Commit 1321657d authored Apr 24, 2011 by Artem Bityutskiy

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>

parent 3b2f9a01

fs/ubifs/debug.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -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;