[EXT] [Bisected] [efeda3bf912f] OOPS crash while performing Block device module parameter test [qla2xxx / FC]

[Nilesh Javali]

Hi Tasmiya,

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