linux-kernel - [PATCH 3.16 282/370] ARC: [arcompact] brown paper bag bug in unaligned access delay slot fixup

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Message-ID: <lsq.1489146383.162481160@decadent.org.uk>
Date:   Fri, 10 Mar 2017 11:46:23 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Linus Torvalds" <torvalds@...ux-foundation.org>,
        "Jo-Philipp Wich" <jo@...n.io>,
        "Vineet Gupta" <Vineet.Gupta1@...opsys.com>,
        "Vineet Gupta" <vgupta@...opsys.com>,
        linux-snps-arc@...ts.infradead.org
Subject: [PATCH 3.16 282/370] ARC: [arcompact] brown paper bag bug in
 unaligned access delay slot fixup

3.16.42-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Vineet Gupta <Vineet.Gupta1@...opsys.com>

commit a524c218bc94c705886a0e0fedeee45d1931da32 upstream.

Reported-by: Jo-Philipp Wich <jo@...n.io>
Fixes: 9aed02feae57bf7 ("ARC: [arcompact] handle unaligned access delay slot")
Cc: linux-kernel@...r.kernel.org
Cc: linux-snps-arc@...ts.infradead.org
Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 arch/arc/kernel/unaligned.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arc/kernel/unaligned.c
+++ b/arch/arc/kernel/unaligned.c
@@ -242,7 +242,7 @@ int misaligned_fixup(unsigned long addre
 
 	/* clear any remanants of delay slot */
 	if (delay_mode(regs)) {
-		regs->ret = regs->bta ~1U;
+		regs->ret = regs->bta & ~1U;
 		regs->status32 &= ~STATUS_DE_MASK;
 	} else {
 		regs->ret += state.instr_len;