[PATCH 3.10 141/268] ARC: [arcompact] brown paper bag bug in unaligned access delay slot fixup

Willy Tarreau
2017-06-19T18:37:01Z

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

commit a524c218bc94c705886a0e0fedeee45d1931da32 upstream.

Reported-by: Jo-Philipp Wich <jo@mein.io>
Fixes: 9aed02feae57bf7 ("ARC: [arcompact] handle unaligned access delay slot")
Cc: linux-kernel@vger.kernel.org
Cc: linux-snps-arc@lists.infradead.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
---
arch/arc/kernel/unaligned.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arc/kernel/unaligned.c b/arch/arc/kernel/unaligned.c
index b13b422..e6b365d 100644
--- a/arch/arc/kernel/unaligned.c
+++ b/arch/arc/kernel/unaligned.c
@@ -230,7 +230,7 @@ int misaligned_fixup(unsigned long address, struct pt_regs *regs,

/* 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;
--
2.8.0.rc2.1.gbe9624a