Hi Jens, When I tried to run the SRP tests from the blktests repository against the v5.0 kernel several issues were reported. The same tests pass against kernel v4.20. WARNING: CPU: 0 PID: 262 at block/blk-mq.c:683 blk+AF8-mq+AF8-start+AF8-request+-0x234/0x280 Modules linked in: ib+AF8-srp scsi+AF8-transport+AF8-srp target+AF8-core+AF8-pscsi target+AF8-core+AF8-file ib+AF8-srpt target+AF8-core+AF8-iblock target+AF8-core+AF8-mod rdma+AF8-cm iw+AF8-cm ib+AF8-cm scsi+AF8-debug rdma+AF8-rxe ip6+AF8-udp+AF8-tunnel udp+AF8-tunnel null+AF8-blk dm+AF8-service+AF8-time ib+AF8-umad ib+AF8-uverbs ib+AF8-core mq+AF8-deadline kyber+AF8-iosched bfq scsi+AF8-dh+AF8-rdac scsi+AF8-dh+AF8-emc scsi+AF8-dh ath crct10dif+AF8-pclmul crc32+AF8-pclmul ghash+AF8-clmulni+AF8-intel aesni+AF8-intel aes+AF8-x86+AF8-64 crypto+AF8-simd cryptd glue+AF8-helper joydev virtio+AF8-console virtio+AF8-balloon serio+AF8-raw qemu+AF8-fw+AF8-cfg iscsi+AF8-tcp libiscsi+AF8-tcp libiscsi scsi+AF8-transport+AF8-iscsi ip+AF8-tables x+AF8-tables hid+AF8-generic usbhid hid psmouse virtio+AF8-net virtio+AF8-scsi net+AF8-failo io+AF8-blk failover pata+AF8-acpi i2c+AF8-piix4 +AFs-last unloaded: null+AF8-blk+AF0 +AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9 sd 4:0:0:0: Power-on or device reset occurred CPU: 0 PID: 262 Comm: kworker/0:1H Not tainted 5.0.0-rc1-dbg+- +ACM-1 Hardware name: QEMU Standard PC (i440FX +- PIIX, 1996), BIOS 1.10.2-1 04/01/2014 Workqueue: kblockd blk+AF8-mq+AF8-run+AF8-work+AF8-fn BUG: KASAN: null-ptr-deref in blk+AF8-mq+AF8-dispatch+AF8-rq+AF8-list+-0x116/0xb10 RIP: 0010:blk+AF8-mq+AF8-start+AF8-request+-0x234/0x280 Code: 01 e8 d0 d6 ad ff 85 c0 74 09 80 3d ec 2e b0 01 00 74 2c 65 ff 0d cc c7 97 7e 0f 85 53 fe ff ff e8 bc 11 96 ff e9 49 fe ff ff +ADw-0f+AD4 0b e9 79 fe ff ff 0f 0b e9 2b fe ff ff 0f 0b e9 db fe ff ff e8 Read of size 8 at addr 0000000000000138 by task kworker/2:1H/350 RSP: 0018:ffff88811468fa88 EFLAGS: 00010202 CPU: 2 PID: 350 Comm: kworker/2:1H Not tainted 5.0.0-rc1-dbg+- +ACM-1 RAX: 0000000000000001 RBX: ffff888038c24c00 RCX: ffffffff816a1546 RDX: 0000000000000007 RSI: dffffc0000000000 RDI: ffff888038c24cd4 Hardware name: QEMU Standard PC (i440FX +- PIIX, 1996), BIOS 1.10.2-1 04/01/2014 RBP: ffff88811468faa8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88810b1124f0 Workqueue: kblockd blk+AF8-mq+AF8-run+AF8-work+AF8-fn R13: ffff888038c24cd4 R14: ffff888038c24c1c R15: ffff88803ffe4400 Call Trace: dump+AF8-stack+-0x86/0xca FS: 0000000000000000(0000) GS:ffff88811b600000(0000) knlGS:0000000000000000 ? blk+AF8-mq+AF8-dispatch+AF8-rq+AF8-list+-0x116/0xb10 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kasan+AF8-report.cold.3+-0x5/0x3e CR2: 0000565114f33710 CR3: 00000001140cc003 CR4: 00000000003606f0 ? blk+AF8-mq+AF8-dispatch+AF8-rq+AF8-list+-0x116/0xb10 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 +AF8AXw-asan+AF8-load8+-0x54/0x90 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 blk+AF8-mq+AF8-dispatch+AF8-rq+AF8-list+-0x116/0xb10 Call Trace: scsi+AF8-queue+AF8-rq+-0x9d6/0x1360 ? blk+AF8-mq+AF8-flush+AF8-busy+AF8-ctxs+-0x172/0x380 blk+AF8-mq+AF8-dispatch+AF8-rq+AF8-list+-0x5fc/0xb10 ? blk+AF8-mq+AF8-get+AF8-driver+AF8-tag+-0x270/0x270 ? blk+AF8-mq+AF8-flush+AF8-busy+AF8-ctxs+-0x172/0x380 ? mark+AF8-held+AF8-locks+-0xb0/0xb0 ? blk+AF8-mq+AF8-get+AF8-driver+AF8-tag+-0x270/0x270 blk+AF8-mq+AF8-sched+AF8-dispatch+AF8-requests+-0x2f7/0x300 ? mark+AF8-held+AF8-locks+-0xb0/0xb0 ? blk+AF8-mq+AF8-sched+AF8-restart+-0x40/0x40 blk+AF8-mq+AF8-sched+AF8-dispatch+AF8-requests+-0x2f7/0x300 ? rcu+AF8-dynticks+AF8-curr+AF8-cpu+AF8-in+AF8-eqs+-0x4c/0x60 ? blk+AF8-mq+AF8-sched+AF8-restart+-0x40/0x40 ? rcu+AF8-is+AF8-watching+-0x10/0x30 ? rcu+AF8-dynticks+AF8-curr+AF8-cpu+AF8-in+AF8-eqs+-0x4c/0x60 +AF8AXw-blk+AF8-mq+AF8-run+AF8-hw+AF8-queue+-0xd6/0x180 ? rcu+AF8-is+AF8-watching+-0x10/0x30 ? blk+AF8-mq+AF8-end+AF8-request+-0x210/0x210 +AF8AXw-blk+AF8-mq+AF8-run+AF8-hw+AF8-queue+-0xd6/0x180 blk+AF8-mq+AF8-run+AF8-work+AF8-fn+-0x27/0x30 ? blk+AF8-mq+AF8-end+AF8-request+-0x210/0x210 process+AF8-one+AF8-work+-0x4ae/0xa20 blk+AF8-mq+AF8-run+AF8-work+AF8-fn+-0x27/0x30 ? pwq+AF8-dec+AF8-nr+AF8-in+AF8-flight+-0x130/0x130 process+AF8-one+AF8-work+-0x4ae/0xa20 worker+AF8-thread+-0x67/0x5b0 ? pwq+AF8-dec+AF8-nr+AF8-in+AF8-flight+-0x130/0x130 kthread+-0x1cf/0x1f0 worker+AF8-thread+-0x67/0x5b0 ? process+AF8-one+AF8-work+-0xa20/0xa20 kthread+-0x1cf/0x1f0 ? kthread+AF8-create+AF8-on+AF8-node+-0xa0/0xa0 ? process+AF8-one+AF8-work+-0xa20/0xa20 ret+AF8-from+AF8-fork+-0x24/0x30 ? kthread+AF8-create+AF8-on+AF8-node+-0xa0/0xa0 +AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9 ret+AF8-from+AF8-fork+-0x24/0x30 Disabling lock debugging due to kernel taint irq event stamp: 3962924 BUG: unable to handle kernel NULL pointer dereference at 0000000000000138 hardirqs last enabled at (3962923): +AFsAPA-ffffffff811a18d3+AD4AXQ ktime+AF8-get+-0xe3/0x120 hardirqs last disabled at (3962924): +AFsAPA-ffffffff81002859+AD4AXQ trace+AF8-hardirqs+AF8-off+AF8-thunk+-0x1a/0x1c +ACM-PF error: +AFs-normal kernel read fault+AF0 Bart.
