INFO: task udevd:6626 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:22760 pid:6626  tgid:6626  ppid:1      task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 io_schedule+0x80/0xd0 kernel/sched/core.c:7903
 folio_wait_bit_common+0x6b0/0xb90 mm/filemap.c:1317
 folio_put_wait_locked mm/filemap.c:1481 [inline]
 do_read_cache_folio+0x1aa/0x590 mm/filemap.c:3939
 read_mapping_folio include/linux/pagemap.h:991 [inline]
 read_part_sector+0xb6/0x2b0 block/partitions/core.c:722
 adfspart_check_POWERTEC+0x8c/0xf30 block/partitions/acorn.c:454
 check_partition block/partitions/core.c:141 [inline]
 blk_add_partitions block/partitions/core.c:589 [inline]
 bdev_disk_changed+0x75f/0x14b0 block/partitions/core.c:693
 blkdev_get_whole+0x380/0x510 block/bdev.c:748
 bdev_open+0x31e/0xd30 block/bdev.c:957
 blkdev_open+0x3a8/0x510 block/fops.c:691
 do_dentry_open+0x950/0x13f0 fs/open.c:965
 vfs_open+0x3b/0x340 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x2ee5/0x3830 fs/namei.c:4046
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1461
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7b824a7407
RSP: 002b:00007ffcf4fb7b70 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f7b82b47880 RCX: 00007f7b824a7407
RDX: 00000000000a0800 RSI: 0000564beff43320 RDI: ffffffffffffff9c
RBP: 0000564beff26910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000564beff40320
R13: 0000564beff34190 R14: 0000000000000000 R15: 0000564beff40320
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
 watchdog+0xf93/0xfe0 kernel/hung_task.c:491
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16572 Comm: syz.2.2686 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:mark_reg_read+0x4f/0x650 kernel/bpf/verifier.c:3565
Code: 1c 24 49 bd 00 00 00 00 00 fc ff df 4d 8d 67 60 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 55 e7 4b 00 49 8b 1c 24 <40> 0f b6 f5 89 74 24 0c bf 02 00 00 00 e8 ef 80 e8 ff 49 39 de 74
RSP: 0018:ffffc9001b59f0b8 EFLAGS: 00000246
RAX: 1ffff1100a67c01b RBX: ffff888031e50078 RCX: 0000000000080000
RDX: ffffc9000d66d000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 0000000000000002 R08: ffff88805463da00 R09: 000000000000000a
R10: 0000000000000013 R11: 0000000000000002 R12: ffff8880533e00d8
R13: dffffc0000000000 R14: ffff888031e52078 R15: ffff8880533e0078
FS:  00007f35c67ea6c0(0000) GS:ffff888125d1a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffecd05dff8 CR3: 000000002fd52000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 propagate_liveness_reg kernel/bpf/verifier.c:19017 [inline]
 propagate_liveness+0x20c/0x900 kernel/bpf/verifier.c:19056
 is_state_visited kernel/bpf/verifier.c:19460 [inline]
 do_check+0x6b7e/0xe520 kernel/bpf/verifier.c:20026
 do_check_common+0x1949/0x24f0 kernel/bpf/verifier.c:23260
 do_check_main kernel/bpf/verifier.c:23343 [inline]
 bpf_check+0x1746a/0x1d2d0 kernel/bpf/verifier.c:24703
 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2979
 __sys_bpf+0x528/0x870 kernel/bpf/syscall.c:6029
 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6137 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6137
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f35c598ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f35c67ea038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f35c5bb6090 RCX: 00007f35c598ebe9
RDX: 0000000000000094 RSI: 0000200000000a40 RDI: 0000000000000005
RBP: 00007f35c5a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f35c5bb6128 R14: 00007f35c5bb6090 R15: 00007ffd74e08038
 </TASK>