From 72d622b42258a0ed0b6e8c0f40d7628de935d058 Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Sun, 30 Apr 2017 20:08:05 -0400 Subject: [PATCH] ext4: replace BUG_ON with WARN_ONCE in ext4_end_bio() Add fallback code and a WARN_ONCE() call instead of a BUG_ON() in the ext4_end_bio() function. Signed-off-by: Theodore Ts'o --- fs/ext4/page-io.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 208241b..1a82138 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -297,8 +297,17 @@ static void ext4_end_bio(struct bio *bio) { ext4_io_end_t *io_end = bio->bi_private; sector_t bi_sector = bio->bi_iter.bi_sector; + char b[BDEVNAME_SIZE]; - BUG_ON(!io_end); + if (WARN_ONCE(!io_end, "io_end is NULL: %s: sector %Lu len %u err %d\n", + bdevname(bio->bi_bdev, b), + (long long) bio->bi_iter.bi_sector, + (unsigned) bio_sectors(bio), + bio->bi_error)) { + ext4_finish_bio(bio); + bio_put(bio); + return; + } bio->bi_end_io = NULL; if (bio->bi_error) { -- 2.7.4