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proc: Fix unbalanced hard link numbers

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commit d66bb1607e2d8d384e53f3d93db5c18483c8c4f7 upstream.

proc_create_mount_point() forgot to increase the parent's nlink, and
it resulted in unbalanced hard link numbers, e.g. /proc/fs shows one
less than expected.

Fixes: eb6d38d5427b ("proc: Allow creating permanently empty directories...")
Reported-by: Tristan Ye <tristan.ye@suse.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2017-04-28 15:00:15 +02:00 committed by Greg Kroah-Hartman
parent 168b2bfaa2
commit d10b21d6e5
1 changed files with 1 additions and 0 deletions
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1
fs/proc/generic.c
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@ -471,6 +471,7 @@ struct proc_dir_entry *proc_create_mount_point(const char *name)
ent->data = NULL;
ent->proc_fops = NULL;
ent->proc_iops = NULL;
parent->nlink++;
if (proc_register(parent, ent) < 0) {
kfree(ent);
parent->nlink--;