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https://github.com/Divested-Mobile/DivestOS-Build.git
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39 lines
1.1 KiB
Diff
39 lines
1.1 KiB
Diff
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From 4de930efc23b92ddf88ce91c405ee645fe6e27ea Mon Sep 17 00:00:00 2001
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From: Al Viro <viro@ZenIV.linux.org.uk>
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Date: Fri, 20 Mar 2015 17:41:43 +0000
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Subject: net: validate the range we feed to iov_iter_init() in
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sys_sendto/sys_recvfrom
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Cc: stable@vger.kernel.org # v3.19
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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net/socket.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/net/socket.c b/net/socket.c
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index bbedbfc..245330c 100644
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--- a/net/socket.c
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+++ b/net/socket.c
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@@ -1702,6 +1702,8 @@ SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len,
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if (len > INT_MAX)
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len = INT_MAX;
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+ if (unlikely(!access_ok(VERIFY_READ, buff, len)))
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+ return -EFAULT;
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sock = sockfd_lookup_light(fd, &err, &fput_needed);
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if (!sock)
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goto out;
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@@ -1760,6 +1762,8 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
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if (size > INT_MAX)
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size = INT_MAX;
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+ if (unlikely(!access_ok(VERIFY_WRITE, ubuf, size)))
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+ return -EFAULT;
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sock = sockfd_lookup_light(fd, &err, &fput_needed);
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if (!sock)
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goto out;
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--
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cgit v1.1
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