irda: prevent heap corruption on invalid nickname
commit9345707d16177fa799d5d3588f479559f11d08bb
authorDan Rosenberg <drosenberg@vsecurity.com>
Sat, 19 Mar 2011 20:14:30 +0000 (19 20:14 +0000)
committerWilly Tarreau <w@1wt.eu>
Sat, 30 Apr 2011 14:53:26 +0000 (30 16:53 +0200)
tree9315fd0bb5c0b533cb3c6378cd7b018c8504d97e
parentfa06b46ce9ab258e3815eb39354b30781fb48aa4
irda: prevent heap corruption on invalid nickname

commit d50e7e3604778bfc2dc40f440e0742dbae399d54 upstream.

Invalid nicknames containing only spaces will result in an underflow in
a memcpy size calculation, subsequently destroying the heap and
panicking.

v2 also catches the case where the provided nickname is longer than the
buffer size, which can result in controllable heap corruption.

Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
net/irda/irnet/irnet_ppp.c