Date:	Mon, 12 Feb 2007 21:20:49 +0300
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Charles-Edouard Ruault <ce@...ult.com>
Cc:	netdev@...r.kernel.org
Subject: Re: [BUG] 2.6.20 Oopses in xfrm_audit_log

[removing l-k from CC, and switching to netdev]

Please, send your .config.
Is it reproducible?

On Mon, Feb 12, 2007 at 03:16:04PM +0100, Charles-Edouard Ruault wrote:
> i upgraded to vanilla kernel 2.6.20 and while i was using strongswan 
> 2.8.2 to setup an IPSEC VPN i got the following kernel Ooops.
> I had successfully established the same tunnel a few times, but key 
> renegotiation caused a problem ( both ends did not renegotiate at the 
> same time so the tunnel was frozen ), i decided to kill the tunnel and 
> start a new one ( using ipsec auto --down tunnel & ipsec auto --up 
> tunnel ), while i was doing so, i got the oops.
> 
> BUG: unable to handle kernel NULL pointer dereference at virtual address 
> 00000188
> printing eip:
> c02fb85c
> *pde = 00000000
> Oops: 0000 [#1]
> PREEMPT
> Modules linked in: xfrm4_mode_tunnel usblp deflate zlib_deflate twofish 
> twofish_common serpent blowfish des cbc ecb blkcipher xcbc sha256 sha1 
> crypto_null xfrm4_tunnel tunnel4 ipcomp esp4 ah4 af_key autofs4 asb100 
> hwmon_vid hidp rfcomm l2cap bluetooth sunrpc nf_conntrack_netbios_ns 
> ipt_LOG xt_limit xt_mark xt_state xt_tcpudp iptable_filter 
> ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 xt_MARK 
> iptable_mangle ip_tables x_tables binfmt_misc sd_mod ipv6 sg hfsplus 
> video button ac lp parport_pc parport floppy nvram usb_storage scsi_mod 
> libusual usbhid hid ehci_hcd snd_via82xx snd_ac97_codec ac97_bus 
> ohci1394 snd_seq_dummy uhci_hcd ieee1394 snd_seq_oss snd_seq_midi_event 
> snd_seq snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_page_alloc 
> snd_mpu401_uart snd_rawmidi snd_seq_device snd via_agp agpgart 
> i2c_viapro soundcore eepro100 i2c_core b44 pcspkr mii shpchp usbcore dm_mod
> CPU:    0
> EIP:    0060:[<c02fb85c>]    Not tainted VLI
> EFLAGS: 00010246   (2.6.20 #1)
> EIP is at xfrm_audit_log+0x4cc/0x580
> eax: ecb71061   ebx: c039d160   ecx: 00000000   edx: 00000021
> esi: 000001f4   edi: 00000255   ebp: 00000000   esp: e8cd5a18
> ds: 007b   es: 007b   ss: 0068
> Process pluto (pid: 27486, ti=e8cd4000 task=d3557070 task.ti=e8cd4000)
> Stack: c17d2ea0 c0354bf1 e183f9c0 00000003 c03ac59c e1399800 00000001 
> 00000003
>       f8d0a450 00000000 00000001 00000286 e8cd5a6c c011506b 00000000 
> 00000286
>       f73cb8c0 00000246 c17d2ea0 00000000 00000000 f73cb8c0 f8d03c67 
> 00000000
> Call Trace:
> [<c011506b>] __wake_up+0x4b/0x80
> [<f8d03c67>] pfkey_broadcast+0x137/0x1b0 [af_key]
> [<f8d03e5f>] pfkey_send_policy_notify+0xef/0x1a0 [af_key]
> [<c011d90e>] local_bh_enable+0x2e/0xa0
> [<c0306107>] xfrm_get_policy+0x2b7/0x2f0
> [<c0305e50>] xfrm_get_policy+0x0/0x2f0
> [<c0304702>] xfrm_user_rcv_msg+0x102/0x1b0
> [<c0304600>] xfrm_user_rcv_msg+0x0/0x1b0
> [<c02b3782>] netlink_run_queue+0x82/0x120
> [<c03045e8>] xfrm_netlink_rcv+0x28/0x40
> [<c02b3d42>] netlink_data_ready+0x12/0x50
> [<c02b2931>] netlink_sendskb+0x21/0x40
> [<c02b3c50>] netlink_sendmsg+0x230/0x310
> [<c02993cd>] sock_aio_write+0x11d/0x130
> [<c01d538a>] avc_has_perm+0x5a/0x70
> [<c0163ed5>] do_sync_write+0xd5/0x120
> [<c012c960>] autoremove_wake_function+0x0/0x50
> [<c01648c7>] vfs_write+0x177/0x180
> [<c0164ea1>] sys_write+0x41/0x70
> [<c0102f14>] syscall_call+0x7/0xb
> =======================
> Code: 8b 44 24 70 c1 e2 08 c1 e8 08 09 c2 0f b7 c2 89 44 24 08 8b 44 24 
> 48 89 04 24 e8 10 eb e3 ff e9 bc fc ff ff 8b 8c 24 c0 00 00 00 <8b> 91 
> 88 01 00 00 0f b7 99 82 00 00 00 85 d2 0f 85 64 fc ff ff
> EIP: [<c02fb85c>] xfrm_audit_log+0x4cc/0x580 SS:ESP 0068:e8cd5a18
> 
> I'm running a vanilla 2.6.20 kernel on a Fedora Core 5 box on an athlon 
> processor:
> cat /proc/cpuinfo
> processor       : 0
> vendor_id       : AuthenticAMD
> cpu family      : 6
> model           : 8
> model name      : AMD Athlon(TM) XP 2400+
> stepping        : 1
> cpu MHz         : 2000.256
> cache size      : 256 KB
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 1
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
> mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow ts
> bogomips        : 4003.78
> clflush size    : 32
> 
> uname -a
> Linux machine 2.6.20 #1 PREEMPT Sat Feb 10 13:48:56 CET 2007 i686 athlon 
> i386 GNU/Linux
> 
> Please CC me in follow ups since i do not subscribe to the list.

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