From: Hugh Dickins Date: Thu, 7 Dec 2006 04:41:25 +0000 (-0800) Subject: [PATCH] ext3 balloc: fix off-by-one against grp_goal X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1650242324a0c19d629a8be0d5a8ecdc174d31f8;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git [PATCH] ext3 balloc: fix off-by-one against grp_goal grp_goal 0 is a genuine goal (unlike -1), so ext3_try_to_allocate_with_rsv should treat it as such. Signed-off-by: Mingming Cao Signed-off-by: Hugh Dickins Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c index db8ca34d102a..0706a45d3c07 100644 --- a/fs/ext3/balloc.c +++ b/fs/ext3/balloc.c @@ -1271,7 +1271,7 @@ ext3_try_to_allocate_with_rsv(struct super_block *sb, handle_t *handle, } /* * grp_goal is a group relative block number (if there is a goal) - * 0 < grp_goal < EXT3_BLOCKS_PER_GROUP(sb) + * 0 <= grp_goal < EXT3_BLOCKS_PER_GROUP(sb) * first block is a filesystem wide block number * first block is the block number of the first block in this group */ @@ -1307,7 +1307,7 @@ ext3_try_to_allocate_with_rsv(struct super_block *sb, handle_t *handle, if (!goal_in_my_reservation(&my_rsv->rsv_window, grp_goal, group, sb)) grp_goal = -1; - } else if (grp_goal > 0) { + } else if (grp_goal >= 0) { int curr = my_rsv->rsv_end - (grp_goal + group_first_block) + 1;