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[Qemu-devel] [PATCH 10/11] linux-user/syscall: verify recvfrom(addr) is
From: |
Philippe Mathieu-Daudé |
Subject: |
[Qemu-devel] [PATCH 10/11] linux-user/syscall: verify recvfrom(addr) is user-writable |
Date: |
Wed, 24 Jan 2018 10:01:25 -0300 |
Signed-off-by: Philippe Mathieu-Daudé <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 11c9116c4a..b6b9beca5b 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -4040,6 +4040,11 @@ 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));
--
2.15.1
- [Qemu-devel] [PATCH 00/11] linux-user: improve NETLINK strace, Philippe Mathieu-Daudé, 2018/01/24
- [Qemu-devel] [PATCH 02/11] linux-user/strace: improve sendto() output, Philippe Mathieu-Daudé, 2018/01/24
- [Qemu-devel] [RFC PATCH 01/11] linux-user/strace: dump AF_NETLINK sockaddr content, Philippe Mathieu-Daudé, 2018/01/24
- [Qemu-devel] [PATCH 04/11] linux-user/strace: improve recvfrom() output, Philippe Mathieu-Daudé, 2018/01/24
- [Qemu-devel] [PATCH 03/11] linux-user/strace: add print_sockaddr_ptr() to handle plain/pointer addrlen, Philippe Mathieu-Daudé, 2018/01/24
- [Qemu-devel] [PATCH 06/11] linux-user/strace: improve recvmsg() output, Philippe Mathieu-Daudé, 2018/01/24
- [Qemu-devel] [PATCH 05/11] linux-user/strace: improve getsockname() output, Philippe Mathieu-Daudé, 2018/01/24
- [Qemu-devel] [PATCH 07/11] linux-user/strace: improve bind() output, Philippe Mathieu-Daudé, 2018/01/24
- [Qemu-devel] [PATCH 11/11] linux-user/syscall: simplify recvfrom(), Philippe Mathieu-Daudé, 2018/01/24
- [Qemu-devel] [PATCH 09/11] linux-user/strace: improve capget()/capset() output, Philippe Mathieu-Daudé, 2018/01/24
- [Qemu-devel] [PATCH 10/11] linux-user/syscall: verify recvfrom(addr) is user-writable,
Philippe Mathieu-Daudé <=
- [Qemu-devel] [PATCH 08/11] linux-user/strace: improve gettimeofday() output, Philippe Mathieu-Daudé, 2018/01/24
- Re: [Qemu-devel] [PATCH 00/11] linux-user: improve NETLINK strace, Guido Günther, 2018/01/24
- Re: [Qemu-devel] [PATCH 00/11] linux-user: improve NETLINK strace, Guido Günther, 2018/01/28