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| author | Johannes Thumshirn <johannes.thumshirn@wdc.com> | 2023-05-04 14:58:13 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-05-17 14:08:28 +0300 |
| commit | 806570c0bb7b4847828c22c4934fcf2dc8fc572f (patch) | |
| tree | 4d06b65133912bdcc94d4a5f8ab530fb057abe27 /fs | |
| parent | 7561551e7ba870b9659083b95feb520fb2dacce3 (diff) | |
| download | linux-806570c0bb7b4847828c22c4934fcf2dc8fc572f.tar.xz | |
btrfs: handle memory allocation failure in btrfs_csum_one_bio
Since f8a53bb58ec7 ("btrfs: handle checksum generation in the storage
layer") the failures of btrfs_csum_one_bio() are handled via
bio_end_io().
This means, we can return BLK_STS_RESOURCE from btrfs_csum_one_bio() in
case the allocation of the ordered sums fails.
This also fixes a syzkaller report, where injecting a failure into the
kvzalloc() call results in a BUG_ON().
Reported-by: syzbot+d8941552e21eac774778@syzkaller.appspotmail.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/file-item.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index cd4cce9ba443..d1cd0a692f8e 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -792,7 +792,9 @@ blk_status_t btrfs_csum_one_bio(struct btrfs_bio *bbio) sums = kvzalloc(btrfs_ordered_sum_size(fs_info, bytes_left), GFP_KERNEL); memalloc_nofs_restore(nofs_flag); - BUG_ON(!sums); /* -ENOMEM */ + if (!sums) + return BLK_STS_RESOURCE; + sums->len = bytes_left; ordered = btrfs_lookup_ordered_extent(inode, offset); |