linux-kernel - [PATCH] arm64: setup return path for el1

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-next>] [day] [month] [year] [list]

Message-ID: <CAHkaATRdNgcZnAvgKFRmiMEhLOPxFEPpjTu+XNkDk9DxG+4Fpg@mail.gmail.com>
Date:	Tue, 23 Dec 2014 23:15:10 +0800
From:	Min-Hua Chen <orca.chen@...il.com>
To:	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	AKASHI Takahiro <takahiro.akashi@...aro.org>,
	Kevin Hilman <khilman@...aro.org>,
	Larry Bassel <larry.bassel@...aro.org>,
	Laura Abbott <lauraa@...eaurora.org>,
	Neil Zhang <zhangwm@...vell.com>
Cc:	linux-arm-kernel@...ts.infradead.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] arm64: setup return path for el1_undef

Setup return path for el1_undef since el1_undef may
be handled by handlers.

asmlinkage void __exception do_undefinstr(struct pt_regs *regs)
{
    siginfo_t info;
    void __user *pc = (void __user *)instruction_pointer(regs);

    /* check for AArch32 breakpoint instructions */
    if (!aarch32_break_handler(regs))
        return;

    if (call_undef_hook(regs) == 0)
        return;

    ...
}

Signed-off-by: Min-Hua Chen <orca.chen@...il.com>
---
 arch/arm64/kernel/entry.S |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index fd4fa37..86ebec5 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -313,7 +313,8 @@ el1_undef:
      */
     enable_dbg
     mov    x0, sp
-    b    do_undefinstr
+    bl    do_undefinstr
+    kernel_exit 1
 el1_dbg:
     /*
      * Debug exception handling
-- 
1.7.10.4
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/