From 1266b4a7ecb679587dc4d098abe56ea53313d569 Mon Sep 17 00:00:00 2001 From: Gao Xiang Date: Wed, 25 Aug 2021 20:07:57 +0800 Subject: erofs: fix double free of 'copied' Dan reported a new smatch warning [1] "fs/erofs/inode.c:210 erofs_read_inode() error: double free of 'copied'" Due to new chunk-based format handling logic, the error path can be called after kfree(copied). Set "copied = NULL" after kfree(copied) to fix this. [1] https://lore.kernel.org/r/202108251030.bELQozR7-lkp@intel.com Link: https://lore.kernel.org/r/20210825120757.11034-1-hsiangkao@linux.alibaba.com Fixes: c5aa903a59db ("erofs: support reading chunk-based uncompressed files") Reported-by: kernel test robot Reported-by: Dan Carpenter Reviewed-by: Chao Yu Signed-off-by: Gao Xiang --- fs/erofs/inode.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/erofs/inode.c') diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c index 4408929bd6f5..31ac3a73b390 100644 --- a/fs/erofs/inode.c +++ b/fs/erofs/inode.c @@ -127,6 +127,7 @@ static struct page *erofs_read_inode(struct inode *inode, /* fill chunked inode summary info */ vi->chunkformat = le16_to_cpu(die->i_u.c.format); kfree(copied); + copied = NULL; break; case EROFS_INODE_LAYOUT_COMPACT: vi->inode_isize = sizeof(struct erofs_inode_compact); -- cgit v1.2.3