https://github.com/torvalds/linux
Revision 3737df782c740b944912ed93420c57344b1cf864 authored by Andrea Righi on 30 August 2023, 15:58:20 UTC, committed by Luis Chamberlain on 01 November 2023, 20:07:08 UTC
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>
1 parent 62eedac
Tip revision: 3737df782c740b944912ed93420c57344b1cf864 authored by Andrea Righi on 30 August 2023, 15:58:20 UTC
module/decompress: use vmalloc() for gzip decompression workspace
module/decompress: use vmalloc() for gzip decompression workspace
Tip revision: 3737df7
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