ARC: [arcompact] brown paper bag bug in unaligned access delay slot fixup

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>

diff --git a/arch/arc/kernel/unaligned.c b/arch/arc/kernel/unaligned.c
index b13b422a885c28f62a32dbc67c9b8fcfbcb64447..e6b365d9e0ad4d59e0421e5b45b0c5dd14d0e006 100644 (file)
--- 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;