linux-kernel - Re: [EXT] [Bisected] [efeda3bf912f] OOPS crash while performing Block device module parameter test [qla2xxx / FC]

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Message-ID: <80a4706a-d33c-4a46-b93d-75b08aa5577e@linux.vnet.ibm.com>
Date:   Wed, 18 Oct 2023 22:34:21 +0530
From:   Tasmiya Nalatwad <tasmiya@...ux.vnet.ibm.com>
To:     Nilesh Javali <njavali@...vell.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-next@...r.kernel.org" <linux-next@...r.kernel.org>
Cc:     Quinn Tran <qutran@...vell.com>,
        "himanshu.madhani@...cle.com" <himanshu.madhani@...cle.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        GR-QLogic-Storage-Upstream <GR-QLogic-Storage-Upstream@...vell.com>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "abdhalee@...ux.vnet.ibm.com" <abdhalee@...ux.vnet.ibm.com>,
        "mputtash@...ux.vnet.com" <mputtash@...ux.vnet.com>,
        "sachinp@...ux.vnet.com" <sachinp@...ux.vnet.com>
Subject: Re: [EXT] [Bisected] [efeda3bf912f] OOPS crash while performing Block
 device module parameter test [qla2xxx / FC]

Thanks Nilesh. The patch fixes the issue.

On 10/18/23 19:59, Nilesh Javali wrote:
> Hi Tasmiya,
>
>> -----Original Message-----
>> From: Tasmiya Nalatwad <tasmiya@...ux.vnet.ibm.com>
>> Sent: Wednesday, October 18, 2023 6:51 PM
>> To: linux-scsi@...r.kernel.org; linux-kernel@...r.kernel.org; linuxppc-
>> dev@...ts.ozlabs.org; linux-block@...r.kernel.org; linux-next@...r.kernel.org
>> Cc: Quinn Tran <qutran@...vell.com>; Nilesh Javali <njavali@...vell.com>;
>> himanshu.madhani@...cle.com; martin.petersen@...cle.com; GR-QLogic-
>> Storage-Upstream <GR-QLogic-Storage-Upstream@...vell.com>;
>> jejb@...ux.ibm.com; abdhalee@...ux.vnet.ibm.com; mputtash@...ux.vnet.com;
>> sachinp@...ux.vnet.com
>> Subject: [EXT] [Bisected] [efeda3bf912f] OOPS crash while performing Block
>> device module parameter test [qla2xxx / FC]
>>
>> External Email
>>
>> ----------------------------------------------------------------------
>> Greetings,
>>
>> OOPs Kernel crash while performing Block device module parameter test
>> [qla2xxx / FC] on linux-next 6.6.0-rc5-next-20231010
>>
>> --- Traces ---
>>
>> [30876.431678] Kernel attempted to read user page (30) - exploit
>> attempt? (uid: 0)
>> [30876.431687] BUG: Kernel NULL pointer dereference on read at 0x00000030
>> [30876.431692] Faulting instruction address: 0xc0080000018e3180
>> [30876.431697] Oops: Kernel access of bad area, sig: 11 [#1]
>> [30876.431700] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=8192 NUMA
>> pSeries
>> [30876.431705] Modules linked in: qla2xxx(+) nvme_fc nvme_fabrics
>> nvme_core dm_round_robin dm_queue_length exfat vfat fat btrfs
>> blake2b_generic zstd_compress loop raid10 raid456 async_raid6_recov
>> async_memcpy async_pq async_xor async_tx xor raid6_pq raid1 linear xfs
>> libcrc32c raid0 nvram rpadlpar_io rpaphp xsk_diag bonding tls rfkill
>> vmx_crypto pseries_rng binfmt_misc ext4 mbcache jbd2 dm_service_time
>> sd_mod sg ibmvfc ibmveth t10_pi crc64_rocksoft crc64 scsi_transport_fc
>> dm_multipath dm_mirror dm_region_hash dm_log dm_mod fuse [last unloaded:
>> nvme_core]
>> [30876.431767] CPU: 0 PID: 1289400 Comm: kworker/0:2 Kdump: loaded Not
>> tainted 6.6.0-rc5-next-20231010-auto #1
>> [30876.431773] Hardware name: IBM,9080-HEX POWER10 (raw) 0x800200
>> 0xf000006 of:IBM,FW1030.30 (NH1030_062) hv:phyp pSeries
>> [30876.431779] Workqueue: events work_for_cpu_fn
>> [30876.431788] NIP:  c0080000018e3180 LR: c0080000018e3128 CTR:
>> c000000000513f80
>> [30876.431792] REGS: c000000062a8b930 TRAP: 0300   Not tainted
>> (6.6.0-rc5-next-20231010-auto)
>> [30876.431797] MSR:  800000000280b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>
>> CR: 28000482  XER: 2004000f
>> [30876.431811] CFAR: c0080000018e3138 DAR: 0000000000000030 DSISR:
>> 40000000 IRQMASK: 0
>> [30876.431811] GPR00: c0080000018e3128 c000000062a8bbd0
>> c008000000eb8300
>> 0000000000000000
>> [30876.431811] GPR04: 0000000000000000 0000000000000000
>> 0000000000000000
>> 000000000017bbac
>> [30876.431811] GPR08: 0000000000000000 0000000000000030
>> 0000000000000000
>> c0080000019a6d68
>> [30876.431811] GPR12: 0000000000000000 c000000002ff0000
>> c00000000019cb98
>> c000000082a97980
>> [30876.431811] GPR16: 0000000000000000 0000000000000000
>> 0000000000000000
>> c000000003071ab0
>> [30876.431811] GPR20: c000000003491c0d c000000063bb9a00
>> c000000063bb30c0
>> c0000001d8b52928
>> [30876.431811] GPR24: c008000000eb63a8 ffffffffffffffed c0000001d8b52000
>> 0000000000000102
>> [30876.431811] GPR28: c008000000ebaf00 c0000001d8b52890
>> 0000000000000000
>> c0000001d8b58000
>> [30876.431856] NIP [c0080000018e3180] qla2x00_mem_free+0x298/0x6b0
>> [qla2xxx]
>> [30876.431876] LR [c0080000018e3128] qla2x00_mem_free+0x240/0x6b0
>> [qla2xxx]
>> [30876.431895] Call Trace:
>> [30876.431897] [c000000062a8bbd0] [c0080000018e2f1c]
>> qla2x00_mem_free+0x34/0x6b0 [qla2xxx] (unreliable)
>> [30876.431917] [c000000062a8bc20] [c0080000018eed30]
>> qla2x00_probe_one+0x16d8/0x2640 [qla2xxx]
>> [30876.431937] [c000000062a8bd90] [c0000000008c589c]
>> local_pci_probe+0x6c/0x110
>> [30876.431943] [c000000062a8be10] [c000000000189ba8]
>> work_for_cpu_fn+0x38/0x60
>> [30876.431948] [c000000062a8be40] [c00000000018d0d0]
>> process_scheduled_works+0x230/0x4f0
>> [30876.431952] [c000000062a8bf10] [c00000000018fe14]
>> worker_thread+0x1e4/0x500
>> [30876.431955] [c000000062a8bf90] [c00000000019ccc8]
>> kthread+0x138/0x140
>> [30876.431960] [c000000062a8bfe0] [c00000000000df98]
>> start_kernel_thread+0x14/0x18
>> [30876.431965] Code: 4082000c a09f0198 78841b68 e8df0278 38e00000
>> 480c3b8d e8410018 39200000 e91f0178 f93f0280 f93f0278 39280030
>> <e9480030> 7fa95040 419e00b8 ebc80030
>> [30876.431977] ---[ end trace 0000000000000000 ]---
>> [30876.480385] pstore: backend (nvram) writing error (-1)
>>
>>
>> Git bisect points to below commit. Reverting this commit fixes the problem.
>> commit efeda3bf912f269bcae16816683f432f58d68075
>>       scsi: qla2xxx: Move resource to allow code reuse
>>
>> --
>> Regards,
>> Tasmiya Nalatwad
>> IBM Linux Technology Center
> We have recently posted a fix for the commit that you have pointed here,
> https://marc.info/?l=linux-scsi&m=169750508721982&w=2
>
> Thanks,
> Nilesh

-- 
Regards,
Tasmiya Nalatwad
IBM Linux Technology Center