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Date: Sat, 23 Oct 2010 21:19:05 +0200 From: Fabio Comolli <fabio.comolli@...il.com> To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Cc: "Rafael J. Wysocki" <rjw@...k.pl> Subject: Re: BUG: unable to handle kernel NULL pointer dereference at 0000000c (elv_quiesce_start) Well, different config, same action, another crash: [ 77.345978] usb 1-2: USB disconnect, address 2 [ 77.346276] BUG: unable to handle kernel NULL pointer dereference at 00000208 [ 77.346410] IP: [<c117271a>] disk_replace_part_tbl+0x19/0x47 [ 77.346513] *pde = 00000000 [ 77.346566] Oops: 0000 [#1] PREEMPT SMP [ 77.346645] last sysfs file: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/PNP0C0A:00/power_supply/BAT0/type [ 77.346800] Modules linked in: scsi_wait_scan [ 77.346879] [ 77.346909] Pid: 15, comm: khubd Not tainted 2.6.36+ #1 900/900 [ 77.347003] EIP: 0060:[<c117271a>] EFLAGS: 00010282 CPU: 0 [ 77.347026] EIP is at disk_replace_part_tbl+0x19/0x47 [ 77.347026] EAX: f581c600 EBX: f63c4720 ECX: 40000000 EDX: 00000000 [ 77.347026] ESI: 00000000 EDI: c15515ec EBP: f5812800 ESP: f60d5e1c [ 77.347026] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [ 77.347026] Process khubd (pid: 15, ti=f60d4000 task=f603f2c0 task.ti=f60d4000) [ 77.347026] Stack: [ 77.347026] f581c600 00000000 c1172793 00000000 c122a668 f581c658 c11795d6 f581c674 [ 77.347026] <0> c1179599 f61310b8 c117a3c2 f63ffb80 00000202 c124205f f63ffbac c124202d [ 77.347026] <0> c117a3c2 f6131188 c1552440 c122ab0e f6131188 f61310b8 00000282 c122aba9 [ 77.347026] Call Trace: [ 77.347026] [<c1172793>] ? disk_release+0x18/0x36 [ 77.347026] [<c122a668>] ? device_release+0x32/0x5e [ 77.347026] [<c11795d6>] ? kobject_release+0x3d/0x4f [ 77.347026] [<c1179599>] ? kobject_release+0x0/0x4f [ 77.347026] [<c117a3c2>] ? kref_put+0x36/0x3e [ 77.347026] [<c124205f>] ? sg_device_destroy+0x32/0x3b [ 77.347026] [<c124202d>] ? sg_device_destroy+0x0/0x3b [ 77.347026] [<c117a3c2>] ? kref_put+0x36/0x3e [ 77.347026] [<c122ab0e>] ? device_del+0xa0/0x133 [ 77.347026] [<c122aba9>] ? device_unregister+0x8/0x10 [ 77.347026] [<c123be13>] ? __scsi_remove_device+0x34/0x7e [ 77.347026] [<c123b2ea>] ? scsi_forget_host+0x32/0x4c [ 77.347026] [<c12354d5>] ? scsi_remove_host+0x5e/0xcb [ 77.347026] [<c1294929>] ? quiesce_and_remove_host+0x49/0x77 [ 77.347026] [<c12949ea>] ? usb_stor_disconnect+0x10/0x18 [ 77.347026] [<c128268a>] ? usb_unbind_interface+0x32/0xa3 [ 77.347026] [<c122ca90>] ? __device_release_driver+0x42/0x79 [ 77.347026] [<c122cadc>] ? device_release_driver+0x15/0x1e [ 77.347026] [<c122c7a1>] ? bus_remove_device+0x5f/0x6a [ 77.347026] [<c122ab5e>] ? device_del+0xf0/0x133 [ 77.347026] [<c1281994>] ? usb_disable_device+0x36/0xbc [ 77.347026] [<c127d27f>] ? usb_disconnect+0x69/0xc4 [ 77.347026] [<c127dd63>] ? hub_thread+0x314/0xa51 [ 77.347026] [<c127da4f>] ? hub_thread+0x0/0xa51 [ 77.347026] [<c1398689>] ? schedule+0x626/0x6a1 [ 77.347026] [<c103a9e8>] ? autoremove_wake_function+0x0/0x29 [ 77.347026] [<c127da4f>] ? hub_thread+0x0/0xa51 [ 77.347026] [<c103a727>] ? kthread+0x63/0x68 [ 77.347026] [<c103a6c4>] ? kthread+0x0/0x68 [ 77.347026] [<c1002c56>] ? kernel_thread_helper+0x6/0x10 [ 77.347026] Code: ff 70 b8 68 63 ed 4e c1 51 e8 9a ba 00 00 83 c4 0c c3 56 53 8b 58 30 8b b0 4c 01 00 00 85 db 89 50 30 74 32 c7 43 0c 00 00 00 00 <8b> 86 08 02 00 00 e8 e8 72 22 00 89 f0 e8 1f 97 ff ff 8b 86 08 [ 77.347026] EIP: [<c117271a>] disk_replace_part_tbl+0x19/0x47 SS:ESP 0068:f60d5e1c [ 77.347026] CR2: 0000000000000208 [ 77.428741] ---[ end trace f878ff60aa54a932 ]--- BTW, this is a regression from plain 2.6.36. On Sat, Oct 23, 2010 at 7:39 PM, Fabio Comolli <fabio.comolli@...il.com> wrote: > Hi all. > Freshly pulled Linus' tree. Removing an unmounted USB drive gave: > > [ 1379.802313] usb 1-3: USB disconnect, address 2 > [ 1379.802589] BUG: unable to handle kernel NULL pointer dereference at 0000000c > [ 1379.802724] IP: [<c1161f7f>] elv_quiesce_start+0x3/0x55 > [ 1379.802820] *pde = 00000000 > [ 1379.802873] Oops: 0000 [#1] PREEMPT > [ 1379.802940] last sysfs file: > /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/PNP0C0A:00/power_supply/BAT0/type > [ 1379.803012] Modules linked in: [last unloaded: scsi_wait_scan] > [ 1379.803012] > [ 1379.803012] [<c1167f40>] ? disk_replace_part_tbl+0x2b/0x51 > [ 1379.803012] [<c1167f7e>] ? disk_release+0x18/0x2b > [ 1379.803012] [<c12208f8>] ? device_release+0x32/0x5e > [ 1379.803012] [<c116ecbf>] ? kobject_release+0x3d/0x4f > [ 1379.803012] [<c116ec82>] ? kobject_release+0x0/0x4f > [ 1379.803012] [<c116fabc>] ? kref_put+0x35/0x3d > [ 1379.803012] [<c1239fe6>] ? sg_device_destroy+0x3f/0x48 > [ 1379.803012] [<c1239fa7>] ? sg_device_destroy+0x0/0x48 > [ 1379.803012] [<c116fabc>] ? kref_put+0x35/0x3d > [ 1379.803012] [<c1220d92>] ? device_del+0x9e/0x12f > [ 1379.803012] [<c1220e2b>] ? device_unregister+0x8/0x10 > [ 1379.803012] [<c1233a81>] ? __scsi_remove_device+0x34/0x7e > [ 1379.803012] [<c1232f07>] ? scsi_forget_host+0x45/0x72 > [ 1379.803012] [<c122cf46>] ? scsi_remove_host+0x84/0x102 > [ 1379.803012] [<c128c28f>] ? quiesce_and_remove_host+0x47/0x7f > [ 1379.803012] [<c128c357>] ? usb_stor_disconnect+0x10/0x18 > [ 1379.803012] [<c1279aa3>] ? usb_unbind_interface+0x32/0xc1 > [ 1379.803012] [<c1222d45>] ? __device_release_driver+0x53/0x96 > [ 1379.803012] [<c1222d9d>] ? device_release_driver+0x15/0x1e > [ 1379.803012] [<c1222a44>] ? bus_remove_device+0x5f/0x6a > [ 1379.803012] [<c1220de0>] ? device_del+0xec/0x12f > [ 1379.803012] [<c1278d90>] ? usb_disable_device+0x36/0xbc > [ 1379.803012] [<c12744f4>] ? usb_disconnect+0x69/0xcb > [ 1379.803012] [<c127501e>] ? hub_thread+0x324/0xa82 > [ 1379.803012] [<c1032de6>] ? autoremove_wake_function+0x0/0x29 > [ 1379.803012] [<c1274cfa>] ? hub_thread+0x0/0xa82 > [ 1379.803012] [<c1032b7e>] ? kthread+0x62/0x67 > [ 1379.803012] [<c1032b1c>] ? kthread+0x0/0x67 > [ 1379.803012] [<c1002bf6>] ? kernel_thread_helper+0x6/0x10 > [ 1379.803012] Code: 8d 4a 01 83 fa 09 89 0d 94 56 60 c1 7f 18 50 8b > 43 0c 8b 40 2c 83 c0 58 50 68 38 a9 49 c1 e8 bd 6a 22 00 83 c4 0c 5b > c3 53 89 c3 <83> 78 0c 00 74 4a 0f ba a8 c0 01 00 00 08 eb 33 89 d8 e8 > d4 15 > [ 1379.803012] EIP: [<c1161f7f>] elv_quiesce_start+0x3/0x55 SS:ESP 0068:f64e5e1c > [ 1379.803012] CR2: 000000000000000c > [ 1379.803012] ---[ end trace 230ef585b1215f7d ]--- > [ 1379.803012] note: khubd[14] exited with preempt_count 1 > > My system seems to work fine, though. > Regards, > Fabio > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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