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| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2011-03-29 09:45:21 +0300 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2011-04-05 10:45:09 +0300 |
| commit | c88ac00c5af70c2a0741da14b22cdcf8507ddd92 (patch) | |
| tree | 5561ff6e47406f58e71eda4700c5a3f2694c6f71 /fs/ubifs/super.c | |
| parent | 54acbaaa523ca0bd284a18f67ad213c379679e86 (diff) | |
| download | linux-c88ac00c5af70c2a0741da14b22cdcf8507ddd92.tar.bz2 | |
UBIFS: fix assertion warnings
This patch fixes UBIFS assertion warnings like:
UBIFS assert failed in ubifs_leb_unmap at 135 (pid 29365)
Pid: 29365, comm: integck Tainted: G I 2.6.37-ubi-2.6+ #34
Call Trace:
[<ffffffffa047c663>] ubifs_lpt_init+0x95e/0x9ee [ubifs]
[<ffffffffa04623a7>] ubifs_remount_fs+0x2c7/0x762 [ubifs]
[<ffffffff810f066e>] do_remount_sb+0xb6/0x101
[<ffffffff81106ff4>] ? do_mount+0x191/0x78e
[<ffffffff811070bb>] do_mount+0x258/0x78e
[<ffffffff810da1e8>] ? alloc_pages_current+0xa2/0xc5
[<ffffffff81107674>] sys_mount+0x83/0xbd
[<ffffffff81009a12>] system_call_fastpath+0x16/0x1b
They happen when we re-mount from R/O mode to R/W mode. While
re-mounting, we write to the media, but we still have the c->ro_mount
flag set. The fix is very simple - just clear the flag before
starting re-mounting R/W.
These warnings are caused by the following commit:
2ef13294d29bcfb306e0d360f1b97f37b647b0c0
For -stable guys: this bug was introduced in 2.6.38, this is materieal
for 2.6.38-stable.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Cc: stable@kernel.org [2.6.38]
Diffstat (limited to 'fs/ubifs/super.c')
| -rw-r--r-- | fs/ubifs/super.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 6ddd9973e681..c75f6133206c 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1568,6 +1568,7 @@ static int ubifs_remount_rw(struct ubifs_info *c) mutex_lock(&c->umount_mutex); dbg_save_space_info(c); c->remounting_rw = 1; + c->ro_mount = 0; err = check_free_space(c); if (err) @@ -1676,13 +1677,13 @@ static int ubifs_remount_rw(struct ubifs_info *c) } dbg_gen("re-mounted read-write"); - c->ro_mount = 0; c->remounting_rw = 0; err = dbg_check_space_info(c); mutex_unlock(&c->umount_mutex); return err; out: + c->ro_mount = 1; vfree(c->orph_buf); c->orph_buf = NULL; if (c->bgt) { |