INFO: task jfsCommit:109 blocked for more than 142 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jfsCommit state:D stack:27344 pid:109 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5246 [inline]
__schedule+0x107f/0x4030 kernel/sched/core.c:6563
schedule+0xb9/0x180 kernel/sched/core.c:6639
io_schedule+0x7c/0xd0 kernel/sched/core.c:8799
__lock_metapage fs/jfs/jfs_metapage.c:50 [inline]
lock_metapage+0x1f4/0x320 fs/jfs/jfs_metapage.c:64
__get_metapage+0x4c9/0xfb0 fs/jfs/jfs_metapage.c:639
diIAGRead+0xce/0x140 fs/jfs/jfs_imap.c:2672
diFree+0x8e1/0x2470 fs/jfs/jfs_imap.c:959
jfs_evict_inode+0x31a/0x430 fs/jfs/inode.c:162
evict+0x4b6/0x8b0 fs/inode.c:705
txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline]
jfs_lazycommit+0x435/0xa90 fs/jfs/jfs_txnmgr.c:2733
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz-executor:4286 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22384 pid:4286 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5246 [inline]
__schedule+0x107f/0x4030 kernel/sched/core.c:6563
schedule+0xb9/0x180 kernel/sched/core.c:6639
io_schedule+0x7c/0xd0 kernel/sched/core.c:8799
__lock_metapage fs/jfs/jfs_metapage.c:50 [inline]
lock_metapage+0x1f4/0x320 fs/jfs/jfs_metapage.c:64
__get_metapage+0x4c9/0xfb0 fs/jfs/jfs_metapage.c:639
diIAGRead fs/jfs/jfs_imap.c:2672 [inline]
diRead+0x20b/0xbb0 fs/jfs/jfs_imap.c:316
jfs_iget+0x89/0x3f0 fs/jfs/inode.c:35
jfs_lookup+0x21d/0x420 fs/jfs/namei.c:1469
__lookup_slow+0x29d/0x3f0 fs/namei.c:1698
lookup_slow+0x53/0x70 fs/namei.c:1715
walk_component+0x2ad/0x3e0 fs/namei.c:2006
lookup_last fs/namei.c:2463 [inline]
path_lookupat+0x148/0x420 fs/namei.c:2487
filename_lookup+0x229/0x580 fs/namei.c:2516
user_path_at_empty+0x3e/0x60 fs/namei.c:2956
user_path_at include/linux/namei.h:57 [inline]
ksys_umount fs/namespace.c:1829 [inline]
__do_sys_umount fs/namespace.c:1837 [inline]
__se_sys_umount fs/namespace.c:1835 [inline]
__x64_sys_umount+0xf9/0x170 fs/namespace.c:1835
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f651119f397
RSP: 002b:00007ffcff571ee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f651119f397
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcff571fa0
RBP: 00007ffcff571fa0 R08: 00007ffcff572fa0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcff573090
R13: 00007f6511234474 R14: 0000000000021e99 R15: 00007ffcff574160
Showing all locks held in the system:
2 locks held by kworker/u4:0/9:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2e5b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xef0 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb2edd0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xef0 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8cb2dc20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2dc20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2dc20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6527
2 locks held by jfsCommit/109:
#0: ffff888055050920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2e1/0x2470 fs/jfs/jfs_imap.c:889
#1: ffff88807064e6f8 (&jfs_ip->rdwrlock/1){.+.+}-{3:3}, at: diFree+0x2ff/0x2470 fs/jfs/jfs_imap.c:894
2 locks held by getty/4028:
#0: ffff88814d4e6098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41e/0x1360 drivers/tty/n_tty.c:2198
2 locks held by syz-executor/4286:
#0: ffff88807064f480 (&type->i_mutex_dir_key#11){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:774 [inline]
#0: ffff88807064f480 (&type->i_mutex_dir_key#11){++++}-{3:3}, at: lookup_slow+0x46/0x70 fs/namei.c:1714
#1: ffff88807064e6f8 (&jfs_ip->rdwrlock/1){.+.+}-{3:3}, at: diRead+0x13d/0xbb0 fs/jfs/jfs_imap.c:315
4 locks held by kworker/u4:16/6351:
#0: ffff8880b8f3acd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x130 kernel/sched/core.c:538
#1: ffff8880b8f27888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x400/0x740 kernel/sched/psi.c:999
#2: ffff8880579022f8 (&devlink->lock_key#6){+.+.}-{3:3}, at: nsim_dev_trap_report_work+0x53/0xa80 drivers/net/netdevsim/dev.c:838
#3: ffffffff8cb33198 (rcu_node_0){-.-.}-{2:2}, at: rcu_preempt_deferred_qs_irqrestore+0x23c/0xbd0 kernel/rcu/tree_plugin.h:518
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3e6/0x460 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf0e/0xf50 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5333 Comm: kworker/u4:12 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:chacha_permute+0x44c/0xef0 lib/crypto/chacha.c:57
Code: 89 54 24 08 45 31 d5 41 c1 c5 08 44 01 f2 89 54 24 40 31 d0 c1 c0 08 44 01 fe 89 74 24 3c 31 f5 c1 c5 08 44 01 df 89 7c 24 38 <31> fb c1 c3 08 45 01 e8 44 89 44 24 30 45 31 c4 41 c1 c4 07 89 44
RSP: 0018:ffffc900038a7610 EFLAGS: 00000083
RAX: 00000000206ff338 RBX: 0000000014560fe1 RCX: 0000000035dfc1e7
RDX: 00000000b7ede03f RSI: 000000000fbe162f RDI: 00000000b8017379
RBP: 00000000d7684e11 R08: 000000008ac09a70 R09: 0000000024a9ed0b
R10: 00000000795d93f2 R11: 00000000c6d08181 R12: 0000000024a9ed0b
R13: 00000000e5a7d5f0 R14: 0000000037f53160 R15: 00000000188652eb
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005640f1046168 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
chacha_block_generic+0xb3/0xd80 lib/crypto/chacha.c:83
chacha20_block include/crypto/chacha.h:36 [inline]
crng_fast_key_erasure drivers/char/random.c:259 [inline]
crng_make_state+0x3b2/0xb00 drivers/char/random.c:352
_get_random_bytes+0xfc/0x250 drivers/char/random.c:366
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:775 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x5fa/0xa80 drivers/net/netdevsim/dev.c:851
process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295