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Subject[PATCH] procfs: Fix refcnt leak on proc_self_follow_link() error path
Date

If ->follow_link handler return the error, it should decrement
nd->path refcnt.

This patch fix it.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
---

fs/proc/base.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff -puN fs/proc/base.c~namei-procfs-follow_link-fix fs/proc/base.c
--- linux-2.6/fs/proc/base.c~namei-procfs-follow_link-fix 2010-01-12 00:15:15.000000000 +0900
+++ linux-2.6-hirofumi/fs/proc/base.c 2010-01-12 00:15:15.000000000 +0900
@@ -2371,8 +2371,10 @@ static void *proc_self_follow_link(struc
struct pid_namespace *ns = dentry->d_sb->s_fs_info;
pid_t tgid = task_tgid_nr_ns(current, ns);
char tmp[PROC_NUMBUF];
- if (!tgid)
+ if (!tgid) {
+ path_put(&nd->path);
return ERR_PTR(-ENOENT);
+ }
sprintf(tmp, "%d", task_tgid_nr_ns(current, ns));
return ERR_PTR(vfs_follow_link(nd,tmp));
}
_
--
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>


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