INFO: task kworker/0:5:5914 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/0:5 state:D stack:25464 pid:5914 tgid:5914 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: gfs2_recovery gfs2_recover_func
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0x1585/0x5340 kernel/sched/core.c:6907
__schedule_loop kernel/sched/core.c:6989 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7004
io_schedule+0x7f/0xd0 kernel/sched/core.c:7831
folio_wait_bit_common+0x6d8/0xbc0 mm/filemap.c:1323
folio_wait_locked include/linux/pagemap.h:1245 [inline]
gfs2_jhead_process_page+0x175/0x670 fs/gfs2/lops.c:470
gfs2_find_jhead+0xbd2/0xd30 fs/gfs2/lops.c:586
gfs2_recover_func+0x6cf/0x1f60 fs/gfs2/recovery.c:459
process_one_work+0x949/0x1650 kernel/workqueue.c:3279
process_scheduled_works kernel/workqueue.c:3362 [inline]
worker_thread+0xb46/0x1140 kernel/workqueue.c:3443
kthread+0x388/0x470 kernel/kthread.c:467
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz.4.39:6100 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.4.39 state:D stack:25056 pid:6100 tgid:6095 ppid:5824 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0x1585/0x5340 kernel/sched/core.c:6907
__schedule_loop kernel/sched/core.c:6989 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7004
bit_wait+0x11/0xd0 kernel/sched/wait_bit.c:240
__wait_on_bit+0xb9/0x310 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit include/linux/wait_bit.h:77 [inline]
gfs2_recover_journal+0xda/0x140 fs/gfs2/recovery.c:579
init_journal+0x16ad/0x22b0 fs/gfs2/ops_fstype.c:794
init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:844
gfs2_fill_super+0x1a38/0x21d0 fs/gfs2/ops_fstype.c:1250
get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694
gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1332
vfs_get_tree+0x92/0x2a0 fs/super.c:1754
fc_mount fs/namespace.c:1193 [inline]
do_new_mount_fc fs/namespace.c:3762 [inline]
do_new_mount+0x341/0xd30 fs/namespace.c:3838
do_mount fs/namespace.c:4161 [inline]
__do_sys_mount fs/namespace.c:4350 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4327
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb15f99d20a
RSP: 002b:00007fb1607bbe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fb1607bbee0 RCX: 00007fb15f99d20a
RDX: 0000200000037f40 RSI: 00002000000001c0 RDI: 00007fb1607bbea0
RBP: 0000200000037f40 R08: 00007fb1607bbee0 R09: 0000000000008000
R10: 0000000000008000 R11: 0000000000000246 R12: 00002000000001c0
R13: 00007fb1607bbea0 R14: 0000000000038003 R15: 0000200000000700
Showing all locks held in the system:
5 locks held by kworker/0:0/9:
1 lock held by khungtaskd/31:
#0: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8e7602e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:6/499:
#0: ffff8880b863ade0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb6/0x150 kernel/sched/core.c:655
#1: ffff8880b8724588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880 kernel/sched/psi.c:933
3 locks held by kworker/u8:8/5063:
#0: ffff88803208b148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x855/0x1650 kernel/workqueue.c:3254
#1: ffff8880b8724588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880 kernel/sched/psi.c:933
#2: ffff8880b8726118 (&base->lock){-.-.}-{2:2}, at: lock_timer_base kernel/time/timer.c:1004 [inline]
#2: ffff8880b8726118 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x1ae/0xf30 kernel/time/timer.c:1085
2 locks held by getty/5583:
#0: ffff8880370980a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000331e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0 drivers/tty/n_tty.c:2211
2 locks held by kworker/1:3/5870:
1 lock held by udevd/5875:
3 locks held by kworker/0:4/5905:
#0: ffff88801b06b548 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x855/0x1650 kernel/workqueue.c:3254
#1: ffffc900044d7c40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650 kernel/workqueue.c:3255
#2: ffff888053b4a240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x202/0x3d0 drivers/net/netdevsim/fib.c:1490
2 locks held by kworker/0:5/5914:
#0: ffff88801e7b5148 ((wq_completion)gfs2_recovery){+.+.}-{0:0}, at: process_one_work+0x855/0x1650 kernel/workqueue.c:3254
#1: ffffc90004587c40 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650 kernel/workqueue.c:3255
1 lock held by syz.4.39/6100:
#0: ffff8880532bc0e0 (&type->s_umount_key#64/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xab0 fs/super.c:345
3 locks held by syz-executor/8312:
#0: ffffffff8fbcd588 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#0: ffffffff8fbcd588 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#0: ffffffff8fbcd588 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8a1/0x1be0 net/core/rtnetlink.c:4071
#1: ffff888067339528 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_open+0x227/0x420 drivers/net/wireguard/device.c:50
#2: ffffffff8e766578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
#2: ffffffff8e766578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770 kernel/rcu/tree_exp.h:961
1 lock held by syz.5.536/8581:
#0: ffffffff8e766440 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x580 kernel/rcu/tree.c:3828
3 locks held by dhcpcd-run-hook/8596:
=============================================
NMI backtrace for cpu 0
CPU: 0 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_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:161 [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:346 [inline]
watchdog+0xfd9/0x1030 kernel/hung_task.c:515
kthread+0x388/0x470 kernel/kthread.c:467
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8597 Comm: rm 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:__kfree_rcu_sheaf+0x1f/0x5d0 mm/slub.c:5829
Code: 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 55 41 57 41 56 41 55 41 54 53 48 83 ec 10 49 89 f7 49 89 fe 48 8d 1d 00 00 00 00 <48> c7 c7 f0 aa 88 8e 31 f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00
RSP: 0018:ffffc9001f55eaa8 EFLAGS: 00000282
RAX: ffffea0001f90000 RBX: ffffffff82240d3f RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88807e401000 RDI: ffff88801b05dc80
RBP: ffffc9001f55f0d0 R08: 00007fa02505afff R09: 00007fa025058fff
R10: 00007fa025050fff R11: 00007fa02504dfff R12: dffffc0000000000
R13: ffffc9001f55f1a0 R14: ffff88801b05dc80 R15: ffff88807e401000
FS: 0000000000000000(0000) GS:ffff888125560000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa02505aeb8 CR3: 0000000074486000 CR4: 00000000003526f0
Call Trace:
kfree_rcu_sheaf mm/slab_common.c:1608 [inline]
kvfree_call_rcu+0x9e/0x430 mm/slab_common.c:1957
ma_free_rcu lib/maple_tree.c:208 [inline]
mas_free lib/maple_tree.c:1174 [inline]
mas_replace_node lib/maple_tree.c:1581 [inline]
mas_wr_node_store lib/maple_tree.c:3553 [inline]
mas_wr_store_entry+0x197d/0x2860 lib/maple_tree.c:3764
mas_store_prealloc+0xb18/0x1080 lib/maple_tree.c:5169
vma_iter_store_new mm/vma.h:614 [inline]
vma_complete+0x21f/0x9e0 mm/vma.c:356
__split_vma+0x8ed/0xa40 mm/vma.c:566
vms_gather_munmap_vmas+0x32d/0x1370 mm/vma.c:1408
__mmap_setup mm/vma.c:2411 [inline]
__mmap_region mm/vma.c:2741 [inline]
mmap_region+0x85b/0x2240 mm/vma.c:2837
do_mmap+0xc39/0x10c0 mm/mmap.c:559
vm_mmap_pgoff+0x2c9/0x4f0 mm/util.c:581
ksys_mmap_pgoff+0x51e/0x760 mm/mmap.c:605
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa025345242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007ffd270674d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fa02504a000 RCX: 00007fa025345242
RDX: 0000000000000003 RSI: 0000000000002000 RDI: 00007fa02504a000
RBP: 0000000000000812 R08: 0000000000000003 R09: 000000000002c000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffd27067598
R13: 00007fa02531aab0 R14: 00007ffd27067950 R15: 00000fffa4e0ce9e