INFO: task hwrng:750 blocked for more than 143 seconds.
Not tainted 6.7.0-rc4-syzkaller-00384-gb10a3ccaf6e3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:hwrng state:D stack:29040 pid:750 tgid:750 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x5b9/0x9d0 kernel/locking/mutex.c:747
hwrng_fillfn+0x145/0x430 drivers/char/hw_random/core.c:504
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8cfb7738 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
#0: ffffffff8cfb7738 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3ff/0x800 kernel/rcu/tree_exp.h:996
1 lock held by khungtaskd/29:
#0: ffffffff8cfabce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8cfabce0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8cfabce0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
1 lock held by hwrng/750:
#0: ffffffff8dbb09e8 (reading_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0x145/0x430 drivers/char/hw_random/core.c:504
2 locks held by getty/4827:
#0: ffff88823bc9c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201
3 locks held by syz-executor.5/5096:
3 locks held by kworker/u5:4/5104:
2 locks held by kworker/0:6/5161:
#0: ffff888013072938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2602
#1: ffffc900046efd80 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2603
5 locks held by kworker/u4:22/11767:
3 locks held by syz-executor.0/16337:
2 locks held by syz-executor.0/16462:
2 locks held by syz-executor.0/16548:
4 locks held by syz-executor.0/16601:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc4-syzkaller-00384-gb10a3ccaf6e3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 16462 Comm: syz-executor.0 Not tainted 6.7.0-rc4-syzkaller-00384-gb10a3ccaf6e3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:match_held_lock+0x1/0xb0 kernel/locking/lockdep.c:5200
Code: f6 90 0f 0b 90 90 90 31 db eb c2 c6 05 85 3e 83 04 01 90 48 c7 c7 20 bb cc 8a e8 2a 96 cd f6 90 0f 0b 90 90 e9 6a ff ff ff 53 <48> 39 77 10 48 89 fb 74 51 66 83 7f 22 1f 76 5d 48 8b 46 08 48 89
RSP: 0018:ffffc900161d6958 EFLAGS: 00000002
RAX: 0000000000000005 RBX: ffff88802165a8a8 RCX: ffffc900161d69f0
RDX: 0000000000000002 RSI: ffffffff8cfabce0 RDI: ffff88802165a8a8
RBP: 0000000000000002 R08: 0000000000000000 R09: fffffbfff1e3287a
R10: ffffffff8f1943d7 R11: 0000000000000001 R12: ffffffff8cfabce0
R13: ffffffff8cfabce0 R14: ffffc900161d69f0 R15: 0000000000000001
FS: 000055555667f480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb055eb8e70 CR3: 0000000088560000 CR4: 0000000000350ef0
Call Trace:
find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:5244
__lock_release kernel/locking/lockdep.c:5429 [inline]
lock_release+0x1fb/0x690 kernel/locking/lockdep.c:5774
rcu_lock_release include/linux/rcupdate.h:306 [inline]
rcu_read_unlock include/linux/rcupdate.h:780 [inline]
folio_evictable+0x136/0x260 mm/internal.h:164
shrink_folio_list+0x4e8/0x3f00 mm/vmscan.c:1043
evict_folios+0x6e7/0x1b90 mm/vmscan.c:4499
try_to_shrink_lruvec+0x769/0xb00 mm/vmscan.c:4678
lru_gen_shrink_lruvec mm/vmscan.c:4817 [inline]
shrink_lruvec+0x314/0x2990 mm/vmscan.c:5592
shrink_node_memcgs mm/vmscan.c:5812 [inline]
shrink_node+0x807/0x3790 mm/vmscan.c:5847
shrink_zones mm/vmscan.c:6086 [inline]
do_try_to_free_pages+0x36c/0x1940 mm/vmscan.c:6148
try_to_free_mem_cgroup_pages+0x31a/0x770 mm/vmscan.c:6463
try_charge_memcg+0x3d3/0x11f0 mm/memcontrol.c:2742
try_charge mm/memcontrol.c:2884 [inline]
charge_memcg mm/memcontrol.c:7210 [inline]
__mem_cgroup_charge+0xa6/0x140 mm/memcontrol.c:7225
mem_cgroup_charge include/linux/memcontrol.h:684 [inline]
__filemap_add_folio+0x88c/0xed0 mm/filemap.c:854
filemap_add_folio+0xb1/0x1e0 mm/filemap.c:937
page_cache_ra_unbounded+0x1d0/0x5f0 mm/readahead.c:250
do_page_cache_ra mm/readahead.c:299 [inline]
page_cache_ra_order+0x72b/0xa80 mm/readahead.c:546
do_sync_mmap_readahead mm/filemap.c:3141 [inline]
filemap_fault+0x16a8/0x3570 mm/filemap.c:3233
__do_fault+0x107/0x600 mm/memory.c:4266
do_cow_fault mm/memory.c:4663 [inline]
do_fault mm/memory.c:4765 [inline]
do_pte_missing mm/memory.c:3731 [inline]
handle_pte_fault mm/memory.c:5039 [inline]
__handle_mm_fault+0x3a8d/0x3d70 mm/memory.c:5180
handle_mm_fault+0x47a/0xa10 mm/memory.c:5345
do_user_addr_fault+0x3d1/0x1000 arch/x86/mm/fault.c:1413
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x5d/0xc0 arch/x86/mm/fault.c:1561
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f2c0342b293
Code: 48 85 c0 74 1b 48 83 f8 01 0f 85 3b 03 00 00 0f b7 44 24 18 66 c1 c0 08 0f b7 c0 48 89 44 24 18 48 8b 44 24 10 0f b7 54 24 18 <66> 89 10 e9 82 fe ff ff 48 83 3c 24 08 0f 85 a1 02 00 00 48 8b 44
RSP: 002b:00007ffe1e78cf80 EFLAGS: 00010246
RAX: 0000000020000080 RBX: 0000000000000002 RCX: 0000000000000000
RDX: 000000000000000a RSI: 0000000000000000 RDI: 000055555667f360
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000081730647 R11: 0000000000000246 R12: 00007f2c030006f8
R13: fffffffffffffffe R14: 00007f2c03000000 R15: 00007f2c03000700