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deffe1edba
linux/kernel/module
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Petr Pavlu deffe1edba module: Fix freeing of charp module parameters when CONFIG_SYSFS=n 
When setting a charp module parameter, the param_set_charp() function
allocates memory to store a copy of the input value. Later, when the module
is potentially unloaded, the destroy_params() function is called to free
this allocated memory.

However, destroy_params() is available only when CONFIG_SYSFS=y, otherwise
only a dummy variant is present. In the unlikely case that the kernel is
configured with CONFIG_MODULES=y and CONFIG_SYSFS=n, this results in
a memory leak of charp values when a module is unloaded.

Fix this issue by making destroy_params() always available when
CONFIG_MODULES=y. Rename the function to module_destroy_params() to clarify
that it is intended for use by the module loader.

Fixes: e180a6b775 ("param: fix charp parameters set via sysfs")
Signed-off-by: Petr Pavlu <petr.pavlu@suse.com>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
2026-03-18 21:43:18 +00:00
..
debug_kmemleak.c module: prepare to handle ROX allocations for text 2024-11-07 14:25:15 -08:00
decompress.c module/decompress: Avoid open-coded kvrealloc() 2025-12-22 16:35:54 +00:00
dups.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
internal.h module: move 'struct module_use' to internal.h 2025-07-31 13:40:46 +02:00
kallsyms.c module: add helper function for reading module_buildid() 2026-01-20 19:44:22 -08:00
Kconfig module: Fix the modversions and signing submenus 2026-02-23 17:45:03 +00:00
kdb.c module: replace module_layout with module_memory 2023-03-09 12:55:15 -08:00
kmod.c kernel: modules: Add SPDX license identifier to kmod.c 2026-01-15 16:58:28 -08:00
livepatch.c livepatch: fix ELF typos 2023-03-09 11:08:24 +01:00
main.c module: Fix freeing of charp module parameters when CONFIG_SYSFS=n 2026-03-18 21:43:18 +00:00
Makefile module: Fix KCOV-ignored file name 2024-08-08 17:36:35 +02:00
procfs.c module: replace module_layout with module_memory 2023-03-09 12:55:15 -08:00
signing.c
stats.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
strict_rwx.c module: Make .static_call_sites read-only after init 2025-05-18 13:56:22 +02:00
sysfs.c Convert 'alloc_flex' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
tracking.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
tree_lookup.c kcfi: Rename CONFIG_CFI_CLANG to CONFIG_CFI 2025-09-24 14:29:14 -07:00
version.c module: Use RCU in find_symbol(). 2025-03-10 11:54:44 +01:00