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Date:   Thu, 7 Dec 2017 17:43:48 +0200 (EET)
From:   Meelis Roos <mroos@...ux.ee>
To:     Corey Minyard <minyard@....org>
cc:     Linux Kernel list <linux-kernel@...r.kernel.org>,
        Colin Ian King <colin.king@...onical.com>
Subject: Re: ipmi null pointer oops in 4.15-rc2+ on HP DL360G6

> > Tried current 4.15 git on HP DL360G6 (working fine in 4.14), got null
> > pointer dereference oops from ipmi_pci_probe (or so it seems from the
> > backtrace).
> 
> I have a fix for this at https://bugzilla.kernel.org/show_bug.cgi?id=197999,
> but
> the reported hasn't reported if the patch there fixes the issue.  If you could
> test
> this, that would be very helpful.

It works. no errors. I hve not tested if ipmi communication actually 
works though.

$ dmesg |grep -i pmi
[    0.000000] ACPI: SPMI 0x00000000D761F2C0 000040 (v05 HP     ProLiant 00000001 \xd2?   0000162E)
[    4.563949] ipmi message handler version 39.2
[    4.578919] ipmi device interface
[    4.580438] IPMI System Interface driver.
[    4.580503] ipmi_si dmi-ipmi-si.0: ipmi_platform: probing via SMBIOS
[    4.580561] ipmi_si: SMBIOS: io 0xca2 regsize 1 spacing 1 irq 0
[    4.580618] ipmi_si: Adding SMBIOS-specified kcs state machine
[    4.580687] ipmi_si IPI0001:00: ipmi_platform: probing via ACPI
[    4.580758] ipmi_si IPI0001:00: [io  0x0ca2-0x0ca3] regsize 1 spacing 1 irq 0
[    4.580817] ipmi_si dmi-ipmi-si.0: Removing SMBIOS-specified kcs state machine in favor of ACPI
[    4.580894] ipmi_si: Adding ACPI-specified kcs state machine
[    4.580964] ipmi_platform: probing via SPMI
[    4.581018] ipmi_si: SPMI: io 0xca2 regsize 2 spacing 2 irq 0
[    4.581074] (NULL device *): SPMI-specified kcs state machine: duplicate
[    4.581142] ipmi_si 0000:01:04.6: probing via PCI
[    4.581282] ipmi_si 0000:01:04.6: [mem 0xf5ef0000-0xf5ef00ff] regsize 1 spacing 1 irq 21
[    4.581356] ipmi_si: Adding PCI-specified kcs state machine
[    4.581428] ipmi_si: Trying PCI-specified kcs state machine at mem address 0xf5ef0000, slave address 0x0, irq 21
[    5.112453] ipmi_si 0000:01:04.6: Using irq 21
[    5.127593] ipmi_si 0000:01:04.6: Found new BMC (man_id: 0x00000b, prod_id: 0x2000, dev_id: 0x11)
[    5.139340] ipmi_si 0000:01:04.6: IPMI kcs interface initialized
[    5.148318] IPMI SSIF Interface driver
[    6.126894] ACPI Error: SMBus/IPMI/GenericSerialBus write requires Buffer of length 66, found length 32 (20170831/exfield-427)
[    6.127233] ACPI Error: Method parse/execution failed \_SB.PMI0._PMM, AE_AML_BUFFER_LIMIT (20170831/psparse-550)


-- 
Meelis Roos (mroos@...ux.ee)

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