From: Gabriel de Perthuis Date: Mon, 6 May 2013 17:40:18 +0000 (+0000) Subject: btrfs: don't stop searching after encountering the wrong item X-Git-Tag: v3.2.46~46 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d63f0b723b88be5e598795f0c2b1544d5bbc5def;p=people%2Fms%2Flinux.git 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 Signed-off-by: Josef Bacik Signed-off-by: Ben Hutchings --- diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index c04f02c7d5bb..618ae6f9fbe9 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -1571,7 +1571,11 @@ 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 > @@ -1580,10 +1584,6 @@ 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;