INFO: task syz-executor:4900 blocked for more than 143 seconds. Not tainted 5.15.178-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:20792 pid: 4900 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5027 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373 schedule+0x11b/0x1f0 kernel/sched/core.c:6456 rwsem_down_write_slowpath+0xf0c/0x16a0 kernel/locking/rwsem.c:1165 deactivate_super+0xa9/0xe0 fs/super.c:365 cleanup_mnt+0x44e/0x500 fs/namespace.c:1143 task_work_run+0x129/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f457c126117 RSP: 002b:00007ffd492add08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007f457c1a608c RCX: 00007f457c126117 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd492addc0 RBP: 00007ffd492addc0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd492aee50 R13: 00007f457c1a608c R14: 000000000001cd05 R15: 00007ffd492aee90 INFO: task syz.3.19:5298 blocked for more than 143 seconds. Not tainted 5.15.178-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.19 state:D stack:22904 pid: 5298 ppid: 4913 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5027 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373 schedule+0x11b/0x1f0 kernel/sched/core.c:6456 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6515 rwsem_down_read_slowpath+0x605/0xb40 kernel/locking/rwsem.c:1055 __down_read_common kernel/locking/rwsem.c:1239 [inline] __down_read kernel/locking/rwsem.c:1252 [inline] down_read+0x9a/0x2e0 kernel/locking/rwsem.c:1500 iterate_supers+0xac/0x1e0 fs/super.c:716 quota_sync_all fs/quota/quota.c:68 [inline] __do_sys_quotactl fs/quota/quota.c:936 [inline] __se_sys_quotactl+0x347/0x770 fs/quota/quota.c:915 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f7d07697de9 RSP: 002b:00007f7d06909038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3 RAX: ffffffffffffffda RBX: 00007f7d078b0fa0 RCX: 00007f7d07697de9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101 RBP: 00007f7d077192a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f7d078b0fa0 R15: 00007ffcfe2c41a8 INFO: task syz.2.18:5305 blocked for more than 143 seconds. Not tainted 5.15.178-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.18 state:D stack:26368 pid: 5305 ppid: 4906 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5027 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373 schedule+0x11b/0x1f0 kernel/sched/core.c:6456 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6515 rwsem_down_read_slowpath+0x605/0xb40 kernel/locking/rwsem.c:1055 __down_read_common kernel/locking/rwsem.c:1239 [inline] __down_read kernel/locking/rwsem.c:1252 [inline] down_read+0x9a/0x2e0 kernel/locking/rwsem.c:1500 iterate_supers+0xac/0x1e0 fs/super.c:716 quota_sync_all fs/quota/quota.c:68 [inline] __do_sys_quotactl fs/quota/quota.c:936 [inline] __se_sys_quotactl+0x347/0x770 fs/quota/quota.c:915 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f1fd58b6de9 RSP: 002b:00007f1fd4b28038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3 RAX: ffffffffffffffda RBX: 00007f1fd5acffa0 RCX: 00007f1fd58b6de9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000101 RBP: 00007f1fd59382a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f1fd5acffa0 R15: 00007ffc36c786d8 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8cb1fce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 3 locks held by kworker/u4:5/3091: 2 locks held by getty/3930: #0: ffff88802a8fd098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc900025ae2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158 3 locks held by kworker/0:11/4257: #0: ffff88802b862d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283 #1: ffffc9000312fd20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285 #2: ffffffff8dc42788 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xcc/0x1720 net/ipv6/addrconf.c:4113 3 locks held by kworker/1:5/4273: #0: ffff88802b862d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283 #1: ffffc900031afd20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285 #2: ffffffff8dc42788 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xcc/0x1720 net/ipv6/addrconf.c:4113 1 lock held by syz-executor/4900: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:365 2 locks held by syz.4.26/5195: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 #1: ffffc900039f90f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline] #1: ffffc900039f90f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline] #1: ffffc900039f90f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_begin_r+0x34e/0x1000 fs/reiserfs/journal.c:3045 4 locks held by syz.1.27/5199: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 #1: ffffc900039f90f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline] #1: ffffc900039f90f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline] #1: ffffc900039f90f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x372/0x4650 fs/reiserfs/journal.c:4025 #2: ffff8880b8e3a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475 #3: ffff8880b8e27848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x53d/0x810 kernel/sched/psi.c:891 1 lock held by syz.3.19/5298: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.2.18/5305: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.5.29/5712: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.6.30/5728: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.7.31/5733: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.8.32/5757: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.9.33/5761: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.1.34/5795: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.4.35/5819: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.0.36/5831: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.2.37/5842: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.3.38/5845: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.5.39/5867: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.6.40/5891: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.7.41/5915: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.9.43/5952: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.8.42/5958: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.1.44/5973: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.4.45/5997: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.0.46/6004: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.2.47/6032: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.3.48/6045: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.5.49/6067: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.6.50/6093: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.7.51/6113: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.9.52/6141: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.8.53/6163: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.1.54/6180: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.4.55/6198: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz.0.56/6210: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 1 lock held by syz-executor/6216: #0: ffffffff8dc42788 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8dc42788 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x94c/0xee0 net/core/rtnetlink.c:5644 1 lock held by syz.2.57/6230: #0: ffff888055bbc0e0 (&type->s_umount_key#72){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:716 2 locks held by syz-executor/6231: #0: ffffffff8dc42788 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8dc42788 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x94c/0xee0 net/core/rtnetlink.c:5644 #1: ffffffff8cb242a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8cb242a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x280/0x740 kernel/rcu/tree_exp.h:845 1 lock held by syz-executor/6245: #0: ffffffff8dc42788 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8dc42788 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x94c/0xee0 net/core/rtnetlink.c:5644 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xe72/0xeb0 kernel/hung_task.c:295 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: phy12 ieee80211_iface_work RIP: 0010:ieee80211_sta_get_rates+0x3a9/0x6b0 net/mac80211/util.c:2134 Code: 48 89 d8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28 84 c0 0f 85 e4 00 00 00 0f b7 03 03 44 24 44 99 f7 7c 24 68 <89> c3 89 c7 8b 6c 24 1c 89 ee e8 b8 9f a7 f7 39 eb 4c 8b 74 24 08 RSP: 0018:ffffc90000ce7910 EFLAGS: 00000206 RAX: 000000000000003c RBX: ffff888023f45e84 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000000000f0 R08: ffffffff89d8e6f1 R09: fffffbfff1c150ee R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff888023f45e50 R15: 0000000000000004 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdb8a024440 CR3: 0000000020624000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_update_sta_info net/mac80211/ibss.c:1007 [inline] ieee80211_rx_bss_info net/mac80211/ibss.c:1121 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1614 [inline] ieee80211_ibss_rx_queued_mgmt+0xf6f/0x2af0 net/mac80211/ibss.c:1643 ieee80211_iface_process_skb net/mac80211/iface.c:1456 [inline] ieee80211_iface_work+0x78f/0xcc0 net/mac80211/iface.c:1510 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287