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Koki Sanagi ec764bf083 net: tracepoint of net_dev_xmit sees freed skb and causes panic 
Because there is a possibility that skb is kfree_skb()ed and zero cleared
after ndo_start_xmit, we should not see the contents of skb like skb->len and
skb->dev->name after ndo_start_xmit. But trace_net_dev_xmit does that
and causes panic by NULL pointer dereference.
This patch fixes trace_net_dev_xmit not to see the contents of skb directly.

If you want to reproduce this panic,

1. Get tracepoint of net_dev_xmit on
2. Create 2 guests on KVM
2. Make 2 guests use virtio_net
4. Execute netperf from one to another for a long time as a network burden
5. host will panic(It takes about 30 minutes)

Signed-off-by: Koki Sanagi <sanagi.koki@jp.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-02 14:06:31 -07:00
..
9p Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
802 snap: remove one synchronize_net() 2011-05-23 16:29:24 -04:00
8021q vlan: fix typo in vlan_dev_hard_start_xmit() 2011-06-01 21:08:47 -07:00
appletalk appletalk: Fix OOPS in atalk_release(). 2011-03-31 18:59:10 -07:00
atm atm: expose ATM device index in sysfs 2011-05-27 13:07:21 -04:00
ax25 ax25: Fix set-but-unused variable. 2011-04-17 00:48:31 -07:00
batman-adv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
bluetooth Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2011-05-23 09:10:03 -07:00
bridge Merge branch 'pablo/nf-2.6-updates' of git://1984.lsi.us.es/net-2.6 2011-05-27 13:04:40 -04:00
caif caif: Fix race when conditionally taking rtnl lock 2011-06-01 21:13:53 -07:00
can can: convert to %pK for kptr_restrict support 2011-05-26 14:23:35 -04:00
ceph libceph: fix ceph_osdc_alloc_request error checks 2011-05-03 09:28:13 -07:00
core net: tracepoint of net_dev_xmit sees freed skb and causes panic 2011-06-02 14:06:31 -07:00
dcb net: dcbnl: Update copyright dates 2011-03-14 17:02:42 -07:00
dccp ipv4: Make caller provide flowi4 key to inet_csk_route_req(). 2011-05-18 18:32:03 -04:00
decnet Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
dns_resolver DNS: Fix a NULL pointer deref when trying to read an error key [CVE-2011-1076] 2011-03-04 09:56:19 +11:00
dsa Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2011-05-05 14:59:02 -07:00
econet econet: Fix set-but-unused variable. 2011-04-17 00:15:22 -07:00
ethernet
ieee802154 ieee802154: Remove hacked CFLAGS in net/ieee802154/Makefile 2011-04-12 15:33:23 -07:00
ipv4 net/ipv4: Check for mistakenly passed in non-IPv4 address 2011-06-01 21:05:22 -07:00
ipv6 net: convert %p usage to %pK 2011-05-24 01:13:12 -04:00
ipx ipx: fix ipx_release() 2011-03-21 18:16:39 -07:00
irda irda: Fix error propagation in ircomm_lmp_connect_response() 2011-05-19 18:58:39 -04:00
iucv convert old cpumask API into new one 2011-05-13 14:55:21 -04:00
key net: convert %p usage to %pK 2011-05-24 01:13:12 -04:00
l2tp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
lapb
llc llc: Fix length check in llc_fixup_skb(). 2011-04-11 18:59:05 -07:00
mac80211 Merge git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-05-27 15:18:35 -04:00
netfilter IPVS: bug in ip_vs_ftp, same list heaad used in all netns. 2011-05-27 13:37:46 +02:00
netlabel Remove prefetch() from <linux/skbuff.h> and "netlabel_addrlist.h" 2011-05-22 21:43:41 -07:00
netlink net: convert %p usage to %pK 2011-05-24 01:13:12 -04:00
netrom NET: AX.25, NETROM, ROSE: Remove SOCK_DEBUG calls 2011-04-14 00:20:07 -07:00
packet af-packet: Add flag to distinguish VID 0 from no-vlan. 2011-06-01 21:18:03 -07:00
phonet net: convert %p usage to %pK 2011-05-24 01:13:12 -04:00
rds Fix common misspellings 2011-03-31 11:26:23 -03:00
rfkill net: rfkill: add generic gpio rfkill driver 2011-05-19 13:53:54 -04:00
rose NET: AX.25, NETROM, ROSE: Remove SOCK_DEBUG calls 2011-04-14 00:20:07 -07:00
rxrpc rxrpc: Fix set but unused variable 'usage' in rxrpc_get_transport() 2011-05-19 18:51:50 -04:00
sched sch_sfq: fix peek() implementation 2011-05-25 17:55:32 -04:00
sctp sctp: stop pending timers and purge queues when peer restart asoc 2011-05-31 15:29:17 -07:00
sunrpc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-05-23 09:12:26 -07:00
tipc tipc: Revise timings used when sending link request messages 2011-05-10 16:04:02 -04:00
unix net: convert %p usage to %pK 2011-05-24 01:13:12 -04:00
wanrouter Fix common misspellings 2011-03-31 11:26:23 -03:00
wimax
wireless Merge git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-05-27 15:18:35 -04:00
x25 Fix common misspellings 2011-03-31 11:26:23 -03:00
xfrm Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-3.6 2011-05-11 14:26:58 -04:00
compat.c net: Add sendmmsg socket system call 2011-05-05 11:10:14 -07:00
Kconfig bpf: depends on MODULES 2011-04-29 10:20:53 -07:00
Makefile net: Enter net/ipv6/ even if CONFIG_IPV6=n 2011-03-07 12:50:52 -08:00
nonet.c
socket.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
sysctl_net.c
TUNABLE