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    SubjectRE: [EXT] [Bisected] [efeda3bf912f] OOPS crash while performing Block device module parameter test [qla2xxx / FC]
    Date
    Hi Tasmiya,

    > -----Original Message-----
    > From: Tasmiya Nalatwad <tasmiya@linux.vnet.ibm.com>
    > Sent: Wednesday, October 18, 2023 6:51 PM
    > To: linux-scsi@vger.kernel.org; linux-kernel@vger.kernel.org; linuxppc-
    > dev@lists.ozlabs.org; linux-block@vger.kernel.org; linux-next@vger.kernel.org
    > Cc: Quinn Tran <qutran@marvell.com>; Nilesh Javali <njavali@marvell.com>;
    > himanshu.madhani@oracle.com; martin.petersen@oracle.com; GR-QLogic-
    > Storage-Upstream <GR-QLogic-Storage-Upstream@marvell.com>;
    > jejb@linux.ibm.com; abdhalee@linux.vnet.ibm.com; mputtash@linux.vnet.com;
    > sachinp@linux.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
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