INFO: task syz.1.240:8341 blocked for more than 143 seconds.
Not tainted 6.15.0-rc4-syzkaller-00147-gebd297a2affa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.240 state:D stack:25048 pid:8341 tgid:8340 ppid:7666 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x168f/0x4c70 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
__mutex_lock_common kernel/locking/mutex.c:678 [inline]
__mutex_lock+0x724/0xe80 kernel/locking/mutex.c:746
open_dummy_log fs/jfs/jfs_logmgr.c:1191 [inline]
lmLogOpen+0x1a1/0xfb0 fs/jfs/jfs_logmgr.c:1066
jfs_mount_rw+0xe9/0x670 fs/jfs/jfs_mount.c:257
jfs_fill_super+0x754/0xd90 fs/jfs/super.c:532
get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1636
vfs_get_tree+0x8f/0x2b0 fs/super.c:1759
do_new_mount+0x24a/0xa40 fs/namespace.c:3884
do_mount fs/namespace.c:4224 [inline]
__do_sys_mount fs/namespace.c:4435 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4412
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6acfd9010a
RSP: 002b:00007f6ad0c89e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6ad0c89ef0 RCX: 00007f6acfd9010a
RDX: 0000200000000100 RSI: 0000200000000040 RDI: 00007f6ad0c89eb0
RBP: 0000200000000100 R08: 00007f6ad0c89ef0 R09: 0000000001010006
R10: 0000000001010006 R11: 0000000000000246 R12: 0000200000000040
R13: 00007f6ad0c89eb0 R14: 0000000000006255 R15: 00002000000002c0
Showing all locks held in the system:
1 lock held by ksoftirqd/0/15:
#0: ffff8880b88399d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:605
1 lock held by khungtaskd/31:
#0: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6764
3 locks held by kworker/u8:6/1142:
#0: ffff88814d039948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88814d039948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x9b1/0x17a0 kernel/workqueue.c:3319
#1: ffffc90003ba7c60 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90003ba7c60 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ec/0x17a0 kernel/workqueue.c:3319
#2: ffffffff8f2e1fc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#2: ffffffff8f2e1fc8 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x112/0x14b0 net/ipv6/addrconf.c:4195
3 locks held by kworker/u8:8/1162:
2 locks held by kworker/u8:9/3496:
2 locks held by getty/5568:
#0: ffff88814deb00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002ffe2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
3 locks held by kworker/0:4/5868:
#0: ffff88801a080d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801a080d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b1/0x17a0 kernel/workqueue.c:3319
#1: ffff8880b8823b08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x39e/0x6d0 kernel/sched/psi.c:987
#2: ffff8880b8825558 (&base->lock){-.-.}-{2:2}, at: lock_timer_base kernel/time/timer.c:1046 [inline]
#2: ffff8880b8825558 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x1ae/0xf30 kernel/time/timer.c:1127
2 locks held by syz-executor/6917:
#0: ffff888026a400e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888026a400e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888026a400e0 (&type->s_umount_key#95){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505
#1: ffffffff8e365268 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/7791:
#0: ffff888059ef60e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888059ef60e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888059ef60e0 (&type->s_umount_key#95){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505
#1: ffffffff8e365268 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/8227:
#0: ffff88804cf1a0e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88804cf1a0e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88804cf1a0e0 (&type->s_umount_key#95){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505
#1: ffffffff8e365268 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
1 lock held by syz.9.232/8260:
#0: ffff888026a400e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888026a400e0 (&type->s_umount_key#95){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:120
2 locks held by syz.1.240/8341:
#0: ffff88802135e0e0 (&type->s_umount_key#75/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970 fs/super.c:344
#1: ffffffff8e365268 (jfs_log_mutex){+.+.}-{4:4}, at: open_dummy_log fs/jfs/jfs_logmgr.c:1191 [inline]
#1: ffffffff8e365268 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogOpen+0x1a1/0xfb0 fs/jfs/jfs_logmgr.c:1066
1 lock held by syz.3.250/8505:
#0: ffff888026a400e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888026a400e0 (&type->s_umount_key#95){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:120
2 locks held by syz-executor/8651:
#0: ffff88807b1540e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807b1540e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807b1540e0 (&type->s_umount_key#95){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505
#1: ffffffff8e365268 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/8726:
#0: ffff88807aea40e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807aea40e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807aea40e0 (&type->s_umount_key#95){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505
#1: ffffffff8e365268 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/8855:
#0: ffff88805a0880e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88805a0880e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88805a0880e0 (&type->s_umount_key#95){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505
#1: ffffffff8e365268 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz-executor/8877:
#0: ffff888035e3c0e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888035e3c0e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888035e3c0e0 (&type->s_umount_key#95){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505
#1: ffffffff8e365268 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
2 locks held by syz.0.274/8914:
#0: ffff88807c5c20e0 (&type->s_umount_key#75/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970 fs/super.c:344
#1: ffffffff8e365268 (jfs_log_mutex){+.+.}-{4:4}, at: open_dummy_log fs/jfs/jfs_logmgr.c:1191 [inline]
#1: ffffffff8e365268 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogOpen+0x1a1/0xfb0 fs/jfs/jfs_logmgr.c:1066
1 lock held by syz.1.389/9644:
#0: ffff888026a400e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888026a400e0 (&type->s_umount_key#95){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:120
1 lock held by syz.4.401/9692:
#0: ffff888059ef60e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888059ef60e0 (&type->s_umount_key#95){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:120
1 lock held by syz.2.404/9705:
#0: ffff88804cf1a0e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88804cf1a0e0 (&type->s_umount_key#95){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:120
2 locks held by syz-executor/9755:
#0: ffff8880362940e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880362940e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880362940e0 (&type->s_umount_key#95){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505
#1: ffffffff8e365268 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444
1 lock held by syz.5.407/9984:
#0: ffff88807b1540e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88807b1540e0 (&type->s_umount_key#95){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:120
1 lock held by syz.8.442/10161:
#0: ffff888026a400e0 (&type->s_umount_key#95){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888026a400e0 (&type->s_umount_key#95){++++}-{4:4}, at: super_lock+0x2a9/0x3b0 fs/super.c:120
1 lock held by syz-executor/10164:
#0: ffffffff8df41338 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:304 [inline]
#0: ffffffff8df41338 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f4/0x730 kernel/rcu/tree_exp.h:998
3 locks held by syz-executor/10233:
#0: ffffffff8ea7bd60 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8ea7bd60 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8ea7bd60 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570
#1: ffffffff8f2e1fc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#1: ffffffff8f2e1fc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#1: ffffffff8f2e1fc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8db/0x1c70 net/core/rtnetlink.c:4064
#2: ffffffff8df41338 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline]
#2: ffffffff8df41338 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b7/0x730 kernel/rcu/tree_exp.h:998
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc4-syzkaller-00147-gebd297a2affa #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/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+0xfee/0x1030 kernel/hung_task.c:437
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
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: 1116 Comm: kworker/u8:5 Not tainted 6.15.0-rc4-syzkaller-00147-gebd297a2affa #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:rcu_read_unlock include/linux/rcupdate.h:-1 [inline]
RIP: 0010:batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
RIP: 0010:batadv_nc_worker+0x291/0x610 net/batman-adv/network-coding.c:719
Code: c7 00 0a 92 8c be 66 03 00 00 48 c7 c2 a0 0a 92 8c e8 83 5f 81 f6 48 c7 c7 60 b8 f3 8d 4c 89 ee e8 64 45 81 f6 e8 4f c3 8a f6 <48> 8b 44 24 20 42 0f b6 04 20 84 c0 75 1b 49 ff c7 4c 8b 6c 24 10
RSP: 0018:ffffc90003a47ac0 EFLAGS: 00000287
RAX: 0000000000000000 RBX: ffff88803db91a80 RCX: e321f835a092e700
RDX: 0000000000000002 RSI: ffffffff8d92080b RDI: ffff888026cdda00
RBP: fffffffffffffe38 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8b1cd672 R12: dffffc0000000000
R13: ffffffff8b1cd672 R14: ffff88805bd9cd80 R15: 00000000000002e2
FS: 0000000000000000(0000) GS:ffff888126200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6f72faf580 CR3: 0000000078ffe000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245