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| author | Chris Mason | 2017-06-23 18:48:21 +0200 |
|---|---|---|
| committer | David Sterba | 2017-06-29 20:17:02 +0200 |
| commit | 6374e57ad8091b9c2db2eecc536c7f0166ce099e (patch) | |
| tree | f4a5c584983c110e0b2ddc9e3b51c25e11801353 /fs/btrfs/super.c | |
| parent | btrfs: scrub: fix target device intialization while setting up scrub context (diff) | |
| download | kernel-qcow2-linux-6374e57ad8091b9c2db2eecc536c7f0166ce099e.tar.gz kernel-qcow2-linux-6374e57ad8091b9c2db2eecc536c7f0166ce099e.tar.xz kernel-qcow2-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/super.c')
| -rw-r--r-- | fs/btrfs/super.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index ba2cb7f96986..74e47794e63f 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1177,7 +1177,7 @@ int btrfs_sync_fs(struct super_block *sb, int wait) return 0; } - btrfs_wait_ordered_roots(fs_info, -1, 0, (u64)-1); + btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1); trans = btrfs_attach_transaction_barrier(root); if (IS_ERR(trans)) { |