6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: wangzijie wangzijie1@honor.com
[ Upstream commit 23361bd54966b437e1ed3eb1a704572f4b279e58 ]
When we get wrong extent info data, and look up extent_node in rb tree, it will cause infinite loop (CONFIG_F2FS_CHECK_FS=n). Avoiding this by return NULL and print some kernel messages in that case.
Signed-off-by: wangzijie wangzijie1@honor.com Reviewed-by: Chao Yu chao@kernel.org Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/f2fs/extent_cache.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c index 6a77581106a9e..79d07c786f6ae 100644 --- a/fs/f2fs/extent_cache.c +++ b/fs/f2fs/extent_cache.c @@ -562,7 +562,13 @@ static struct extent_node *__insert_extent_tree(struct f2fs_sb_info *sbi, p = &(*p)->rb_right; leftmost = false; } else { + f2fs_err_ratelimited(sbi, "%s: corrupted extent, type: %d, " + "extent node in rb tree [%u, %u, %u], age [%llu, %llu], " + "extent node to insert [%u, %u, %u], age [%llu, %llu]", + __func__, et->type, en->ei.fofs, en->ei.blk, en->ei.len, en->ei.age, + en->ei.last_blocks, ei->fofs, ei->blk, ei->len, ei->age, ei->last_blocks); f2fs_bug_on(sbi, 1); + return NULL; } }