Messages in this thread | | | Date | Fri, 7 Jun 2013 15:32:15 +0800 | From | Fengguang Wu <> | Subject | Re: [xfrm?] BUG: unable to handle kernel NULL pointer dereference at 00000004 |
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On Fri, Jun 07, 2013 at 09:02:43AM +0200, Steffen Klassert wrote: > On Thu, Jun 06, 2013 at 08:55:49PM +0800, Fengguang Wu wrote: > > Greetings, > > > > I got the below dmesg and the first bad commit is > > > > commit 4c4d41f200db375b2d2cc6d0a1de0606c8266398 > > Author: Fan Du <fan.du@windriver.com> > > Date: Thu Jun 6 10:15:54 2013 +0800 > > > > xfrm: add LINUX_MIB_XFRMACQUIREERROR statistic counter > > > > When host ping its peer, ICMP echo request packet triggers IPsec > > policy, then host negotiates SA secret with its peer. After IKE > > installed SA for OUT direction, but before SA for IN direction > > installed, host get ICMP echo reply from its peer. At the time > > being, the SA state for IN direction could be XFRM_STATE_ACQ, > > then the received packet will be dropped after adding > > LINUX_MIB_XFRMINSTATEINVALID statistic. > > > > Adding a LINUX_MIB_XFRMACQUIREERROR statistic counter for such > > scenario when SA in larval state is much clearer for user than > > LINUX_MIB_XFRMINSTATEINVALID which indicates the SA is totally > > bad. > > > > Signed-off-by: Fan Du <fan.du@windriver.com> > > Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> > > > > > > [ 157.721828] no cont in shutdown! > > [ 158.779481] floppy0: FDC access conflict! > > [ 159.555337] BUG: unable to handle kernel NULL pointer dereference at 00000004 > > [ 160.102544] IP: [<c1609ed5>] reset_interrupt+0x85/0x90 > > [ 160.102544] *pde = 00000000 > > [ 160.102544] Oops: 0000 [#1] PREEMPT SMP > > [ 160.102544] CPU: 1 PID: 89 Comm: kworker/u4:1 Not tainted 3.10.0-rc2-00597-g4c4d41f #3 > > [ 160.102544] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007 > > [ 160.102544] Workqueue: floppy reset_interrupt > > [ 160.102544] task: c5a5ad00 ti: c5b5c000 task.ti: c5b5c000 > > [ 160.102544] EIP: 0060:[<c1609ed5>] EFLAGS: 00010246 CPU: 1 > > [ 160.102544] EIP is at reset_interrupt+0x85/0x90 > > [ 160.102544] EAX: 00000000 EBX: cbd56600 ECX: c5a5ad00 EDX: 000003f4 > > [ 160.102544] ESI: c1ed0e40 EDI: c5a23200 EBP: c5b5debc ESP: c5b5deac > > [ 160.102544] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 > > [ 160.102544] CR0: 8005003b CR2: 00000004 CR3: 02037000 CR4: 00000690 > > [ 160.102544] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 > > [ 160.102544] DR6: ffff0ff0 DR7: 00000400 > > [ 160.102544] Stack: > > [ 178.765341] pcd0: Autoprobe failed > > [ 178.765373] pcd: No CD-ROM drive found > > > > Bisect log shows that > > - reverting the commit fixes the problem > > - linux-next is also impacted > > Strange, your config has neither XFRM nor INET enabled. So the code in > question should not be compiled into your kernel. Also your backtraces > don't show any networking related functions.
That's interesting... I'll redo the bisect..
> Fan, can you look into this please?
Thanks, Fengguang
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