From: Heiko Carstens hca@linux.ibm.com
commit 4e1b5a86a5edfbefc9396d41b0fc1a2ebd0101b6 upstream.
For some exception types the instruction address points behind the instruction that caused the exception. Take that into account and add the missing exception table entries.
Cc: stable@vger.kernel.org Reviewed-by: Vasily Gorbik gor@linux.ibm.com Signed-off-by: Heiko Carstens hca@linux.ibm.com Signed-off-by: Vasily Gorbik gor@linux.ibm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/s390/lib/uaccess.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- a/arch/s390/lib/uaccess.c +++ b/arch/s390/lib/uaccess.c @@ -156,7 +156,7 @@ unsigned long __clear_user(void __user * asm volatile( " lr 0,%[spec]\n" "0: mvcos 0(%1),0(%4),%0\n" - " jz 4f\n" + "6: jz 4f\n" "1: algr %0,%2\n" " slgr %1,%2\n" " j 0b\n" @@ -166,11 +166,11 @@ unsigned long __clear_user(void __user * " clgr %0,%3\n" /* copy crosses next page boundary? */ " jnh 5f\n" "3: mvcos 0(%1),0(%4),%3\n" - " slgr %0,%3\n" + "7: slgr %0,%3\n" " j 5f\n" "4: slgr %0,%0\n" "5:\n" - EX_TABLE(0b,2b) EX_TABLE(3b,5b) + EX_TABLE(0b,2b) EX_TABLE(6b,2b) EX_TABLE(3b,5b) EX_TABLE(7b,5b) : "+a" (size), "+a" (to), "+a" (tmp1), "=a" (tmp2) : "a" (empty_zero_page), [spec] "d" (spec.val) : "cc", "memory", "0");