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Date: Sun, 22 Jun 2008 16:47:23 +0200 From: "Vegard Nossum" <vegard.nossum@...il.com> To: "Rusty Russell" <rusty@...tcorp.com.au>, "Srivatsa Vaddagiri" <vatsa@...ibm.com> Cc: linux-kernel@...r.kernel.org, "Gautham R Shenoy" <ego@...ibm.com>, "Rafael J. Wysocki" <rjw@...k.pl>, "Zhang, Yanmin" <yanmin.zhang@...el.com>, "Heiko Carstens" <heiko.carstens@...ibm.com> Subject: Re: v2.6.26-rc7: BUG: unable to handle kernel NULL pointer dereference On Sun, Jun 22, 2008 at 2:56 PM, Vegard Nossum <vegard.nossum@...il.com> wrote: > Initializing CPU#1 > APIC error on CPU0: 00(40) > Stuck ?? > Inquiring remote APIC #1... > ... APIC #1 ID: failed > ... APIC #1 VERSION: failed > ... APIC #1 SPIV: failed Arch-specific __cpu_up() failed... > BUG: unable to handle kernel NULL pointer dereference at 00000024 > IP: [<c01e0f06>] sysfs_remove_group+0x16/0xc0 > *pde = 00000000 > Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC > > Pid: 3994, comm: bash Not tainted (2.6.26-rc7-00002-g8b2e474-dirty #29) > EIP: 0060:[<c01e0f06>] EFLAGS: 00010282 CPU: 0 > EIP is at sysfs_remove_group+0x16/0xc0 > EAX: 00000008 EBX: 00000001 ECX: 00000004 EDX: c0694c14 > ESI: 00000004 EDI: c07015fc EBP: f3cbfe9c ESP: f3cbfe80 > DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 > Process bash (pid: 3994, ti=f3cbe000 task=f3cb4f60 task.ti=f3cbe000) > Stack: c0302262 f4bcda40 f3cbfe98 00000008 00000001 00000004 00000000 f3cbfea8 > c05880b2 c07576c4 f3cbfec8 c014f567 00000001 00000004 c0753c90 0000001f > 00000001 fffffffb f3cbfedc c014f5d9 0000001f 00000000 00000004 f3cbff00 > Call Trace: > [<c0302262>] ? device_unregister+0x12/0x20 This is line 131 of fs/sysfs/group.c: struct sysfs_dirent *dir_sd = kobj->sd; > [<c05880b2>] ? topology_cpu_callback+0x32/0x70 > [<c014f567>] ? notifier_call_chain+0x37/0x70 > [<c014f5d9>] ? __raw_notifier_call_chain+0x19/0x20 > [<c0586f6e>] ? _cpu_up+0xee/0x100 This is line 314 of _cpu_up(): out_notify: if (ret != 0) __raw_notifier_call_chain(&cpu_chain, CPU_UP_CANCELED | mod, hcpu, nr_calls, NULL); > [<c0586fc9>] ? cpu_up+0x49/0x70 > [<c05678d8>] ? store_online+0x58/0x80 > [<c0567880>] ? store_online+0x0/0x80 > [<c0302a6b>] ? sysdev_store+0x2b/0x40 > [<c01df0f2>] ? sysfs_write_file+0xa2/0x100 > [<c01a0d06>] ? vfs_write+0x96/0x130 > [<c01df050>] ? sysfs_write_file+0x0/0x100 > [<c01a13cd>] ? sys_write+0x3d/0x70 > [<c010831b>] ? sysenter_past_esp+0x78/0xd1 > ======================= > Code: 8b 43 04 83 c3 04 85 c0 75 ed 5b 5e 5d c3 8d b4 26 00 00 00 00 55 89 e5 83 ec 1c 89 7d fc 89 d7 89 5d f4 89 75 f8 89 45 f0 8b 12 <8b> 70 1c 85 d2 74 53 89 f0 e8 bc f5 ff ff 85 c0 89 c3 74 59 8b > EIP: [<c01e0f06>] sysfs_remove_group+0x16/0xc0 SS:ESP 0068:f3cbfe80 > > ...adding a few related Ccs. Vegard -- "The animistic metaphor of the bug that maliciously sneaked in while the programmer was not looking is intellectually dishonest as it disguises that the error is the programmer's own creation." -- E. W. Dijkstra, EWD1036 -- 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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