linux

iv/linux

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Andrea Righi 3737df782c module/decompress: use vmalloc() for gzip decompression workspace

Use a similar approach as commit a419beac4a07 ("module/decompress: use
vmalloc() for zstd decompression workspace") and replace kmalloc() with
vmalloc() also for the gzip module decompression workspace.

In this case the workspace is represented by struct inflate_workspace
that can be fairly large for kmalloc() and it can potentially lead to
allocation errors on certain systems:

$ pahole inflate_workspace
struct inflate_workspace {
	struct inflate_state       inflate_state;        /*     0  9544 */
	/* --- cacheline 149 boundary (9536 bytes) was 8 bytes ago --- */
	unsigned char              working_window[32768]; /*  9544 32768 */

	/* size: 42312, cachelines: 662, members: 2 */
	/* last cacheline: 8 bytes */
};

Considering that there is no need to use continuous physical memory,
simply switch to vmalloc() to provide a more reliable in-kernel module
decompression.

Fixes: b1ae6dc41eaa ("module: add in-kernel support for decompressing")
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

2023-11-01 13:07:08 -07:00

debug_kmemleak.c

…

decompress.c

module/decompress: use vmalloc() for gzip decompression workspace

2023-11-01 13:07:08 -07:00

dups.c

module: include internal.h in module/dups.c

2023-05-02 20:33:36 -07:00

internal.h

kbuild: generate KSYMTAB entries by modpost

2023-06-22 21:17:10 +09:00