INFO: task syz.4.2323:13993 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.2323      state:D stack:28904 pid:13993 tgid:13985 ppid:5830   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5254 [inline]
 __schedule+0x17c4/0x4d60 kernel/sched/core.c:6862
 __schedule_loop kernel/sched/core.c:6944 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6959
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7016
 rwsem_down_read_slowpath+0x5fd/0x8f0 kernel/locking/rwsem.c:1086
 __down_read_common kernel/locking/rwsem.c:1261 [inline]
 __down_read kernel/locking/rwsem.c:1274 [inline]
 down_read+0x98/0x2e0 kernel/locking/rwsem.c:1539
 inode_lock_shared include/linux/fs.h:1078 [inline]
 lookup_slow+0x46/0x70 fs/namei.c:1832
 walk_component+0x2d2/0x400 fs/namei.c:2151
 lookup_last fs/namei.c:2652 [inline]
 path_lookupat+0x163/0x430 fs/namei.c:2676
 filename_lookup+0x212/0x570 fs/namei.c:2705
 do_linkat+0x120/0x560 fs/namei.c:4991
 __do_sys_link fs/namei.c:5045 [inline]
 __se_sys_link fs/namei.c:5043 [inline]
 __x64_sys_link+0x82/0x90 fs/namei.c:5043
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a3a78efc9
RSP: 002b:00007f6a3b670038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007f6a3a9e6090 RCX: 00007f6a3a78efc9
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000200000000940
RBP: 00007f6a3a811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a3a9e6128 R14: 00007f6a3a9e6090 R15: 00007fff5cc5ee08
 </TASK>
INFO: task syz.4.2323:13994 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.2323      state:D stack:28904 pid:13994 tgid:13985 ppid:5830   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5254 [inline]
 __schedule+0x17c4/0x4d60 kernel/sched/core.c:6862
 __schedule_loop kernel/sched/core.c:6944 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6959
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7016
 rwsem_down_write_slowpath+0x872/0xfe0 kernel/locking/rwsem.c:1185
 __down_write_common kernel/locking/rwsem.c:1317 [inline]
 __down_write kernel/locking/rwsem.c:1326 [inline]
 down_write_nested+0x1b5/0x200 kernel/locking/rwsem.c:1707
 inode_lock_nested include/linux/fs.h:1108 [inline]
 lock_rename fs/namei.c:3360 [inline]
 do_renameat2+0x3b9/0xa50 fs/namei.c:5311
 __do_sys_rename fs/namei.c:5411 [inline]
 __se_sys_rename fs/namei.c:5409 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:5409
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a3a78efc9
RSP: 002b:00007f6a3b64f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f6a3a9e6180 RCX: 00007f6a3a78efc9
RDX: 0000000000000000 RSI: 0000200000000640 RDI: 00002000000000c0
RBP: 00007f6a3a811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a3a9e6218 R14: 00007f6a3a9e6180 R15: 00007fff5cc5ee08
 </TASK>
INFO: task syz.4.2323:13995 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.2323      state:D stack:28584 pid:13995 tgid:13985 ppid:5830   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5254 [inline]
 __schedule+0x17c4/0x4d60 kernel/sched/core.c:6862
 __schedule_loop kernel/sched/core.c:6944 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6959
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7016
 rwsem_down_write_slowpath+0x872/0xfe0 kernel/locking/rwsem.c:1185
 __down_write_common kernel/locking/rwsem.c:1317 [inline]
 __down_write kernel/locking/rwsem.c:1326 [inline]
 down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1591
 inode_lock include/linux/fs.h:1063 [inline]
 open_last_lookups fs/namei.c:3892 [inline]
 path_openat+0x8da/0x3830 fs/namei.c:4131
 do_filp_open+0x1fa/0x410 fs/namei.c:4161
 do_sys_openat2+0x121/0x1c0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1463
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a3a78efc9
RSP: 002b:00007f6a3b62e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f6a3a9e6270 RCX: 00007f6a3a78efc9
RDX: 000000000000275a RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007f6a3a811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a3a9e6308 R14: 00007f6a3a9e6270 R15: 00007fff5cc5ee08
 </TASK>
INFO: task syz.4.2323:13998 blocked for more than 145 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.2323      state:D stack:27176 pid:13998 tgid:13985 ppid:5830   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5254 [inline]
 __schedule+0x17c4/0x4d60 kernel/sched/core.c:6862
 __schedule_loop kernel/sched/core.c:6944 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6959
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7016
 rwsem_down_write_slowpath+0x872/0xfe0 kernel/locking/rwsem.c:1185
 __down_write_common kernel/locking/rwsem.c:1317 [inline]
 __down_write kernel/locking/rwsem.c:1326 [inline]
 down_write_nested+0x1b5/0x200 kernel/locking/rwsem.c:1707
 inode_lock_nested include/linux/fs.h:1108 [inline]
 filename_create+0x1f8/0x3c0 fs/namei.c:4226
 do_mkdirat+0xa0/0x590 fs/namei.c:4478
 __do_sys_mkdirat fs/namei.c:4503 [inline]
 __se_sys_mkdirat fs/namei.c:4501 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4501
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a3a78d717
RSP: 002b:00007f6a3b60ce68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f6a3b60cef0 RCX: 00007f6a3a78d717
RDX: 00000000000001ff RSI: 0000200000000100 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000200000000240 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000100
R13: 00007f6a3b60ceb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
1 lock held by ksoftirqd/0/15:
 #0: ffff8880b863a258 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:638
1 lock held by khungtaskd/31:
 #0: ffffffff8df3b360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff8df3b360 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
 #0: ffffffff8df3b360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5586:
 #0: ffff88803083b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000332e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
2 locks held by syz-executor/13744:
 #0: ffff888090f160e0 (&type->s_umount_key#73){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
 #0: ffff888090f160e0 (&type->s_umount_key#73){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
 #0: ffff888090f160e0 (&type->s_umount_key#73){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
 #1: ffffffff8df40cc0 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570 kernel/rcu/tree.c:3820
3 locks held by syz.4.2323/13986:
1 lock held by syz.4.2323/13993:
 #0: ffff888083c88ae0 (&type->i_mutex_dir_key#9){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1078 [inline]
 #0: ffff888083c88ae0 (&type->i_mutex_dir_key#9){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1832
2 locks held by syz.4.2323/13994:
 #0: ffff8880298e8420 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:498
 #1: ffff888083c88ae0 (&type->i_mutex_dir_key#9/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1108 [inline]
 #1: ffff888083c88ae0 (&type->i_mutex_dir_key#9/1){+.+.}-{4:4}, at: lock_rename fs/namei.c:3360 [inline]
 #1: ffff888083c88ae0 (&type->i_mutex_dir_key#9/1){+.+.}-{4:4}, at: do_renameat2+0x3b9/0xa50 fs/namei.c:5311
2 locks held by syz.4.2323/13995:
 #0: ffff8880298e8420 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:498
 #1: ffff888083c88ae0 (&type->i_mutex_dir_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1063 [inline]
 #1: ffff888083c88ae0 (&type->i_mutex_dir_key#9){++++}-{4:4}, at: open_last_lookups fs/namei.c:3892 [inline]
 #1: ffff888083c88ae0 (&type->i_mutex_dir_key#9){++++}-{4:4}, at: path_openat+0x8da/0x3830 fs/namei.c:4131
2 locks held by syz.4.2323/13998:
 #0: ffff8880298e8420 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:498
 #1: ffff888083c88ae0 (&type->i_mutex_dir_key#9/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1108 [inline]
 #1: ffff888083c88ae0 (&type->i_mutex_dir_key#9/1){+.+.}-{4:4}, at: filename_create+0x1f8/0x3c0 fs/namei.c:4226
2 locks held by syz-executor/14866:
 #0: ffff88823bf920e0 (&type->s_umount_key#73){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
 #0: ffff88823bf920e0 (&type->s_umount_key#73){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
 #0: ffff88823bf920e0 (&type->s_umount_key#73){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:506
 #1: ffffffff8df40cc0 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570 kernel/rcu/tree.c:3820

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
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:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:337 [inline]
 watchdog+0xfa9/0xff0 kernel/hung_task.c:500
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x52d/0xa70 arch/x86/kernel/process.c:158
 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: 5814 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:ieee80211_is_action include/linux/ieee80211.h:722 [inline]
RIP: 0010:ieee80211_drop_unencrypted_mgmt net/mac80211/rx.c:2548 [inline]
RIP: 0010:ieee80211_rx_h_mgmt_check net/mac80211/rx.c:3531 [inline]
RIP: 0010:ieee80211_rx_handlers+0x8db7/0xb7c0 net/mac80211/rx.c:4219
Code: 07 23 00 00 45 8b 36 bf 19 00 00 00 44 89 f6 e8 af 5d ef f6 41 83 fe 18 0f 87 27 01 00 00 e8 60 59 ef f6 eb 05 e8 59 59 ef f6 <0f> b7 c3 3d d0 00 00 00 75 65 48 b8 00 00 00 00 00 fc ff df 48 8b
RSP: 0018:ffffc90000007560 EFLAGS: 00000246
RAX: ffffffff8ad1959e RBX: 0000000000000080 RCX: ffff888030643d00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007810 R08: ffff88804df2c187 R09: 1ffff11009be5830
R10: dffffc0000000000 R11: ffffed1009be5831 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880433b9090 R15: 0000000000000080
FS:  0000555583550500(0000) GS:ffff888125eda000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa2db3b4198 CR3: 0000000078d38000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 ieee80211_invoke_rx_handlers net/mac80211/rx.c:4255 [inline]
 ieee80211_prepare_and_rx_handle+0x2576/0x66e0 net/mac80211/rx.c:5125
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5398 [inline]
 ieee80211_rx_list+0x266b/0x2f70 net/mac80211/rx.c:5533
 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5556
 ieee80211_rx include/net/mac80211.h:5216 [inline]
 ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453
 tasklet_action_common+0x36c/0x580 kernel/softirq.c:929
 handle_softirqs+0x286/0x870 kernel/softirq.c:626
 do_softirq+0xec/0x180 kernel/softirq.c:523
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:450
 lock_sock include/net/sock.h:1693 [inline]
 tcp_recvmsg+0x1f4/0x810 net/ipv4/tcp.c:2928
 inet_recvmsg+0x147/0x250 net/ipv4/af_inet.c:906
 sock_recvmsg_nosec net/socket.c:1082 [inline]
 sock_recvmsg+0x1a8/0x270 net/socket.c:1104
 sock_read_iter+0x231/0x2f0 net/socket.c:1174
 new_sync_read fs/read_write.c:491 [inline]
 vfs_read+0x55a/0xa30 fs/read_write.c:572
 ksys_read+0x145/0x250 fs/read_write.c:715
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd602f8d99d
Code: a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb bd e8 a8 48 00 00 0f 1f 84 00 00 00 00 00 80 3d c1 ab 22 00 00 74 17 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5b c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec
RSP: 002b:00007fff537ed6d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd602f8d99d
RDX: 0000000000000004 RSI: 00007fff537ed6ec RDI: 0000000000000003
RBP: 0000000000000000 R08: 7fffffffffffffff R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff537edb00
R13: 0000000000000004 R14: 00007fff537ed6ec R15: 00007fff537ed780
 </TASK>