btrfs: fix memory leak in btrfs_defrag_file
kmemleak found this:
unreferenced object 0xffff8801b64af968 (size 512):
comm "btrfs-cleaner", pid 3317, jiffies 4306810886 (age 903.272s)
hex dump (first 32 bytes):
00 82 01 07 00 ea ff ff c0 83 01 07 00 ea ff ff ................
80 82 01 07 00 ea ff ff c0 87 01 07 00 ea ff ff ................
backtrace:
[<ffffffff816875cc>] kmemleak_alloc+0x5c/0xc0
[<ffffffff8114aec3>] kmem_cache_alloc_trace+0x163/0x240
[<ffffffff8127a290>] btrfs_defrag_file+0xf0/0xb20
[<ffffffff8125d9a5>] btrfs_run_defrag_inodes+0x165/0x210
[<ffffffff812479d7>] cleaner_kthread+0x177/0x190
[<ffffffff81075c7d>] kthread+0x8d/0xa0
[<ffffffff816af5f4>] kernel_thread_helper+0x4/0x10
[<ffffffffffffffff>] 0xffffffffffffffff
"pages" is not always freed. Fix it removing the unnecesary additional return.
Signed-off-by: Diego Calleja <diegocg@gmail.com>
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index d2b53eb..8ccc106 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1140,9 +1140,7 @@
btrfs_set_super_incompat_flags(disk_super, features);
}
- if (!file)
- kfree(ra);
- return defrag_count;
+ ret = defrag_count;
out_ra:
if (!file)