On 7/14/26 12:02, Ilya Leoshkevich wrote:
helper_divs32() divides the 64-bit dividend by the 32-bit divisor as a 64-bit host operation, guarding only against a zero divisor. INT64_MIN / -1 therefore overflows the host division before the representability check runs; on hosts that trap this, QEMU is killed with SIGFPE instead of raising the fixed-point-divide exception the guest expects:qemu-s390x: QEMU internal SIGFPE {code=INTDIV, addr=...} helper_divs64() already guards the same case; add the missing check to helper_divs32(). Reported-by: Christian Borntraeger<[email protected]> Fixes: b4e2bd3563af ("target-s390: Send signals for divide") Cc:[email protected] Signed-off-by: Ilya Leoshkevich<[email protected]> --- target/s390x/tcg/int_helper.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
Reviewed-by: Richard Henderson <[email protected]> r~
