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authorFilip Bozuta <Filip.Bozuta@syrmia.com>2020-08-11 13:31:01 +0200
committerLaurent Vivier <laurent@vivier.eu>2020-08-23 16:57:58 +0200
commitb3a3af70c377a3e67d43f3be39a333228487b50c (patch)
tree9ef5d065d786c8f33bc38b784084d1c56073a1f5
parent828cb3a1a89e3ed4b1284c085eeabff39313ddfc (diff)
downloadqemu-arm-b3a3af70c377a3e67d43f3be39a333228487b50c.tar.gz
linux-user: Fix 'utimensat()' implementation
Implementation of syscall 'utimensat()' in 'syscall.c' uses functions target_to_host/host_to_target_timespec() to convert values of 'struct timespec' between host and target. However, the implementation doesn't check whether the conversion succeeds and thus can cause an inappropriate error or succeed unappropriately instead of setting errno EFAULT ('Bad address') which is supposed to be set in these cases. This was confirmed with the LTP test for utimensat ('testcases/utimensat') which fails for test cases when the errno EFAULT is expected. After changes from this patch, the test passes for all test cases. Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20200811113101.6636-1-Filip.Bozuta@syrmia.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
-rw-r--r--linux-user/syscall.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index bbb61a59c7..b4a7b605f3 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -11919,8 +11919,13 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
if (!arg3) {
tsp = NULL;
} else {
- target_to_host_timespec(ts, arg3);
- target_to_host_timespec(ts+1, arg3+sizeof(struct target_timespec));
+ if (target_to_host_timespec(ts, arg3)) {
+ return -TARGET_EFAULT;
+ }
+ if (target_to_host_timespec(ts + 1, arg3 +
+ sizeof(struct target_timespec))) {
+ return -TARGET_EFAULT;
+ }
tsp = ts;
}
if (!arg2)