Petr Pavlu 231b895daa module: Fix freeing of charp module parameters when CONFIG_SYSFS=n ...

[ Upstream commit deffe1edba ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2026-05-23 13:03:06 +02:00

..

debug_kmemleak.c

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decompress.c

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dups.c

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internal.h

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kallsyms.c

module: add helper function for reading module_buildid()

2026-03-04 07:19:45 -05:00

Kconfig

module: sign with sha512 instead of sha1 by default

2025-05-02 07:50:36 +02:00

kdb.c

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kmod.c

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livepatch.c

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main.c

module: Fix freeing of charp module parameters when CONFIG_SYSFS=n

2026-05-23 13:03:06 +02:00

Makefile

module: Fix KCOV-ignored file name

2024-10-04 16:30:03 +02:00

procfs.c

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signing.c

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stats.c

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strict_rwx.c

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sysfs.c

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tracking.c

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tree_lookup.c

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version.c

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