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| author | Gabriel de Perthuis <g2p.code@gmail.com> | 2013-05-06 17:40:18 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-24 11:09:24 -0700 |
| commit | 3f9831881378bae530028b35a7a06c811441162d (patch) | |
| tree | f492b80862263a96c7a0a3f75ccedd74632fec7f /fs/btrfs | |
| parent | ae101a35196a14a8388b7db5f7ddd0b3cfdc5f99 (diff) | |
| download | kernel_samsung_tuna-3f9831881378bae530028b35a7a06c811441162d.zip kernel_samsung_tuna-3f9831881378bae530028b35a7a06c811441162d.tar.gz kernel_samsung_tuna-3f9831881378bae530028b35a7a06c811441162d.tar.bz2 | |
btrfs: don't stop searching after encountering the wrong item
commit 03b71c6ca6286625d8f1ed44aabab9b5bf5dac10 upstream.
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
Signed-off-by: Gabriel de Perthuis <g2p.code+btrfs@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/btrfs')
| -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 a3c4751..a205027 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -1539,7 +1539,11 @@ 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 > @@ -1548,10 +1552,6 @@ 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; |