INFO: task syz.5.3166:6728 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.3166 state:D stack:26880 pid:6728 tgid:6723 ppid:5499 flags:0x00000004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe5a/0x5ae0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
io_schedule+0xbf/0x130 kernel/sched/core.c:7681
folio_wait_bit_common+0x3d8/0x9b0 mm/filemap.c:1309
folio_wait_writeback+0x3c/0x90 mm/page-writeback.c:3189
mpage_prepare_extent_to_map+0x533/0x1470 fs/ext4/inode.c:2496
ext4_do_writepages+0x974/0x32f0 fs/ext4/inode.c:2688
ext4_writepages+0x303/0x730 fs/ext4/inode.c:2824
do_writepages+0x1b3/0x820 mm/page-writeback.c:2683
filemap_fdatawrite_wbc mm/filemap.c:398 [inline]
filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:388
__filemap_fdatawrite_range+0xb3/0xf0 mm/filemap.c:431
file_write_and_wait_range+0xca/0x140 mm/filemap.c:788
ext4_sync_file+0x290/0xf30 fs/ext4/fsync.c:158
vfs_fsync_range+0x136/0x220 fs/sync.c:187
__do_sys_msync+0x3c6/0x5b0 mm/msync.c:96
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f98a8b7e819
RSP: 002b:00007f98a999a038 EFLAGS: 00000246 ORIG_RAX: 000000000000001a
RAX: ffffffffffffffda RBX: 00007f98a8d36080 RCX: 00007f98a8b7e819
RDX: 0000000400000004 RSI: 0080100000000002 RDI: 000000001ffff000
RBP: 00007f98a8bf175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f98a8d36080 R15: 00007ffeeca76178
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8ddba840 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8ddba840 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8ddba840 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
2 locks held by klogd/5209:
#0: ffff8880b873ed58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598
#1: ffff8880b873ed58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598
2 locks held by getty/5603:
#0: ffff8880351020a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fc62f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
3 locks held by syz-executor/5832:
#0: ffff888028c70580 (&vma->vm_lock->lock){++++}-{4:4}, at: vma_start_read include/linux/mm.h:716 [inline]
#0: ffff888028c70580 (&vma->vm_lock->lock){++++}-{4:4}, at: lock_vma_under_rcu+0x13e/0x980 mm/memory.c:6243
#1: ffff888034e3e518 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x177/0x380 mm/memory.c:3162
#2: ffff888034d82958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448
4 locks held by kworker/u8:19/29810:
#0: ffff888143aa4148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
#1: ffffc9000521fd80 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
#2: ffff888034e3e0e0 (&type->s_umount_key#32){++++}-{4:4}, at: super_trylock_shared+0x1e/0xf0 fs/super.c:562
#3: ffff888034d80b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: do_writepages+0x1b3/0x820 mm/page-writeback.c:2683
4 locks held by kworker/u8:20/29811:
#0: ffff888034a53148 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
#1: ffffc900050dfd80 ((work_completion)(&ei->i_rsv_conversion_work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
#2: ffff888034d82958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448
#3: ffff888079bc47e0 (&ei->i_data_sem){++++}-{4:4}, at: ext4_map_blocks+0x352/0x1370 fs/ext4/inode.c:701
1 lock held by syz.5.3166/6728:
#0: ffff888034d80b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: do_writepages+0x1b3/0x820 mm/page-writeback.c:2683
3 locks held by syz-executor/7000:
#0: ffff888034e3e420 (sb_writers#4){.+.+}-{0:0}, at: filename_create+0x10d/0x530 fs/namei.c:4073
#1: ffff888079be8de0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:853 [inline]
#1: ffff888079be8de0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1c2/0x530 fs/namei.c:4080
#2: ffff888034d82958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 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+0xf0c/0x1240 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 12671 Comm: kworker/u8:35 Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:__lock_release kernel/locking/lockdep.c:5535 [inline]
RIP: 0010:lock_release+0x26c/0x6f0 kernel/locking/lockdep.c:5870
Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2c 04 00 00 8b 55 24 85 d2 0f 85 bc 03 00 00 <48> 8d 7d 22 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f
RSP: 0018:ffffc900189679b8 EFLAGS: 00000046
RAX: 0000000000000007 RBX: 1ffff9200312cf39 RCX: ffffc90018967a08
RDX: 0000000000000000 RSI: ffff8880b863b148 RDI: ffff88802a258ba4
RBP: ffff88802a258b80 R08: 0000000000000000 R09: fffffbfff2039a3a
R10: ffffffff901cd1d7 R11: e6f64ab4825f08cf R12: ffff8880b863b148
R13: 0000000000000005 R14: ffff88802a258ad8 R15: ffff88802a258000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005566350e4198 CR3: 000000002f70e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
local_lock_release include/linux/local_lock_internal.h:38 [inline]
crng_make_state+0x282/0x6d0 drivers/char/random.c:393
_get_random_bytes+0x124/0x1e0 drivers/char/random.c:406
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+0x7af/0xd20 drivers/net/netdevsim/dev.c:851
process_one_work+0x958/0x1b30 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>