RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000005 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 R13: 00000000000003fd R14: 00000000004c551d R15: 0000000000000008 CPU: 1 PID: 7089 Comm: syz-executor.2 Not tainted 4.14.212-syzkaller #0 BUG: unable to handle kernel Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 NULL pointer dereference Call Trace: at 0000000000000120 __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xf7/0x13b lib/dump_stack.c:58 IP: set_bit arch/x86/include/asm/bitops.h:81 [inline] IP: cpumask_set_cpu include/linux/cpumask.h:283 [inline] IP: blk_mq_map_swqueue+0x23a/0xa90 block/blk-mq.c:2171 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.3+0x105/0x14b lib/fault-inject.c:149 PGD 1d80cd067 should_failslab+0xba/0xf0 mm/failslab.c:32 P4D 1d80cd067 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3376 [inline] kmem_cache_alloc_trace+0x2ea/0x7a0 mm/slab.c:3616 PUD 1d9c86067 PMD 0 kmalloc include/linux/slab.h:488 [inline] __kthread_create_on_node+0xe9/0x3a0 kernel/kthread.c:277 Oops: 0002 [#1] PREEMPT SMP KASAN Modules linked in: kthread_create_on_node+0x83/0xa0 kernel/kthread.c:365 CPU: 0 PID: 7084 Comm: syz-executor.0 Not tainted 4.14.212-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 __alloc_workqueue_key+0x925/0xc80 kernel/workqueue.c:4041 task: ffff8881d76f6640 task.stack: ffff8881e30c0000 RIP: 0010:set_bit arch/x86/include/asm/bitops.h:81 [inline] RIP: 0010:cpumask_set_cpu include/linux/cpumask.h:283 [inline] RIP: 0010:blk_mq_map_swqueue+0x23a/0xa90 block/blk-mq.c:2171 RSP: 0018:ffff8881e30c79e0 EFLAGS: 00010293 RAX: ffff8881ed225588 RBX: 0000000000000007 RCX: ffffe8ffffd30840 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000 nbd_start_device+0x14d/0xc50 drivers/block/nbd.c:1185 RBP: ffff8881e30c7a58 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8881ed225580 R11: ffff8881ed225640 R12: ffff8881ed221040 R13: fffffbfff116527e R14: ffff8881ed390fb0 R15: dffffc0000000000 nbd_start_device_ioctl drivers/block/nbd.c:1244 [inline] __nbd_ioctl drivers/block/nbd.c:1326 [inline] nbd_ioctl+0x1ae/0xad0 drivers/block/nbd.c:1366 FS: 00007ff7864f8700(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000120 CR3: 00000001d7cd4006 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x7d2/0x1770 block/ioctl.c:594 Call Trace: blk_mq_queue_reinit block/blk-mq.c:2512 [inline] __blk_mq_update_nr_hw_queues block/blk-mq.c:2750 [inline] blk_mq_update_nr_hw_queues+0x219/0x390 block/blk-mq.c:2760 nbd_start_device+0x1b6/0xc50 drivers/block/nbd.c:1193 nbd_start_device_ioctl drivers/block/nbd.c:1244 [inline] __nbd_ioctl drivers/block/nbd.c:1326 [inline] nbd_ioctl+0x1ae/0xad0 drivers/block/nbd.c:1366 block_ioctl+0xd7/0x130 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x7d2/0x1770 block/ioctl.c:594 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x74/0x80 fs/ioctl.c:692 block_ioctl+0xd7/0x130 fs/block_dev.c:1893 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45b3c9 RSP: 002b:00007f01d0765c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f01d07666d4 RCX: 000000000045b3c9 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000005 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x74/0x80 fs/ioctl.c:692 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 R13: 00000000000003fd R14: 00000000004c551d R15: 0000000000000008 block nbd2: Could not allocate knbd recv work queue. entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45b3c9 RSP: 002b:00007ff7864f7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff7864f86d4 RCX: 000000000045b3c9 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000005 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 R13: 00000000000003fd R14: 00000000004c551d R15: 0000000000000008 Code: 0f 85 dd 05 00 00 8b 00 49 8d 04 c2 48 89 c6 48 c1 ee 03 42 80 3c 3e 00 0f 85 98 05 00 00 41 83 f8 3f 48 8b 30 0f 87 f3 03 00 00 4c 0f ab 8e 20 01 00 00 48 8d be 78 01 00 00 48 89 f8 48 c1 RIP: set_bit arch/x86/include/asm/bitops.h:81 [inline] RSP: ffff8881e30c79e0 RIP: cpumask_set_cpu include/linux/cpumask.h:283 [inline] RSP: ffff8881e30c79e0 RIP: blk_mq_map_swqueue+0x23a/0xa90 block/blk-mq.c:2171 RSP: ffff8881e30c79e0 CR2: 0000000000000120 IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready block nbd2: shutting down sockets IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready ---[ end trace 77e0dee34350ebaa ]--- IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready