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 3/3] audit: Use syscall_get_return_value to get syscall return code in audit_syscall_exit
Date: Fri, 16 Apr 2021 15:55:33 +0800 [thread overview]
Message-ID: <20210416075533.7720-3-zhe.he@windriver.com> (raw)
In-Reply-To: <20210416075533.7720-1-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>
---
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
next prev parent reply other threads:[~2021-04-16 7:56 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-16 7:55 [PATCH 1/3] arm64: ptrace: Add is_syscall_success to handle compat He Zhe
2021-04-16 7:55 ` [PATCH 2/3] arm64: syscall.h: Add sign extension handling in syscall_get_return_value for compat He Zhe
2021-04-16 9:43 ` Oleg Nesterov
2021-04-20 8:38 ` He Zhe
2021-04-21 17:41 ` Mark Rutland
2021-04-22 16:55 ` Mark Rutland
2021-04-16 7:55 ` He Zhe [this message]
2021-04-16 12:33 ` [PATCH 1/3] arm64: ptrace: Add is_syscall_success to handle compat Catalin Marinas
2021-04-16 13:34 ` Mark Rutland
2021-04-17 13:19 ` David Laight
2021-04-19 12:19 ` Will Deacon
2021-04-20 8:54 ` He Zhe
2021-04-21 17:10 ` Mark Rutland
2021-04-22 16:07 ` Will Deacon
2021-04-22 16:42 ` Mark Rutland
2021-04-22 18:57 ` Dmitry V. Levin
2021-04-20 8:42 ` He Zhe
2021-04-21 17:17 ` Mark Rutland
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210416075533.7720-3-zhe.he@windriver.com \
--to=zhe.he@windriver.com \
--cc=catalin.marinas@arm.com \
--cc=eparis@redhat.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-audit@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=oleg@redhat.com \
--cc=paul@paul-moore.com \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).