Gerrit Renker 720dc34bbb dccp: fix oops on Reset after close ... This fixes a bug in the order of dccp_rcv_state_process() that still permitted reception even after closing the socket. A Reset after close thus causes a NULL pointer dereference by not preventing operations on an already torn-down socket. dccp_v4_do_rcv() | | state other than OPEN v dccp_rcv_state_process() | | DCCP_PKT_RESET v dccp_rcv_reset() | v dccp_time_wait() WARNING: at net/ipv4/inet_timewait_sock.c:141 __inet_twsk_hashdance+0x48/0x128() Modules linked in: arc4 ecb carl9170 rt2870sta(C) mac80211 r8712u(C) crc_ccitt ah [<c0038850>] (unwind_backtrace+0x0/0xec) from [<c0055364>] (warn_slowpath_common) [<c0055364>] (warn_slowpath_common+0x4c/0x64) from [<c0055398>] (warn_slowpath_n) [<c0055398>] (warn_slowpath_null+0x1c/0x24) from [<c02b72d0>] (__inet_twsk_hashd) [<c02b72d0>] (__inet_twsk_hashdance+0x48/0x128) from [<c031caa0>] (dccp_time_wai) [<c031caa0>] (dccp_time_wait+0x40/0xc8) from [<c031c15c>] (dccp_rcv_state_proces) [<c031c15c>] (dccp_rcv_state_process+0x120/0x538) from [<c032609c>] (dccp_v4_do_) [<c032609c>] (dccp_v4_do_rcv+0x11c/0x14c) from [<c0286594>] (release_sock+0xac/0) [<c0286594>] (release_sock+0xac/0x110) from [<c031fd34>] (dccp_close+0x28c/0x380) [<c031fd34>] (dccp_close+0x28c/0x380) from [<c02d9a78>] (inet_release+0x64/0x70) The fix is by testing the socket state first. Receiving a packet in Closed state now also produces the required "No connection" Reset reply of RFC 4340, 8.3.1. Reported-and-tested-by: Johan Hovold <jhovold@gmail.com> Cc: stable@kernel.org Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: David S. Miller <davem@davemloft.net>		2011-03-01 23:02:07 -08:00
..
ccids
ackvec.c
ackvec.h
ccid.c
ccid.h
dccp.h	dccp: fix bug in updating the GSR	2011-01-07 12:22:43 +01:00
diag.c
feat.c
feat.h
input.c	dccp: fix oops on Reset after close	2011-03-01 23:02:07 -08:00
ipv4.c
ipv6.c
ipv6.h
Kconfig
Makefile	dccp: Policy-based packet dequeueing infrastructure	2010-12-07 13:47:12 +01:00
minisocks.c
options.c
output.c	dccp: Policy-based packet dequeueing infrastructure	2010-12-07 13:47:12 +01:00
probe.c
proto.c	dccp qpolicy: Parameter checking of cmsg qpolicy parameters	2010-12-07 13:47:12 +01:00
qpolicy.c	dccp qpolicy: Parameter checking of cmsg qpolicy parameters	2010-12-07 13:47:12 +01:00
sysctl.c	dccp: make upper bound for seq_window consistent on 32/64 bit	2011-01-07 12:22:44 +01:00
timer.c