kernel/linux.git/fs/erofs/decompressor_zstd.c, branch linux-7.1.y

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

erofs: enable error reporting for z_erofs_fixup_insize()

2025-11-30T15:49:32+00:00

Enable propagation of detailed errors to callers. Signed-off-by: Gao Xiang

erofs: enable error reporting for z_erofs_stream_switch_bufs()

2025-11-28T14:00:08+00:00

Enable propagation of detailed errors to callers. Signed-off-by: Gao Xiang

erofs: improve Zstd, LZMA and DEFLATE error strings

2025-11-28T14:00:08+00:00

Enable better, more detailed, and unique error reporting. Signed-off-by: Gao Xiang

erofs: improve decompression error reporting

2025-11-28T14:00:07+00:00

Change the return type of decompress() from `int` to `const char *` to provide more informative error diagnostics: - A NULL return indicates successful decompression; - If IS_ERR(ptr) is true, the return value encodes a standard negative errno (e.g., -ENOMEM, -EOPNOTSUPP) identifying the specific error; - Otherwise, a non-NULL return points to a human-readable error string, and the corresponding error code should be treated as -EFSCORRUPTED. Signed-off-by: Gao Xiang

erofs: avoid infinite loop due to incomplete zstd-compressed data

2025-11-06T20:10:45+00:00

Currently, the decompression logic incorrectly spins if compressed data is truncated in crafted (deliberately corrupted) images. Fixes: 7c35de4df105 ("erofs: Zstandard compression support") Reported-by: Robert Morris Closes: https://lore.kernel.org/r/50958.1761605413@localhost Signed-off-by: Gao Xiang Reviewed-by: Chunhai Guo Reviewed-by: Chao Yu

erofs: move {in,out}pages into struct z_erofs_decompress_req

2025-03-16T17:22:50+00:00

It seems that all compressors need those two values, so just move them into the common structure. `struct z_erofs_lz4_decompress_ctx` can be dropped too. Reviewed-by: Chao Yu Signed-off-by: Gao Xiang Link: https://lore.kernel.org/r/20250305124007.1810731-1-hsiangkao@linux.alibaba.com

erofs: tidy up stream decompressors

2024-07-09T11:04:41+00:00

Just use a generic helper to prepare buffers for all supported stream decompressors, eliminating similar logic. Signed-off-by: Gao Xiang Link: https://lore.kernel.org/r/20240709094106.3018109-3-hsiangkao@linux.alibaba.com

erofs: refine z_erofs_{init,exit}_subsystem()

2024-07-09T11:04:40+00:00

Introduce z_erofs_{init,exit}_decompressor() to unexport z_erofs_{deflate,lzma,zstd}_{init,exit}(). Besides, call them in z_erofs_{init,exit}_subsystem() for simplicity. Signed-off-by: Gao Xiang Link: https://lore.kernel.org/r/20240709094106.3018109-2-hsiangkao@linux.alibaba.com