Messages in this thread Patch in this message | | | From | Kamal Mostafa <> | Subject | [PATCH 3.13.y-ckt 056/122] path_openat(): fix double fput() | Date | Wed, 17 Jun 2015 15:28:03 -0700 |
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3.13.11-ckt22 -stable review patch. If anyone has any objections, please let me know.
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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> [ luis: backported to 3.16: - adjusted context as 3.16 doesn't have path_cleanup() helper, introduced by 893b7775a70e ("fs/namei.c: new helper (path_cleanup())") ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> 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 f804083..5f6401d 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -3171,7 +3171,7 @@ 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 | LOOKUP_PARENT, nd, &base); @@ -3209,6 +3209,7 @@ out: path_put(&nd->root); if (base) fput(base); +out2: if (!(opened & FILE_OPENED)) { BUG_ON(!error); put_filp(file); -- 1.9.1
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