* [PATCH] btrfs: prevent RCU warning when dereferencing radix tree slot
@ 2014-06-11 16:00 Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2014-06-11 16:00 UTC (permalink / raw)
To: clm, jbacik; +Cc: linux-btrfs, linux-kernel, Sasha Levin
Mark the dereference as protected by lock. Not doing so triggers
an RCU warning since the radix tree assumed that RCU is in use.
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
---
fs/btrfs/tests/btrfs-tests.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/btrfs/tests/btrfs-tests.c b/fs/btrfs/tests/btrfs-tests.c
index a5dcacb..9626252 100644
--- a/fs/btrfs/tests/btrfs-tests.c
+++ b/fs/btrfs/tests/btrfs-tests.c
@@ -135,7 +135,7 @@ restart:
radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter, 0) {
struct extent_buffer *eb;
- eb = radix_tree_deref_slot(slot);
+ eb = radix_tree_deref_slot_protected(slot, &fs_info->buffer_lock);
if (!eb)
continue;
/* Shouldn't happen but that kind of thinking creates CVE's */
--
1.7.10.4
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2014-06-11 16:00 [PATCH] btrfs: prevent RCU warning when dereferencing radix tree slot Sasha Levin
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