Messages in this thread |  | | Date | Mon, 16 Jun 2008 14:10:11 +0200 | From | Patrick McHardy <> | Subject | Re: 2.6.26-git: NULL pointer deref in __switch_to |
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Patrick McHardy wrote: > Simon Holm Th������������������������ wrote: >> fre, 13 06 2008 kl. 15:47 -0700, skrev Suresh Siddha: >>> On Fri, Jun 13, 2008 at 11:24:01AM -0700, Vegard Nossum wrote: >>> >>> I have a theory for your problem and have appended a patch to test >>> it. Can >>> you please check if the appended patch fixes your problem. >>> >> At least for me, with this patch applied on top of -rc4 or -rc6+ the >> problem still triggered after running an lguest guest for less than 30 >> seconds (the guest didn't even finish the boot of an image of Ubuntu >> with no X-server). > > > The patch also didn't fix the problem here, I got the same crash this > morning. Unfortunately netconsole didn't log it, but its essentially > the same as the one I posted.
I just got this oops. It didn't bring the machine down this time and the Oops in math_state_restore() is new, maybe it helps in determining the cause. One of the lguest guests is dead since the oops, so this really seems to be lguest-related:
[47853.037829] BUG: unable to handle kernel NULL pointer dereference at 00000000 [47853.037861] IP: [<c0104910>] math_state_restore+0x21/0x60 [47853.037887] *pde = 00000000 [47853.037904] Oops: 0000 [#1] PREEMPT [47853.037921] Modules linked in: nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs sch_red cls_fw cls_flow tun sit tunnel4 sch_drr sch_hfsc af_packet xt_statistic xt_CONNMARK xt_connmark xt_length xt_owner xt_MARK ip6table_mangle ipt_MASQUERADE ipt_REDIRECT ipt_TTL iptable_mangle iptable_nat nf_nat_sip nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_nat nf_conntrack_ftp ip6t_hl ip6t_REJECT ip6t_ah ip6table_filter ipt_ttl ipt_REJECT xt_limit ipt_ah xt_esp xt_state xt_TCPMSS xt_tcpmss xt_helper xt_tcpudp xt_hashlimit iptable_filter ip6table_raw ip6_tables xt_policy xt_NFLOG iptable_raw ip_tables x_tables nfnetlink_log nfnetlink nf_conntrack_ipv6 nf_conntrack_ipv4 nf_conntrack_sip nf_conntrack deflate zlib_deflate zlib_inflate ctr twofish twofish_common camellia serpent blowfish des_generic xcbc sha256_generic sha1_generic crypto_null af_key cbc dm_crypt crypto_blkcipher dm_snapshot dm_mod lg cpufreq_ondemand p4_clockmod speedstep_lib aes_i586 aes_generic esp6 esp4 aead usblp ehci_hcd parport_pc parport ohci_hcd rtc sata_promise e1000 usbcore unix [47853.038009] [47853.038009] Pid: 14374, comm: sleep Not tainted (2.6.26-rc6 #7) [47853.038009] EIP: 0060:[<c0104910>] EFLAGS: 00010002 CPU: 0 [47853.038009] EIP is at math_state_restore+0x21/0x60 [47853.038009] EAX: 00000000 EBX: f5e2a6c0 ECX: 00000000 EDX: 00000000 [47853.038009] ESI: e1256000 EDI: 00000001 EBP: e1256fb0 ESP: e1256fa8 [47853.038009] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 [47853.038009] Process sleep (pid: 14374, ti=e1256000 task=f5e2a6c0 task.ti=e1256000) [47853.038009] Stack: bf84ddf4 0804c8e0 bf84dd58 c0104753 bf84ddf4 00000000 b7f220f8 0804c8e0 [47853.038009] 00000001 bf84dd58 00000000 0000007b 0000007b c0320000 ffffffff 08048e7b [47853.038009] 00000073 00010202 bf84dd00 0000007b 00002067 00001067 [47853.038009] Call Trace: [47853.038009] [<c0104753>] ? device_not_available+0x43/0x48 [47853.038009] [<c0320000>] ? quirk_usb_early_handoff+0x1eb/0x44b [47853.038009] ======================= [47853.038009] Code: af 3c c0 e8 1e 8a 01 00 c9 c3 55 89 e5 56 53 89 e6 81 e6 00 f0 ff ff 8b 1e f6 43 0d 20 74 1e 0f 06 0f 1f 40 00 8b 83 6c 02 00 00 <0f> ae 08 83 4e 0c 01 80 83 90 00 00 00 01 5b 5e 5d c3 fb 0f 1f [47853.038009] EIP: [<c0104910>] math_state_restore+0x21/0x60 SS:ESP 0068:e1256fa8 [47853.038009] ---[ end trace 11728688d676f153 ]--- [47853.039213] BUG: unable to handle kernel NULL pointer dereference at 000001ff [47853.039328] IP: [<c0102aab>] __switch_to+0x2f/0x118 [47853.039409] *pde = 00000000 [47853.039484] Oops: 0002 [#2] PREEMPT [47853.039591] Modules linked in: nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs sch_red cls_fw cls_flow tun sit tunnel4 sch_drr sch_hfsc af_packet xt_statistic xt_CONNMARK xt_connmark xt_length xt_owner xt_MARK ip6table_mangle ipt_MASQUERADE ipt_REDIRECT ipt_TTL iptable_mangle iptable_nat nf_nat_sip nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_nat nf_conntrack_ftp ip6t_hl ip6t_REJECT ip6t_ah ip6table_filter ipt_ttl ipt_REJECT xt_limit ipt_ah xt_esp xt_state xt_TCPMSS xt_tcpmss xt_helper xt_tcpudp xt_hashlimit iptable_filter ip6table_raw ip6_tables xt_policy xt_NFLOG iptable_raw ip_tables x_tables nfnetlink_log nfnetlink nf_conntrack_ipv6 nf_conntrack_ipv4 nf_conntrack_sip nf_conntrack deflate zlib_deflate zlib_inflate ctr twofish twofish_common camellia serpent blowfish des_generic xcbc sha256_generic sha1_generic crypto_null af_key cbc dm_crypt crypto_blkcipher dm_snapshot dm_mod lg cpufreq_ondemand p4_clockmod speedstep_lib aes_i586 aes_generic esp6 esp4 aead usblp ehci_hcd parport_pc parport ohci_hcd rtc sata_promise e1000 usbcore unix [47853.040119] [47853.040119] Pid: 14374, comm: sleep Tainted: G D (2.6.26-rc6 #7) [47853.040119] EIP: 0060:[<c0102aab>] EFLAGS: 00010002 CPU: 0 [47853.040119] EIP is at __switch_to+0x2f/0x118 [47853.040119] EAX: 00000000 EBX: f60a39b8 ECX: f5e2a6c0 EDX: f60a37a0 [47853.040119] ESI: f60a37a0 EDI: f5e2a6c0 EBP: f06cded0 ESP: f06cdec0 [47853.040119] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 [47853.040119] Process sleep (pid: 14374, ti=f06cd000 task=f5e2a6c0 task.ti=e1256000) [47853.040119] Stack: f5e2a8d8 f60a37a0 f5079300 f5079c00 e1256eac c0321c5c f06cdf00 00000086 [47853.040119] c047f8e0 c1774a00 3ba50065 f60a37a0 f60a38f4 ffffffea 00000004 f60a3798 [47853.040119] f06cdf78 c011edbf f5e2a6c0 3ba50065 f60a37a0 f5079300 00000000 f60a3888 [47853.040119] Call Trace: [47853.040119] [<c0321c5c>] ? schedule+0x1a6/0x30f [47853.040119] [<c011edbf>] ? do_wait+0x5b2/0xb8d [47853.040119] [<c0118c39>] ? default_wake_function+0x0/0xd [47853.040119] [<c011f3ff>] ? sys_wait4+0x65/0xa2 [47853.040119] [<c011f463>] ? sys_waitpid+0x27/0x29 [47853.040119] [<c0103c5a>] ? syscall_call+0x7/0xb [47853.040119] [<c0320000>] ? quirk_usb_early_handoff+0x1eb/0x44b [47853.040119] ======================= [47853.040119] Code: 56 53 83 ec 04 89 c7 89 d6 8d 80 18 02 00 00 89 45 f0 8d 9a 18 02 00 00 8b 47 04 f6 40 0c 01 0f 84 c9 00 00 00 8b 87 6c 02 00 00 <0f> ae 00 0f ba 60 02 07 73 02 db e2 0f 1f 00 90 8d b4 26 00 00 [47853.040119] EIP: [<c0102aab>] __switch_to+0x2f/0x118 SS:ESP 0068:f06cdec0 [47853.040119] ---[ end trace 11728688d676f153 ]--- [47853.040119] Fixing recursive fault but reboot is needed! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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