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linux-user: Use cpu_untagged_addr in access_ok; split out *_untagged

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Provide both tagged and untagged versions of access_ok.
In a few places use thread_cpu, as the user is several
callees removed from do_syscall1.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210212184902.1251044-17-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson
2021-02-12 10:48:47 -08:00
committed by Peter Maydell
parent 46b12f461c
commit c7169b022b
6 changed files with 24 additions and 13 deletions
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9
linux-user/syscall.c
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@@ -3526,8 +3526,9 @@ static abi_long do_accept4(int fd, abi_ulong target_addr,
return -TARGET_EINVAL;
}
if (!access_ok(VERIFY_WRITE, target_addr, addrlen))
if (!access_ok(thread_cpu, VERIFY_WRITE, target_addr, addrlen)) {
return -TARGET_EFAULT;
}
addr = alloca(addrlen);
@@ -3557,8 +3558,9 @@ static abi_long do_getpeername(int fd, abi_ulong target_addr,
return -TARGET_EINVAL;
}
if (!access_ok(VERIFY_WRITE, target_addr, addrlen))
if (!access_ok(thread_cpu, VERIFY_WRITE, target_addr, addrlen)) {
return -TARGET_EFAULT;
}
addr = alloca(addrlen);
@@ -3588,8 +3590,9 @@ static abi_long do_getsockname(int fd, abi_ulong target_addr,
return -TARGET_EINVAL;
}
if (!access_ok(VERIFY_WRITE, target_addr, addrlen))
if (!access_ok(thread_cpu, VERIFY_WRITE, target_addr, addrlen)) {
return -TARGET_EFAULT;
}
addr = alloca(addrlen);