INFO: task udevd:25972 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:23688 pid:25972 tgid:25972 ppid:4988   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5504 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7228
 __schedule_loop kernel/sched/core.c:7307 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7322
 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
 wait_for_reconnect drivers/block/nbd.c:1107 [inline]
 nbd_handle_cmd drivers/block/nbd.c:1149 [inline]
 nbd_queue_rq+0x889/0x1150 drivers/block/nbd.c:1207
 blk_mq_dispatch_rq_list+0x499/0x1990 block/blk-mq.c:2117
 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:168 [inline]
 blk_mq_do_dispatch_sched block/blk-mq-sched.c:182 [inline]
 __blk_mq_sched_dispatch_requests+0xd36/0x1580 block/blk-mq-sched.c:307
 blk_mq_sched_dispatch_requests+0xd7/0x190 block/blk-mq-sched.c:329
 blk_mq_run_hw_queue+0x348/0x4f0 block/blk-mq.c:2356
 blk_mq_dispatch_list+0xd11/0xe10 include/linux/spinlock.h:-1
 blk_mq_flush_plug_list+0x45f/0x540 block/blk-mq.c:2966
 __blk_flush_plug+0x3ed/0x4d0 block/blk-core.c:1273
 blk_finish_plug block/blk-core.c:1300 [inline]
 __submit_bio+0x465/0x560 block/blk-core.c:690
 __submit_bio_noacct_mq block/blk-core.c:763 [inline]
 submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:797
 bh_submit fs/buffer.c:1239 [inline]
 block_read_full_folio+0x581/0x810 fs/buffer.c:2449
 filemap_read_folio+0x12c/0x3a0 mm/filemap.c:2513
 do_read_cache_folio+0x354/0x590 mm/filemap.c:4118
 read_mapping_folio include/linux/pagemap.h:1017 [inline]
 read_part_sector+0xb6/0x2b0 block/partitions/core.c:724
 adfspart_check_ICS+0xb1/0x960 block/partitions/acorn.c:357
 check_partition block/partitions/core.c:143 [inline]
 blk_add_partitions block/partitions/core.c:591 [inline]
 bdev_disk_changed+0x851/0x17a0 block/partitions/core.c:695
 blkdev_get_whole+0x372/0x510 block/bdev.c:751
 bdev_open+0x324/0xd70 block/bdev.c:960
 blkdev_open+0x461/0x600 block/fops.c:672
 do_dentry_open+0x816/0x1380 fs/open.c:947
 vfs_open+0x3b/0x340 fs/open.c:1079
 do_open fs/namei.c:4700 [inline]
 path_openat+0x2e44/0x3830 fs/namei.c:4859
 do_file_open+0x23e/0x4a0 fs/namei.c:4888
 do_sys_openat2+0x115/0x200 fs/open.c:1395
 do_sys_open fs/open.c:1401 [inline]
 __do_sys_openat fs/open.c:1417 [inline]
 __se_sys_openat fs/open.c:1412 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1412
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff94cea7407
RSP: 002b:00007ffe6a277bd0 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff94d56b880 RCX: 00007ff94cea7407
RDX: 00000000000a0800 RSI: 0000563ec1790410 RDI: ffffffffffffff9c
RBP: 0000563ec177d910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000563ec17a5a40
R13: 0000563ec178b190 R14: 0000000000000000 R15: 0000563ec17a5a40
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
 watchdog+0xfd7/0x1030 kernel/hung_task.c:561
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10533 Comm: kworker/u8:38 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: krds_cp_wq#0/1 rds_connect_worker
RIP: 0010:__inet6_bind+0x1b9/0xf30 net/ipv6/af_inet6.c:-1
Code: 89 ee e8 3a e6 77 f7 83 fd 01 75 0f e8 90 e2 77 f7 b8 ea ff ff ff e9 32 02 00 00 4c 89 64 24 38 e8 7c e2 77 f7 4c 89 6c 24 30 <49> 89 dc 49 8d 6f 02 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc
RSP: 0018:ffffc90002f0f778 EFLAGS: 00000293
RAX: ffffffff8a4e1341 RBX: ffff888062a06c00 RCX: ffff8880562c5d00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff8880562c5d00 R09: 0000000000000002
R10: 000000000000c0fe R11: 0000000000000000 R12: ffff888062a07880
R13: ffffc90002f0f848 R14: 1ffff1100c540d82 R15: ffffc90002f0f840
FS:  0000000000000000(0000) GS:ffff88812527c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ac314b7ee8 CR3: 000000000e746000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kernel_bind+0x13e/0x1c0 net/socket.c:3646
 rds_tcp_conn_path_connect+0x53b/0x920 net/rds/tcp_connect.c:175
 rds_connect_worker+0x1d8/0x290 net/rds/threads.c:176
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>