Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 BUG: unable to handle kernel NULL pointer dereference at 0000000000000118 PGD 1d38c7067 P4D 1d38c7067 PUD 1c5738067 PMD 0 Oops: 0002 [#1] PREEMPT SMP KASAN should_fail_alloc_page mm/page_alloc.c:3057 [inline] prepare_alloc_pages mm/page_alloc.c:4326 [inline] __alloc_pages_nodemask+0x34b/0xde0 mm/page_alloc.c:4364 CPU: 1 PID: 17042 Comm: syz-executor2 Not tainted 4.19.0-rc8+ #63 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:cpumask_set_cpu include/linux/cpumask.h:311 [inline] RIP: 0010:blk_mq_map_swqueue+0x29c/0xa70 block/blk-mq.c:2336 Code: 80 3c 1a 00 0f 85 fa 06 00 00 44 89 ee bf 3f 00 00 00 4d 8b 24 24 e8 a3 20 06 fe 41 83 fd 3f 0f 87 1c 05 00 00 e8 84 1f 06 fe 4d 0f ab b4 24 18 01 00 00 49 8d bc 24 74 01 00 00 48 89 fa 48 RSP: 0018:ffff880186a474e0 EFLAGS: 00010246 RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc9000fd11000 RDX: 0000000000040000 RSI: ffffffff837889cc RDI: 0000000000000005 RBP: ffff880186a47550 R08: ffff88018039a600 R09: 0000000000000000 R10: ffffed00302d9ff0 R11: ffff8801816cff83 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000001 R15: ffff8801d1b69000 FS: 00007f8d64b8e700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] alloc_pages_node include/linux/gfp.h:500 [inline] alloc_thread_stack_node kernel/fork.c:241 [inline] dup_task_struct kernel/fork.c:806 [inline] copy_process+0xa09/0x8780 kernel/fork.c:1707 CR2: 0000000000000118 CR3: 00000001c2b5d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: blk_mq_queue_reinit block/blk-mq.c:2675 [inline] __blk_mq_update_nr_hw_queues block/blk-mq.c:2994 [inline] blk_mq_update_nr_hw_queues+0xb2a/0xe50 block/blk-mq.c:3008 nbd_start_device+0x1d2/0xcd0 drivers/block/nbd.c:1154 nbd_start_device_ioctl drivers/block/nbd.c:1195 [inline] __nbd_ioctl drivers/block/nbd.c:1266 [inline] nbd_ioctl+0x6af/0xd40 drivers/block/nbd.c:1306 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x9ac/0x2010 block/ioctl.c:601 block_ioctl+0xee/0x130 fs/block_dev.c:1883 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 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 b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8d64b8dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f8d64b8dc90 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000005 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 _do_fork+0x1cb/0x11d0 kernel/fork.c:2166 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8d64b8e6d4 R13: 00000000004c04ad R14: 00000000004d0660 R15: 0000000000000006 Modules linked in: CR2: 0000000000000118 ---[ end trace bf9350e87d5514aa ]--- RIP: 0010:cpumask_set_cpu include/linux/cpumask.h:311 [inline] RIP: 0010:blk_mq_map_swqueue+0x29c/0xa70 block/blk-mq.c:2336 Code: 80 3c 1a 00 0f 85 fa 06 00 00 44 89 ee bf 3f 00 00 00 4d 8b 24 24 e8 a3 20 06 fe 41 83 fd 3f 0f 87 1c 05 00 00 e8 84 1f 06 fe 4d 0f ab b4 24 18 01 00 00 49 8d bc 24 74 01 00 00 48 89 fa 48 __do_sys_clone kernel/fork.c:2273 [inline] __se_sys_clone kernel/fork.c:2267 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2267 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 RSP: 0018:ffff880186a474e0 EFLAGS: 00010246 RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc9000fd11000 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 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 b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f269e06dc78 EFLAGS: 00000246 RDX: 0000000000040000 RSI: ffffffff837889cc RDI: 0000000000000005 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f269e06dc90 RCX: 0000000000457569 RDX: 0000000020000080 RSI: 0000000020000040 RDI: 0000000000040000 RBP: 000000000072bf00 R08: 0000000020000100 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 00007f269e06e6d4 R13: 00000000004bd9e6 R14: 00000000004cc448 R15: 0000000000000003 kobject: 'loop5' (00000000deec2b24): kobject_uevent_env kobject: 'loop1' (00000000624e18c7): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000624e18c7): kobject_uevent_env kobject: 'loop1' (00000000624e18c7): kobject_uevent_env kobject: 'loop1' (00000000624e18c7): fill_kobj_path: path = '/devices/virtual/block/loop1' RBP: ffff880186a47550 R08: ffff88018039a600 R09: 0000000000000000 kobject: 'loop5' (00000000deec2b24): fill_kobj_path: path = '/devices/virtual/block/loop5' R10: ffffed00302d9ff0 R11: ffff8801816cff83 R12: 0000000000000000 kobject: 'loop1' (00000000624e18c7): fill_kobj_path: path = '/devices/virtual/block/loop1' R13: 0000000000000001 R14: 0000000000000001 R15: ffff8801d1b69000 kobject: 'loop5' (00000000deec2b24): kobject_uevent_env kobject: 'loop5' (00000000deec2b24): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000624e18c7): kobject_uevent_env FS: 00007f8d64b8e700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 kobject: 'loop4' (000000008a3132e9): kobject_uevent_env kobject: 'loop1' (00000000624e18c7): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (000000008a3132e9): fill_kobj_path: path = '/devices/virtual/block/loop4' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faa3fcea169 CR3: 00000001c2b5d000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop5' (00000000deec2b24): kobject_uevent_env DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'loop5' (00000000deec2b24): fill_kobj_path: path = '/devices/virtual/block/loop5' XFS (loop1): SB sanity check failed