INFO: task jbd2/sda1-8:5157 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8 state:D stack:25832 pid:5157 tgid:5157 ppid:2 task_flags:0x240040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
io_schedule+0x8a/0xf0 kernel/sched/core.c:7835
bit_wait_io+0xd/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x65/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xdc/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
__wait_on_buffer+0x64/0x70 fs/buffer.c:124
wait_on_buffer include/linux/buffer_head.h:420 [inline]
jbd2_journal_commit_transaction+0x38e4/0x6900 fs/jbd2/commit.c:808
kjournald2+0x200/0x760 fs/jbd2/journal.c:201
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz-executor:5814 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22848 pid:5814 tgid:5814 ppid:5813 task_flags:0x440100 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
io_schedule+0x8a/0xf0 kernel/sched/core.c:7835
bit_wait_io+0xd/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x65/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xdc/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x880/0x1210 fs/jbd2/transaction.c:1092
jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1242
__ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x1b7/0x330 fs/ext4/inode.c:6238
__ext4_mark_inode_dirty+0x18f/0x8b0 fs/ext4/inode.c:6413
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6450
__mark_inode_dirty+0x1f3/0x1790 fs/fs-writeback.c:2609
generic_update_time fs/inode.c:2198 [inline]
file_update_time_flags+0x46b/0x500 fs/inode.c:2428
ext4_page_mkwrite+0x35b/0x1980 fs/ext4/inode.c:6616
do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
wp_page_shared mm/memory.c:3990 [inline]
do_wp_page+0x4aa/0x4f00 mm/memory.c:4209
handle_pte_fault mm/memory.c:6333 [inline]
__handle_mm_fault+0x1ac8/0x2b60 mm/memory.c:6455
handle_mm_fault+0x36d/0xa20 mm/memory.c:6624
do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
handle_page_fault arch/x86/mm/fault.c:1474 [inline]
exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7ff30a87ada7
RSP: 002b:00007ffe95ec9530 EFLAGS: 00010202
RAX: 00007ff309164000 RBX: 0000555589050570 RCX: 0000000000000005
RDX: 00000000000018d1 RSI: 000055558905ae68 RDI: 0000000000000020
RBP: 00007ffe95ec9a30 R08: 00000000000002bc R09: 000055558905ae68
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe95ec9870
R13: 00007ffe95ec9660 R14: 585858582e7a7973 R15: 00007ffe95ec95b0
INFO: task syz.3.2851:20456 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2851 state:D stack:25416 pid:20456 tgid:20456 ppid:15688 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
io_schedule+0x8a/0xf0 kernel/sched/core.c:7835
bit_wait_io+0xd/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x65/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xdc/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x880/0x1210 fs/jbd2/transaction.c:1092
jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1242
__ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x1b7/0x330 fs/ext4/inode.c:6238
__ext4_mark_inode_dirty+0x18f/0x8b0 fs/ext4/inode.c:6413
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6450
__mark_inode_dirty+0x1f3/0x1790 fs/fs-writeback.c:2609
generic_update_time fs/inode.c:2198 [inline]
file_update_time_flags+0x46b/0x500 fs/inode.c:2428
ext4_page_mkwrite+0x35b/0x1980 fs/ext4/inode.c:6616
do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
do_shared_fault mm/memory.c:5875 [inline]
do_fault+0x3d7/0x1990 mm/memory.c:5937
do_pte_missing mm/memory.c:4477 [inline]
handle_pte_fault mm/memory.c:6317 [inline]
__handle_mm_fault+0x180f/0x2b60 mm/memory.c:6455
handle_mm_fault+0x36d/0xa20 mm/memory.c:6624
do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
handle_page_fault arch/x86/mm/fault.c:1474 [inline]
exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f0fb8271632
RSP: 002b:00007ffd46894310 EFLAGS: 00010202
RAX: 0000000000088008 RBX: 00007f0fb9145720 RCX: 0000000000000000
RDX: 0000001b30d9c000 RSI: 0000000000000008 RDI: 00007f0fb9145720
RBP: 000000000000035f R08: 00007f0fb8600000 R09: 00007f0fb8616038
R10: 0000000000000001 R11: 0000000000000006 R12: ffffffff82808593
R13: 00007f0fb8616038 R14: 00000000000000f8 R15: fffffffffff78000
INFO: task syz.2.2858:20500 blocked for more than 144 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.2858 state:D stack:26536 pid:20500 tgid:20500 ppid:18190 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
io_schedule+0x8a/0xf0 kernel/sched/core.c:7835
bit_wait_io+0xd/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x65/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xdc/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x880/0x1210 fs/jbd2/transaction.c:1092
jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1242
__ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x1b7/0x330 fs/ext4/inode.c:6238
__ext4_mark_inode_dirty+0x18f/0x8b0 fs/ext4/inode.c:6413
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6450
__mark_inode_dirty+0x1f3/0x1790 fs/fs-writeback.c:2609
generic_update_time fs/inode.c:2198 [inline]
file_update_time_flags+0x46b/0x500 fs/inode.c:2428
ext4_page_mkwrite+0x35b/0x1980 fs/ext4/inode.c:6616
do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
do_shared_fault mm/memory.c:5875 [inline]
do_fault+0x3d7/0x1990 mm/memory.c:5937
do_pte_missing mm/memory.c:4477 [inline]
handle_pte_fault mm/memory.c:6317 [inline]
__handle_mm_fault+0x180f/0x2b60 mm/memory.c:6455
handle_mm_fault+0x36d/0xa20 mm/memory.c:6624
do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
handle_page_fault arch/x86/mm/fault.c:1474 [inline]
exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f73ace71632
RSP: 002b:00007ffd95aa88f0 EFLAGS: 00010202
RAX: 0000000000012008 RBX: 00007f73add45720 RCX: 0000000000000000
RDX: 0000001b2dc12000 RSI: 0000000000000008 RDI: 00007f73add45720
RBP: 00000000000001e7 R08: 00007f73ad200000 R09: 00007f73ad216128
R10: 0000000000000003 R11: 0000000000000009 R12: ffffffff84f2c6e4
R13: 00007f73ad216128 R14: 0000000000000044 R15: fffffffffffee000
INFO: task syz.1.2859:20504 blocked for more than 144 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2859 state:D stack:27432 pid:20504 tgid:20504 ppid:19156 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
io_schedule+0x8a/0xf0 kernel/sched/core.c:7835
bit_wait_io+0xd/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x65/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xdc/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x880/0x1210 fs/jbd2/transaction.c:1092
jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1242
__ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x1b7/0x330 fs/ext4/inode.c:6238
__ext4_mark_inode_dirty+0x18f/0x8b0 fs/ext4/inode.c:6413
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6450
__mark_inode_dirty+0x1f3/0x1790 fs/fs-writeback.c:2609
generic_update_time fs/inode.c:2198 [inline]
file_update_time_flags+0x46b/0x500 fs/inode.c:2428
ext4_page_mkwrite+0x35b/0x1980 fs/ext4/inode.c:6616
do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
do_shared_fault mm/memory.c:5875 [inline]
do_fault+0x3d7/0x1990 mm/memory.c:5937
do_pte_missing mm/memory.c:4477 [inline]
handle_pte_fault mm/memory.c:6317 [inline]
__handle_mm_fault+0x180f/0x2b60 mm/memory.c:6455
handle_mm_fault+0x36d/0xa20 mm/memory.c:6624
do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
handle_page_fault arch/x86/mm/fault.c:1474 [inline]
exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f69bee70ec0
RSP: 002b:00007fff043c3480 EFLAGS: 00010202
RAX: 0000001b31f1f000 RBX: ffffffff8954e478 RCX: 0000001b31f1eff8
RDX: 0000001b31b24220 RSI: 0000000000000008 RDI: 00007f69bfd45720
RBP: 0000000000000115 R08: 00007f69bf200000 R09: 00007f69bf202000
R10: 000000008954e47c R11: 0000000000000004 R12: 00007f69bf216038
R13: 0000000000000169 R14: ffffffff8954e404 R15: 00007f69bfd45720
INFO: task syz.4.2860:20507 blocked for more than 144 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.2860 state:D stack:28440 pid:20507 tgid:20507 ppid:10024 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7008
io_schedule+0x8a/0xf0 kernel/sched/core.c:7835
bit_wait_io+0xd/0xe0 kernel/sched/wait_bit.c:250
__wait_on_bit+0x65/0x180 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0xdc/0x110 kernel/sched/wait_bit.c:67
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
do_get_write_access+0x880/0x1210 fs/jbd2/transaction.c:1092
jbd2_journal_get_write_access+0x1d6/0x280 fs/jbd2/transaction.c:1242
__ext4_journal_get_write_access+0x6a/0x340 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x1b7/0x330 fs/ext4/inode.c:6238
__ext4_mark_inode_dirty+0x18f/0x8b0 fs/ext4/inode.c:6413
ext4_dirty_inode+0xd9/0x130 fs/ext4/inode.c:6450
__mark_inode_dirty+0x1f3/0x1790 fs/fs-writeback.c:2609
generic_update_time fs/inode.c:2198 [inline]
file_update_time_flags+0x46b/0x500 fs/inode.c:2428
ext4_page_mkwrite+0x35b/0x1980 fs/ext4/inode.c:6616
do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
do_shared_fault mm/memory.c:5875 [inline]
do_fault+0x3d7/0x1990 mm/memory.c:5937
do_pte_missing mm/memory.c:4477 [inline]
handle_pte_fault mm/memory.c:6317 [inline]
__handle_mm_fault+0x180f/0x2b60 mm/memory.c:6455
handle_mm_fault+0x36d/0xa20 mm/memory.c:6624
do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
handle_page_fault arch/x86/mm/fault.c:1474 [inline]
exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f31c2c6a243
RSP: 002b:00007fffbe5b4f40 EFLAGS: 00010246
RAX: 00000000003ffde8 RBX: 0000000000000000 RCX: 0000001b2e764000
RDX: 0000001b2e724000 RSI: 0000000000400000 RDI: 00007f31c2fda710
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007fffbe5b51d0
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e7e74e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8e7e74e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8e7e74e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775
3 locks held by syz-executor/5814:
#0: ffff8880780e7808 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x11d/0x590 mm/mmap_lock.c:310
#1: ffff888036f92518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
#2: ffff888036db6950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfaa/0x13a0 fs/jbd2/transaction.c:444
7 locks held by kworker/u10:7/10184:
#0: ffff8880b843b2e0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:655 [inline]
#0: ffff8880b843b2e0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x88/0x140 kernel/sched/core.c:639
#1: ffff88807e0ce008 (&____s->seqcount#14){--.-}-{0:0}, at: trace_find_filtered_pid kernel/trace/trace_pid.c:15 [inline]
#1: ffff88807e0ce008 (&____s->seqcount#14){--.-}-{0:0}, at: trace_ignore_this_task+0xbc/0x100 kernel/trace/trace_pid.c:44
#2: ffff8880b843b2e0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:655 [inline]
#2: ffff8880b843b2e0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x88/0x140 kernel/sched/core.c:639
#3: ffffffff9b3f7ab8 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x144/0x490 lib/debugobjects.c:835
#4: ffffffff8e7e74e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#4: ffffffff8e7e74e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#4: ffffffff8e7e74e0 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1193 [inline]
#4: ffffffff8e7e74e0 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0xbd/0x1ea0 arch/x86/kernel/unwind_orc.c:495
#5: ffff8880b843f6a8 ((local_lock_t *)&pcs->lock){+.+.}-{3:3}, at: local_trylock_acquire include/linux/local_lock_internal.h:53 [inline]
#5: ffff8880b843f6a8 ((local_lock_t *)&pcs->lock){+.+.}-{3:3}, at: __kfree_rcu_sheaf+0x86/0x720 mm/slub.c:5872
#6: ffff8880269b18d8 (&____s->seqcount#7){----}-{0:0}, at: drm_handle_vblank_events drivers/gpu/drm/drm_vblank.c:1886 [inline]
#6: ffff8880269b18d8 (&____s->seqcount#7){----}-{0:0}, at: drm_handle_vblank+0x284/0xc30 drivers/gpu/drm/drm_vblank.c:1960
2 locks held by getty/14552:
#0: ffff88803763a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000459b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x1500 drivers/tty/n_tty.c:2211
3 locks held by syz.3.2851/20456:
#0: ffff8880299cd448 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x11d/0x590 mm/mmap_lock.c:310
#1: ffff888036f92518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
#2: ffff888036db6950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfaa/0x13a0 fs/jbd2/transaction.c:444
3 locks held by syz.2.2858/20500:
#0: ffff88807c0ddbc8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x11d/0x590 mm/mmap_lock.c:310
#1: ffff888036f92518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
#2: ffff888036db6950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfaa/0x13a0 fs/jbd2/transaction.c:444
3 locks held by syz.1.2859/20504:
#0: ffff88807f540808 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x11d/0x590 mm/mmap_lock.c:310
#1: ffff888036f92518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
#2: ffff888036db6950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfaa/0x13a0 fs/jbd2/transaction.c:444
3 locks held by syz.4.2860/20507:
#0: ffff88805f544588 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x11d/0x590 mm/mmap_lock.c:310
#1: ffff888036f92518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x17a/0x440 mm/memory.c:3589
#2: ffff888036db6950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfaa/0x13a0 fs/jbd2/transaction.c:444
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x1d7/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x141/0x190 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xd25/0x1050 kernel/hung_task.c:515
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: 78 85 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 43 10 1e 00 fb f4 fc 35 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffffff8e407e00 EFLAGS: 00000246
RAX: 0000000000a42765 RBX: ffffffff8e4975c0 RCX: ffffffff8b8d7c75
RDX: 0000000000000000 RSI: ffffffff8de7fbba RDI: ffffffff8c1b09a0
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1017086795
R10: ffff8880b8433cab R11: 0000000000000000 R12: fffffbfff1c92eb8
R13: 0000000000000000 R14: ffffffff90d9c010 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88812434a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005562fc35f168 CR3: 000000000e598000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:73 [inline]
default_idle+0x9/0x10 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:191 [inline]
do_idle+0x43a/0x550 kernel/sched/idle.c:341
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:439
rest_init+0x251/0x260 init/main.c:760
start_kernel+0x47f/0x480 init/main.c:1210
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148