proc: change ->nlink under proc_subdir_lock

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Currently gluing PDE into global /proc tree is done under lock, but
changing ->nlink is not.  Additionally struct proc_dir_entry::nlink is
not atomic so updates can be lost.

Link: http://lkml.kernel.org/r/20190925202436.GA17388@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Alexey Dobriyan 2019-12-04 16:49:59 -08:00 • committed by Linus Torvalds

parent 3cde287bb4

commit e06689bf57

1 changed files with 15 additions and 16 deletions

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31

fs/proc/generic.c

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