INFO: task syz.1.38:6266 blocked for more than 143 seconds.
Not tainted 6.16.0-rc6-syzkaller-00121-g6832a9317eee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.38 state:D stack:25128 pid:6266 tgid:6265 ppid:5840 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6936
rwsem_down_write_slowpath+0xbec/0x1030 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write_nested+0x1b5/0x200 kernel/locking/rwsem.c:1694
inode_lock_nested include/linux/fs.h:914 [inline]
vfs_rename+0x651/0xec0 fs/namei.c:5100
do_renameat2+0x878/0xc50 fs/namei.c:5286
__do_sys_rename fs/namei.c:5333 [inline]
__se_sys_rename fs/namei.c:5331 [inline]
__x64_sys_rename+0x82/0x90 fs/namei.c:5331
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f75ebb8e9a9
RSP: 002b:00007f75ec9c8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f75ebdb5fa0 RCX: 00007f75ebb8e9a9
RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 0000200000000000
RBP: 00007f75ebc10ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f75ebdb5fa0 R15: 00007fff2cbf21a8
INFO: task syz.1.38:6291 blocked for more than 144 seconds.
Not tainted 6.16.0-rc6-syzkaller-00121-g6832a9317eee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.38 state:D stack:28584 pid:6291 tgid:6265 ppid:5840 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6936
rwsem_down_read_slowpath+0x552/0x880 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x98/0x2e0 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:884 [inline]
lookup_slow+0x46/0x70 fs/namei.c:1833
walk_component+0x2d2/0x400 fs/namei.c:2138
lookup_last fs/namei.c:2639 [inline]
path_lookupat+0x163/0x430 fs/namei.c:2663
filename_lookup+0x212/0x570 fs/namei.c:2692
vfs_statx+0xf8/0x550 fs/stat.c:353
vfs_fstatat fs/stat.c:375 [inline]
vfs_lstat include/linux/fs.h:3563 [inline]
__do_sys_newlstat fs/stat.c:528 [inline]
__se_sys_newlstat fs/stat.c:522 [inline]
__x64_sys_newlstat+0xea/0x170 fs/stat.c:522
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f75ebb8e9a9
RSP: 002b:00007f75ec9a7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
RAX: ffffffffffffffda RBX: 00007f75ebdb6080 RCX: 00007f75ebb8e9a9
RDX: 0000000000000000 RSI: 0000200000000480 RDI: 0000200000000440
RBP: 00007f75ebc10ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f75ebdb6080 R15: 00007fff2cbf21a8
INFO: task syz.1.38:6294 blocked for more than 144 seconds.
Not tainted 6.16.0-rc6-syzkaller-00121-g6832a9317eee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.38 state:D stack:28904 pid:6294 tgid:6265 ppid:5840 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16a2/0x4cb0 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6936
rwsem_down_read_slowpath+0x552/0x880 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x98/0x2e0 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:884 [inline]
lookup_slow+0x46/0x70 fs/namei.c:1833
walk_component+0x2d2/0x400 fs/namei.c:2138
lookup_last fs/namei.c:2639 [inline]
path_lookupat+0x163/0x430 fs/namei.c:2663
filename_lookup+0x212/0x570 fs/namei.c:2692
user_path_at+0x3a/0x60 fs/namei.c:3136
do_mount fs/namespace.c:4236 [inline]
__do_sys_mount fs/namespace.c:4450 [inline]
__se_sys_mount+0x2d3/0x410 fs/namespace.c:4427
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f75ebb8e9a9
RSP: 002b:00007f75ec986038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f75ebdb6160 RCX: 00007f75ebb8e9a9
RDX: 00002000000002c0 RSI: 0000200000000280 RDI: 0000000000000000
RBP: 00007f75ebc10ca1 R08: 0000200000000500 R09: 0000000000000000
R10: 0000000000980008 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f75ebdb6160 R15: 00007fff2cbf21a8
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffff8880b8739e18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:606
1 lock held by khungtaskd/31:
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by getty/5603:
#0: ffff8880315fe0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
2 locks held by syz-executor/5853:
#0: ffffffff8e87ca28 (bio_slab_lock){+.+.}-{4:4}, at: bio_put_slab block/bio.c:140 [inline]
#0: ffffffff8e87ca28 (bio_slab_lock){+.+.}-{4:4}, at: bioset_exit+0x44a/0x690 block/bio.c:1758
#1: ffffffff8e144ac0 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570 kernel/rcu/tree.c:3786
5 locks held by syz.1.38/6266:
#0: ffff888024f8c428 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff888024f8c738 (&type->s_vfs_rename_key#3){+.+.}-{4:4}, at: lock_rename fs/namei.c:3285 [inline]
#1: ffff888024f8c738 (&type->s_vfs_rename_key#3){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 fs/namei.c:5232
#2: ffff8880547302a0 (&sb->s_type->i_mutex_key#31/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#2: ffff8880547302a0 (&sb->s_type->i_mutex_key#31/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 fs/namei.c:3251
#3: ffff888054730910 (&sb->s_type->i_mutex_key#32/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#3: ffff888054730910 (&sb->s_type->i_mutex_key#32/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 fs/namei.c:3252
#4: ffff888054730910 (&sb->s_type->i_mutex_key#33/2){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#4: ffff888054730910 (&sb->s_type->i_mutex_key#33/2){+.+.}-{4:4}, at: vfs_rename+0x651/0xec0 fs/namei.c:5100
1 lock held by syz.1.38/6291:
#0: ffff888054730910 (&sb->s_type->i_mutex_key#34){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline]
#0: ffff888054730910 (&sb->s_type->i_mutex_key#34){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1833
1 lock held by syz.1.38/6294:
#0: ffff8880547302a0 (&sb->s_type->i_mutex_key#34){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline]
#0: ffff8880547302a0 (&sb->s_type->i_mutex_key#34){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1833
1 lock held by syz-executor/7882:
#0: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:304 [inline]
#0: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730 kernel/rcu/tree_exp.h:998
1 lock held by syz.1.314/9001:
1 lock held by cmp/9044:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-syzkaller-00121-g6832a9317eee #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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:307 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:470
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
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: 8111 Comm: kworker/u8:9 Not tainted 6.16.0-rc6-syzkaller-00121-g6832a9317eee #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0x44/0x3e0 kernel/locking/lockdep.c:5882
Code: 8b 05 d0 24 fe 10 48 89 44 24 28 0f 1f 44 00 00 65 8b 05 d3 24 fe 10 83 f8 08 0f 83 9a 02 00 00 89 c0 48 0f a3 05 7c 61 02 0e <73> 16 e8 d5 df 08 00 84 c0 75 0d f6 05 72 4c ec 0d 01 0f 84 ad 02
RSP: 0000:ffffc90002f776d8 EFLAGS: 00000097
RAX: 0000000000000001 RBX: ffff8880b8736170 RCX: ffff88807904bc00
RDX: 0000000000000000 RSI: ffffffff85423dfa RDI: ffff8880b8736178
RBP: ffffc90002f77830 R08: ffffc90002f776bf R09: 0000000000000000
R10: ffffc90002f77680 R11: fffff520005eeed8 R12: dffffc0000000000
R13: ffffffff85423dfa R14: ffff8880b8736178 R15: ffff8880b87361a0
FS: 0000000000000000(0000) GS:ffff888125d59000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f22800c66bc CR3: 000000004381a000 CR4: 00000000003526f0
Call Trace:
local_lock_release include/linux/local_lock_internal.h:54 [inline]
crng_make_state+0x331/0x700 drivers/char/random.c:393
_get_random_bytes+0xd5/0x210 drivers/char/random.c:406
eth_random_addr include/linux/etherdevice.h:238 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:755 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x35d/0xb80 drivers/net/netdevsim/dev.c:851
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245