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author | 2013-11-18 04:20:45 +0100 | |
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committer | 2013-11-18 15:12:03 -0500 | |
commit | bceaa90240b6019ed73b49965eac7d167610be69 (patch) | |
tree | f68c10948efff147a7b987369f1e720ad76f411b /net/netlink/genetlink.c | |
parent | net: ipv6: ndisc: Fix warning when CONFIG_SYSCTL=n (diff) | |
download | linux-bceaa90240b6019ed73b49965eac7d167610be69.tar.gz linux-bceaa90240b6019ed73b49965eac7d167610be69.tar.bz2 linux-bceaa90240b6019ed73b49965eac7d167610be69.zip |
inet: prevent leakage of uninitialized memory to user in recv syscalls
Only update *addr_len when we actually fill in sockaddr, otherwise we
can return uninitialized memory from the stack to the caller in the
recvfrom, recvmmsg and recvmsg syscalls. Drop the the (addr_len == NULL)
checks because we only get called with a valid addr_len pointer either
from sock_common_recvmsg or inet_recvmsg.
If a blocking read waits on a socket which is concurrently shut down we
now return zero and set msg_msgnamelen to 0.
Reported-by: mpb <mpb.mail@gmail.com>
Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink/genetlink.c')
0 files changed, 0 insertions, 0 deletions