Below information is reported by a lower kernel version, and I saw the problem still exist in current version.
UBSAN: Undefined behaviour in include/linux/ktime.h:55:34 signed integer overflow: -4971973988617027584 * 1000000000 cannot be represented in type 'long int' ...... [<ffff80000072ca28>] timespec_to_ktime include/linux/ktime.h:55 [inline] [<ffff80000072ca28>] read_events+0x4c8/0x5d0 fs/aio.c:1269 [<ffff8000007305bc>] SYSC_io_getevents fs/aio.c:1733 [inline] [<ffff8000007305bc>] SyS_io_getevents+0xd4/0x218 fs/aio.c:1722 Signed-off-by: Zhen Lei <[email protected]> --- fs/aio.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/aio.c b/fs/aio.c index a062d75..19f7661 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -1858,6 +1858,9 @@ static long do_io_getevents(aio_context_t ctx_id, if (timeout) { if (unlikely(get_timespec64(&ts, timeout))) return -EFAULT; + + if (!timespec64_valid(&ts)) + return -EINVAL; } return do_io_getevents(ctx_id, min_nr, nr, events, timeout ? &ts : NULL); @@ -1876,6 +1879,8 @@ static long do_io_getevents(aio_context_t ctx_id, if (compat_get_timespec64(&t, timeout)) return -EFAULT; + if (!timespec64_valid(&t)) + return -EINVAL; } return do_io_getevents(ctx_id, min_nr, nr, events, timeout ? &t : NULL); -- 1.8.3
