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SubjectRe: Ugly rmap NULL ptr deref oopsie on hibernate (was Linux 2.6.34-rc3)
From: Rik van Riel <riel@redhat.com>
Date: Tue, Apr 06, 2010 at 09:18:28PM -0400

Hi Rik,

I think your patch needs a bit more baking, see below :)

> >I suspect Borislav is sleeping. But at least we have a patch for him to
> >test when he wakes up ;)
>
> I am looking forward to the test results.

This happens when starting X, I haven't even started hibernating.

[By the way, further testing will have to wait till tonight since I
have a job, you know :) ]

Also, mm/rmap.c:745 is

BUG_ON(!anon_vma);

in __page_set_anon_rmap().

---
[ 43.142371] ------------[ cut here ]------------
[ 43.142411] kernel BUG at mm/rmap.c:745!
[ 43.142436] invalid opcode: 0000 [#1] PREEMPT SMP
[ 43.142514] last sysfs file: /sys/devices/virtual/vtconsole/vtcon0/uevent
[ 43.142537] CPU 0
[ 43.142559] Modules linked in: powernow_k8 cpufreq_ondemand cpufreq_powersave cpufreq_userspace freq_table cpufreq_conservative binfmt_misc kvm_amd kvm ipv6 vfat fat dm_crypt dm_mod 8250_pnp 8250 edac_core serial_core k10temp ohci_hcd pcspkr
[ 43.142997]
[ 43.143012] Pid: 1940, comm: console-kit-dae Not tainted 2.6.34-rc3-00289-gae1ed76 #5 M3A78 PRO/System Product Name
[ 43.143012] RIP: 0010:[<ffffffff810c08e7>] [<ffffffff810c08e7>] page_add_new_anon_rmap+0x3b/0x89
[ 43.143012] RSP: 0000:ffff88022c019da8 EFLAGS: 00010246
[ 43.143012] RAX: 0000000000000000 RBX: ffffea000774ff78 RCX: 000000002ce900f4
[ 43.143012] RDX: ffff88000a1d5dc8 RSI: 0000000000000007 RDI: ffffffff816e8740
[ 43.143012] RBP: ffff88022c019dc8 R08: 00007f29e3cfd928 R09: 000000000062c318
[ 43.143012] R10: 0000000000000000 R11: 0000000000000002 R12: ffff88022bbad960
[ 43.143012] R13: 00007f29e3cfd928 R14: 00007f29e3cfd928 R15: 80000002216d9067
[ 43.143012] FS: 00007f29e3d0f790(0000) GS:ffff88000a000000(0000) knlGS:0000000000000000
[ 43.143012] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 43.143012] CR2: 00007f29e3cfd928 CR3: 000000022dfd3000 CR4: 00000000000006f0
[ 43.143012] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 43.143012] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 43.143012] Process console-kit-dae (pid: 1940, threadinfo ffff88022c018000, task ffff88022ce90000)
[ 43.143012] Stack:
[ 43.143012] ffffffff810b8802 ffff88022bbad960 ffff88022ea3c600 ffff88022bb6d7e8
[ 43.143012] <0> ffff88022c019e48 ffffffff810b8823 ffff88022ea3c6b8 0000000000000246
[ 43.143012] <0> ffffea000774ff78 0000000000000001 00000001e3cfd928 ffff88022fdb58f0
[ 43.143012] Call Trace:
[ 43.143012] [<ffffffff810b8802>] ? handle_mm_fault+0x2af/0x64e
[ 43.143012] [<ffffffff810b8823>] handle_mm_fault+0x2d0/0x64e
[ 43.143012] [<ffffffff8101f392>] do_page_fault+0x30b/0x32d
[ 43.143012] [<ffffffff810615ce>] ? put_lock_stats+0xe/0x27
[ 43.143012] [<ffffffff81062a55>] ? lock_release_holdtime+0x104/0x109
[ 43.143012] [<ffffffff813f93e3>] ? error_sti+0x5/0x6
[ 43.143012] [<ffffffff813f7de2>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[ 43.143012] [<ffffffff813f91ff>] page_fault+0x1f/0x30
[ 43.143012] Code: 00 00 48 89 fb 49 89 f4 49 89 d5 f0 80 4f 02 10 be 07 00 00 00 c7 47 0c 00 00 00 00 e8 c5 30 ff ff 49 8b 44 24 78 48 85 c0 75 04 <0f> 0b eb fe 48 ff c0 4c 89 e6 48 89 df 48 89 43 18 4d 2b 6c 24
[ 43.143012] RIP [<ffffffff810c08e7>] page_add_new_anon_rmap+0x3b/0x89
[ 43.143012] RSP <ffff88022c019da8>
[ 43.145276] ---[ end trace d6305f6e826dbd53 ]---
[ 43.145314] note: console-kit-dae[1940] exited with preempt_count 1
[ 73.644201] ------------[ cut here ]------------
[ 73.644218] kernel BUG at mm/rmap.c:745!
[ 73.644226] invalid opcode: 0000 [#2] PREEMPT SMP
[ 73.644266] last sysfs file: /sys/devices/system/cpu/cpu3/cpufreq/scaling_cur_freq
[ 73.644278] CPU 0
[ 73.644287] Modules linked in: powernow_k8 cpufreq_ondemand cpufreq_powersave cpufreq_userspace freq_table cpufreq_conservative binfmt_misc kvm_amd kvm ipv6 vfat fat dm_crypt dm_mod 8250_pnp 8250 edac_core serial_core k10temp ohci_hcd pcspkr
[ 73.644509]
[ 73.644520] Pid: 2018, comm: iceowl-bin Tainted: G D 2.6.34-rc3-00289-gae1ed76 #5 M3A78 PRO/System Product Name
[ 73.644534] RIP: 0010:[<ffffffff810c08e7>] [<ffffffff810c08e7>] page_add_new_anon_rmap+0x3b/0x89
[ 73.644553] RSP: 0000:ffff88022cd37da8 EFLAGS: 00010246
[ 73.644562] RAX: 0000000000000000 RBX: ffffea000764dfa8 RCX: 0000000000000002
[ 73.644572] RDX: ffff88000a1d5dc8 RSI: 0000000000000007 RDI: ffffffff816e8740
[ 73.644589] RBP: ffff88022cd37dc8 R08: 00007f2ce0aab928 R09: 0000000000000000
[ 73.644603] R10: 0000000000000000 R11: 000000000011da32 R12: ffff88022d5894b0
[ 73.644615] R13: 00007f2ce0aab928 R14: 00007f2ce0aab928 R15: 800000021cd23067
[ 73.644628] FS: 00007f2cee88b7b0(0000) GS:ffff88000a000000(0000) knlGS:0000000000000000
[ 73.644639] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 73.644652] CR2: 00007f2ce0aab928 CR3: 000000022b1b5000 CR4: 00000000000006f0
[ 73.644664] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 73.644675] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 73.644690] Process iceowl-bin (pid: 2018, threadinfo ffff88022cd36000, task ffff88022a74a5c0)
[ 73.644701] Stack:
[ 73.644708] ffffffff810b8802 ffff88022d5894b0 ffff88022ce41e00 ffff88022d4b0558
[ 73.644745] <0> ffff88022cd37e48 ffffffff810b8823 ffff88022ce41eb8 0000000000000246
[ 73.644801] <0> ffffea000764dfa8 0000000000000001 00000001e0aab928 ffff88022c0a4828
[ 73.644862] Call Trace:
[ 73.644874] [<ffffffff810b8802>] ? handle_mm_fault+0x2af/0x64e
[ 73.644885] [<ffffffff810b8823>] handle_mm_fault+0x2d0/0x64e
[ 73.644895] [<ffffffff8101f392>] do_page_fault+0x30b/0x32d
[ 73.644909] [<ffffffff810be3c2>] ? do_mmap_pgoff+0x290/0x2f3
[ 73.644921] [<ffffffff813f93e3>] ? error_sti+0x5/0x6
[ 73.644932] [<ffffffff81062b97>] ? trace_hardirqs_off_caller+0x1f/0xa9
[ 73.644943] [<ffffffff813f7de2>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[ 73.644952] [<ffffffff813f91ff>] page_fault+0x1f/0x30
[ 73.644963] Code: 00 00 48 89 fb 49 89 f4 49 89 d5 f0 80 4f 02 10 be 07 00 00 00 c7 47 0c 00 00 00 00 e8 c5 30 ff ff 49 8b 44 24 78 48 85 c0 75 04 <0f> 0b eb fe 48 ff c0 4c 89 e6 48 89 df 48 89 43 18 4d 2b 6c 24
[ 73.645001] RIP [<ffffffff810c08e7>] page_add_new_anon_rmap+0x3b/0x89
[ 73.645001] RSP <ffff88022cd37da8>
[ 73.645610] ---[ end trace d6305f6e826dbd54 ]---
[ 73.645621] note: iceowl-bin[2018] exited with preempt_count 1
[ 77.562222] SysRq : HELP : loglevel(0-9) reBoot Crash show-all-locks(D) terminate-all-tasks(E) memory-full-oom-kill(F) kill-all-tasks(I) thaw-filesystems(J) saK show-backtrace-all-active-cpus(L) show-memory-usage(M) nice-all-RT-tasks(N) powerOff show-registers(P) show-all-timers(Q) unRaw Sync show-task-states(T) Unmount show-blocked-tasks(W) dump-ftrace-buffer(Z)
[ 78.014120] SysRq : Emergency Sync
[ 78.016864] Emergency Sync complete
[ 78.585045] SysRq : Emergency Remount R/O
[ 78.663367] Emergency Remount complete
[ 79.098126] SysRq : Resetting

--
Regards/Gruss,
Boris.


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