RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000005 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f289b3b56d4 R13: 00000000004c3e13 R14: 00000000004d81b8 R15: 0000000000000009 BUG: unable to handle kernel NULL pointer dereference at 0000000000000120 kobject: 'batman_adv' (ffff8880a5f54c80): kobject_add_internal: parent: 'veth131', set: '' 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+0x25e/0x9c0 block/blk-mq.c:2171 PGD a0c4a067 P4D a0c4a067 PUD 7f104067 PMD 0 Oops: 0002 [#1] PREEMPT SMP KASAN Modules linked in: kobject: 'veth145' (ffff88804e77ea70): kobject_cleanup, parent (null) CPU: 0 PID: 17754 Comm: syz-executor.0 Not tainted 4.14.153 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88808df36580 task.stack: ffff888098138000 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+0x25e/0x9c0 block/blk-mq.c:2171 RSP: 0018:ffff88809813fa48 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000001 RCX: ffffc90006173000 kobject: 'veth145' (ffff88804e77ea70): calling ktype release RDX: 0000000000000000 RSI: ffffffff82ca031a RDI: ffff8880a4a14288 RBP: ffff88809813fac0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffff88809813f8e0 R12: 0000000000000001 R13: ffff888219205a00 R14: dffffc0000000000 R15: ffff8880a4bf8fb0 FS: 00007f289b3b5700(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000120 CR3: 000000004e6b4000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kobject: 'veth145': free name blk_mq_queue_reinit block/blk-mq.c:2512 [inline] __blk_mq_update_nr_hw_queues block/blk-mq.c:2746 [inline] blk_mq_update_nr_hw_queues+0x21c/0x3a0 block/blk-mq.c:2756 nbd_start_device+0x1d7/0xc50 drivers/block/nbd.c:1185 kobject: 'veth144' (ffff88805d4151b0): kobject_cleanup, parent (null) nbd_start_device_ioctl drivers/block/nbd.c:1226 [inline] __nbd_ioctl drivers/block/nbd.c:1308 [inline] nbd_ioctl+0x43d/0xb30 drivers/block/nbd.c:1348 kobject: 'veth144' (ffff88805d4151b0): calling ktype release __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x96b/0x1860 block/ioctl.c:594 kobject: 'veth144': free name block_ioctl+0xde/0x120 fs/block_dev.c:1881 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684 netlink: 20 bytes leftover after parsing attributes in process `syz-executor.4'. kobject: 'veth144' (ffff88805be5efb0): kobject_add_internal: parent: 'net', set: 'devices' SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a219 RSP: 002b:00007f289b3b4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f289b3b4c90 RCX: 000000000045a219 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000005 kobject: 'veth144' (ffff88805be5efb0): kobject_uevent_env RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f289b3b56d4 R13: 00000000004c3e13 R14: 00000000004d81b8 R15: 0000000000000009 Code: ea 03 42 80 3c 32 00 0f 85 94 06 00 00 41 83 kobject: 'veth144' (ffff88805be5efb0): fill_kobj_path: path = '/devices/virtual/net/veth144' fc 3f 48 8b 17 0f 87 4b 04 00 00 48 89 55 c8 48 89 45 d0 e8 kobject: 'queues' (ffff88807a49f948): kobject_add_internal: parent: 'veth144', set: '' e6 f0 92 fe 48 8b 55 c8 48 0f ab 9a 20 01 00 00 48 8d ba 78 01 00 00 kobject: 'queues' (ffff88807a49f948): kobject_uevent_env 48 8b 45 d0 48 RIP: set_bit arch/x86/include/asm/bitops.h:81 [inline] RSP: ffff88809813fa48 RIP: cpumask_set_cpu include/linux/cpumask.h:283 [inline] RSP: ffff88809813fa48 RIP: blk_mq_map_swqueue+0x25e/0x9c0 block/blk-mq.c:2171 RSP: ffff88809813fa48 CR2: 0000000000000120 kobject: 'loop4' (ffff8880a4aaf2a0): kobject_uevent_env kobject: 'queues' (ffff88807a49f948): kobject_uevent_env: filter function caused the event to drop! kobject: 'loop4' (ffff8880a4aaf2a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'rx-0' (ffff8880a5a96a90): kobject_add_internal: parent: 'queues', set: 'queues' ---[ end trace 3cf297779b055577 ]--- kobject: 'rx-0' (ffff8880a5a96a90): kobject_uevent_env