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Subject[PATCH 3.19.y-ckt 78/92] path_openat(): fix double fput()
Date
3.19.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Al Viro <viro@zeniv.linux.org.uk>

commit f15133df088ecadd141ea1907f2c96df67c729f0 upstream.

path_openat() jumps to the wrong place after do_tmpfile() - it has
already done path_cleanup() (as part of path_lookupat() called by
do_tmpfile()), so doing that again can lead to double fput().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
fs/namei.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/namei.c b/fs/namei.c
index 3abfbda..b4d2182 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3209,7 +3209,7 @@ static struct file *path_openat(int dfd, struct filename *pathname,

if (unlikely(file->f_flags & __O_TMPFILE)) {
error = do_tmpfile(dfd, pathname, nd, flags, op, file, &opened);
- goto out;
+ goto out2;
}

error = path_init(dfd, pathname->name, flags, nd);
@@ -3239,6 +3239,7 @@ static struct file *path_openat(int dfd, struct filename *pathname,
}
out:
path_cleanup(nd);
+out2:
if (!(opened & FILE_OPENED)) {
BUG_ON(!error);
put_filp(file);
--
1.9.1


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