| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.11 066/197] proc: Fix unbalanced hard link numbers | Date | Tue, 23 May 2017 22:07:07 +0200 |
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4.11-stable review patch. If anyone has any objections, please let me know.
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From: Takashi Iwai <tiwai@suse.de>
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>
--- fs/proc/generic.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/proc/generic.c +++ b/fs/proc/generic.c @@ -472,6 +472,7 @@ struct proc_dir_entry *proc_create_mount ent->data = NULL; ent->proc_fops = NULL; ent->proc_iops = NULL; + parent->nlink++; if (proc_register(parent, ent) < 0) { kfree(ent); parent->nlink--;
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