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[Qemu-devel] [PATCH v4 01/12] linux-user/syscall: Verify recvfrom(addr)
From: |
Philippe Mathieu-Daudé |
Subject: |
[Qemu-devel] [PATCH v4 01/12] linux-user/syscall: Verify recvfrom(addr) is user-writable |
Date: |
Tue, 3 Jul 2018 12:33:35 -0300 |
Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
Tested-By: Guido Günther <address@hidden>
Reviewed-by: Laurent Vivier <address@hidden>
---
linux-user/syscall.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 2117fb13b4..ad40682cee 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4154,6 +4154,11 @@ static abi_long do_recvfrom(int fd, abi_ulong msg,
size_t len, int flags,
ret = -TARGET_EINVAL;
goto fail;
}
+ if (!access_ok(VERIFY_WRITE, target_addr, addrlen)) {
+ ret = -TARGET_EFAULT;
+ goto fail;
+ }
+
addr = alloca(addrlen);
ret = get_errno(safe_recvfrom(fd, host_msg, len, flags,
addr, &addrlen));
--
2.18.0
- [Qemu-devel] [PATCH v4 00/12] linux-user: strace improvements, Philippe Mathieu-Daudé, 2018/07/03
- [Qemu-devel] [PATCH v4 01/12] linux-user/syscall: Verify recvfrom(addr) is user-writable,
Philippe Mathieu-Daudé <=
- [Qemu-devel] [PATCH v4 02/12] linux-user/strace: Improve capget()/capset() output, Philippe Mathieu-Daudé, 2018/07/03
- [Qemu-devel] [PATCH v4 05/12] linux-user/strace: Improve settimeofday(), Philippe Mathieu-Daudé, 2018/07/03
- [Qemu-devel] [PATCH v4 06/12] linux-user/syscall: Introduce target_sockaddr_nl, Philippe Mathieu-Daudé, 2018/07/03
- [Qemu-devel] [PATCH v4 09/12] linux-user/strace: Add print_sockfd(), Philippe Mathieu-Daudé, 2018/07/03
- [Qemu-devel] [PATCH v4 08/12] linux-user/strace: Improve recvmsg() output, Philippe Mathieu-Daudé, 2018/07/03
- [Qemu-devel] [PATCH v4 10/12] linux-user/strace: Let print_sockaddr() have a 'last' argument, Philippe Mathieu-Daudé, 2018/07/03