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Gao Xiang e424638474 erofs: ensure m_llen is reset to 0 if metadata is invalid

[ Upstream commit 9b32b063be1001e322c5f6e01f2a649636947851 ]

Sometimes, the on-disk metadata might be invalid due to user
interrupts, storage failures, or other unknown causes.

In that case, z_erofs_map_blocks_iter() may still return a valid
m_llen while other fields remain invalid (e.g., m_plen can be 0).

Due to the return value of z_erofs_scan_folio() in some path will
be ignored on purpose, the following z_erofs_scan_folio() could
then use the invalid value by accident.

Let's reset m_llen to 0 to prevent this.

Link: https://lore.kernel.org/r/20240629185743.2819229-1-hsiangkao@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-07-25 09:49:18 +02:00

compress.h

erofs: simplify compression configuration parser

2024-03-01 13:26:38 +01:00

data.c

erofs: apply proper VMA alignment for memory mapped files on THP

2024-03-15 10:48:16 -04:00

decompressor_lzma.c

erofs: simplify compression configuration parser

2024-03-01 13:26:38 +01:00

decompressor.c

erofs: fix inconsistent per-file compression format