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| author |   Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2019-08-12 11:16:11 +0900 |
|---|---|---|
| committer |   J. Bruce Fields <bfields@redhat.com> | 2019-08-15 14:53:00 -0400 |
| commit | d6846bfbeeac873d85f32bd2b988fa94c89dbcb8 (patch) | |
| tree | 6a25ba0ff6a531dff603b34e1f5c92c727210a06 /fs/nfsd | |
| parent | Linux 5.3-rc2 (diff) | |
| download | linux-dev-d6846bfbeeac873d85f32bd2b988fa94c89dbcb8.tar.xz linux-dev-d6846bfbeeac873d85f32bd2b988fa94c89dbcb8.zip | |
nfsd: fix dentry leak upon mkdir failure.
syzbot is reporting that nfsd_mkdir() forgot to remove dentry created by
d_alloc_name() when __nfsd_mkdir() failed (due to memory allocation fault
injection) [1].
[1] https://syzkaller.appspot.com/bug?id=ce41a1f769ea4637ebffedf004a803e8405b4674
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+2c95195d5d433f6ed6cb@syzkaller.appspotmail.com>
Fixes: e8a79fb14f6b76b5 ("nfsd: add nfsd/clients directory")
[bfields: clean up in nfsd_mkdir instead of __nfsd_mkdir]
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfsctl.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 13c548733860..928a0b2c05dc 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -1205,6 +1205,7 @@ out: inode_unlock(dir); return dentry; out_err: + dput(dentry); dentry = ERR_PTR(ret); goto out; } |