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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-13 21:28:19 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-13 21:28:19 +0300 |
commit | 4791bcccf8ce02c2bf6f9dfbc328a3a46d9e9569 (patch) | |
tree | 5224a477d2c8b81acf6798f719cf302de71a9c96 /scripts/mod/modpost.c | |
parent | 3882a734c19b3cd7feb9e30e1dbd8ae54ac0905a (diff) | |
parent | 0bf8bf50eddc7511b52461bae798cbfaa0157a34 (diff) | |
download | linux-4791bcccf8ce02c2bf6f9dfbc328a3a46d9e9569.tar.xz |
Merge tag 'modules-for-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
Pull modules updates from Jessica Yu:
"Summary of modules changes for the 4.14 merge window:
- minor code cleanups and fixes
- modpost: avoid building modules that have names that exceed the
size of the name field in struct module"
* tag 'modules-for-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
module: Remove const attribute from alias for MODULE_DEVICE_TABLE
module: fix ddebug_remove_module()
modpost: abort if module name is too long
Diffstat (limited to 'scripts/mod/modpost.c')
-rw-r--r-- | scripts/mod/modpost.c | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index b920d186ad4a..98314b400a95 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -47,6 +47,12 @@ enum export { export_unused_gpl, export_gpl_future, export_unknown }; +/* In kernel, this size is defined in linux/module.h; + * here we use Elf_Addr instead of long for covering cross-compile + */ + +#define MODULE_NAME_LEN (64 - sizeof(Elf_Addr)) + #define PRINTF __attribute__ ((format (printf, 1, 2))) PRINTF void fatal(const char *fmt, ...) @@ -2111,6 +2117,23 @@ static void check_exports(struct module *mod) } } +static int check_modname_len(struct module *mod) +{ + const char *mod_name; + + mod_name = strrchr(mod->name, '/'); + if (mod_name == NULL) + mod_name = mod->name; + else + mod_name++; + if (strlen(mod_name) >= MODULE_NAME_LEN) { + merror("module name is too long [%s.ko]\n", mod->name); + return 1; + } + + return 0; +} + /** * Header for the generated file **/ @@ -2150,11 +2173,6 @@ static void add_staging_flag(struct buffer *b, const char *name) buf_printf(b, "\nMODULE_INFO(staging, \"Y\");\n"); } -/* In kernel, this size is defined in linux/module.h; - * here we use Elf_Addr instead of long for covering cross-compile - */ -#define MODULE_NAME_LEN (64 - sizeof(Elf_Addr)) - /** * Record CRCs for unresolved symbols **/ @@ -2485,6 +2503,7 @@ int main(int argc, char **argv) buf.pos = 0; + err |= check_modname_len(mod); add_header(&buf, mod); add_intree_flag(&buf, !external_module); add_staging_flag(&buf, mod->name); |