linux-kernel - Re: [bugzilla-daemon@...zilla.kernel.org: [Bug 197999] New: [ipmi pci] BUG: unable to handle kernel NULL pointer dereference at (null)]

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Date:   Thu, 30 Nov 2017 11:17:55 -0600
From:   Corey Minyard <minyard@....org>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     openipmi-developer@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [bugzilla-daemon@...zilla.kernel.org: [Bug 197999] New: [ipmi
 pci] BUG: unable to handle kernel NULL pointer dereference at (null)]

On 11/27/2017 08:51 AM, Bjorn Helgaas wrote:
> FYI.  This was reported against drivers/pci, but it doesn't look like
> a PCI core issue to me.

Not a PCI issue, it was a change I did.  To whom shall I send the patch 
for testing?

This change was in linux-next for many months, and I don't have hardware 
with
IPMI on PCI.

-corey

> ----- Forwarded message from bugzilla-daemon@...zilla.kernel.org -----
>
> Date: Mon, 27 Nov 2017 01:45:48 +0000
> From: bugzilla-daemon@...zilla.kernel.org
> To: bugzilla.pci@...il.com
> Subject: [Bug 197999] New: [ipmi pci] BUG: unable to handle kernel NULL pointer
> 	dereference at (null)
>
> https://bugzilla.kernel.org/show_bug.cgi?id=197999
>
>              Bug ID: 197999
>             Summary: [ipmi pci] BUG: unable to handle kernel NULL pointer
>                      dereference at (null)
>             Product: Drivers
>             Version: 2.5
>      Kernel Version: 4.14.0
>            Hardware: All
>                  OS: Linux
>                Tree: Mainline
>              Status: NEW
>            Severity: normal
>            Priority: P1
>           Component: PCI
>            Assignee: drivers_pci@...nel-bugs.osdl.org
>            Reporter: yin-jianhong@....com
>          Regression: No
>
> '''
> [   17.748379] ipmi device interface
> [   17.800243] hpwdt 0000:01:04.0: HPE Watchdog Timer Driver: NMI decoding
> initialized, allow kernel dump: ON (default = 1/ON)
> [   17.802325] hpwdt 0000:01:04.0: HPE Watchdog Timer Driver: 1.4.0, timer
> margin: 30 seconds (nowayout=0).
> [   17.962598] intel_rng: FWH not detected
> [   18.235369] sd 2:0:0:0: Attached scsi generic sg0 type 0
> [   18.421459] ACPI Warning: SystemIO range
> 0x0000000000000928-0x000000000000092F conflicts with OpRegion
> 0x0000000000000928-0x000000000000092F (\SGPE) (20170831/utaddress-247)
> [   18.424132] ACPI: If an ACPI driver is available for this device, you should
> use it instead of the native driver
> [   18.425910] lpc_ich: Resource conflict(s) found affecting gpio_ich
> [   18.511453] Loading iSCSI transport class v2.0-870.
> [   18.746569] IPMI System Interface driver.
> [   18.747299] ipmi_si dmi-ipmi-si.0: ipmi_platform: probing via SMBIOS
> [   18.748825] ipmi_si: SMBIOS: io 0xca2 regsize 1 spacing 1 irq 0
> [   18.755030] leds_ss4200: no LED devices found
> [   18.756008] ipmi_si: Adding SMBIOS-specified kcs state machine
> [   18.758204] ipmi_si IPI0001:00: ipmi_platform: probing via ACPI
> [   18.759473] ipmi_si IPI0001:00: [io  0x0ca2-0x0ca3] regsize 1 spacing 1 irq
> 0
> [   18.760988] ipmi_si dmi-ipmi-si.0: Removing SMBIOS-specified kcs state
> machine in favor of ACPI
> [   18.762651] ipmi_si: Adding ACPI-specified kcs state machine
> [   18.763917] ipmi_platform: probing via SPMI
> [   18.764930] ipmi_si: SPMI: io 0xca2 regsize 2 spacing 2 irq 0
> [   18.766145] (NULL device *): SPMI-specified kcs state machine: duplicate
> [   18.767602] ipmi_si 0000:01:04.6: probing via PCI
> [   18.768708] BUG: unable to handle kernel NULL pointer dereference at
>    (null)
> [   18.770121] IP:           (null)
> [   18.770670] PGD 0 P4D 0
> [   18.771227] Oops: 0010 [#1] SMP
> [   18.771875] Modules linked in: leds_ss4200(-) ipmi_si(+) auth_rpcgss
> scsi_transport_iscsi lpc_ich sg hpwdt ipmi_devintf hpilo floppy(+)
> ipmi_msghandler shpchp nfs_acl lockd i3000_edac grace sunrpc ip_tables xfs
> libcrc32c radeon sd_mod ata_generic pata_acpi i2c_algo_bit drm_kms_helper
> syscopyarea sysfillrect sysimgblt fb_sys_fops ttm ata_piix libata tg3 drm
> serio_raw ptp i2c_core be2net pps_core dm_mirror dm_region_hash dm_log dm_mod
> [   18.778511] CPU: 0 PID: 567 Comm: systemd-udevd Not tainted 4.14.0 #1
> [   18.779865] Hardware name: HP ProLiant DL320 G5 , BIOS W04 06/10/2008
> [   18.781251] task: ffff880116ce1600 task.stack: ffffc900008bc000
> [   18.782506] RIP: 0010:          (null)
> [   18.783285] RSP: 0018:ffffc900008bfac0 EFLAGS: 00010246
> [   18.784414] RAX: 00000000fdbf0000 RBX: ffff880122ab2000 RCX:
> 0000000000000000
> [   18.785945] RDX: 0000000000000002 RSI: 0000000000000216 RDI:
> ffffc900008bfac8
> [   18.787447] RBP: ffffc900008bfac8 R08: 0000000000000002 R09:
> ffffc900008bfa5c
> [   18.788997] R10: 0000000000000026 R11: ffffea0004842ac0 R12:
> ffff880122ab20a0
> [   18.790531] R13: 0000000000000001 R14: 0000000000000003 R15:
> 0000000000000001
> [   18.792066] FS:  00007fed315068c0(0000) GS:ffff880127a00000(0000)
> knlGS:0000000000000000
> [   18.793784] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [   18.795022] CR2: 0000000000000000 CR3: 00000001221c3000 CR4:
> 00000000000006f0
> [   18.796538] Call Trace:
> [   18.797062]  ? ipmi_pci_probe+0x1fa/0x270 [ipmi_si]
> [   18.798109]  ? ipmi_pci_probe+0x270/0x270 [ipmi_si]
> [   18.799152]  ? local_pci_probe+0x3f/0xa0
> [   18.799944]  ? pci_assign_irq+0x27/0x120
> [   18.800776]  ? pci_device_probe+0x146/0x1b0
> [   18.801682]  ? driver_probe_device+0x2b3/0x4a0
> [   18.802622]  ? __driver_attach+0xd6/0xe0
> [   18.803450]  ? driver_probe_device+0x4a0/0x4a0
> [   18.804391]  ? bus_for_each_dev+0x68/0xb0
> [   18.805203]  ? bus_add_driver+0x41/0x260
> [   18.806032]  ? driver_register+0x5b/0xd0
> [   18.806813]  ? cleanup_ipmi_si+0x80/0x80 [ipmi_si]
> [   18.807826]  ? ipmi_si_pci_init+0x2a/0x50 [ipmi_si]
> [   18.808887]  ? init_ipmi_si+0x17f/0x1a0 [ipmi_si]
> [   18.809916]  ? cleanup_ipmi_si+0x80/0x80 [ipmi_si]
> [   18.810946]  ? do_one_initcall+0x4d/0x1a0
> [   18.811795]  ? free_unref_page_commit+0x85/0xf0
> [   18.812769]  ? _cond_resched+0x15/0x30
> [   18.813578]  ? kmem_cache_alloc_trace+0x9c/0x1a0
> [   18.814571]  ? do_init_module+0x22/0x220
> [   18.815400]  ? do_init_module+0x5a/0x220
> [   18.816247]  ? load_module+0x21b2/0x2970
> [   18.817074]  ? m_show+0x1c0/0x1c0
> [   18.817775]  ? SYSC_finit_module+0x94/0xe0
> [   18.818661]  ? entry_SYSCALL_64_fastpath+0x1a/0x7d
> [   18.819690] Code:  Bad RIP value.
> [   18.820399] RIP:           (null) RSP: ffffc900008bfac0
> [   18.821511] CR2: 0000000000000000
> [   18.822300] ---[ end trace 5427b1c5778ecedd ]---
> [   18.823320] Kernel panic - not syncing: Fatal exception
> [   18.824483] Kernel Offset: disabled
> [   18.825258] ---[ end Kernel panic - not syncing: Fatal exception
> '''
>