INFO: task kworker/0:1:10 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1 state:D stack:22312 pid:10 tgid:10 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: xfs-sync/loop8 xfs_flush_inodes_worker
Call Trace:
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
wb_wait_for_completion+0x3b2/0x700 fs/fs-writeback.c:227
sync_inodes_sb+0x224/0xbf0 fs/fs-writeback.c:3030
xfs_flush_inodes_worker+0x61/0x80 fs/xfs/xfs_super.c:667
process_one_work kernel/workqueue.c:3322 [inline]
process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
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
INFO: task syz.8.2198:15426 blocked for more than 145 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.2198 state:D stack:21160 pid:15426 tgid:15425 ppid:9855 task_flags:0x400740 flags:0x00080002
Call Trace:
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+0xc0/0x2c0 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:100 [inline]
__wait_for_common kernel/sched/completion.c:121 [inline]
wait_for_common kernel/sched/completion.c:132 [inline]
wait_for_completion+0x2ca/0x5e0 kernel/sched/completion.c:153
__flush_work+0xa63/0xca0 kernel/workqueue.c:4374
xfs_file_buffered_write+0x276/0x870 fs/xfs/xfs_file.c:1079
__kernel_write_iter+0x44a/0x8f0 fs/read_write.c:621
dump_emit_page fs/coredump.c:1298 [inline]
dump_user_range+0xc19/0x12c0 fs/coredump.c:1372
elf_core_dump+0x3485/0x3a90 fs/binfmt_elf.c:2109
coredump_write+0x1290/0x1960 fs/coredump.c:1052
do_coredump fs/coredump.c:1131 [inline]
vfs_coredump+0x36ff/0x44c0 fs/coredump.c:1200
get_signal+0x1094/0x12c0 kernel/signal.c:3023
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x104/0x730 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb88bb5d68e
RSP: 002b:00007fb88ca40f68 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fb88ca416c0 RCX: 00007fb88bb5d68e
RDX: 0000000000002000 RSI: 0000200000006180 RDI: 000000000000000b
RBP: 00007fb88bc32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000b
R13: 00002000000004c0 R14: 00007fb88be15fa0 R15: 00007ffe74dfbf88
INFO: lockdep is turned off.
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 05/09/2026
Call Trace:
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
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9297 Comm: kworker/u8:29 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: writeback wb_workfn (flush-7:8)
RIP: 0010:memset+0xf/0x30 arch/x86/lib/memset_64.S:38
Code: 44 88 1f e9 8e f4 62 f5 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 49 89 f9 40 88 f0 48 89 d1 aa 4c 89 c8 e9 62 f4 62 f5 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000007a98 EFLAGS: 00000202
RAX: ffffffff87106600 RBX: ffff888078013238 RCX: 000000000000000f
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc90000007c01
RBP: ffffc90000007ca0 R08: ffffc90000007c0f R09: ffffc90000007c00
R10: dffffc0000000000 R11: fffff52000000f82 R12: dffffc0000000000
R13: ffff88805baa3220 R14: 1ffff1100f002647 R15: 1ffff92000000f70
FS: 0000000000000000(0000) GS:ffff88812525d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f532c4b4a10 CR3: 000000007f590000 CR4: 0000000000350ef0
Call Trace:
mac80211_hwsim_tx_frame_no_nl+0x829/0x1760 drivers/net/wireless/virtual/mac80211_hwsim_main.c:1955
mac80211_hwsim_tx_frame+0x199/0x1f0 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2406
mac80211_hwsim_beacon_tx+0x396/0x820 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2482
__iterate_interfaces+0x2af/0x5a0 net/mac80211/util.c:772
ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:808
mac80211_hwsim_beacon+0xaf/0x240 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2514
__run_hrtimer kernel/time/hrtimer.c:2032 [inline]
__hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2096
hrtimer_run_softirq+0x17a/0x240 kernel/time/hrtimer.c:2113
handle_softirqs+0x225/0x840 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2039 [inline]
RIP: 0010:vprintk_emit+0x45d/0x560 kernel/printk/printk.c:2478
Code: 0f 84 44 ff ff ff e8 22 6d 21 00 fb eb 44 e8 1a 6d 21 00 e8 e5 70 08 0a 4d 85 f6 74 94 e8 0b 6d 21 00 fb 48 c7 c7 e0 be 94 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 ab 1c
RSP: 0018:ffffc9000398dae0 EFLAGS: 00000293
RAX: ffffffff81a4b435 RBX: ffffffff81a4b2af RCX: ffff888034a9be00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e94bee0
RBP: ffffc9000398db90 R08: ffffffff903188f7 R09: 1ffffffff206311e
R10: dffffc0000000000 R11: fffffbfff206311f R12: 0000000000000000
R13: 000000000000004b R14: 0000000000000200 R15: 1ffff92000731b60
_printk+0xdd/0x130 kernel/printk/printk.c:2504
print_hex_dump+0x1d2/0x2b0 lib/hexdump.c:286
xfs_hex_dump+0x3d/0x50 fs/xfs/xfs_message.c:110
xfs_buf_verifier_error+0x1cc/0x2a0 fs/xfs/xfs_error.c:330
xfs_allocbt_read_verify+0x5f/0xe0 fs/xfs/libxfs/xfs_alloc_btree.c:-1
__xfs_buf_ioend+0x342/0x700 fs/xfs/xfs_buf.c:1098
xfs_buf_iowait+0x156/0x480 fs/xfs/xfs_buf.c:1307
_xfs_buf_read fs/xfs/xfs_buf.c:606 [inline]
xfs_buf_read_map+0x31f/0xa00 fs/xfs/xfs_buf.c:672
xfs_trans_read_buf_map+0x235/0x820 fs/xfs/xfs_trans_buf.c:273
xfs_trans_read_buf fs/xfs/xfs_trans.h:212 [inline]
xfs_btree_read_buf_block+0x2ae/0x4a0 fs/xfs/libxfs/xfs_btree.c:1402
xfs_btree_lookup_get_block+0x294/0x4f0 fs/xfs/libxfs/xfs_btree.c:1907
xfs_btree_lookup+0x43f/0x1320 fs/xfs/libxfs/xfs_btree.c:2018
xfs_alloc_lookup fs/xfs/libxfs/xfs_alloc.c:166 [inline]
xfs_alloc_lookup_eq fs/xfs/libxfs/xfs_alloc.c:184 [inline]
xfs_alloc_fixup_trees+0x219/0xd30 fs/xfs/libxfs/xfs_alloc.c:626
xfs_alloc_cur_finish+0xd5/0x4a0 fs/xfs/libxfs/xfs_alloc.c:1117
xfs_alloc_ag_vextent_near+0xdbc/0x12b0 fs/xfs/libxfs/xfs_alloc.c:1776
xfs_alloc_vextent_iterate_ags+0x651/0x960 fs/xfs/libxfs/xfs_alloc.c:3764
xfs_alloc_vextent_start_ag+0x373/0x850 fs/xfs/libxfs/xfs_alloc.c:3839
xfs_bmap_btalloc_best_length fs/xfs/libxfs/xfs_bmap.c:3617 [inline]
xfs_bmap_btalloc fs/xfs/libxfs/xfs_bmap.c:3661 [inline]
xfs_bmapi_allocate+0x18d1/0x2f20 fs/xfs/libxfs/xfs_bmap.c:3936
xfs_bmapi_convert_one_delalloc fs/xfs/libxfs/xfs_bmap.c:4445 [inline]
xfs_bmapi_convert_delalloc+0x879/0x1540 fs/xfs/libxfs/xfs_bmap.c:4501
xfs_map_blocks fs/xfs/xfs_aops.c:461 [inline]
xfs_writeback_range+0x6ab/0xf80 fs/xfs/xfs_aops.c:505
iomap_writeback_range fs/iomap/buffered-io.c:1862 [inline]
iomap_writeback_folio+0x14f1/0x2790 fs/iomap/buffered-io.c:1988
iomap_writepages+0x167/0x2e0 fs/iomap/buffered-io.c:2051
xfs_vm_writepages+0x2eb/0x3d0 fs/xfs/xfs_aops.c:719
do_writepages+0x338/0x560 mm/page-writeback.c:2571
__writeback_single_inode+0x12e/0xf90 fs/fs-writeback.c:1787
writeback_sb_inodes+0x9de/0x1b00 fs/fs-writeback.c:2079
wb_writeback+0x41c/0xad0 fs/fs-writeback.c:2264
wb_do_writeback fs/fs-writeback.c:2432 [inline]
wb_workfn+0x431/0x10f0 fs/fs-writeback.c:2477
process_one_work kernel/workqueue.c:3322 [inline]
process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
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