INFO: task syz.8.715:18481 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.715 state:D stack:25416 pid:18481 tgid:18480 ppid:17803 task_flags:0x400140 flags:0x00080002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x171d/0x56e0 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
jfs_flush_journal+0x719/0xf50 fs/jfs/jfs_logmgr.c:1561
jfs_sync_fs+0x7d/0xa0 fs/jfs/super.c:650
sync_filesystem+0x1d1/0x250 fs/sync.c:66
jfs_reconfigure+0xc6/0x990 fs/jfs/super.c:370
reconfigure_super+0x232/0x8f0 fs/super.c:1128
vfs_cmd_reconfigure fs/fsopen.c:271 [inline]
vfs_fsconfig_locked+0x171/0x320 fs/fsopen.c:300
__do_sys_fsconfig fs/fsopen.c:466 [inline]
__se_sys_fsconfig+0x6bf/0x810 fs/fsopen.c:353
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd26f83f559
RSP: 002b:00007fd26da8e028 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007fd26fac5fa0 RCX: 00007fd26f83f559
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000005
RBP: 00007fd26f8d6b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd26fac6038 R14: 00007fd26fac5fa0 R15: 00007ffcbc709ec8
</TASK>
Showing all locks held in the system:
locks held by khungtaskd/39: 1, last CPU#0:
#0: ffffffff8f3c1680 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffffffff8f3c1680 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8f3c1680 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6871
locks held by kworker/u8:4/71: 6, on CPU#0:
#0: ffff88801c288940 ((wq_completion)netns){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffff88801c288940 ((wq_completion)netns){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffff88801c288940 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#0: ffff88801c288940 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
#1: ffffc9000156fc40 (net_cleanup_work){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffc9000156fc40 (net_cleanup_work){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffc9000156fc40 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#1: ffffc9000156fc40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
#2: ffffffff907f7720 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf5/0x810 net/core/net_namespace.c:677
#3: ffffffff908063d8 (rtnl_mutex){+.+.}-{4:4}, at: wiphy_unregister+0x26f/0xb30 net/wireless/core.c:1378
#4: ffffffff90a4c398 (cfg80211_mutex){+.+.}-{4:4}, at: wiphy_unregister+0x27d/0xb30 net/wireless/core.c:1379
#5: ffff88806afd0938 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: wiphy_lock include/net/cfg80211.h:6974 [inline]
#5: ffff88806afd0938 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: wiphy_unregister+0x287/0xb30 net/wireless/core.c:1380
locks held by kworker/u8:13/1477: 3, on CPU#1:
#0: ffff88801cf85940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffff88801cf85940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffff88801cf85940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#0: ffff88801cf85940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
#1: ffffc900071dfc40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffc900071dfc40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffc900071dfc40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#1: ffffc900071dfc40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
#2: ffffffff908063d8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:134 [inline]
#2: ffffffff908063d8 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x123/0x16e0 net/ipv6/addrconf.c:4255
locks held by getty/5358: 2, on CPU#0:
#0: ffff88802ac100a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900044be2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 drivers/tty/n_tty.c:2211
locks held by kworker/0:7/5882: 3, on CPU#0:
#0: ffff88813ff3b540 ((wq_completion)events){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffff88813ff3b540 ((wq_completion)events){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffff88813ff3b540 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#0: ffff88813ff3b540 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
#1: ffffc900068dfc40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffc900068dfc40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffc900068dfc40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#1: ffffc900068dfc40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
#2: ffff888069f68288 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x22d/0x3f0 drivers/net/netdevsim/fib.c:1490
locks held by syz.8.715/18481: 2, on CPU#0:
#0: ffff888028841060 (&fc->uapi_mutex){+.+.}-{4:4}, at: __do_sys_fsconfig fs/fsopen.c:464 [inline]
#0: ffff888028841060 (&fc->uapi_mutex){+.+.}-{4:4}, at: __se_sys_fsconfig+0x693/0x810 fs/fsopen.c:353
#1: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: vfs_cmd_reconfigure fs/fsopen.c:270 [inline]
#1: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: vfs_fsconfig_locked+0x169/0x320 fs/fsopen.c:300
locks held by syz-executor/20105: 1, on CPU#0:
#0: ffffffff908063d8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:134 [inline]
#0: ffffffff908063d8 (rtnl_mutex){+.+.}-{4:4}, at: inet6_rtm_newaddr+0x669/0xe10 net/ipv6/addrconf.c:5088
locks held by kworker/0:9/20140: 3, on CPU#0:
#0: ffff88813ff3b540 ((wq_completion)events){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffff88813ff3b540 ((wq_completion)events){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffff88813ff3b540 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#0: ffff88813ff3b540 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
#1: ffffc90005767c40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffc90005767c40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffc90005767c40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#1: ffffc90005767c40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
#2: ffff88802d300288 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x22d/0x3f0 drivers/net/netdevsim/fib.c:1490
locks held by syz-executor/20162: 1, on CPU#0:
#0: ffffffff908063d8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:134 [inline]
#0: ffffffff908063d8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x470/0x19f0 net/ipv4/devinet.c:968
locks held by syz.8.972/20335: 1, on CPU#1:
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:62 [inline]
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: super_lock+0x2d1/0x3d0 fs/super.c:124
locks held by syz.8.972/20336: 1, on CPU#1:
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:62 [inline]
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: super_lock+0x2d1/0x3d0 fs/super.c:124
locks held by syz.8.972/20337: 1, on CPU#0:
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:62 [inline]
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: super_lock+0x2d1/0x3d0 fs/super.c:124
locks held by syz.8.972/20338: 1, on CPU#1:
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:62 [inline]
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: super_lock+0x2d1/0x3d0 fs/super.c:124
locks held by syz.8.972/20339: 1, on CPU#0:
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:62 [inline]
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: super_lock+0x2d1/0x3d0 fs/super.c:124
locks held by syz.8.972/20340: 1, on CPU#1:
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:62 [inline]
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: super_lock+0x2d1/0x3d0 fs/super.c:124
locks held by syz.8.972/20341: 1, on CPU#0:
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:62 [inline]
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: super_lock+0x2d1/0x3d0 fs/super.c:124
locks held by syz.8.972/20342: 1, on CPU#0:
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:62 [inline]
#0: ffff88803bd440e0 (&type->s_umount_key#84){++++}-{4:4}, at: super_lock+0x2d1/0x3d0 fs/super.c:124
locks held by syz-executor/20344: 2, on CPU#1:
#0: ffffffff90d4f268 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffffffff90d4f268 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff90d4f268 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:598
#1: ffffffff908063d8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#1: ffffffff908063d8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:366 [inline]
#1: ffffffff908063d8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xc1d/0x1c30 net/core/rtnetlink.c:4251
locks held by syz.5.973/20383: 2, last CPU#1:
#0: ffff888069cf5948 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:309
#1: ffffffff8f3c1680 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff8f3c1680 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8f3c1680 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
#1: ffffffff8f3c1680 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0x8f/0x2550 arch/x86/kernel/unwind_orc.c:495
locks held by rm/20384: 2, last CPU#1:
#0: ffff888059d6c4b8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:548 [inline]
#0: ffff888059d6c4b8 (&mm->mmap_lock){++++}-{4:4}, at: map_vdso+0x69/0x6a0 arch/x86/entry/vdso/vma.c:162
#1: ffffffff8f3c1680 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff8f3c1680 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8f3c1680 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
#1: ffffffff8f3c1680 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0x8f/0x2550 arch/x86/kernel/unwind_orc.c:495
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 39 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
<TASK>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:123
nmi_trigger_cpumask_backtrace+0x17d/0x390 lib/nmi_backtrace.c:66
trigger_all_cpu_backtrace include/linux/nmi.h:164 [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+0xfd2/0x1030 kernel/hung_task.c:561
kthread+0x38b/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
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 20383 Comm: syz.5.973 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:179 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:242 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x2f/0xb0 kernel/kcov.c:317
Code: 8b 04 24 65 48 8b 0d 98 e3 06 12 65 48 8b 15 98 e3 06 12 41 89 d1 41 81 e1 00 00 00 ff 41 b8 00 01 00 00 44 23 81 fc 0b 00 00 <45> 09 c1 74 1e 45 85 c0 74 67 81 fa ff ff ff 0f 77 5f 81 e2 00 00
RSP: 0000:ffffc90005257750 EFLAGS: 00000246
RAX: ffffffff821394d3 RBX: ffff88805cdff980 RCX: ffff88803902be80
RDX: 8000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000276339 R12: dffffc0000000000
R13: ffff8880419b5d00 R14: ffffea00013b19c0 R15: ffffea00013b19f0
FS: 00007f16b59c66c0(0000) GS:ffff888124834000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f16ad686000 CR3: 000000004f174000 CR4: 00000000003526f0
Call Trace:
<TASK>
folio_objcg include/linux/memcontrol.h:418 [inline]
folio_memcg include/linux/memcontrol.h:453 [inline]
folio_matches_lruvec+0x113/0x270 include/linux/memcontrol.h:1577
lruvec_add_folio include/linux/mm_inline.h:440 [inline]
lru_add+0x6cb/0xda0 mm/folio.c:148
folio_batch_move_lru+0x4c7/0x820 mm/folio.c:194
__folio_batch_add_and_move+0x44c/0xaa0 mm/folio.c:225
folio_add_lru_vma+0x196/0x210 mm/folio.c:511
map_anon_folio_pte_nopf+0x2ee/0x5e0 mm/memory.c:5378
map_anon_folio_pte_pf+0xbe/0x220 mm/memory.c:5388
do_anonymous_page mm/memory.c:5491 [inline]
do_pte_missing+0x27c4/0x28f0 mm/memory.c:4664
handle_pte_fault mm/memory.c:6530 [inline]
__handle_mm_fault mm/memory.c:6679 [inline]
handle_mm_fault+0xf64/0x28c0 mm/memory.c:6846
do_user_addr_fault+0xb35/0x1480 arch/x86/mm/fault.c:1343
handle_page_fault arch/x86/mm/fault.c:1483 [inline]
exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7f16b7626358
Code: 85 ed 74 3b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 47 0f b6 0c 08 45 84 c9 74 08 <45> 88 0c 00 49 8b 47 10 48 83 c0 01 49 89 47 10 83 e9 01 73 d3 41
RSP: 002b:00007f16b59c5470 EFLAGS: 00010282
RAX: 00000000000e0000 RBX: 00007f16b59c5530 RCX: 0000000000000016
RDX: 000000000000007f RSI: 0000000000000200 RDI: 00007f16b59c55d0
RBP: 00000000000000e8 R08: 00007f16ad5a6000 R09: 00000000000000fe
R10: 0000000000000000 R11: 00007f16b59c5540 R12: 0000000000000181
R13: 00007f16b78271e0 R14: 0000000000000011 R15: 00007f16b59c55d0
</TASK>