Hello The below NULL pointer issue was triggered on the latest linux-block/for-next with blktests, is it one known issue? [ 536.985788] run blktests block/025 at 2021-10-13 04:26:03 [ 537.196048] scsi_debug:sdebug_driver_probe: scsi_debug: trim poll_queues to 0. poll_q/nr_hw = (0/1) [ 537.206830] sd 11:0:0:0: Power-on or device reset occurred [ 550.149333] BUG: kernel NULL pointer dereference, address: 0000000000000098 [ 550.157111] #PF: supervisor read access in kernel mode [ 550.162843] #PF: error_code(0x0000) - not-present page [ 550.168576] PGD 0 P4D 0 [ 550.171403] Oops: 0000 [#1] SMP PTI [ 550.175294] CPU: 7 PID: 0 Comm: swapper/7 Tainted: G S 5.15.0-rc5+ #1 [ 550.183938] Hardware name: Dell Inc. PowerEdge R730xd/ɲ�Pow, BIOS 2.13.0 05/14/2021 [ 550.192578] RIP: 0010:wb_timer_fn+0x37/0x320 [ 550.197351] Code: 48 8b 5f 60 4c 8b 67 50 8b ab 98 00 00 00 8b 93 b8 00 00 00 8b 83 d8 00 00 00 4c 8b 6b 28 01 d5 01 c5 48 8b 43 60 48 8b 40 78 <4c> 8b b0 98 00 00 00 4d 85 ed 0f 84 c0 00 00 00 48 83 7b 30 00 0f [ 550.218308] RSP: 0018:ffffb52981c34e80 EFLAGS: 00010246 [ 550.224139] RAX: 0000000000000000 RBX: ffff9650c7a59700 RCX: 000000000000000c [ 550.232103] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff965111a72500 [ 550.240064] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 550.248027] R10: 000000000000000b R11: 0000000000000030 R12: ffff964f44c3c1e0 [ 550.255991] R13: 0000000000000000 R14: ffff965111a72510 R15: ffff9652b7cd7f70 [ 550.263954] FS: 0000000000000000(0000) GS:ffff9652b7cc0000(0000) knlGS:0000000000000000 [ 550.272985] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 550.279396] CR2: 0000000000000098 CR3: 000000040a610003 CR4: 00000000001706e0 [ 550.287360] Call Trace: [ 550.290087] <IRQ> [ 550.292675] ? blk_stat_free_callback_rcu+0x30/0x30 [ 550.298120] call_timer_fn+0x26/0xf0 [ 550.302114] run_timer_softirq+0x1c7/0x3d0 [ 550.306678] ? update_process_times+0xb0/0xc0 [ 550.311541] ? tick_sched_handle.isra.24+0x1f/0x60 [ 550.316890] ? timerqueue_add+0x6f/0x80 [ 550.321170] ? enqueue_hrtimer+0x2f/0x70 [ 550.325548] ? recalibrate_cpu_khz+0x10/0x10 [ 550.330316] ? ktime_get+0x3e/0xa0 [ 550.334108] ? setup_local_APIC+0x350/0x350 [ 550.338779] __do_softirq+0xc9/0x285 [ 550.342762] irq_exit_rcu+0xa6/0xc0 [ 550.346657] sysvec_apic_timer_interrupt+0x6e/0x90 [ 550.352006] </IRQ> [ 550.354345] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 550.360081] RIP: 0010:cpuidle_enter_state+0xd6/0x350 [ 550.365626] Code: 49 89 c4 0f 1f 44 00 00 31 ff e8 95 5b 98 ff 45 84 ff 74 12 9c 58 f6 c4 02 0f 85 32 02 00 00 31 ff e8 6e fb 9e ff fb 45 85 f6 <0f> 88 e0 00 00 00 49 63 d6 4c 2b 24 24 48 8d 04 52 48 8d 04 82 49 [ 550.386582] RSP: 0018:ffffb52980187e80 EFLAGS: 00000202 [ 550.392411] RAX: ffff9652b7ce7c00 RBX: 0000000000000004 RCX: 000000000000001f [ 550.400374] RDX: 0000008017745c51 RSI: 000000005000068d RDI: 0000000000000000 [ 550.408337] RBP: ffffd5297fcc0308 R08: 0000000000000002 R09: 0000000000027440 [ 550.416300] R10: 00000beeb045c510 R11: ffff9652b7ce6944 R12: 0000008017745c51 [ 550.424264] R13: ffffffffb3acac00 R14: 0000000000000004 R15: 0000000000000000 [ 550.432228] cpuidle_enter+0x29/0x40 [ 550.436210] do_idle+0x257/0x2a0 [ 550.439814] cpu_startup_entry+0x19/0x20 [ 550.444192] start_secondary+0x116/0x150 [ 550.448570] secondary_startup_64_no_verify+0xc2/0xcb [ 550.454212] Modules linked in: scsi_debug(-) rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs rfkill sunrpc vfat fat dm_multipath intel_rapl_msr intel_rapl_common sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp mgag200 kvm_intel kvm iTCO_wdt i2c_algo_bit irqbypass iTCO_vendor_support drm_kms_helper crct10dif_pclmul crc32_pclmul pcspkr ghash_clmulni_intel syscopyarea sysfillrect sysimgblt fb_sys_fops cdc_ether rapl intel_cstate usbnet mei_me drm intel_uncore mii lpc_ich mxm_wmi mei ipmi_ssif ipmi_si ipmi_devintf ipmi_msghandler acpi_power_meter acpi_pad xfs libcrc32c sd_mod sg nvme ahci nvme_core libahci crc32c_intel libata t10_pi tg3 megaraid_sas wmi dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_debug] [ 550.528470] CR2: 0000000000000098 [ 550.532168] ---[ end trace e450dd0876b8ec06 ]--- [ 550.605860] RIP: 0010:wb_timer_fn+0x37/0x320 [ 550.610630] Code: 48 8b 5f 60 4c 8b 67 50 8b ab 98 00 00 00 8b 93 b8 00 00 00 8b 83 d8 00 00 00 4c 8b 6b 28 01 d5 01 c5 48 8b 43 60 48 8b 40 78 <4c> 8b b0 98 00 00 00 4d 85 ed 0f 84 c0 00 00 00 48 83 7b 30 00 0f [ 550.631586] RSP: 0018:ffffb52981c34e80 EFLAGS: 00010246 [ 550.637416] RAX: 0000000000000000 RBX: ffff9650c7a59700 RCX: 000000000000000c [ 550.645379] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff965111a72500 [ 550.653341] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 550.661303] R10: 000000000000000b R11: 0000000000000030 R12: ffff964f44c3c1e0 [ 550.669265] R13: 0000000000000000 R14: ffff965111a72510 R15: ffff9652b7cd7f70 [ 550.677227] FS: 0000000000000000(0000) GS:ffff9652b7cc0000(0000) knlGS:0000000000000000 [ 550.686257] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 550.692669] CR2: 0000000000000098 CR3: 000000040a610003 CR4: 00000000001706e0 [ 550.700633] Kernel panic - not syncing: Fatal exception in interrupt [ 550.829274] Kernel Offset: 0x31000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 550.911183] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]--- -- Best Regards, Yi Zhang
