[PATCH 09/10] security: reduce stack footprint in loadpin_read_file()
From: Anton Suvorov <hidden>
Date: 2021-06-02 15:31:52
Also in:
linux-fsdevel, lkml
Subsystem:
loadpin security module, security subsystem, the rest · Maintainers:
Kees Cook, Paul Moore, James Morris, "Serge E. Hallyn", Linus Torvalds
Stack usage reduced (measured with allyesconfig): ./security/loadpin/loadpin.c loadpin_read_file 200 56 -144 Signed-off-by: Anton Suvorov <redacted> --- security/loadpin/loadpin.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/security/loadpin/loadpin.c b/security/loadpin/loadpin.c
index b12f7d986b1e..ad4e6756c038 100644
--- a/security/loadpin/loadpin.c
+++ b/security/loadpin/loadpin.c@@ -78,11 +78,8 @@ static void check_pinning_enforcement(struct super_block *mnt_sb) * device, allow sysctl to change modes for testing. */ if (mnt_sb->s_bdev) { - char bdev[BDEVNAME_SIZE]; - ro = bdev_read_only(mnt_sb->s_bdev); - bdevname(mnt_sb->s_bdev, bdev); - pr_info("%s (%u:%u): %s\n", bdev, + pr_info("%pg (%u:%u): %s\n", mnt_sb->s_bdev, MAJOR(mnt_sb->s_bdev->bd_dev), MINOR(mnt_sb->s_bdev->bd_dev), ro ? "read-only" : "writable");
--
2.25.1