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Christoph Hellwig 784a1fd76b modules: only allow symbol_get of EXPORT_SYMBOL_GPL modules 
commit 9011e49d54 upstream.

It has recently come to my attention that nvidia is circumventing the
protection added in 262e6ae708 ("modules: inherit
TAINT_PROPRIETARY_MODULE") by importing exports from their proprietary
modules into an allegedly GPL licensed module and then rexporting them.

Given that symbol_get was only ever intended for tightly cooperating
modules using very internal symbols it is logical to restrict it to
being used on EXPORT_SYMBOL_GPL and prevent nvidia from costly DMCA
Circumvention of Access Controls law suites.

All symbols except for four used through symbol_get were already exported
as EXPORT_SYMBOL_GPL, and the remaining four ones were switched over in
the preparation patches.

Fixes: 262e6ae708 ("modules: inherit TAINT_PROPRIETARY_MODULE")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-09-06 21:25:29 +01:00
..
debug_kmemleak.c
decompress.c module/decompress: use vmalloc() for zstd decompression workspace 2023-09-02 09:14:37 +02:00
dups.c module: include internal.h in module/dups.c 2023-05-02 20:33:36 -07:00
internal.h modules-6.4-rc1 2023-04-27 16:36:55 -07:00
kallsyms.c modules-6.4-rc1 2023-04-27 16:36:55 -07:00
Kconfig module: add debugging auto-load duplicate module support 2023-04-19 17:26:01 -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 modules: only allow symbol_get of EXPORT_SYMBOL_GPL modules 2023-09-06 21:25:29 +01:00
Makefile module: add debugging auto-load duplicate module support 2023-04-19 17:26:01 -07:00
procfs.c module: replace module_layout with module_memory 2023-03-09 12:55:15 -08:00
signing.c
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