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| author | Al Viro <viro@ZenIV.linux.org.uk> | 2015-03-20 17:41:43 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-03-20 16:38:06 -0400 |
| commit | 4de930efc23b92ddf88ce91c405ee645fe6e27ea (patch) | |
| tree | a5e02f72e51fca0aefd06600409bd42bc49392fb /net/socket.c | |
| parent | 91edd096e224941131f896b86838b1e59553696a (diff) | |
| download | lwn-4de930efc23b92ddf88ce91c405ee645fe6e27ea.tar.gz lwn-4de930efc23b92ddf88ce91c405ee645fe6e27ea.zip | |
net: validate the range we feed to iov_iter_init() in sys_sendto/sys_recvfrom
Cc: stable@vger.kernel.org # v3.19
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/socket.c')
| -rw-r--r-- | net/socket.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/socket.c b/net/socket.c index bbedbfcb42c2..245330ca0015 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1702,6 +1702,8 @@ SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, if (len > INT_MAX) len = INT_MAX; + if (unlikely(!access_ok(VERIFY_READ, buff, len))) + return -EFAULT; sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) goto out; @@ -1760,6 +1762,8 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, if (size > INT_MAX) size = INT_MAX; + if (unlikely(!access_ok(VERIFY_WRITE, ubuf, size))) + return -EFAULT; sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) goto out; |