From 00576757893aa63d221418a1d05c08ed10f94c09 Mon Sep 17 00:00:00 2001 From: Laurent Vivier Date: Thu, 27 Aug 2020 09:04:49 +0200 Subject: [PATCH] linux-user: fix target_to_host_timespec64() in 32 bit mode, drop the padding in tv_nsec. If host is 64bit and target is 32bit, the padding bytes will be copied from the target and as the kernel checks the value, the syscall exits with EINVAL. Signed-off-by: Laurent Vivier Message-Id: <20200827070449.2386007-1-laurent@vivier.eu> Fixes: c6c8d1026e75 ("linux-user/syscall: Add support for clock_gettime64/clock_settime64") --- linux-user/syscall.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index fd13e72305..3b725bbe25 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -1229,6 +1229,8 @@ static inline abi_long target_to_host_timespec64(struct timespec *host_ts, } __get_user(host_ts->tv_sec, &target_ts->tv_sec); __get_user(host_ts->tv_nsec, &target_ts->tv_nsec); + /* in 32bit mode, this drops the padding */ + host_ts->tv_nsec = (long)(abi_long)host_ts->tv_nsec; unlock_user_struct(target_ts, target_addr, 0); return 0; }