INFO: task syz-executor:5227 blocked for more than 143 seconds.
Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:19248 pid:5227 tgid:5227 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
netfs_wait_for_outstanding_io include/linux/netfs.h:533 [inline]
v9fs_evict_inode+0x171/0x360 fs/9p/vfs_inode.c:351
evict+0x532/0x950 fs/inode.c:704
__dentry_kill+0x20d/0x630 fs/dcache.c:615
dput+0x19f/0x2b0 fs/dcache.c:857
shrink_dcache_for_umount+0xb4/0x180 fs/dcache.c:1567
generic_shutdown_super+0x6a/0x2d0 fs/super.c:620
kill_anon_super+0x3b/0x70 fs/super.c:1237
v9fs_kill_super+0x4c/0x90 fs/9p/vfs_super.c:193
deactivate_locked_super+0xc4/0x130 fs/super.c:473
cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
task_work_run+0x24f/0x310 kernel/task_work.c:228
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f11a917e227
RSP: 002b:00007ffd16cf9988 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f11a917e227
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd16cf9a40
RBP: 00007ffd16cf9a40 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd16cfaac0
R13: 00007f11a91eeee4 R14: 00000000000246dd R15: 00007ffd16cfab00
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
2 locks held by kworker/u8:4/63:
#0: ffff88801a889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff88801a889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc900015e7d00 ((work_completion)(&wreq->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc900015e7d00 ((work_completion)(&wreq->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
3 locks held by kworker/u8:8/2558:
2 locks held by getty/4976:
#0: ffff8880305340a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5227:
#0: ffff88807c0ca0e0 (&type->s_umount_key#62){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807c0ca0e0 (&type->s_umount_key#62){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807c0ca0e0 (&type->s_umount_key#62){+.+.}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
4 locks held by kworker/1:5/5278:
#0: ffff8880b893e998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
#1: ffff8880b8928948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:989
#2: ffff88801e2a38c8 (&ACCESS_PRIVATE(ssp->srcu_sup, lock)){....}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline]
#2: ffff88801e2a38c8 (&ACCESS_PRIVATE(ssp->srcu_sup, lock)){....}-{2:2}, at: srcu_reschedule+0x45/0x170 kernel/rcu/srcutree.c:1785
#3: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#3: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#3: ffffffff8e738320 (rcu_read_lock){....}-{1:2}, at: __queue_work+0x199/0xf50 kernel/workqueue.c:2261
1 lock held by syz-executor/6911:
#0: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:296 [inline]
#0: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:958
1 lock held by syz.0.380/7084:
#0: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline]
#0: ffffffff8e73d6f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958
1 lock held by syz-executor/7477:
2 locks held by syz-executor/7478:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 47 Comm: kworker/1:1 Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:chacha_permute+0x36c/0x1050 lib/crypto/chacha.c:29
Code: c1 c6 10 44 01 fa 89 54 24 14 44 89 e7 31 d7 c1 c7 10 8b 54 24 24 01 da 89 54 24 24 41 31 d5 41 c1 c5 10 8b 54 24 54 44 01 ca <41> 31 d3 41 89 d4 41 c1 c3 0c 44 01 f6 31 f1 c1 c1 0c 45 89 d0 41
RSP: 0018:ffffc90000b77548 EFLAGS: 00000082
RAX: 00000000091ac42c RBX: 00000000e6c0d06c RCX: 0000000009419412
RDX: 00000000c1ba8f2c RSI: 00000000b47ab460 RDI: 00000000f3e8ddb6
RBP: 00000000f1a5010c R08: 00000000619c7fcc R09: 00000000aad0b8c2
R10: 000000006ade13de R11: 000000006d602cac R12: 00000000df9799a5
R13: 000000007fe8b5e3 R14: 00000000b57e1398 R15: 0000000003f55324
FS: 0000000000000000(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056435979f6d8 CR3: 0000000031f52000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
chacha_block_generic+0x9f/0x1340 lib/crypto/chacha.c:83
chacha20_block include/crypto/chacha.h:36 [inline]
crng_fast_key_erasure drivers/char/random.c:318 [inline]
crng_make_state+0x38d/0xa80 drivers/char/random.c:384
_get_random_bytes+0xd7/0x2c0 drivers/char/random.c:398
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:776 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x630/0xaa0 drivers/net/netdevsim/dev.c:850
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd10 kernel/workqueue.c:3389
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244