei Wang <wvw@xxxxxxxxxx>
Cc: Midas Chien<midaschieh@xxxxxxxxxx>
Cc: Connor O'Brien <connoro@xxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Anton Vorontsov <anton@xxxxxxxxxx>
Cc: Colin Cross <ccross@xxxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: kernel test robot <lkp@xxxxxxxxx>
Cc: kernel-team@xxxxxxxxxxx
Fixes: 76d62f24db07 ("pstore: Switch pmsg_lock to an rt_mutex to avoid priority inversion")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: John Stultz <jstultz@xxxxxxxxxx>
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20221221051855.15761-1-jstultz@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig
index 8adabde685f1..c49d554cc9ae 100644
--- a/fs/pstore/Kconfig
+++ b/fs/pstore/Kconfig
@@ -126,6 +126,7 @@ config PSTORE_CONSOLE
config PSTORE_PMSG
bool "Log user space messages"
depends on PSTORE
+ select RT_MUTEXES
help
When the option is enabled, pstore will export a character
interface /dev/pmsg0 to log user space messages. On reboot
