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| author | Nikolay Borisov <nborisov@suse.com> | 2017-07-11 16:55:51 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-08-16 16:12:02 +0200 |
| commit | 69f03f137a1cb1a5215bc9e64597bfdfcdf22fde (patch) | |
| tree | ad1f99857cd90e5ba7372d0113d20b8cc3f330f7 /fs/tracefs | |
| parent | 1174cade8182b4136c8a162342bf7e8eba7200de (diff) | |
| download | linux-69f03f137a1cb1a5215bc9e64597bfdfcdf22fde.tar.gz linux-69f03f137a1cb1a5215bc9e64597bfdfcdf22fde.tar.bz2 linux-69f03f137a1cb1a5215bc9e64597bfdfcdf22fde.zip | |
btrfs: Prevent possible ERR_PTR() dereference
In btrfs_full_stripe_len/btrfs_is_parity_mirror we have similar code which
gets the chunk map for a particular range via get_chunk_map. However,
get_chunk_map can return an ERR_PTR value and while the 2 callers do catch
this with a WARN_ON they then proceed to indiscriminately dereference the
extent map. This of course leads to a crash. Fix the offenders by making the
dereference conditional on IS_ERR.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/tracefs')
0 files changed, 0 insertions, 0 deletions