Commit ff331054 authored Mar 10, 2020 by Dmitry Monakhov Committed by Greg Kroah-Hartman Oct 01, 2020

ext4: mark block bitmap corrupted when found instead of BUGON

[ Upstream commit eb5760863fc28feab28b567ddcda7e667e638da0 ]

We already has similar code in ext4_mb_complex_scan_group(), but
ext4_mb_simple_scan_group() still affected.

Other reports: https://www.spinics.net/lists/linux-ext4/msg60231.html



Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Dmitry Monakhov <dmonakhov@gmail.com>
Link: https://lore.kernel.org/r/20200310150156.641-1-dmonakhov@gmail.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 7fff3f7f

fs/ext4/mballoc.c

+9 −2

Original line number	Diff line number	Diff line
		@@ -1901,8 +1901,15 @@ void ext4_mb_simple_scan_group(struct ext4_allocation_context *ac,
		BUG_ON(buddy == NULL);

		k = mb_find_next_zero_bit(buddy, max, 0);
		BUG_ON(k >= max);

		if (k >= max) {
		ext4_grp_locked_error(ac->ac_sb, e4b->bd_group, 0, 0,
		"%d free clusters of order %d. But found 0",
		grp->bb_counters[i], i);
		ext4_mark_group_bitmap_corrupted(ac->ac_sb,
		e4b->bd_group,
		EXT4_GROUP_INFO_BBITMAP_CORRUPT);
		break;
		}
		ac->ac_found++;

		ac->ac_b_ex.fe_len = 1 << i;