RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000007 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f95a001a6d4 R13: 00000000004c3301 R14: 00000000004d6c08 R15: 0000000000000009 block nbd4: shutting down sockets BUG: unable to handle kernel NULL pointer dereference at 0000000000000118 kobject: 'loop5' (0000000072917bf8): kobject_uevent_env PGD 563ea067 P4D 563ea067 PUD 9365d067 PMD 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 1 PID: 1804 Comm: syz-executor.2 Not tainted 4.19.75 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'loop5' (0000000072917bf8): fill_kobj_path: path = '/devices/virtual/block/loop5' RIP: 0010:set_bit arch/x86/include/asm/bitops.h:76 [inline] RIP: 0010:cpumask_set_cpu include/linux/cpumask.h:311 [inline] RIP: 0010:blk_mq_map_swqueue+0x29e/0xa60 block/blk-mq.c:2340 Code: 80 3c 18 00 0f 85 e9 06 00 00 44 89 e6 bf 3f 00 00 00 4d 8b 6d 00 e8 81 6d 56 fe 41 83 fc 3f 0f 87 17 05 00 00 e8 f2 6b 56 fe 4d 0f ab b5 18 01 00 00 49 8d bd 74 01 00 00 48 89 fa 48 c1 ea RSP: 0018:ffff88803f7af8c0 EFLAGS: 00010246 RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc9000a299000 kobject: 'loop4' (000000008848b6a5): kobject_uevent_env RDX: 0000000000040000 RSI: ffffffff8314f68e RDI: 0000000000000005 RBP: ffff88803f7af930 R08: ffff8880935ea380 R09: 0000000000000000 R10: ffffed1009625ff0 R11: ffff88804b12ff83 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880a414c000 kobject: 'kvm' (000000005b56549f): kobject_uevent_env FS: 00007f95a001a700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000118 CR3: 00000000a9599000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kobject: 'loop4' (000000008848b6a5): fill_kobj_path: path = '/devices/virtual/block/loop4' blk_mq_queue_reinit block/blk-mq.c:2682 [inline] __blk_mq_update_nr_hw_queues block/blk-mq.c:3003 [inline] blk_mq_update_nr_hw_queues+0x5ab/0xb70 block/blk-mq.c:3017 kobject: 'loop0' (000000001afd45b4): kobject_uevent_env nbd_start_device+0x15e/0xbb0 drivers/block/nbd.c:1155 nbd_start_device_ioctl drivers/block/nbd.c:1196 [inline] __nbd_ioctl drivers/block/nbd.c:1267 [inline] nbd_ioctl+0x412/0xc60 drivers/block/nbd.c:1307 kobject: 'kvm' (000000005b56549f): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop0' (000000001afd45b4): fill_kobj_path: path = '/devices/virtual/block/loop0' __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0xc38/0x1ab6 block/ioctl.c:601 kobject: 'kvm' (000000005b56549f): kobject_uevent_env kobject: 'kvm' (000000005b56549f): fill_kobj_path: path = '/devices/virtual/misc/kvm' block_ioctl+0xee/0x130 fs/block_dev.c:1891 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688 ksys_ioctl+0xab/0xd0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459a09 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f95a0019c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f95a0019c90 RCX: 0000000000459a09 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000007 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f95a001a6d4 R13: 00000000004c3301 R14: 00000000004d6c08 R15: 0000000000000009 Modules linked in: CR2: 0000000000000118 kobject: 'loop1' (00000000a7602607): kobject_uevent_env block nbd4: Receive control failed (result -22) block nbd5: Receive control failed (result -22) kobject: 'loop1' (00000000a7602607): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'nbd4' (00000000adc7c199): kobject_uevent_env kobject: 'nbd5' (0000000012e294b3): kobject_uevent_env ---[ end trace d3cd1d773a33279b ]--- kobject: 'nbd5' (0000000012e294b3): fill_kobj_path: path = '/devices/virtual/block/nbd5' RIP: 0010:set_bit arch/x86/include/asm/bitops.h:76 [inline] RIP: 0010:cpumask_set_cpu include/linux/cpumask.h:311 [inline] RIP: 0010:blk_mq_map_swqueue+0x29e/0xa60 block/blk-mq.c:2340 kobject: 'nbd4' (00000000adc7c199): fill_kobj_path: path = '/devices/virtual/block/nbd4' Code: 80 3c 18 00 0f 85 e9 06 00 00 44 89 e6 bf 3f 00 00 00 4d 8b 6d 00 e8 81 6d 56 fe 41 83 fc 3f 0f 87 17 05 00 00 e8 f2 6b 56 fe 4d 0f ab b5 18 01 00 00 49 8d bd 74 01 00 00 48 89 fa 48 c1 ea block nbd5: shutting down sockets RSP: 0018:ffff88803f7af8c0 EFLAGS: 00010246 block nbd4: shutting down sockets RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc9000a299000 RDX: 0000000000040000 RSI: ffffffff8314f68e RDI: 0000000000000005 RBP: ffff88803f7af930 R08: ffff8880935ea380 R09: 0000000000000000 kobject: 'loop5' (0000000072917bf8): kobject_uevent_env kobject: 'loop5' (0000000072917bf8): fill_kobj_path: path = '/devices/virtual/block/loop5' R10: ffffed1009625ff0 R11: ffff88804b12ff83 R12: 0000000000000001 kobject: 'loop4' (000000008848b6a5): kobject_uevent_env R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880a414c000 kobject: 'loop4' (000000008848b6a5): fill_kobj_path: path = '/devices/virtual/block/loop4' FS: 00007f95a001a700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 kobject: 'loop3' (00000000c6e2bfc1): kobject_uevent_env kobject: 'loop3' (00000000c6e2bfc1): fill_kobj_path: path = '/devices/virtual/block/loop3' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000070f158 CR3: 00000000a9599000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400