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(parent: db0c0cd) | patch
proc: change ->nlink under proc_subdir_lock
authorAlexey Dobriyan <adobriyan@gmail.com>
Thu, 5 Dec 2019 00:49:59 +0000 (16:49 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 5 Dec 2019 03:44:11 +0000 (19:44 -0800)
commitd3a4ebc3221c3d168153bae398ceaf6f2058dfd4
treeaa9df3db0c69d35019a5436fb78e205d53e8e7e3tree | snapshot
parentdb0c0cd0df69f8eb3a5d599f42985c29e1ca00b3commit | diff
proc: change ->nlink under proc_subdir_lock

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>
fs/proc/generic.c diff | blob | history
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