Hello Pls help check below BUG which was observed with command "sg_reset -v -b /dev/sdb" on upstream kernel-5.17.0-rc4. thanks [1] kernel repo:https://github.com/torvalds/linux.git [2] [81753.794722] BUG: kernel NULL pointer dereference, address: 0000000000000078 [81753.804034] #PF: supervisor read access in kernel mode [81753.809765] #PF: error_code(0x0000) - not-present page [81753.815496] PGD 0 P4D 0 [81753.818319] Oops: 0000 [#1] PREEMPT SMP PTI [81753.824329] CPU: 0 PID: 34840 Comm: sg_reset Kdump: loaded Not tainted 5.17.0-rc4 #1 [81753.832970] Hardware name: Dell Inc. PowerEdge R730/0599V5, BIOS 2.4.3 01/17/2017 [81753.841319] RIP: 0010:scmd_printk+0x98/0x100 [81753.846084] Code: 65 48 2b 04 25 28 00 00 00 75 0d 48 83 c4 50 5b 41 5c 41 5d 41 5e 5d c3 e8 e5 ad 39 00 48 8b 83 f8 fe ff ff 8b 8b 18 ff ff ff <48> 8b 50 78 48 85 d2 74 04 48 83 c2 0c be 80 00 00 00 4c 89 e7 e8 [81753.867041] RSP: 0018:ffffc0d4025cfdc0 EFLAGS: 00010286 [81753.872869] RAX: 0000000000000000 RBX: ffff9bb911569d08 RCX: 00000000ffffffff [81753.880831] RDX: 0000000480998000 RSI: ffffffff9110b161 RDI: 00000000000350e0 [81753.888792] RBP: ffffc0d4025cfe30 R08: 0000000000000080 R09: ffff9bb911569d40 [81753.896754] R10: 0000000000000022 R11: 0000000000000000 R12: ffff9bb904701000 [81753.904715] R13: ffffffffc03654be R14: ffffffffc03636f0 R15: ffff9bb911569d08 [81753.912676] FS: 00007ff22a98e600(0000) GS:ffff9bbc6fc00000(0000) knlGS:0000000000000000 [81753.921704] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [81753.928113] CR2: 0000000000000078 CR3: 0000000103ac0002 CR4: 00000000001706f0 [81753.936075] Call Trace: [81753.938802] <TASK> [81753.941141] ? cred_has_capability.isra.0+0x78/0x120 [81753.946687] megasas_reset_bus_host+0x2d/0xf0 [megaraid_sas] [81753.953008] ? scsi_init_command+0x102/0x1a0 [81753.957771] scsi_try_host_reset+0x3a/0xd0 [81753.962344] scsi_ioctl_reset+0x220/0x290 [81753.966817] blkdev_ioctl+0x13e/0x280 [81753.970903] __x64_sys_ioctl+0x82/0xb0 [81753.975084] do_syscall_64+0x3b/0x90 [81753.979073] entry_SYSCALL_64_after_hwframe+0x44/0xae [81753.984708] RIP: 0033:0x7ff22a7c6c0b [81753.988698] Code: 73 01 c3 48 8b 0d 1d 62 1b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ed 61 1b 00 f7 d8 64 89 01 48 [81754.009652] RSP: 002b:00007ffc40e3e7d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [81754.018099] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007ff22a7c6c0b [81754.026060] RDX: 00007ffc40e3e804 RSI: 0000000000002284 RDI: 0000000000000003 [81754.034022] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000077 [81754.041983] R10: 0000000000000063 R11: 0000000000000246 R12: 00007ffc40e3e804 [81754.049944] R13: 00007ffc40e4081f R14: 000055711a8e290d R15: 000055711a8e4020 [81754.057906] </TASK> [81754.060339] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs sunrpc dm_multipath intel_rapl_msr intel_rapl_common sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm mgag200 i2c_algo_bit drm_shmem_helper drm_kms_helper dell_wmi_descriptor syscopyarea rfkill sysfillrect video sysimgblt fb_sys_fops ipmi_ssif cec irqbypass rapl intel_cstate dcdbas intel_uncore iTCO_wdt mei_me ipmi_si mxm_wmi mei iTCO_vendor_support ses pcspkr enclosure scsi_transport_sas lpc_ich ipmi_devintf ipmi_msghandler acpi_power_meter drm fuse xfs libcrc32c sd_mod t10_pi sg ahci libahci crct10dif_pclmul crc32_pclmul crc32c_intel megaraid_sas libata ghash_clmulni_intel tg3 wmi dm_mirror dm_region_hash dm_log dm_mod [81754.134169] CR2: 0000000000000078 -- Best Regards, Changhui Zhong
