From f6082ba9d2e0f3ba3cfcbdfdccdf2315e3698b8d Mon Sep 17 00:00:00 2001 From: Edward Tomasz Napierala Date: Sun, 31 Jan 2021 21:37:41 +0000 Subject: [PATCH] msdosfs: fix vnode leak with msdosfs_rename() This could happen when failing due to disappearing source file. Reviewed By: kib Tested by: pho Sponsored by: NetApp, Inc. Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D27338 (cherry picked from commit b8073b3c74342113398f36a1c68f442ae9e092e6) --- sys/fs/msdosfs/msdosfs_vnops.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/sys/fs/msdosfs/msdosfs_vnops.c b/sys/fs/msdosfs/msdosfs_vnops.c index e1e679d9214..8885ac85658 100644 --- a/sys/fs/msdosfs/msdosfs_vnops.c +++ b/sys/fs/msdosfs/msdosfs_vnops.c @@ -1122,6 +1122,14 @@ abortit: VOP_UNLOCK(tdvp); vrele(tdvp); vrele(ap->a_fvp); + /* + * fdvp may be locked and has a reference. We need to + * release the lock and reference, unless to and from + * directories are the same. In that case it is already + * unlocked. + */ + if (tdvp != fdvp) + vput(fdvp); return 0; } xp = VTODE(fvp);