From 538042801a479ebd316582ad10a9c3156b5b7548 Mon Sep 17 00:00:00 2001 From: Jeff Mahoney Date: Thu, 1 Mar 2012 14:56:28 +0100 Subject: [PATCH] btrfs: avoid NULL deref in btrfs_reserve_extent with DEBUG_ENOSPC __find_space_info can return NULL but we don't check it before calling dump_space_info(). Signed-off-by: Jeff Mahoney --- fs/btrfs/extent-tree.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 37e0a800d34..c32a9bffe9e 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -5838,7 +5838,8 @@ again: printk(KERN_ERR "btrfs allocation failed flags %llu, " "wanted %llu\n", (unsigned long long)data, (unsigned long long)num_bytes); - dump_space_info(sinfo, num_bytes, 1); + if (sinfo) + dump_space_info(sinfo, num_bytes, 1); } } -- 2.39.5