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[Qemu-devel] [PATCH v3 01/13] linux-user/syscall: Verify recvfrom(addr)
From: |
Philippe Mathieu-Daudé |
Subject: |
[Qemu-devel] [PATCH v3 01/13] linux-user/syscall: Verify recvfrom(addr) is user-writable |
Date: |
Mon, 2 Jul 2018 14:50:18 -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 v3 02/13] linux-user/strace: Improve capget()/capset() output, Philippe Mathieu-Daudé, 2018/07/02
[Qemu-devel] [PATCH v3 05/13] linux-user/strace: Improve settimeofday(), Philippe Mathieu-Daudé, 2018/07/02
[Qemu-devel] [PATCH v3 06/13] linux-user/strace: Dump AF_NETLINK sockaddr content, Philippe Mathieu-Daudé, 2018/07/02
[Qemu-devel] [PATCH v3 07/13] linux-user/strace: Improve recvmsg() output, Philippe Mathieu-Daudé, 2018/07/02