From 7d1c520bb57e4b5e94ec937c13553dccf473341b Mon Sep 17 00:00:00 2001 From: Hugh Dickins Date: Wed, 6 Dec 2006 20:41:30 -0800 Subject: [PATCH] [PATCH] ext3 balloc: fix _with_rsv freeze Port fix to the off-by-one in find_next_usable_block's memscan from ext2 to ext3; but it didn't cause a serious problem for ext3 because the additional ext3_test_allocatable check rescued it from the error. Signed-off-by: Mingming Cao Signed-off-by: Hugh Dickins Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/ext3/balloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c index 5a2c198762..22161740ba 100644 --- a/fs/ext3/balloc.c +++ b/fs/ext3/balloc.c @@ -730,7 +730,7 @@ find_next_usable_block(ext3_grpblk_t start, struct buffer_head *bh, here = 0; p = ((char *)bh->b_data) + (here >> 3); - r = memscan(p, 0, (maxblocks - here + 7) >> 3); + r = memscan(p, 0, ((maxblocks + 7) >> 3) - (here >> 3)); next = (r - ((char *)bh->b_data)) << 3; if (next < maxblocks && next >= start && ext3_test_allocatable(next, bh)) -- 2.39.5