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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-04-24 10:53:17 +0300
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-05-13 19:23:55 +0300
commit1321657d8f843641529eff26e25722158cc29349 (patch)
treed3d0ad3cc1f8074f4ffb3a4700e63f0a15ee35c6 /fs/ubifs/debug.c
parent3b2f9a019e655f3407e4e69cdbaf8b75699b79a4 (diff)
UBIFS: fix oops in lprops dump function
The 'dbg_dump_lprop()' is trying to detect journal head LEBs when printing, so it looks at the write-buffers. However, if we are in R/O mode, we de-allocate the write-buffers, so 'dbg_dump_lprop()' oopses. This patch fixes the issue. Note, this patch is not critical, it is only about the debugging code path, and it is unlikely that anyone but UBIFS developers would ever hit this issue. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'fs/ubifs/debug.c')
-rw-r--r--fs/ubifs/debug.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index ba4d795d63a..4062ec60263 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -746,7 +746,13 @@ void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp)
if (bud->lnum == lp->lnum) {
int head = 0;
for (i = 0; i < c->jhead_cnt; i++) {
- if (lp->lnum == c->jheads[i].wbuf.lnum) {
+ /*
+ * Note, if we are in R/O mode or in the middle
+ * of mounting/re-mounting, the write-buffers do
+ * not exist.
+ */
+ if (c->jheads &&
+ lp->lnum == c->jheads[i].wbuf.lnum) {
printk(KERN_CONT ", jhead %s",
dbg_jhead(i));
head = 1;