INFO: task syz.4.250:7517 blocked for more than 143 seconds.
      Tainted: G        W           6.16.0-syzkaller-03556-g0919a5b3b11c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.250       state:D stack:28328 pid:7517  tgid:7492  ppid:5827   task_flags:0x400040 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5397 [inline]
 __schedule+0x165b/0x4c50 kernel/sched/core.c:6786
 __schedule_loop kernel/sched/core.c:6864 [inline]
 rt_mutex_schedule+0x77/0xf0 kernel/sched/core.c:7160
 rt_mutex_slowlock_block kernel/locking/rtmutex.c:1647 [inline]
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]
 __rt_mutex_slowlock_locked+0x1e04/0x25e0 kernel/locking/rtmutex.c:1760
 rt_mutex_slowlock+0xb5/0x160 kernel/locking/rtmutex.c:1800
 __rt_mutex_lock kernel/locking/rtmutex.c:1815 [inline]
 rwbase_write_lock+0x14f/0x750 kernel/locking/rwbase_rt.c:244
 inode_lock_nested include/linux/fs.h:914 [inline]
 lock_rename fs/namei.c:3272 [inline]
 do_renameat2+0x3b9/0xa80 fs/namei.c:5224
 __do_sys_rename fs/namei.c:5325 [inline]
 __se_sys_rename fs/namei.c:5323 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:5323
 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: 0033:0x7fb36a1de9a9
RSP: 002b:00007fb368025038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fb36a406080 RCX: 00007fb36a1de9a9
RDX: 0000000000000000 RSI: 0000200000000c00 RDI: 0000200000000500
RBP: 00007fb36a260d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fb36a406080 R15: 00007ffcd35e89d8
 </TASK>
INFO: task syz.4.250:7519 blocked for more than 143 seconds.
      Tainted: G        W           6.16.0-syzkaller-03556-g0919a5b3b11c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.250       state:D stack:26984 pid:7519  tgid:7492  ppid:5827   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5397 [inline]
 __schedule+0x165b/0x4c50 kernel/sched/core.c:6786
 __schedule_loop kernel/sched/core.c:6864 [inline]
 rt_mutex_schedule+0x77/0xf0 kernel/sched/core.c:7160
 rt_mutex_slowlock_block kernel/locking/rtmutex.c:1647 [inline]
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]
 __rt_mutex_slowlock_locked+0x1e04/0x25e0 kernel/locking/rtmutex.c:1760
 rt_mutex_slowlock+0xb5/0x160 kernel/locking/rtmutex.c:1800
 __rt_mutex_lock kernel/locking/rtmutex.c:1815 [inline]
 rwbase_write_lock+0x14f/0x750 kernel/locking/rwbase_rt.c:244
 inode_lock include/linux/fs.h:869 [inline]
 process_measurement+0x3de/0x1a40 security/integrity/ima/ima_main.c:260
 ima_file_check+0xd7/0x120 security/integrity/ima/ima_main.c:613
 security_file_post_open+0xbb/0x290 security/security.c:3160
 do_open fs/namei.c:3889 [inline]
 path_openat+0x2f32/0x3840 fs/namei.c:4046
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_creat fs/open.c:1528 [inline]
 __se_sys_creat fs/open.c:1522 [inline]
 __x64_sys_creat+0x8f/0xc0 fs/open.c:1522
 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: 0033:0x7fb36a1de9a9
RSP: 002b:00007fb368004038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007fb36a406160 RCX: 00007fb36a1de9a9
RDX: 0000000000000000 RSI: 00000000000000e0 RDI: 0000200000000100
RBP: 00007fb36a260d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fb36a406160 R15: 00007ffcd35e89d8
 </TASK>
INFO: task syz.4.250:7521 blocked for more than 143 seconds.
      Tainted: G        W           6.16.0-syzkaller-03556-g0919a5b3b11c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.250       state:D stack:26920 pid:7521  tgid:7492  ppid:5827   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5397 [inline]
 __schedule+0x165b/0x4c50 kernel/sched/core.c:6786
 __schedule_loop kernel/sched/core.c:6864 [inline]
 rt_mutex_schedule+0x77/0xf0 kernel/sched/core.c:7160
 rt_mutex_slowlock_block kernel/locking/rtmutex.c:1647 [inline]
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]
 __rt_mutex_slowlock_locked+0x1e04/0x25e0 kernel/locking/rtmutex.c:1760
 rt_mutex_slowlock+0xb5/0x160 kernel/locking/rtmutex.c:1800
 __rt_mutex_lock kernel/locking/rtmutex.c:1815 [inline]
 rwbase_write_lock+0x14f/0x750 kernel/locking/rwbase_rt.c:244
 inode_lock include/linux/fs.h:869 [inline]
 process_measurement+0x3de/0x1a40 security/integrity/ima/ima_main.c:260
 ima_file_check+0xd7/0x120 security/integrity/ima/ima_main.c:613
 security_file_post_open+0xbb/0x290 security/security.c:3160
 do_open fs/namei.c:3889 [inline]
 path_openat+0x2f32/0x3840 fs/namei.c:4046
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1461
 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: 0033:0x7fb36a1de9a9
RSP: 002b:00007fb367be1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb36a406240 RCX: 00007fb36a1de9a9
RDX: 0000000000105042 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007fb36a260d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000045 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb36a406240 R15: 00007ffcd35e89d8
 </TASK>
INFO: task syz.4.250:7524 blocked for more than 143 seconds.
      Tainted: G        W           6.16.0-syzkaller-03556-g0919a5b3b11c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.250       state:D stack:28552 pid:7524  tgid:7492  ppid:5827   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5397 [inline]
 __schedule+0x165b/0x4c50 kernel/sched/core.c:6786
 __schedule_loop kernel/sched/core.c:6864 [inline]
 rt_mutex_schedule+0x77/0xf0 kernel/sched/core.c:7160
 rt_mutex_slowlock_block kernel/locking/rtmutex.c:1647 [inline]
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]
 __rt_mutex_slowlock_locked+0x1e04/0x25e0 kernel/locking/rtmutex.c:1760
 rt_mutex_slowlock+0xb5/0x160 kernel/locking/rtmutex.c:1800
 __rt_mutex_lock kernel/locking/rtmutex.c:1815 [inline]
 rwbase_write_lock+0x14f/0x750 kernel/locking/rwbase_rt.c:244
 inode_lock include/linux/fs.h:869 [inline]
 open_last_lookups fs/namei.c:3804 [inline]
 path_openat+0x8e6/0x3840 fs/namei.c:4043
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_open fs/open.c:1458 [inline]
 __se_sys_open fs/open.c:1454 [inline]
 __x64_sys_open+0x11e/0x150 fs/open.c:1454
 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: 0033:0x7fb36a1de9a9
RSP: 002b:00007fb3677be038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fb36a406320 RCX: 00007fb36a1de9a9
RDX: 0000000000000000 RSI: 000000000014927e RDI: 0000200000000180
RBP: 00007fb36a260d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb36a406320 R15: 00007ffcd35e89d8
 </TASK>
INFO: task syz.4.250:7526 blocked for more than 143 seconds.
      Tainted: G        W           6.16.0-syzkaller-03556-g0919a5b3b11c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.250       state:D stack:26920 pid:7526  tgid:7492  ppid:5827   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5397 [inline]
 __schedule+0x165b/0x4c50 kernel/sched/core.c:6786
 __schedule_loop kernel/sched/core.c:6864 [inline]
 rt_mutex_schedule+0x77/0xf0 kernel/sched/core.c:7160
 rt_mutex_slowlock_block kernel/locking/rtmutex.c:1647 [inline]
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]
 __rt_mutex_slowlock_locked+0x1e04/0x25e0 kernel/locking/rtmutex.c:1760
 __rwbase_read_lock+0xbc/0x180 kernel/locking/rwbase_rt.c:114
 rwbase_read_lock kernel/locking/rwbase_rt.c:147 [inline]
 __down_read kernel/locking/rwsem.c:1453 [inline]
 down_read+0x127/0x1f0 kernel/locking/rwsem.c:1526
 inode_lock_shared include/linux/fs.h:884 [inline]
 lookup_slow+0x46/0x70 fs/namei.c:1824
 walk_component fs/namei.c:2129 [inline]
 link_path_walk+0x935/0xea0 fs/namei.c:2497
 path_parentat fs/namei.c:2701 [inline]
 __filename_parentat+0x246/0x670 fs/namei.c:2725
 filename_parentat fs/namei.c:2743 [inline]
 filename_create+0xd2/0x3c0 fs/namei.c:4120
 do_mkdirat+0xa0/0x590 fs/namei.c:4391
 __do_sys_mkdir fs/namei.c:4421 [inline]
 __se_sys_mkdir fs/namei.c:4419 [inline]
 __x64_sys_mkdir+0x6c/0x80 fs/namei.c:4419
 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: 0033:0x7fb36a1de9a9
RSP: 002b:00007fb36739b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fb36a406400 RCX: 00007fb36a1de9a9
RDX: 0000000000000000 RSI: 000000000000f62b RDI: 0000200000000000
RBP: 00007fb36a260d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb36a406400 R15: 00007ffcd35e89d8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/38:
 #0: ffffffff8d7aa380 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff8d7aa380 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #0: ffffffff8d7aa380 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
7 locks held by kworker/u8:3/57:
4 locks held by kworker/u8:17/2966:
 #0: ffff888142af8138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
 #0: ffff888142af8138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321
 #1: ffffc9000d647bc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
 #1: ffffc9000d647bc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321
 #2: ffff888036ca20d0 (&type->s_umount_key#80){++++}-{4:4}, at: super_trylock_shared+0x20/0xf0 fs/super.c:563
 #3: ffff888060d96dd8 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530 fs/jfs/inode.c:102
2 locks held by dhcpcd/5486:
 #0: ffffffff8ea85cb8 (vlan_ioctl_mutex){+.+.}-{4:4}, at: sock_ioctl+0x5f1/0x790 net/socket.c:1319
 #1: ffffffff8eaa13b8 (rtnl_mutex){+.+.}-{4:4}, at: vlan_ioctl_handler+0xd0/0x650 net/8021q/vlan.c:577
2 locks held by getty/5582:
 #0: ffff88823bf380a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90003e932e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x444/0x1410 drivers/tty/n_tty.c:2222
5 locks held by syz.4.250/7493:
2 locks held by syz.4.250/7517:
 #0: ffff888036ca2488 (sb_writers#26){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
 #1: ffff888060d971a8 (&type->i_mutex_dir_key#14/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
 #1: ffff888060d971a8 (&type->i_mutex_dir_key#14/1){+.+.}-{4:4}, at: lock_rename fs/namei.c:3272 [inline]
 #1: ffff888060d971a8 (&type->i_mutex_dir_key#14/1){+.+.}-{4:4}, at: do_renameat2+0x3b9/0xa80 fs/namei.c:5224
2 locks held by syz.4.250/7519:
 #0: ffff888036ca2488 (sb_writers#26){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
 #1: ffff88803f7471a8 (&sb->s_type->i_mutex_key#32){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
 #1: ffff88803f7471a8 (&sb->s_type->i_mutex_key#32){+.+.}-{4:4}, at: process_measurement+0x3de/0x1a40 security/integrity/ima/ima_main.c:260
1 lock held by syz.4.250/7521:
 #0: ffff88803f7471a8 (&sb->s_type->i_mutex_key#32){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
 #0: ffff88803f7471a8 (&sb->s_type->i_mutex_key#32){+.+.}-{4:4}, at: process_measurement+0x3de/0x1a40 security/integrity/ima/ima_main.c:260
2 locks held by syz.4.250/7524:
 #0: ffff888036ca2488 (sb_writers#26){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
 #1: ffff888060d971a8 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
 #1: ffff888060d971a8 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: open_last_lookups fs/namei.c:3804 [inline]
 #1: ffff888060d971a8 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: path_openat+0x8e6/0x3840 fs/namei.c:4043
1 lock held by syz.4.250/7526:
 #0: ffff888060d971a8 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline]
 #0: ffff888060d971a8 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1824
4 locks held by syz-executor/8199:
 #0: ffff888035b54488 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3105 [inline]
 #0: ffff888035b54488 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x217/0xaa0 fs/read_write.c:682
 #1: ffff88805be65078 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e1/0x4f0 fs/kernfs/file.c:325
 #2: ffff888027966e18 (kn->active#53){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x204/0x4f0 fs/kernfs/file.c:326
 #3: ffffffff8e33c378 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: new_device_store+0x12c/0x6f0 drivers/net/netdevsim/bus.c:166
4 locks held by syz-executor/8222:
 #0: ffff888035b54488 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3105 [inline]
 #0: ffff888035b54488 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x217/0xaa0 fs/read_write.c:682
 #1: ffff88805e5f6c78 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e1/0x4f0 fs/kernfs/file.c:325
 #2: ffff888027966f08 (kn->active#52){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x204/0x4f0 fs/kernfs/file.c:326
 #3: ffffffff8e33c378 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd1/0x360 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/8225:
 #0: ffff888035b54488 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3105 [inline]
 #0: ffff888035b54488 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x217/0xaa0 fs/read_write.c:682
 #1: ffff88805f4cf078 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e1/0x4f0 fs/kernfs/file.c:325
 #2: ffff888027966e18 (kn->active#53){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x204/0x4f0 fs/kernfs/file.c:326
 #3: ffffffff8e33c378 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: new_device_store+0x12c/0x6f0 drivers/net/netdevsim/bus.c:166
4 locks held by syz-executor/8229:
 #0: ffff888035b54488 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3105 [inline]
 #0: ffff888035b54488 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x217/0xaa0 fs/read_write.c:682
 #1: ffff88805e346478 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e1/0x4f0 fs/kernfs/file.c:325
 #2: ffff888027966e18 (kn->active#53){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x204/0x4f0 fs/kernfs/file.c:326
 #3: ffffffff8e33c378 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: new_device_store+0x12c/0x6f0 drivers/net/netdevsim/bus.c:166
5 locks held by syz-executor/8232:
 #0: ffff888035b54488 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3105 [inline]
 #0: ffff888035b54488 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x217/0xaa0 fs/read_write.c:682
 #1: ffff88805f396878 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1e1/0x4f0 fs/kernfs/file.c:325
 #2: ffff888027966f08 (kn->active#52){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x204/0x4f0 fs/kernfs/file.c:326
 #3: ffffffff8e33c378 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd1/0x360 drivers/net/netdevsim/bus.c:216
 #4: ffff888023eed0d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:911 [inline]
 #4: ffff888023eed0d8 (&dev->mutex){....}-{4:4}, at: device_del+0xa9/0x8e0 drivers/base/core.c:3843

=============================================

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Tainted: G        W           6.16.0-syzkaller-03556-g0919a5b3b11c #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 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+0xe9e/0xee0 kernel/hung_task.c:470
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 7493 Comm: syz.4.250 Tainted: G        W           6.16.0-syzkaller-03556-g0919a5b3b11c #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x97/0xa0 kernel/kcov.c:302
Code: 8d 51 28 4d 39 ca 77 22 89 ff 89 f6 49 ff c0 4c 89 02 48 c7 44 0a 08 01 00 00 00 48 89 7c 0a 10 48 89 74 0a 18 48 89 44 0a 20 <e9> 14 37 33 09 cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000421f680 EFLAGS: 00000297
RAX: ffffffff8332ca85 RBX: 0000000000000004 RCX: ffff88802a801dc0
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 00000000000000ff
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0030000000000000 R11: 000007ff00000020 R12: dffffc0000000000
R13: ffff888031e58000 R14: 0000000000000000 R15: 1ffff110063cb002
FS:  00007fb3680466c0(0000) GS:ffff888126b23000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fab52787774 CR3: 000000002ffac000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 dtSplitRoot+0x775/0x16c0 fs/jfs/jfs_dtree.c:1979
 dtSplitUp fs/jfs/jfs_dtree.c:993 [inline]
 dtInsert+0xef8/0x5f40 fs/jfs/jfs_dtree.c:871
 jfs_link+0x312/0x550 fs/jfs/namei.c:826
 vfs_link+0x4ed/0x6e0 fs/namei.c:4854
 do_linkat+0x272/0x560 fs/namei.c:4924
 __do_sys_link fs/namei.c:4958 [inline]
 __se_sys_link fs/namei.c:4956 [inline]
 __x64_sys_link+0x82/0x90 fs/namei.c:4956
 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: 0033:0x7fb36a1de9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb368046038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007fb36a405fa0 RCX: 00007fb36a1de9a9
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 00002000000001c0
RBP: 00007fb36a260d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb36a405fa0 R15: 00007ffcd35e89d8
 </TASK>