Andrea Righi a419beac4a module/decompress: use vmalloc() for zstd decompression workspace ... Using kmalloc() to allocate the decompression workspace for zstd may trigger the following warning when large modules are loaded (i.e., xfs): [ 2.961884] WARNING: CPU: 1 PID: 254 at mm/page_alloc.c:4453 __alloc_pages+0x2c3/0x350 ... [ 2.989033] Call Trace: [ 2.989841] <TASK> [ 2.990614] ? show_regs+0x6d/0x80 [ 2.991573] ? __warn+0x89/0x160 [ 2.992485] ? __alloc_pages+0x2c3/0x350 [ 2.993520] ? report_bug+0x17e/0x1b0 [ 2.994506] ? handle_bug+0x51/0xa0 [ 2.995474] ? exc_invalid_op+0x18/0x80 [ 2.996469] ? asm_exc_invalid_op+0x1b/0x20 [ 2.997530] ? module_zstd_decompress+0xdc/0x2a0 [ 2.998665] ? __alloc_pages+0x2c3/0x350 [ 2.999695] ? module_zstd_decompress+0xdc/0x2a0 [ 3.000821] __kmalloc_large_node+0x7a/0x150 [ 3.001920] __kmalloc+0xdb/0x170 [ 3.002824] module_zstd_decompress+0xdc/0x2a0 [ 3.003857] module_decompress+0x37/0xc0 [ 3.004688] init_module_from_file+0xd0/0x100 [ 3.005668] idempotent_init_module+0x11c/0x2b0 [ 3.006632] __x64_sys_finit_module+0x64/0xd0 [ 3.007568] do_syscall_64+0x59/0x90 [ 3.008373] ? ksys_read+0x73/0x100 [ 3.009395] ? exit_to_user_mode_prepare+0x30/0xb0 [ 3.010531] ? syscall_exit_to_user_mode+0x37/0x60 [ 3.011662] ? do_syscall_64+0x68/0x90 [ 3.012511] ? do_syscall_64+0x68/0x90 [ 3.013364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 However, continuous physical memory does not seem to be required in module_zstd_decompress(), so use vmalloc() instead, to prevent the warning and avoid potential failures at loading compressed modules. Fixes: 169a58ad82 ("module/decompress: Support zstd in-kernel decompression") Signed-off-by: Andrea Righi <andrea.righi@canonical.com> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>		2023-08-29 09:39:08 -07:00
..
Kconfig	module: add debugging auto-load duplicate module support	2023-04-19 17:26:01 -07:00
Makefile	module: add debugging auto-load duplicate module support	2023-04-19 17:26:01 -07:00
debug_kmemleak.c	…
decompress.c	module/decompress: use vmalloc() for zstd decompression workspace	2023-08-29 09:39:08 -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
kallsyms.c	modpost, kallsyms: Treat add '$'-prefixed symbols as mapping symbols	2023-07-24 12:09:47 -07:00
kdb.c	module: replace module_layout with module_memory	2023-03-09 12:55:15 -08:00
kmod.c	module: add debugging auto-load duplicate module support	2023-04-19 17:26:01 -07:00
livepatch.c	livepatch: fix ELF typos	2023-03-09 11:08:24 +01:00
main.c	module: Expose module_init_layout_section()	2023-08-03 13:42:02 -07:00
procfs.c	module: replace module_layout with module_memory	2023-03-09 12:55:15 -08:00
signing.c	module: Fix prefix for module.sig_enforce module param	2022-06-02 12:44:33 -07:00
stats.c	module: Fix use-after-free bug in read_file_mod_stats()	2023-05-22 14:13:13 -07:00
strict_rwx.c	module: replace module_layout with module_memory	2023-03-09 12:55:15 -08:00
sysfs.c	module: remove redundant module_sysfs_initialized variable	2022-11-11 10:19:52 -08:00
tracking.c	module: add debug stats to help identify memory pressure	2023-04-18 11:15:24 -07:00
tree_lookup.c	module: replace module_layout with module_memory	2023-03-09 12:55:15 -08:00
version.c	…