diff options
| author | Gabriel de Perthuis <g2p.code@gmail.com> | 2013-05-06 19:40:18 +0200 |
|---|---|---|
| committer | Josef Bacik <jbacik@fusionio.com> | 2013-05-18 03:40:10 +0200 |
| commit | 03b71c6ca6286625d8f1ed44aabab9b5bf5dac10 (patch) | |
| tree | 5b5b9c8b566c2e4853f8c43dc46e9a9313c6c442 | |
| parent | Btrfs: fix off-by-one in fiemap (diff) | |
| download | linux-03b71c6ca6286625d8f1ed44aabab9b5bf5dac10.tar.xz linux-03b71c6ca6286625d8f1ed44aabab9b5bf5dac10.zip | |
btrfs: don't stop searching after encountering the wrong item
The search ioctl skips items that are too large for a result buffer, but
inline items of a certain size occuring before any search result is
found would trigger an overflow and stop the search entirely.
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=57641
Cc: stable@vger.kernel.org
Signed-off-by: Gabriel de Perthuis <g2p.code+btrfs@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
| -rw-r--r-- | fs/btrfs/ioctl.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 0de4a2fcfb24..0f81d67cdc8d 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -1801,7 +1801,11 @@ static noinline int copy_to_sk(struct btrfs_root *root, item_off = btrfs_item_ptr_offset(leaf, i); item_len = btrfs_item_size_nr(leaf, i); - if (item_len > BTRFS_SEARCH_ARGS_BUFSIZE) + btrfs_item_key_to_cpu(leaf, key, i); + if (!key_in_sk(key, sk)) + continue; + + if (sizeof(sh) + item_len > BTRFS_SEARCH_ARGS_BUFSIZE) item_len = 0; if (sizeof(sh) + item_len + *sk_offset > @@ -1810,10 +1814,6 @@ static noinline int copy_to_sk(struct btrfs_root *root, goto overflow; } - btrfs_item_key_to_cpu(leaf, key, i); - if (!key_in_sk(key, sk)) - continue; - sh.objectid = key->objectid; sh.offset = key->offset; sh.type = key->type; |