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| author | Chris Mason <clm@fb.com> | 2017-06-23 09:48:21 -0700 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-06-29 20:17:02 +0200 |
| commit | 6374e57ad8091b9c2db2eecc536c7f0166ce099e (patch) | |
| tree | f4a5c584983c110e0b2ddc9e3b51c25e11801353 /fs/btrfs/qgroup.c | |
| parent | ded56184a562b925a588b6e78688e2e60757b425 (diff) | |
| download | linux-6374e57ad8091b9c2db2eecc536c7f0166ce099e.tar.gz linux-6374e57ad8091b9c2db2eecc536c7f0166ce099e.tar.bz2 linux-6374e57ad8091b9c2db2eecc536c7f0166ce099e.zip | |
btrfs: fix integer overflow in calc_reclaim_items_nr
Dave Jones hit a WARN_ON(nr < 0) in btrfs_wait_ordered_roots() with
v4.12-rc6. This was because commit 70e7af244 made it possible for
calc_reclaim_items_nr() to return a negative number. It's not really a
bug in that commit, it just didn't go far enough down the stack to find
all the possible 64->32 bit overflows.
This switches calc_reclaim_items_nr() to return a u64 and changes everyone
that uses the results of that math to u64 as well.
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Fixes: 70e7af2 ("Btrfs: fix delalloc accounting leak caused by u32 overflow")
Signed-off-by: Chris Mason <clm@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/qgroup.c')
| -rw-r--r-- | fs/btrfs/qgroup.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index fc9dffaa9524..4ce351efe281 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -2405,7 +2405,7 @@ retry: ret = btrfs_start_delalloc_inodes(root, 0); if (ret) return ret; - btrfs_wait_ordered_extents(root, -1, 0, (u64)-1); + btrfs_wait_ordered_extents(root, U64_MAX, 0, (u64)-1); trans = btrfs_join_transaction(root); if (IS_ERR(trans)) return PTR_ERR(trans); |