From: He Zhe <zhe.he@windriver.com>
To: oleg@redhat.com, catalin.marinas@arm.com, will@kernel.org,
linux-arm-kernel@lists.infradead.org, paul@paul-moore.com,
eparis@redhat.com, linux-audit@redhat.com,
linux-kernel@vger.kernel.org, zhe.he@windriver.com
Subject: [PATCH v2 3/3] audit: Use syscall_get_return_value to get syscall return code in audit_syscall_exit
Date: Fri, 23 Apr 2021 18:35:33 +0800 [thread overview]
Message-ID: <20210423103533.30121-3-zhe.he@windriver.com> (raw)
In-Reply-To: <20210423103533.30121-1-zhe.he@windriver.com>
regs_return_value for some architectures like arm64 simply retrieve
register value from pt_regs without sign extension in 32-bit compatible
case and cause audit to have false syscall return code. For example,
32-bit -13 would be treated as 4294967283 below.
type=SYSCALL msg=audit(1611110715.887:582): arch=40000028 syscall=322
success=yes exit=4294967283
We just added proper sign extension in syscall_get_return_value which
should be used instead.
Signed-off-by: He Zhe <zhe.he@windriver.com>
---
v1 to v2: No change
include/linux/audit.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 82b7c1116a85..135adbe22c19 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -334,7 +334,7 @@ static inline void audit_syscall_exit(void *pt_regs)
{
if (unlikely(audit_context())) {
int success = is_syscall_success(pt_regs);
- long return_code = regs_return_value(pt_regs);
+ long return_code = syscall_get_return_value(current, pt_regs);
__audit_syscall_exit(success, return_code);
}
--
2.17.1
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next prev parent reply other threads:[~2021-04-23 10:38 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-23 10:35 [PATCH v2 1/3] arm64: ptrace: Add is_syscall_success to handle compat He Zhe
2021-04-23 10:35 ` [PATCH v2 2/3] arm64: syscall.h: Add sign extension handling in syscall_get_return_value for compat He Zhe
2021-05-05 17:30 ` Mark Rutland
2021-04-23 10:35 ` He Zhe [this message]
2021-05-10 22:38 ` [PATCH v2 3/3] audit: Use syscall_get_return_value to get syscall return code in audit_syscall_exit Paul Moore
2021-05-11 3:19 ` He Zhe
2021-05-11 14:51 ` Paul Moore
2021-05-12 8:43 ` He Zhe
2021-05-14 20:33 ` Paul Moore
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