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| author | Christoph Hellwig <hch@lst.de> | 2020-07-30 08:10:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-11 14:04:04 +0200 |
| commit | cd5a738e28acc126eacfc802d260ccc78ed2d147 (patch) | |
| tree | 56fcdc169296b268839a77186fbd03a555b51820 /kernel/module.c | |
| parent | c4698910a9afc8cee7f0ade4abc867a290300f23 (diff) | |
| download | linux-stable-cd5a738e28acc126eacfc802d260ccc78ed2d147.tar.gz linux-stable-cd5a738e28acc126eacfc802d260ccc78ed2d147.tar.bz2 linux-stable-cd5a738e28acc126eacfc802d260ccc78ed2d147.zip | |
modules: return licensing information from find_symbol
commit ef1dac6021cc8ec5de02ce31722bf26ac4ed5523 upstream.
Report the GPLONLY status through a new argument.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/module.c')
| -rw-r--r-- | kernel/module.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/kernel/module.c b/kernel/module.c index 2da1fdeaadae..124b50860ac3 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -493,6 +493,7 @@ struct find_symbol_arg { struct module *owner; const s32 *crc; const struct kernel_symbol *sym; + enum mod_license license; }; static bool check_exported_symbol(const struct symsearch *syms, @@ -526,6 +527,7 @@ static bool check_exported_symbol(const struct symsearch *syms, fsa->owner = owner; fsa->crc = symversion(syms->crcs, symnum); fsa->sym = &syms->start[symnum]; + fsa->license = syms->license; return true; } @@ -585,6 +587,7 @@ static bool find_exported_symbol_in_section(const struct symsearch *syms, static const struct kernel_symbol *find_symbol(const char *name, struct module **owner, const s32 **crc, + enum mod_license *license, bool gplok, bool warn) { @@ -599,6 +602,8 @@ static const struct kernel_symbol *find_symbol(const char *name, *owner = fsa.owner; if (crc) *crc = fsa.crc; + if (license) + *license = fsa.license; return fsa.sym; } @@ -1072,7 +1077,7 @@ void __symbol_put(const char *symbol) struct module *owner; preempt_disable(); - if (!find_symbol(symbol, &owner, NULL, true, false)) + if (!find_symbol(symbol, &owner, NULL, NULL, true, false)) BUG(); module_put(owner); preempt_enable(); @@ -1350,7 +1355,7 @@ static inline int check_modstruct_version(const struct load_info *info, * locking is necessary -- use preempt_disable() to placate lockdep. */ preempt_disable(); - if (!find_symbol("module_layout", NULL, &crc, true, false)) { + if (!find_symbol("module_layout", NULL, &crc, NULL, true, false)) { preempt_enable(); BUG(); } @@ -1434,6 +1439,7 @@ static const struct kernel_symbol *resolve_symbol(struct module *mod, struct module *owner; const struct kernel_symbol *sym; const s32 *crc; + enum mod_license license; int err; /* @@ -1443,7 +1449,7 @@ static const struct kernel_symbol *resolve_symbol(struct module *mod, */ sched_annotate_sleep(); mutex_lock(&module_mutex); - sym = find_symbol(name, &owner, &crc, + sym = find_symbol(name, &owner, &crc, &license, !(mod->taints & (1 << TAINT_PROPRIETARY_MODULE)), true); if (!sym) goto unlock; @@ -2258,7 +2264,7 @@ void *__symbol_get(const char *symbol) const struct kernel_symbol *sym; preempt_disable(); - sym = find_symbol(symbol, &owner, NULL, true, true); + sym = find_symbol(symbol, &owner, NULL, NULL, true, true); if (sym && strong_try_module_get(owner)) sym = NULL; preempt_enable(); @@ -2294,7 +2300,7 @@ static int verify_exported_symbols(struct module *mod) for (i = 0; i < ARRAY_SIZE(arr); i++) { for (s = arr[i].sym; s < arr[i].sym + arr[i].num; s++) { if (find_symbol(kernel_symbol_name(s), &owner, NULL, - true, false)) { + NULL, true, false)) { pr_err("%s: exports duplicate symbol %s" " (owned by %s)\n", mod->name, kernel_symbol_name(s), |