INFO: task jbd2/sda1-8:5173 blocked for more than 143 seconds.
      Tainted: G     U              6.15.0-rc3-syzkaller-00076-ge72e9e693307 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8     state:D stack:25816 pid:5173  tgid:5173  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:5827 blocked for more than 143 seconds.
      Tainted: G     U              6.15.0-rc3-syzkaller-00076-ge72e9e693307 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:23112 pid:5827  tgid:5827  ppid:5825   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
 wp_page_shared mm/memory.c:3688 [inline]
 do_wp_page+0xb9e/0x58e0 mm/memory.c:3907
 handle_pte_fault mm/memory.c:6013 [inline]
 __handle_mm_fault+0x1ada/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: 0033:0x7f7df0677dcf
RSP: 002b:00007ffeda039fd0 EFLAGS: 00010202
RAX: 00007f7deef58000 RBX: 000055556682fe10 RCX: 0000000000000001
RDX: 1ffffffff128b781 RSI: 0000555566833f78 RDI: 0000000000000002
RBP: 00007ffeda03a2c0 R08: 0000555566833f78 R09: 00000000000016f0
R10: 0000000000000001 R11: 00007ffeda03a4d0 R12: 00007ffeda03a320
R13: 0000000000000004 R14: 00007ffeda03a040 R15: 00007ffeda03a110
 </TASK>
INFO: task kworker/u8:27:12713 blocked for more than 144 seconds.
      Tainted: G     U              6.15.0-rc3-syzkaller-00076-ge72e9e693307 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:27   state:D stack:23512 pid:12713 tgid:12713 ppid:2      task_flags:0x4248060 flags:0x00004000
Workqueue: writeback wb_workfn (flush-8:0)
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_ext_dirty+0x1ae/0x230 fs/ext4/extents.c:207
 ext4_ext_insert_extent+0x19bb/0x4610 fs/ext4/extents.c:2190
 ext4_ext_map_blocks+0x205b/0x5d60 fs/ext4/extents.c:4400
 ext4_map_create_blocks fs/ext4/inode.c:520 [inline]
 ext4_map_blocks+0x45b/0x1390 fs/ext4/inode.c:706
 mpage_map_one_extent fs/ext4/inode.c:2224 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2277 [inline]
 ext4_do_writepages+0x1a2c/0x3490 fs/ext4/inode.c:2739
 ext4_writepages+0x37a/0x7d0 fs/ext4/inode.c:2829
 do_writepages+0x1b2/0x820 mm/page-writeback.c:2656
 __writeback_single_inode+0x160/0xfb0 fs/fs-writeback.c:1680
 writeback_sb_inodes+0x601/0xf90 fs/fs-writeback.c:1976
 __writeback_inodes_wb+0xf8/0x2d0 fs/fs-writeback.c:2047
 wb_writeback+0x7f3/0xb70 fs/fs-writeback.c:2158
 wb_check_old_data_flush fs/fs-writeback.c:2262 [inline]
 wb_do_writeback fs/fs-writeback.c:2315 [inline]
 wb_workfn+0x8ca/0xbe0 fs/fs-writeback.c:2343
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 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.3.1879:14104 blocked for more than 144 seconds.
      Tainted: G     U              6.15.0-rc3-syzkaller-00076-ge72e9e693307 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1879      state:D stack:26488 pid:14104 tgid:14104 ppid:5839   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: 0033:0x7f13de26eada
RSP: 002b:00007fff8391c760 EFLAGS: 00010202
RAX: 0000001b30c16000 RBX: 00007f13df0e5720 RCX: 0000001b30c15ff8
RDX: 0000001b30820220 RSI: 0000000000000008 RDI: 00007f13df0e5720
RBP: ffffffff82091f6a R08: 00007f13de5b6038 R09: 00007f13de5a2000
R10: 00007f13dd9ff008 R11: 0000000000000003 R12: 0000000000000003
R13: 0000000000000030 R14: ffffffff82091984 R15: 0000000000000030
 </TASK>
INFO: task syz.0.1880:14107 blocked for more than 145 seconds.
      Tainted: G     U              6.15.0-rc3-syzkaller-00076-ge72e9e693307 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.1880      state:D stack:28168 pid:14107 tgid:14107 ppid:5838   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: 0033:0x7fc83be6eada
RSP: 002b:00007fff2b79d960 EFLAGS: 00010202
RAX: 0000001b30920000 RBX: 00007fc83cce5720 RCX: 0000001b3091fff8
RDX: 00000000003ffde8 RSI: 00000000003ffde8 RDI: 00007fc83cce5700
RBP: ffffffff893c10fb R08: 00007fc83c1b6038 R09: 00007fc83c1a2000
R10: 00007fc83b5ff008 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffffffff893c1991 R15: 0000000000000001
 </TASK>
INFO: task syz.1.1881:14108 blocked for more than 145 seconds.
      Tainted: G     U              6.15.0-rc3-syzkaller-00076-ge72e9e693307 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1881      state:D stack:27464 pid:14108 tgid:14108 ppid:5840   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: 0033:0x7fe19ba6547b
RSP: 002b:00007ffdebd29bc0 EFLAGS: 00010246
RAX: 00000000005ffde8 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000001b30620000 RSI: 0000000000600000 RDI: 00007fe19bc98d50
RBP: 0000000000000000 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 00000000000927c0 R14: 0000000000095771 R15: 00007ffdebd29e70
 </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
1 lock held by klogd/5200:
 #0: ffff8880b8439f18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:605
3 locks held by syz-executor/5827:
 #0: ffff888030e39588 (vm_lock){++++}-{0:0}, at: do_user_addr_fault+0x452/0x1370 arch/x86/mm/fault.c:1328
 #1: ffff888034d24518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 #2: ffff888034788950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444
6 locks held by kworker/u8:27/12713:
 #0: ffff888021acc148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
 #1: ffffc90003db7d18 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
 #2: ffff888034d240e0 (&type->s_umount_key#31){++++}-{4:4}, at: super_trylock_shared+0x1e/0xf0 fs/super.c:562
 #3: ffff888034d26b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: do_writepages+0x1b2/0x820 mm/page-writeback.c:2656
 #4: ffff888034788950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444
 #5: ffff888079d6dbf0 (&ei->i_data_sem){++++}-{4:4}, at: ext4_map_blocks+0x355/0x1390 fs/ext4/inode.c:705
2 locks held by getty/13617:
 #0: ffff88814db660a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc90004bab2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
3 locks held by syz.3.1879/14104:
 #0: ffff88807ef391c8 (vm_lock){++++}-{0:0}, at: do_user_addr_fault+0x452/0x1370 arch/x86/mm/fault.c:1328
 #1: ffff888034d24518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 #2: ffff888034788950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444
3 locks held by syz.0.1880/14107:
 #0: ffff88803cfd7948 (vm_lock){++++}-{0:0}, at: do_user_addr_fault+0x452/0x1370 arch/x86/mm/fault.c:1328
 #1: ffff888034d24518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 #2: ffff888034788950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444
3 locks held by syz.1.1881/14108:
 #0: ffff88805fa1d1c8 (vm_lock){++++}-{0:0}, at: do_user_addr_fault+0x452/0x1370 arch/x86/mm/fault.c:1328
 #1: ffff888034d24518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x171/0x380 mm/memory.c:3287
 #2: ffff888034788950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x5e4/0x1410 fs/jbd2/transaction.c:444

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Tainted: G     U              6.15.0-rc3-syzkaller-00076-ge72e9e693307 #0 PREEMPT(full) 
Tainted: [U]=USER
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 36 Comm: kworker/u8:2 Tainted: G     U              6.15.0-rc3-syzkaller-00076-ge72e9e693307 #0 PREEMPT(full) 
Tainted: [U]=USER
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0xd/0xc0 kernel/rcu/tree.c:736
Code: 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 53 65 ff 05 e3 9d 05 12 <e8> 0e aa ce 09 48 c7 c3 e8 3d a7 93 89 c5 83 f8 07 0f 87 82 00 00
RSP: 0018:ffffc90000ad7a68 EFLAGS: 00000083
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81c26c1f
RDX: fffffbfff210cd23 RSI: 0000000000000008 RDI: ffffffff90866910
RBP: ffffffff8b3c76e4 R08: 0000000000000000 R09: fffffbfff210cd22
R10: ffffffff90866917 R11: 0000000000000000 R12: ffffffff8b3c78c0
R13: ffff88801235dd40 R14: ffff888061890d80 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881249bf000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e2f283abc8 CR3: 000000000e180000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 trace_irq_enable.constprop.0+0xd4/0x120 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x26/0x40 kernel/trace/trace_preemptirq.c:73
 __local_bh_enable_ip+0xa4/0x120 kernel/softirq.c:412
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 batadv_nc_purge_paths+0x1d4/0x3a0 net/batman-adv/network-coding.c:471
 batadv_nc_worker+0x958/0x1030 net/batman-adv/network-coding.c:722
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 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>