From bbe1426764e5dfaa57e7b12cc954acdb3fb7f94b Mon Sep 17 00:00:00 2001 From: Miao Xie Date: Thu, 1 Nov 2012 07:34:54 +0000 Subject: [PATCH] Btrfs: fix unprotected extent map operation when logging file extents We forget to protect the modified_extents list, fix it. Signed-off-by: Miao Xie Reviewed-by: Liu Bo Signed-off-by: Chris Mason --- fs/btrfs/tree-log.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index bcf0e48b1932..d1947af67bcd 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -3526,8 +3526,10 @@ next_slot: struct extent_map_tree *tree = &BTRFS_I(inode)->extent_tree; struct extent_map *em, *n; + write_lock(&tree->lock); list_for_each_entry_safe(em, n, &tree->modified_extents, list) list_del_init(&em->list); + write_unlock(&tree->lock); } if (inode_only == LOG_INODE_ALL && S_ISDIR(inode->i_mode)) { -- 2.30.2