[PATCH 5.10 073/157] module: avoid *goto*s in module_sig_check()
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-03-22 12:50:01
Also in:
lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: Sergey Shtylyov <redacted> [ Upstream commit 10ccd1abb808599a6dc7c9389560016ea3568085 ] Let's move the common handling of the non-fatal errors after the *switch* statement -- this avoids *goto*s inside that *switch*... Suggested-by: Joe Perches <joe@perches.com> Reviewed-by: Miroslav Benes <mbenes@suse.cz> Signed-off-by: Sergey Shtylyov <redacted> Signed-off-by: Jessica Yu <jeyu@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- kernel/module.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/kernel/module.c b/kernel/module.c
index 3b6dd8200d3d..f1be6b6a3a3d 100644
--- a/kernel/module.c
+++ b/kernel/module.c@@ -2923,20 +2923,13 @@ static int module_sig_check(struct load_info *info, int flags) */ case -ENODATA: reason = "unsigned module"; - goto decide; + break; case -ENOPKG: reason = "module with unsupported crypto"; - goto decide; + break; case -ENOKEY: reason = "module with unavailable key"; - decide: - if (is_module_sig_enforced()) { - pr_notice("%s: loading of %s is rejected\n", - info->name, reason); - return -EKEYREJECTED; - } - - return security_locked_down(LOCKDOWN_MODULE_SIGNATURE); + break; /* All other errors are fatal, including nomem, unparseable * signatures and signature check failures - even if signatures
@@ -2945,6 +2938,13 @@ static int module_sig_check(struct load_info *info, int flags) default: return err; } + + if (is_module_sig_enforced()) { + pr_notice("%s: loading of %s is rejected\n", info->name, reason); + return -EKEYREJECTED; + } + + return security_locked_down(LOCKDOWN_MODULE_SIGNATURE); } #else /* !CONFIG_MODULE_SIG */ static int module_sig_check(struct load_info *info, int flags)
--
2.30.1