diff options
| author | Venki Pallipadi <venkatesh.pallipadi@intel.com> | 2008-09-08 10:18:40 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-16 16:53:09 +0200 |
| commit | f0ed4e695faf6766927c8cfbda2bc7530c7210c2 (patch) | |
| tree | 408d44ed257454030e0cb1628bf1365ec7d4a749 /scripts/namespace.pl | |
| parent | 2a554fb132cf804477087057b9b0ff2162984507 (diff) | |
x86: using HPET in MSI mode and setting up per CPU HPET timers, fix
On Sat, Sep 06, 2008 at 06:03:53AM -0700, Ingo Molnar wrote:
>
> it crashes two testsystems, the fault on a NULL pointer in hpet init,
> with:
>
> initcall print_all_ICs+0x0/0x520 returned 0 after 26 msecs
> calling hpet_late_init+0x0/0x1c0
> BUG: unable to handle kernel NULL pointer dereference at 000000000000008c
> IP: [<ffffffff80d228be>] hpet_late_init+0xfe/0x1c0
> PGD 0
> Oops: 0000 [1] SMP
> CPU 0
> Modules linked in:
> Pid: 1, comm: swapper Not tainted 2.6.27-rc5 #29725
> RIP: 0010:[<ffffffff80d228be>] [<ffffffff80d228be>] hpet_late_init+0xfe/0x1c0
> RSP: 0018:ffff88003fa07dd0 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
> RDX: ffffc20000000160 RSI: 0000000000000000 RDI: 0000000000000003
> RBP: ffff88003fa07e90 R08: 0000000000000000 R09: ffff88003fa07dd0
> R10: 0000000000000001 R11: 0000000000000000 R12: ffff88003fa07dd0
> R13: 0000000000000002 R14: ffffc20000000000 R15: 000000006f57e511
> FS: 0000000000000000(0000) GS:ffffffff80cf6a80(0000) knlGS:0000000000000000
> CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> CR2: 000000000000008c CR3: 0000000000201000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process swapper (pid: 1, threadinfo ffff88003fa06000, task ffff88003fa08000)
> Stack: 00000000fed00000 ffffc20000000000 0000000100000003 0000000800000002
> 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000 0000000000000000 0000000000000000 0000000000000000
> Call Trace:
> [<ffffffff80d227c0>] ? hpet_late_init+0x0/0x1c0
> [<ffffffff80209045>] do_one_initcall+0x45/0x190
> [<ffffffff80296f39>] ? register_irq_proc+0x19/0xe0
> [<ffffffff80d0d140>] ? early_idt_handler+0x0/0x73
> [<ffffffff80d0dabc>] kernel_init+0x14c/0x1b0
> [<ffffffff80942ac1>] ? trace_hardirqs_on_thunk+0x3a/0x3f
> [<ffffffff8020dbd9>] child_rip+0xa/0x11
> [<ffffffff8020ceee>] ? restore_args+0x0/0x30
> [<ffffffff80d0d970>] ? kernel_init+0x0/0x1b0
> [<ffffffff8020dbcf>] ? child_rip+0x0/0x11
> Code: 20 48 83 c1 01 48 39 f1 75 e3 44 89 e8 4c 8b 05 29 29 22 00 31 f6 48 8d 78 01 66 66 90 89 f0 48 8d 04 80 48 c1 e0 05 4a 8d 0c 00 <f6> 81 8c 00 00 00 08 74 26 8b 81 80 00 00 00 8b 91 88 00 00 00
> RIP [<ffffffff80d228be>] hpet_late_init+0xfe/0x1c0
> RSP <ffff88003fa07dd0>
> CR2: 000000000000008c
> Kernel panic - not syncing: Fatal exception
There was one code path, with CONFIG_PCI_MSI disabled, where we were accessing
hpet_devs without initialization. That resulted in the above crash. The change
below adds a check for hpet_devs.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'scripts/namespace.pl')
0 files changed, 0 insertions, 0 deletions