pidfd: Use new infrastructure to fix deadlocks in execve

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This changes __pidfd_fget to use the new exec_update_mutex
instead of cred_guard_mutex.

This should be safe, as the credentials do not change
before exec_update_mutex is locked.  Therefore whatever
file access is possible with holding the cred_guard_mutex
here is also possbile with the exec_update_mutex.

Signed-off-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

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Bernd Edlinger 2020-03-21 02:46:16 +00:00 • committed by Eric W. Biederman

parent 6914303824

commit 501f9328bf

1 changed files with 2 additions and 2 deletions

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kernel/pid.c

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