On Tue, Mar 02, 2010 at 09:25:43AM +0100, Michal Hocko wrote: > On Tue, Mar 02, 2010 at 01:06:06AM +0100, Rafael J. Wysocki wrote: > > On Monday 01 March 2010, Michal Hocko wrote: > > > [Let's CC mm guys] > > > > I guess it's rather architecture-related than a genering mm issue. > > > > > On Mon, Mar 01, 2010 at 10:07:37PM +0100, Rafael J. Wysocki wrote: > > > > On Monday 01 March 2010, Michal Hocko wrote: > > > > > Hi, > > > > > > > > > > I have experienced the following kernel BUG on resume from suspend from > > > > > disk (the whole log from hibarnation to suspend along with kernel > > > > > config are attached): > > > > > > > > > > BUG: unable to handle kernel paging request at 00aaaaaa > > > > > IP: [<c019e28c>] anon_vma_link+0x2c/0x39 > > > > > *pde = 00000000 > > > > > Oops: 0002 [#1] PREEMPT SMP > > > > > last sysfs file: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0003:00/power_supply/AC/type > > > > > Modules linked in: aes_i586 aes_generic iwl3945 iwlcore mac80211 cfg80211 fbcon font bitblit softcursor i915 drm_kms_helper drm fb i2c_algo_bit cfbcopyarea i2c_core cfbimgblt cfbfillrect fuse tun coretemp hwmon snd_hda_codec_realtek snd_hda_intel snd_hda_codec arc4 ecb snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_oss snd_seq_midi_event snd_seq snd_timer fujitsu_laptop snd_seq_device rtc_cmos rtc_core led_class rtc_lib snd snd_page_alloc video backlight output [last unloaded: cfg80211] > > > > > > > > > > Pid: 3942, comm: kxkb Not tainted 2.6.33-00001-gbaac35c #11 FJNB1B5/LIFEBOOK S7110 > > > > > EIP: 0060:[<c019e28c>] EFLAGS: 00010246 CPU: 1 > > > > > EIP is at anon_vma_link+0x2c/0x39 > > > > > EAX: 00aaaaaa EBX: f69c6410 ECX: f69c6414 EDX: f63e4df4 > > > > > ESI: f63e4dc0 EDI: f63e4e14 EBP: f6901ec0 ESP: f6901eb8 > > > > > DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 > > > > > Process kxkb (pid: 3942, ti=f6901000 task=f6aa6ff0 task.ti=f6901000) > > > > > Stack: > > > > > f63e4dc0 f23fc7e4 f6901efc c012fc28 f6aa6ff0 f63e4e30 f63e4e34 f63e4e24 > > > > > <0> ca4656f4 f6ace734 f6aa6ff0 f6ace700 ca4656c0 f23fc790 ca560000 fffffff4 > > > > > <0> f659ef94 f6901f38 c0130821 f6aa6ff0 f6901fb4 bff441f0 ca560208 00000000 > > > > > Call Trace: > > > > > [<c012fc28>] ? dup_mm+0x1c7/0x3d3 > > > > > [<c0130821>] ? copy_process+0x98e/0xf26 > > > > > [<c0130ed6>] ? do_fork+0x11d/0x2a1 > > > > > [<c0434547>] ? _raw_spin_unlock+0x14/0x28 > > > > > [<c01b6795>] ? set_close_on_exec+0x45/0x4b > > > > > [<c01b6e98>] ? do_fcntl+0x15f/0x3f1 > > > > > [<c0108678>] ? sys_clone+0x20/0x25 > > > > > [<c010291d>] ? ptregs_clone+0x15/0x38 > > > > > [<c0102850>] ? sysenter_do_call+0x12/0x26 > > > > > Code: 89 e5 56 53 0f 1f 44 00 00 8b 58 3c 89 c6 85 db 74 22 89 d8 e8 54 65 29 00 8b 43 08 8d 56 34 8d 4b 04 89 53 08 89 4e 34 89 46 38 <89> 10 89 d8 e8 9e 62 29 00 5b 5e 5d c3 55 89 e5 0f 1f 44 00 00 > > > > > EIP: [<c019e28c>] anon_vma_link+0x2c/0x39 SS:ESP 0068:f6901eb8 > > > > > CR2: 0000000000aaaaaa > > > > > ---[ end trace b7f008b0e5aa7c65 ]--- > > > > > > > > This looks like a low-level memory management issue of some sort. > > > > > > Yes, it really looks strange. dup_mm+0x1c7 matches to: > > > c102fc0e: 81 60 14 ff df ff ff andl $0xffffdfff,0x14(%eax) > > > c102fc15: 8b 45 ec mov -0x14(%ebp),%eax > > > c102fc18: c7 43 0c 00 00 00 00 movl $0x0,0xc(%ebx) > > > c102fc1f: 89 03 mov %eax,(%ebx) > > > c102fc21: 89 d8 mov %ebx,%eax > > > c102fc23: e8 38 e6 06 00 call c109e260 <anon_vma_link> > > > c102fc28: 8b 43 48 mov 0x48(%ebx),%eax <<< BANG > > > > > > which corresponds to: > > > kernel/fork.c:336 > > > tmp->vm_flags &= ~VM_LOCKED; > > > tmp->vm_mm = mm; > > > tmp->vm_next = NULL; > > > anon_vma_link(tmp); > > > file = tmp->vm_file; <<< BANG > > > > > > ebx is tmp which somehow got deallocated. I cannot see how this could happened. > > > > Through a page tables corruption or a TLB issue, for example. > > I thought so. Is there any other possibility? Like a race with vma > unlinking? It really looks like some memory corruption. Now I got the following: BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<c026db57>] strcmp+0xe/0x22 *pde = 00000000 Oops: 0000 [#1] PREEMPT SMP last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:08:03.4/fw-host0/00000e1003d248c6/uevent Modules linked in: fbcon font bitblit softcursor i915 drm_kms_helper drm fb i2c_algo_bit cfbcopyarea i2c on snd_hda_codec_realtek arc4 ecb snd_hda_intel snd_hda_codec snd_pcm_oss snd_mixer_oss snd_pcm iwl3945 d_timer snd_seq_device mac80211 snd fujitsu_laptop rtc_cmos cfg80211 rtc_core rtc_lib led_class snd_page i_wait_scan] Pid: 16719, comm: udev-acl.ck Not tainted 2.6.33-00001-gbaac35c #11 FJNB1B5/LIFEBOOK S7110 EIP: 0060:[<c026db57>] EFLAGS: 00010286 CPU: 0 EIP is at strcmp+0xe/0x22 EAX: 00000000 EBX: f71c0600 ECX: f70d0f00 EDX: f5a1d49c ESI: 00000000 EDI: f5a1d49c EBP: f70d0dec ESP: f70d0de4 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Process udev-acl.ck (pid: 16719, ti=f70d0000 task=f6a65710 task.ti=f70d0000) Stack: f5a1d49c fffffffe f70d0dfc c01ea0c0 f5a1d440 f71c05a0 f70d0e14 c01ea267 <0> f5a1d330 c044cfac f70d0f00 f6f44968 f70d0e3c c01b3a14 f70fcc80 f70d0e7c <0> f6f449e0 f5a1d330 f5a1d440 f70d0f00 f6f44968 087bed70 f70d0e90 c01b508a Call Trace: [<c01ea0c0>] ? sysfs_find_dirent+0x1b/0x2c [<c01ea267>] ? sysfs_lookup+0x2f/0xa6 [<c01b3a14>] ? do_lookup+0xca/0x174 [<c01b508a>] ? link_path_walk+0x691/0xa22 [<c01bf3e8>] ? mntput_no_expire+0x1e/0xb2 [<c01b552c>] ? path_walk+0x3f/0x89 [<c01b3dd1>] ? path_init+0x73/0x114 [<c01b5601>] ? do_path_lookup+0x26/0x47 [<c01b6072>] ? do_filp_open+0xdc/0x79e [<c01899d0>] ? free_hot_page+0x55/0x59 [<c01eaad0>] ? sysfs_put_link+0x0/0x1f [<c0189a6b>] ? free_pages+0x22/0x24 [<c01b3d54>] ? generic_readlink+0x69/0x73 [<c04371c9>] ? add_preempt_count+0x8/0x75 [<c0437155>] ? sub_preempt_count+0x8/0x74 [<c0434547>] ? _raw_spin_unlock+0x14/0x28 [<c01aae0a>] ? do_sys_open+0x4d/0xe9 [<c01aad0e>] ? filp_close+0x56/0x60 [<c01aaef2>] ? sys_open+0x23/0x2b [<c0102850>] ? sysenter_do_call+0x12/0x26 Code: 31 c0 83 c9 ff f2 ae 4f 89 d1 49 78 06 ac aa 84 c0 75 f7 31 c0 aa 89 d8 5b 5e 5f 5d c3 55 89 e5 57 56 0f 1f 44 00 00 89 c6 89 d7 <ac> ae 75 08 84 c0 75 f8 31 c0 eb 04 19 c0 0c 01 5e 5f 5d c3 55 EIP: [<c026db57>] strcmp+0xe/0x22 SS:ESP 0068:f70d0de4 CR2: 0000000000000000 ---[ end trace 877af85bb64785ae ]--- > > > > > > > What's the HEAD commit in this kernel tree? > > > > > > $ git describe > > > v2.6.33-1-gbaac35c > > > > I can't find gbaac35c anywhere post 2.6.33. > > you should look at baac35c. Git describe displays gHASH > > > Can you just send the output > > of "git show | head -1", please? > > The whole commit ID is baac35c4155a8aa826c70acee6553368ca5243a2 > > > > > > > Also, is the problem reproducible? > > > > > > As I've already mentioned. This is the first time I have seen this problem. > > > I am using suspend to disk and wake up quite often (several times a day). I > > > haven't tried suspend/resume loop test yet. > > > > OK > > > > Given the apparent nature of the problem it will be extremely difficult to > > track down without a reliable way to reproduce it. > > Yes, I am aware of that but maybe someone will face the same problem. > Let's see whether I am able to reproduce. > > > > > Rafael > > -- > Michal Hocko -- Michal Hocko _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
