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authorColy Li <colyli@suse.de>2023-12-24 03:28:20 +0300
committerJens Axboe <axboe@kernel.dk>2023-12-24 04:38:08 +0300
commit146e843f6b09271233c021b1677e561b7dc16303 (patch)
tree90929cf39bc52a763c6eb450499498d82f16ecfb /block
parent13d822bf1cba78612b22a65b91cd6d4d443b6254 (diff)
downloadlinux-146e843f6b09271233c021b1677e561b7dc16303.tar.xz
badblocks: avoid checking invalid range in badblocks_check()
If prev_badblocks() returns '-1', it means no valid badblocks record before the checking range. It doesn't make sense to check whether the input checking range is overlapped with the non-existed invalid front range. This patch checkes whether 'prev >= 0' is true before calling overlap_front(), to void such invalid operations. Fixes: 3ea3354cb9f0 ("badblocks: improve badblocks_check() for multiple ranges handling") Reported-and-tested-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Coly Li <colyli@suse.de> Link: https://lore.kernel.org/nvdimm/3035e75a-9be0-4bc3-8d4a-6e52c207f277@leemhuis.info/ Cc: Dan Williams <dan.j.williams@intel.com> Cc: Geliang Tang <geliang.tang@suse.com> Cc: Hannes Reinecke <hare@suse.de> Cc: Jens Axboe <axboe@kernel.dk> Cc: NeilBrown <neilb@suse.de> Cc: Vishal L Verma <vishal.l.verma@intel.com> Cc: Xiao Ni <xni@redhat.com> Link: https://lore.kernel.org/r/20231224002820.20234-1-colyli@suse.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/badblocks.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/block/badblocks.c b/block/badblocks.c
index fc92d4e18aa3..db4ec8b9b2a8 100644
--- a/block/badblocks.c
+++ b/block/badblocks.c
@@ -1312,12 +1312,14 @@ re_check:
prev = prev_badblocks(bb, &bad, hint);
/* start after all badblocks */
- if ((prev + 1) >= bb->count && !overlap_front(bb, prev, &bad)) {
+ if ((prev >= 0) &&
+ ((prev + 1) >= bb->count) && !overlap_front(bb, prev, &bad)) {
len = sectors;
goto update_sectors;
}
- if (overlap_front(bb, prev, &bad)) {
+ /* Overlapped with front badblocks record */
+ if ((prev >= 0) && overlap_front(bb, prev, &bad)) {
if (BB_ACK(p[prev]))
acked_badblocks++;
else