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bcachefs: Fix b->written overflow

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When bset past end of btree node, we should not add sectors to
b->written, which will overflow b->written.

Reported-by: syzbot+3cb3d9e8c3f197754825@syzkaller.appspotmail.com
Tested-by: syzbot+3cb3d9e8c3f197754825@syzkaller.appspotmail.com
Signed-off-by: Alan Huang <mmpgouride@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Alan Huang
2025-03-08 00:58:27 +08:00
committed by Kent Overstreet
parent 80e54e8491
commit 3a04334d62
1 changed files with 1 additions and 1 deletions
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2
fs/bcachefs/btree_io.c
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@@ -1186,7 +1186,7 @@ int bch2_btree_node_read_done(struct bch_fs *c, struct bch_dev *ca,
le64_to_cpu(i->journal_seq),
b->written, b->written + sectors, ptr_written);
b->written += sectors;
b->written = min(b->written + sectors, btree_sectors(c));
if (blacklisted && !first)
continue;