linux-kernel - [REVIEW][PATCH 14/22] signal/riscv: Use force_sig

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20180420143811.9994-14-ebiederm@xmission.com>
Date:   Fri, 20 Apr 2018 09:38:03 -0500
From:   "Eric W. Biederman" <ebiederm@...ssion.com>
To:     linux-arch@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Albert Ou <albert@...ive.com>, linux-riscv@...ts.infradead.org
Subject: [REVIEW][PATCH 14/22] signal/riscv: Use force_sig_fault where appropriate

Filling in struct siginfo before calling force_sig_info a tedious and
error prone process, where once in a great while the wrong fields
are filled out, and siginfo has been inconsistently cleared.

Simplify this process by using the helper force_sig_fault.  Which
takes as a parameters all of the information it needs, ensures
all of the fiddly bits of filling in struct siginfo are done properly
and then calls force_sig_info.

In short about a 5 line reduction in code for every time force_sig_info
is called, which makes the calling function clearer.

Cc: Palmer Dabbelt <palmer@...ive.com>
Cc: Albert Ou <albert@...ive.com>
Cc: linux-riscv@...ts.infradead.org
Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
---
 arch/riscv/kernel/traps.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c
index 48aa6471cede..3087940008f4 100644
--- a/arch/riscv/kernel/traps.c
+++ b/arch/riscv/kernel/traps.c
@@ -66,14 +66,7 @@ void die(struct pt_regs *regs, const char *str)
 static inline void do_trap_siginfo(int signo, int code,
 	unsigned long addr, struct task_struct *tsk)
 {
-	siginfo_t info;
-
-	clear_siginfo(&info);
-	info.si_signo = signo;
-	info.si_errno = 0;
-	info.si_code = code;
-	info.si_addr = (void __user *)addr;
-	force_sig_info(signo, &info, tsk);
+	force_sig_fault(signo, code, (void __user *)addr, tsk);
 }
 
 void do_trap(struct pt_regs *regs, int signo, int code,
-- 
2.14.1