INFO: task jbd2/sda1-8:5174 blocked for more than 143 seconds.
      Tainted: G     U    I         6.15.0-rc3-syzkaller-00008-ga33b5a08cbbd #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8     state:D stack:26376 pid:5174  tgid:5174  ppid:2      task_flags:0x240040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x116f/0x5de0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6860
 io_schedule+0xbf/0x130 kernel/sched/core.c:7742
 bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:247
 __wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:105 [inline]
 __wait_on_buffer+0x64/0x70 fs/buffer.c:123
 wait_on_buffer include/linux/buffer_head.h:413 [inline]
 jbd2_journal_commit_transaction+0x382e/0x6830 fs/jbd2/commit.c:808
 kjournald2+0x1f4/0x760 fs/jbd2/journal.c:201
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
INFO: task syz-executor:5828 blocked for more than 143 seconds.
      Tainted: G     U    I         6.15.0-rc3-syzkaller-00008-ga33b5a08cbbd #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:23432 pid:5828  tgid:5828  ppid:5826   task_flags:0x440100 flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x116f/0x5de0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6860
 io_schedule+0xbf/0x130 kernel/sched/core.c:7742
 bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:247
 __wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:105 [inline]
 do_get_write_access+0x93d/0x12a0 fs/jbd2/transaction.c:1092
 jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1241
 __ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:241
 ext4_reserve_inode_write+0x1be/0x320 fs/ext4/inode.c:5892
 __ext4_mark_inode_dirty+0x197/0x870 fs/ext4/inode.c:6066
 ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6103
 __mark_inode_dirty+0x1eb/0xe50 fs/fs-writeback.c:2527
 generic_update_time+0xcf/0xf0 fs/inode.c:2064
 inode_update_time fs/inode.c:2077 [inline]
 __file_update_time fs/inode.c:2305 [inline]
 file_update_time+0x17d/0x1c0 fs/inode.c:2335
 ext4_page_mkwrite+0x35e/0x1750 fs/ext4/inode.c:6221
 do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 do_shared_fault mm/memory.c:5594 [inline]
 do_fault mm/memory.c:5656 [inline]
 do_pte_missing+0x29c/0x3fb0 mm/memory.c:4160
 handle_pte_fault mm/memory.c:5997 [inline]
 __handle_mm_fault+0x103d/0x2a40 mm/memory.c:6140
 handle_mm_fault+0x3fe/0xad0 mm/memory.c:6309
 do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1337
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f9898e775ef
RSP: 002b:00007ffdd215f960 EFLAGS: 00010202
RAX: 00007f98977cc000 RBX: 000055558bf6a0a0 RCX: 0000000000000001
RDX: 1ffffffff041ebc1 RSI: 000055558bf741c8 RDI: 0000000000000002
RBP: 00007ffdd215fc50 R08: 000055558bf741c8 R09: 0000000000003d78
R10: 0000000000000001 R11: 00007ffdd215fe60 R12: 00007ffdd215fcb0
R13: 0000000000000004 R14: 00007ffdd215f9d0 R15: 00007ffdd215faa0
 </TASK>
INFO: task syz.8.5035:25291 blocked for more than 143 seconds.
      Tainted: G     U    I         6.15.0-rc3-syzkaller-00008-ga33b5a08cbbd #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.5035      state:D stack:26488 pid:25291 tgid:25291 ppid:23460  task_flags:0x440040 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x116f/0x5de0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6860
 io_schedule+0xbf/0x130 kernel/sched/core.c:7742
 bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:247
 __wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:105 [inline]
 do_get_write_access+0x93d/0x12a0 fs/jbd2/transaction.c:1092
 jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1241
 __ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:241
 ext4_reserve_inode_write+0x1be/0x320 fs/ext4/inode.c:5892
 __ext4_mark_inode_dirty+0x197/0x870 fs/ext4/inode.c:6066
 ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6103
 __mark_inode_dirty+0x1eb/0xe50 fs/fs-writeback.c:2527
 generic_update_time+0xcf/0xf0 fs/inode.c:2064
 inode_update_time fs/inode.c:2077 [inline]
 __file_update_time fs/inode.c:2305 [inline]
 file_update_time+0x17d/0x1c0 fs/inode.c:2335
 ext4_page_mkwrite+0x35e/0x1750 fs/ext4/inode.c:6221
 do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 do_shared_fault mm/memory.c:5594 [inline]
 do_fault mm/memory.c:5656 [inline]
 do_pte_missing+0x29c/0x3fb0 mm/memory.c:4160
 handle_pte_fault mm/memory.c:5997 [inline]
 __handle_mm_fault+0x103d/0x2a40 mm/memory.c:6140
 handle_mm_fault+0x3fe/0xad0 mm/memory.c:6309
 do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1337
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f951ca6e2fa
RSP: 002b:00007fffe55d09a0 EFLAGS: 00010202
RAX: 0000001b2da0e000 RBX: 00007f951d8e5720 RCX: 0000001b2da0dff8
RDX: 0000001b2d620220 RSI: 0000000000000008 RDI: 00007f951d8e5720
RBP: ffffffff8948171c R08: 00007f951cdb6038 R09: 00007f951cda2000
R10: 00007f951c1ff008 R11: 0000000000000008 R12: 0000000000000008
R13: 00000000000001bf R14: ffffffff89481b92 R15: 00000000000001ee
 </TASK>
INFO: task syz.7.5040:25302 blocked for more than 144 seconds.
      Tainted: G     U    I         6.15.0-rc3-syzkaller-00008-ga33b5a08cbbd #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.5040      state:D stack:26488 pid:25302 tgid:25302 ppid:17767  task_flags:0x440040 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x116f/0x5de0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6860
 io_schedule+0xbf/0x130 kernel/sched/core.c:7742
 bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:247
 __wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:105 [inline]
 do_get_write_access+0x93d/0x12a0 fs/jbd2/transaction.c:1092
 jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1241
 __ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:241
 ext4_reserve_inode_write+0x1be/0x320 fs/ext4/inode.c:5892
 __ext4_mark_inode_dirty+0x197/0x870 fs/ext4/inode.c:6066
 ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6103
 __mark_inode_dirty+0x1eb/0xe50 fs/fs-writeback.c:2527
 generic_update_time+0xcf/0xf0 fs/inode.c:2064
 inode_update_time fs/inode.c:2077 [inline]
 __file_update_time fs/inode.c:2305 [inline]
 file_update_time+0x17d/0x1c0 fs/inode.c:2335
 ext4_page_mkwrite+0x35e/0x1750 fs/ext4/inode.c:6221
 do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 do_shared_fault mm/memory.c:5594 [inline]
 do_fault mm/memory.c:5656 [inline]
 do_pte_missing+0x29c/0x3fb0 mm/memory.c:4160
 handle_pte_fault mm/memory.c:5997 [inline]
 __handle_mm_fault+0x103d/0x2a40 mm/memory.c:6140
 handle_mm_fault+0x3fe/0xad0 mm/memory.c:6309
 do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1337
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fd73be6e2fa
RSP: 002b:00007ffcda2d0f10 EFLAGS: 00010202
RAX: 0000001b31717000 RBX: 00007fd73cce5720 RCX: 0000001b31716ff8
RDX: 0000001b31320220 RSI: 0000000000000008 RDI: 00007fd73cce5720
RBP: ffffffff847efce5 R08: 00007fd73c1b6118 R09: 00007fd73c1a2000
R10: 00007fd73b1fd008 R11: 0000000000000009 R12: 0000000000000009
R13: 0000000000000022 R14: ffffffff847efcda R15: 0000000000000044
 </TASK>
INFO: task syz.6.5042:25304 blocked for more than 144 seconds.
      Tainted: G     U    I         6.15.0-rc3-syzkaller-00008-ga33b5a08cbbd #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.5042      state:D stack:26488 pid:25304 tgid:25304 ppid:22623  task_flags:0x440040 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x116f/0x5de0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6860
 io_schedule+0xbf/0x130 kernel/sched/core.c:7742
 bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:247
 __wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:105 [inline]
 do_get_write_access+0x93d/0x12a0 fs/jbd2/transaction.c:1092
 jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1241
 __ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:241
 ext4_reserve_inode_write+0x1be/0x320 fs/ext4/inode.c:5892
 __ext4_mark_inode_dirty+0x197/0x870 fs/ext4/inode.c:6066
 ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6103
 __mark_inode_dirty+0x1eb/0xe50 fs/fs-writeback.c:2527
 generic_update_time+0xcf/0xf0 fs/inode.c:2064
 inode_update_time fs/inode.c:2077 [inline]
 __file_update_time fs/inode.c:2305 [inline]
 file_update_time+0x17d/0x1c0 fs/inode.c:2335
 ext4_page_mkwrite+0x35e/0x1750 fs/ext4/inode.c:6221
 do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 do_shared_fault mm/memory.c:5594 [inline]
 do_fault mm/memory.c:5656 [inline]
 do_pte_missing+0x29c/0x3fb0 mm/memory.c:4160
 handle_pte_fault mm/memory.c:5997 [inline]
 __handle_mm_fault+0x103d/0x2a40 mm/memory.c:6140
 handle_mm_fault+0x3fe/0xad0 mm/memory.c:6309
 do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1337
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fa9e266e2fa
RSP: 002b:00007fff5020e2e0 EFLAGS: 00010202
RAX: 0000001b3130a000 RBX: 00007fa9e34e5720 RCX: 0000001b31309ff8
RDX: 0000001b30f20220 RSI: 0000000000000008 RDI: 00007fa9e34e5720
RBP: ffffffff8904ec94 R08: 00007fa9e29b6118 R09: 00007fa9e29a2000
R10: 00007fa9e19fd008 R11: 0000000000000012 R12: 0000000000000012
R13: 0000000000000198 R14: ffffffff8904eb65 R15: 0000000000000731
 </TASK>
INFO: task syz.2.5043:25308 blocked for more than 144 seconds.
      Tainted: G     U    I         6.15.0-rc3-syzkaller-00008-ga33b5a08cbbd #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.5043      state:D stack:26488 pid:25308 tgid:25308 ppid:23338  task_flags:0x440040 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x116f/0x5de0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6860
 io_schedule+0xbf/0x130 kernel/sched/core.c:7742
 bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:247
 __wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49
 out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:64
 wait_on_bit_io include/linux/wait_bit.h:105 [inline]
 do_get_write_access+0x93d/0x12a0 fs/jbd2/transaction.c:1092
 jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1241
 __ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:241
 ext4_reserve_inode_write+0x1be/0x320 fs/ext4/inode.c:5892
 __ext4_mark_inode_dirty+0x197/0x870 fs/ext4/inode.c:6066
 ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6103
 __mark_inode_dirty+0x1eb/0xe50 fs/fs-writeback.c:2527
 generic_update_time+0xcf/0xf0 fs/inode.c:2064
 inode_update_time fs/inode.c:2077 [inline]
 __file_update_time fs/inode.c:2305 [inline]
 file_update_time+0x17d/0x1c0 fs/inode.c:2335
 ext4_page_mkwrite+0x35e/0x1750 fs/ext4/inode.c:6221
 do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 do_shared_fault mm/memory.c:5594 [inline]
 do_fault mm/memory.c:5656 [inline]
 do_pte_missing+0x29c/0x3fb0 mm/memory.c:4160
 handle_pte_fault mm/memory.c:5997 [inline]
 __handle_mm_fault+0x103d/0x2a40 mm/memory.c:6140
 handle_mm_fault+0x3fe/0xad0 mm/memory.c:6309
 do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1337
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fed5e26e2fa
RSP: 002b:00007ffe3ea61720 EFLAGS: 00010202
RAX: 0000001b2e120000 RBX: 00007fed5f0e5720 RCX: 0000001b2e11fff8
RDX: 00000000003ffde8 RSI: 00000000003ffde8 RDI: 00007fed5f0e5700
RBP: ffffffff822fa197 R08: 00007fed5e5b6118 R09: 00007fed5e5a2000
R10: 00007fed5d5fd008 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffff822fa8fd R15: 0000000000000001
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffffffff8e3bf440 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff8e3bf440 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #0: ffffffff8e3bf440 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6764
3 locks held by syz-executor/5828:
 #0: ffff888078035e48 (vm_lock){++++}-{0:0}, at: do_user_addr_fault+0x452/0x1370 arch/x86/mm/fault.c:1328
 #1: ffff88814dfd4518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 #2: ffff88814dfd8950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444
5 locks held by kworker/u8:10/6304:
6 locks held by kworker/u8:12/6307:
 #0: ffff888021abc948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
 #1: ffffc9000b6ffd18 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
 #2: ffff88814dfd40e0 (&type->s_umount_key#31){++++}-{4:4}, at: super_trylock_shared+0x1e/0xf0 fs/super.c:562
 #3: ffff88814dfd6b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: do_writepages+0x1b2/0x820 mm/page-writeback.c:2656
 #4: ffff88814dfd8950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444
 #5: ffff888078428cb0 (&ei->i_data_sem){++++}-{4:4}, at: ext4_map_blocks+0x355/0x1390 fs/ext4/inode.c:705
2 locks held by getty/19556:
 #0: ffff88803372a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc90004d352f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
3 locks held by syz.8.5035/25291:
 #0: ffff88802ff72808 (vm_lock){++++}-{0:0}, at: do_user_addr_fault+0x452/0x1370 arch/x86/mm/fault.c:1328
 #1: ffff88814dfd4518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 #2: ffff88814dfd8950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444
3 locks held by syz.7.5040/25302:
 #0: ffff8880669db1c8 (vm_lock){++++}-{0:0}, at: do_user_addr_fault+0x452/0x1370 arch/x86/mm/fault.c:1328
 #1: ffff88814dfd4518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 #2: ffff88814dfd8950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444
3 locks held by syz.6.5042/25304:
 #0: ffff88807ba6a808 (vm_lock){++++}-{0:0}, at: do_user_addr_fault+0x452/0x1370 arch/x86/mm/fault.c:1328
 #1: ffff88814dfd4518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 #2: ffff88814dfd8950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444
3 locks held by syz.2.5043/25308:
 #0: ffff8880781701c8 (vm_lock){++++}-{0:0}, at: do_user_addr_fault+0x452/0x1370 arch/x86/mm/fault.c:1328
 #1: ffff88814dfd4518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 #2: ffff88814dfd8950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Tainted: G     U    I         6.15.0-rc3-syzkaller-00008-ga33b5a08cbbd #0 PREEMPT(full) 
Tainted: [U]=USER, [I]=FIRMWARE_WORKAROUND
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
 watchdog+0xf70/0x12c0 kernel/hung_task.c:437
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
 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: 16 Comm: rcu_preempt Tainted: G     U    I         6.15.0-rc3-syzkaller-00008-ga33b5a08cbbd #0 PREEMPT(full) 
Tainted: [U]=USER, [I]=FIRMWARE_WORKAROUND
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__switch_to_asm+0x18/0x70 arch/x86/entry/entry_64.S:195
Code: 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 53 41 54 41 55 41 56 41 57 48 89 a7 98 18 00 00 48 8b a6 98 18 00 00 <48> 8b 9e e0 05 00 00 65 48 89 1d 01 40 7a 12 49 c7 c4 10 00 00 00
RSP: 0018:ffffc90003fbfba0 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff888030dfbc00 RCX: ffffc9000015799c
RDX: 1ffff110170a73e2 RSI: ffff888030dfbc00 RDI: ffff88801d2f5a00
RBP: ffffc90000157b88 R08: 0000000000000001 R09: ffffed1003a5edf0
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888030dfc158 R14: ffff88801d2f5a00 R15: ffff8880b8539f00
FS:  0000000000000000(0000) GS:ffff888124abf000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005559e3876600 CR3: 000000000e180000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace: