This is a note to let you know that I've just added the patch titled
btrfs: don't stop searching after encountering the wrong item
to the 3.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-don-t-stop-searching-after-encountering-the-wrong-item.patch
and it can be found in the queue-3.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 03b71c6ca6286625d8f1ed44aabab9b5bf5dac10 Mon Sep 17 00:00:00 2001
From: Gabriel de Perthuis <g2p.code@xxxxxxxxx>
Date: Mon, 6 May 2013 17:40:18 +0000
Subject: btrfs: don't stop searching after encountering the wrong item
From: Gabriel de Perthuis <g2p.code@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Josef Bacik <jbacik@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/ioctl.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1796,7 +1796,11 @@ static noinline int copy_to_sk(struct bt
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 >
@@ -1805,10 +1809,6 @@ static noinline int copy_to_sk(struct bt
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;
Patches currently in stable-queue which might be from g2p.code@xxxxxxxxx are
queue-3.9/btrfs-don-t-stop-searching-after-encountering-the-wrong-item.patch
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