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syscall: fix dereference of undefined pointer 

linux-user/syscall.c:5581:9: warning: Dereference of undefined pointer value
    if (*host_rt_dev_ptr != 0) {
        ^~~~~~~~~~~~~~~~

Reported-by: Clang Static Analyzer
Suggested-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Philippe Mathieu-Daudé 2017-07-26 23:42:17 -03:00 committed by Michael Tokarev
parent 72cd500b72
commit bc658e4a2e
1 changed files with 1 additions and 0 deletions
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linux-user/syscall.c
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@ -5573,6 +5573,7 @@ static abi_long do_ioctl_rt(const IOCTLEntry *ie, uint8_t *buf_temp,
field_types, THUNK_HOST);
}
unlock_user(argptr, arg, 0);
assert(host_rt_dev_ptr);
ret = get_errno(safe_ioctl(fd, ie->host_cmd, buf_temp));
if (*host_rt_dev_ptr != 0) {