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| author | John Ogness <[email protected]> | 2024-02-07 13:41:03 +0000 |
|---|---|---|
| committer | Petr Mladek <[email protected]> | 2024-02-07 16:23:19 +0000 |
| commit | 7412dc6d55eed6b76180e40ac3601412ebde29bd (patch) | |
| tree | 3cb98e9f442a2c06d0d8005248a3a9841730d5e7 /security/selinux/hooks.c | |
| parent | panic: Flush kernel log buffer at the end (diff) | |
| download | kernel-7412dc6d55eed6b76180e40ac3601412ebde29bd.tar.gz kernel-7412dc6d55eed6b76180e40ac3601412ebde29bd.zip | |
dump_stack: Do not get cpu_sync for panic CPU
dump_stack() is called in panic(). If for some reason another CPU
is holding the printk_cpu_sync and is unable to release it, the
panic CPU will be unable to continue and print the stacktrace.
Since non-panic CPUs are not allowed to store new printk messages
anyway, there is no need to synchronize the stacktrace output in
a panic situation.
For the panic CPU, do not get the printk_cpu_sync because it is
not needed and avoids a potential deadlock scenario in panic().
Link: https://lore.kernel.org/lkml/ZcIGKU8sxti38Kok@alley
Signed-off-by: John Ogness <[email protected]>
Reviewed-by: Petr Mladek <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Petr Mladek <[email protected]>
Diffstat (limited to 'security/selinux/hooks.c')
0 files changed, 0 insertions, 0 deletions