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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-06-06 22:42:06 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-07-08 23:14:54 -0700 |
| commit | 99b10d9afa00889134c325c49aac684d8a9212b2 (patch) | |
| tree | 727b5a2def28c3f2868fb7a2c730cfa95fdf93e8 /include | |
| parent | fac1e65a8e5f16105f47eaed0e7d8d53273cb5ee (diff) | |
af_packet: prevent information leak
[ Upstream commit 13fcb7bd322164c67926ffe272846d4860196dc6 ]
In 2.6.27, commit 393e52e33c6c2 (packet: deliver VLAN TCI to userspace)
added a small information leak.
Add padding field and make sure its zeroed before copy to user.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/if_packet.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/if_packet.h b/include/linux/if_packet.h index 72bfa5a034dd..8e37fbaef8e7 100644 --- a/include/linux/if_packet.h +++ b/include/linux/if_packet.h @@ -62,6 +62,7 @@ struct tpacket_auxdata { __u16 tp_mac; __u16 tp_net; __u16 tp_vlan_tci; + __u16 tp_padding; }; /* Rx ring - header status */ @@ -100,6 +101,7 @@ struct tpacket2_hdr { __u32 tp_sec; __u32 tp_nsec; __u16 tp_vlan_tci; + __u16 tp_padding; }; #define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll)) |