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Gao Xiang acc2f40b98 erofs: fix order >= MAX_ORDER warning due to crafted negative i_size

[ Upstream commit 1dd73601a1cba37a0ed5f89a8662c90191df5873 ]

As syzbot reported [1], the root cause is that i_size field is a
signed type, and negative i_size is also less than EROFS_BLKSIZ.
As a consequence, it's handled as fast symlink unexpectedly.

Let's fall back to the generic path to deal with such unusual i_size.

[1] https://lore.kernel.org/r/000000000000ac8efa05e7feaa1f@google.com

Reported-by: syzbot+f966c13b1b4fc0403b19@syzkaller.appspotmail.com
Fixes: 431339ba9042 ("staging: erofs: add inode operations")
Reviewed-by: Yue Hu <huyue2@coolpad.com>
Link: https://lore.kernel.org/r/20220909023948.28925-1-hsiangkao@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2022-12-08 11:28:37 +01:00

compress.h

erofs: clean up file headers & footers

2021-06-08 00:41:24 +08:00

data.c

iomap: Add done_before argument to iomap_dio_rw

2022-05-01 17:22:32 +02:00

decompressor.c

erofs: avoid consecutive detection for Highmem memory

2022-08-17 14:23:12 +02:00

dir.c

erofs: clean up file headers & footers