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f2fs: add a max block check for get_data_block_bmap

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This patch adds a max block check for get_data_block_bmap.

Trinity test program will send a block number as parameter into
ioctl_fibmap, which will be used in get_node_path(), when the block
number large than f2fs max blocks, it will trigger kernel bug.

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Xue Liu <liuxueliu.liu@huawei.com>
[Jaegeuk Kim: fix missing condition, pointed by Chao Yu]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Yunlei He
2015-12-28 21:48:32 +08:00
committed by Jaegeuk Kim
parent 9a950d52b7
commit 179448bfe4
3 changed files with 6 additions and 1 deletions
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4
fs/f2fs/data.c
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@@ -761,6 +761,10 @@ static int get_data_block_dio(struct inode *inode, sector_t iblock,
static int get_data_block_bmap(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create)
{
/* Block number less than F2FS MAX BLOCKS */
if (unlikely(iblock >= max_file_size(0)))
return -EFBIG;
return __get_data_block(inode, iblock, bh_result, create,
F2FS_GET_BLOCK_BMAP);
}