linux-kernel - BUG: unable to handle kernel paging request

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Date:	Wed, 14 May 2008 11:23:02 +0200
From:	"Zdenek Kabelac" <zdenek.kabelac@...il.com>
To:	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: BUG: unable to handle kernel paging request - scsi_bus_uevent

Hello


With kernel 2.6.26-rc2 - commit 093e2bb3cb5fcc37e3d02a193a3435ba64e9eb7b
(2 days old) I've got oops during boot (my setup T61, C2D, 2GB)

Zdenek

This oops is not deterministic

BUG: unable to handle kernel paging request at ffff81007ca27f78
IP: [<ffffffff81218497>] scsi_bus_uevent+0x7/0x30
PGD 8063 PUD a063 PMD 7ceb8163 PTE 800000007ca27160
Oops: 0000 [1] PREEMPT SMP DEBUG_PAGEALLOC
CPU 0
Modules linked in: uhci_hcd ohci_hcd ehci_hcd usbcore
Pid: 612, comm: udevtrigger Not tainted 2.6.26-rc2 #1
RIP: 0010:[<ffffffff81218497>]  [<ffffffff81218497>] scsi_bus_uevent+0x7/0x30
RSP: 0018:ffff81007c9ffdb8  EFLAGS: 00010286
RAX: ffff81007e152090 RBX: ffff81007ca28028 RCX: 0000000000000003
RDX: ffff81007e1521e9 RSI: ffff81007e152090 RDI: ffff81007ca28028
RBP: ffff81007c9ffdb8 R08: 00000000fffffffe R09: 000000000000000b
R10: ffffffff8140d3d1 R11: ffff81007c9ffcd8 R12: ffff81007e152090
R13: 0000000000000000 R14: ffffffff8147c8e0 R15: 0000000000000000
FS:  00007f57ce88a780(0000) GS:ffffffff81493000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff81007ca27f78 CR3: 000000007cefb000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process udevtrigger (pid: 612, threadinfo ffff81007c9fe000, task
ffff81007c910000)
Stack:  ffff81007c9ffdd8 ffffffff81202bf4 ffff81007e02d738 ffff81007ca281d8
 ffff81007c9ffe68 ffffffff81177cd5 ffffffff813e5dff 0000000000000000
 ffff81007ca88cc0 ffff81007e152090 ffffffff8142831e 0000000000000000
Call Trace:
 [<ffffffff81202bf4>] dev_uevent+0x84/0x120
 [<ffffffff81177cd5>] kobject_uevent_env+0x1d5/0x3f0
 [<ffffffff81177efb>] kobject_uevent+0xb/0x10
 [<ffffffff81202eb8>] store_uevent+0x38/0xa0
 [<ffffffff8120244e>] dev_attr_store+0x1e/0x20
 [<ffffffff8111032a>] sysfs_write_file+0xca/0x140
 [<ffffffff810b98eb>] vfs_write+0xcb/0x170
 [<ffffffff810b9a80>] sys_write+0x50/0x90
 [<ffffffff8100c50b>] system_call_after_swapgs+0x7b/0x80


Code: f5 ff 4d 85 e4 74 0f 49 8b 44 24 28 48 85 c0 74 05 48 89 df ff
d0 31 c0 48 8b 1c 24 4c 8b 64 24 08 c9 c3 90 55 48 89 f0 48 89 e5 <0f>
be 97 50 ff ff ff 48 c7 c6 43 d4 40 81 48 89 c7 31 c0 e8 21
RIP  [<ffffffff81218497>] scsi_bus_uevent+0x7/0x30
 RSP <ffff81007c9ffdb8>
CR2: ffff81007ca27f78
---[ end trace 30e85c42da63b92f ]---
BUG: sleeping function called from invalid context at kernel/rwsem.c:21
in_atomic():0, irqs_disabled():1
INFO: lockdep is turned off.
irq event stamp: 129392
hardirqs last  enabled at (129391): [<ffffffff810b525d>] __kmalloc+0x7d/0x120
hardirqs last disabled at (129392): [<ffffffff812f7de5>]
do_page_fault+0x35/0xaf0
softirqs last  enabled at (129304): [<ffffffff812802dd>] sk_filter+0x9d/0xe0
softirqs last disabled at (129302): [<ffffffff8128028a>] sk_filter+0x4a/0xe0
Pid: 612, comm: udevtrigger Tainted: G      D   2.6.26-rc2 #1

Call Trace:
 [<ffffffff8105ffa0>] ? print_irqtrace_events+0x110/0x120
 [<ffffffff81032bcc>] __might_sleep+0xec/0x130
 [<ffffffff812f33e0>] down_read+0x20/0x70
 [<ffffffff81075af4>] acct_collect+0x44/0x1f0
 [<ffffffff8103fb4c>] do_exit+0x19c/0x8a0
 [<ffffffff811f06cf>] ? do_unblank_screen+0x1f/0x170
 [<ffffffff812f5ee8>] oops_end+0x88/0x90
 [<ffffffff812f8030>] do_page_fault+0x280/0xaf0
 [<ffffffff81063724>] ? __lock_acquire+0x364/0x11d0
 [<ffffffff8117c7b2>] ? vsnprintf+0x472/0x7e0
 [<ffffffff812f575d>] error_exit+0x0/0xa9
 [<ffffffff81218497>] ? scsi_bus_uevent+0x7/0x30
 [<ffffffff81202bf4>] ? dev_uevent+0x84/0x120
 [<ffffffff81177cd5>] ? kobject_uevent_env+0x1d5/0x3f0
 [<ffffffff81177efb>] ? kobject_uevent+0xb/0x10
 [<ffffffff81202eb8>] ? store_uevent+0x38/0xa0
 [<ffffffff8120244e>] ? dev_attr_store+0x1e/0x20
 [<ffffffff8111032a>] ? sysfs_write_file+0xca/0x140
 [<ffffffff810b98eb>] ? vfs_write+0xcb/0x170
 [<ffffffff810b9a80>] ? sys_write+0x50/0x90
 [<ffffffff8100c50b>] ? system_call_after_swapgs+0x7b/0x80

agpgart: Detected an Intel 965GM Chipset.
agpgart: Detected 7676K stolen memory.
agpgart: AGP aperture is 256M @ 0xe0000000
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