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| author | kib <kib@FreeBSD.org> | 2006-08-21 17:20:19 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2006-08-21 17:20:19 +0000 |
| commit | 6b3e18253177a17fcd1083cebac69ea449b55a57 (patch) | |
| tree | d9b2f5c25edfb53138f127cbfef320fa69d41521 /sys/ufs/ffs | |
| parent | 1e80c6d4b6d3c03b582b475466f209323388598a (diff) | |
| download | FreeBSD-src-6b3e18253177a17fcd1083cebac69ea449b55a57.zip FreeBSD-src-6b3e18253177a17fcd1083cebac69ea449b55a57.tar.gz | |
While checking for update of snapshot file in the ffs_copyonwrite,
first filter out metadata update. Otherwise, devfs vnode could be
erronously interpreted as ufs one, causing further check of i_flags
to use random memory.
PR: kern/100365
Debugged and fix described by: tegge
Approved by: pjd (mentor)
MFC after: 2 weeks
Diffstat (limited to 'sys/ufs/ffs')
| -rw-r--r-- | sys/ufs/ffs/ffs_snapshot.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/ufs/ffs/ffs_snapshot.c b/sys/ufs/ffs/ffs_snapshot.c index 79afa44..b183569 100644 --- a/sys/ufs/ffs/ffs_snapshot.c +++ b/sys/ufs/ffs/ffs_snapshot.c @@ -2091,7 +2091,7 @@ ffs_copyonwrite(devvp, bp) int launched_async_io, prev_norunningbuf; long saved_runningbufspace; - if ((VTOI(bp->b_vp)->i_flags & SF_SNAPSHOT) != 0) + if (devvp != bp->b_vp && (VTOI(bp->b_vp)->i_flags & SF_SNAPSHOT) != 0) return (0); /* Update on a snapshot file */ if (td->td_pflags & TDP_COWINPROGRESS) panic("ffs_copyonwrite: recursive call"); |
