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[PATCH] linux-user: fix target_to_host_timespec64()
From: |
Laurent Vivier |
Subject: |
[PATCH] linux-user: fix target_to_host_timespec64() |
Date: |
Thu, 27 Aug 2020 09:04:49 +0200 |
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 <laurent@vivier.eu>
---
linux-user/syscall.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index c82b73e03234..9d7376734ad4 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -1253,6 +1253,8 @@ 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;
}
--
2.26.2
- [PATCH] linux-user: fix target_to_host_timespec64(),
Laurent Vivier <=