| Message ID | 20221102171025.126961-2-penguin-kernel@I-love.SAKURA.ne.jp (mailing list archive) |
|---|---|
| State | Rejected |
| Delegated to: | Paul Moore |
| Headers | show |
| Series | [01/10] security: Export security_hook_heads | expand |
diff --git a/mm/maccess.c b/mm/maccess.c index 5f4d240f67ec..f75447b13034 100644 --- a/mm/maccess.c +++ b/mm/maccess.c @@ -75,6 +75,7 @@ long copy_to_kernel_nofault(void *dst, const void *src, size_t size) pagefault_enable(); return -EFAULT; } +EXPORT_SYMBOL_GPL(copy_to_kernel_nofault); long strncpy_from_kernel_nofault(char *dst, const void *unsafe_addr, long count) {
LSM modules which can be loaded using /sbin/insmod need to be able to modify security_hook_heads. Since security_hook_heads might be read-only due to being marked as __lsm_ro_after_init, and writing to read-only memory crashes the kernel, such LSM modules need to test whether memory pages containing security_hook_heads is read-only. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> --- mm/maccess.c | 1 + 1 file changed, 1 insertion(+)