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authorYunlei He <heyunlei@huawei.com>2017-04-26 15:56:52 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2017-05-03 19:00:30 -0700
commite9cdd307704b5a8f685fa3fff4403691fbf64f97 (patch)
tree8dc251a86f1a2c61a529542807a3dd1fdc024a3e /fs/f2fs/node.c
parentbaaabbb72b0960d6d5220b77f206116aa54771de (diff)
f2fs: fix a mount fail for wrong next_scan_nid
-write_checkpoint -do_checkpoint -next_free_nid <--- something wrong with next free nid -f2fs_fill_super -build_node_manager -build_free_nids -get_current_nat_page -__get_meta_page <--- attempt to access beyond end of device Signed-off-by: Yunlei He <heyunlei@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/node.c')
-rw-r--r--fs/f2fs/node.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index b99e318bce58..98351a4a4da3 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1955,6 +1955,9 @@ static void __build_free_nids(struct f2fs_sb_info *sbi, bool sync, bool mount)
int i = 0;
nid_t nid = nm_i->next_scan_nid;
+ if (unlikely(nid >= nm_i->max_nid))
+ nid = 0;
+
/* Enough entries */
if (nm_i->nid_cnt[FREE_NID_LIST] >= NAT_ENTRY_PER_BLOCK)
return;