diff options
author | Mathias Krause <minipli@googlemail.com> | 2013-04-07 01:51:48 +0000 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-01 08:56:38 -0700 |
commit | 9a627f671963d81b5fdf910ddcba905328215b1f (patch) | |
tree | d2a39186da4eefe1ac39875af5453f5fade63936 /kernel/up.c | |
parent | 8d5746899e9a140317c229401bfcf844a11a0247 (diff) |
ax25: fix info leak via msg_name in ax25_recvmsg()
[ Upstream commit ef3313e84acbf349caecae942ab3ab731471f1a1 ]
When msg_namelen is non-zero the sockaddr info gets filled out, as
requested, but the code fails to initialize the padding bytes of struct
sockaddr_ax25 inserted by the compiler for alignment. Additionally the
msg_namelen value is updated to sizeof(struct full_sockaddr_ax25) but is
not always filled up to this size.
Both issues lead to the fact that the code will leak uninitialized
kernel stack bytes in net/socket.c.
Fix both issues by initializing the memory with memset(0).
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/up.c')
0 files changed, 0 insertions, 0 deletions