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| author | Chris Mason <chris.mason@oracle.com> | 2009-09-23 20:23:16 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2009-09-23 20:30:52 -0400 |
| commit | 46562cec98368623bcd18d7fd30f20c04afd5978 (patch) | |
| tree | 4e5bbba7f459a1094b09413f65239b26401117f8 /fs | |
| parent | 42daec299b8b6b9605976d0ee1266b343a31cbcc (diff) | |
| download | linux-0-day-46562cec98368623bcd18d7fd30f20c04afd5978.tar.gz linux-0-day-46562cec98368623bcd18d7fd30f20c04afd5978.tar.xz | |
Btrfs: Fix test_range_bit for whole file extents
If test_range_bit finds an extent that goes all the way to (u64)-1, it
can incorrectly wrap the u64 instead of treaing it like the end of
the address space.
This just adds a check for the highest possible offset so we don't wrap.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/extent_io.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index b9506548853b2..dcce98d0ec4f8 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1564,6 +1564,10 @@ int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, bitset = 0; break; } + + if (state->end == (u64)-1) + break; + start = state->end + 1; if (start > end) break; |