INFO: task syz-executor.0:12364 blocked for more than 143 seconds. Not tainted 6.1.0-next-20221220-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27704 pid:12364 ppid:5123 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5244 [inline] __schedule+0x2544/0x53f0 kernel/sched/core.c:6555 schedule+0xde/0x1b0 kernel/sched/core.c:6631 io_schedule+0xbe/0x130 kernel/sched/core.c:8811 bit_wait_io+0x16/0xe0 kernel/sched/wait_bit.c:209 __wait_on_bit+0x64/0x180 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:64 wait_on_bit_io include/linux/wait_bit.h:101 [inline] __wait_on_buffer fs/buffer.c:122 [inline] wait_on_buffer include/linux/buffer_head.h:388 [inline] __bread_slow fs/buffer.c:1178 [inline] __bread_gfp+0x29e/0x330 fs/buffer.c:1370 sb_bread include/linux/buffer_head.h:341 [inline] read_super_block+0x83/0x930 fs/reiserfs/super.c:1604 reiserfs_fill_super+0x75a/0x2e90 fs/reiserfs/super.c:1959 mount_bdev+0x351/0x410 fs/super.c:1359 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x2f0 fs/super.c:1489 do_new_mount fs/namespace.c:3145 [inline] path_mount+0x132a/0x1e20 fs/namespace.c:3475 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount fs/namespace.c:3674 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f4fe468c0d9 RSP: 002b:00007f4fe31fe168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f4fe47ac120 RCX: 00007f4fe468c0d9 RDX: 00000000200003c0 RSI: 0000000020000380 RDI: 0000000020000340 RBP: 00007f4fe46e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffca58b152f R14: 00007f4fe31fe300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8c791cf0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/13: #0: ffffffff8c7919f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/28: #0: ffffffff8c792840 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x2c2 kernel/locking/lockdep.c:6494 2 locks held by getty/4751: #0: ffff88814b329098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177 3 locks held by kworker/u4:7/5622: #0: ffff8880b983b598 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:545 [inline] #0: ffff8880b983b598 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x90/0x120 kernel/sched/core.c:530 #1: ffff8880b99287c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x216/0x930 kernel/sched/psi.c:964 #2: ffff888029428158 (key#17){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:355 [inline] #2: ffff888029428158 (key#17){+...}-{2:2}, at: batadv_nc_purge_paths+0xdf/0x3a0 net/batman-adv/network-coding.c:442 1 lock held by syz-executor.0/12364: #0: ffff88803eab00e0 (&type->s_umount_key#24/1){+.+.}-{3:3}, at: alloc_super+0x22e/0xb60 fs/super.c:228 1 lock held by syz-executor.0/12442: #0: ffff88801ea919a0 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x155/0xc60 drivers/block/nbd.c:1514 2 locks held by syz-executor.0/12566: #0: ffff88801b50b190 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: mount_bdev+0x94/0x410 fs/super.c:1324 #1: ffff88803eab00e0 (&type->s_umount_key#63){+.+.}-{3:3}, at: grab_super+0x59/0x260 fs/super.c:386 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.0-next-20221220-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xc75/0xfc0 kernel/hung_task.c:377 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1069 Comm: kworker/u4:5 Not tainted 6.1.0-next-20221220-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: phy11 ieee80211_iface_work RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3725 [inline] RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3744 [inline] RIP: 0010:validate_chain kernel/locking/lockdep.c:3799 [inline] RIP: 0010:__lock_acquire+0x16ff/0x56d0 kernel/locking/lockdep.c:5055 Code: 49 be 00 00 00 00 00 fc ff df 48 89 ea 48 8b 6c 24 08 eb 06 48 83 eb 08 74 42 48 8d 7b 18 48 89 f8 48 c1 e8 03 42 80 3c 30 00 <0f> 85 75 3f 00 00 48 8b 43 18 48 39 c5 0f 84 99 f5 ff ff 48 8d 7b RSP: 0018:ffffc9000537f5e0 EFLAGS: 00000046 RAX: 1ffffffff206000b RBX: ffffffff90300040 RCX: ffffffff8163ab4e RDX: 000000000001dba7 RSI: 0000000000000008 RDI: ffffffff90300058 RBP: e77e1a189082b3c8 R08: 0000000000000000 R09: ffffffff91340ac7 R10: fffffbfff2268158 R11: 0000000000000000 R12: ffff88801feac530 R13: ffff88801feaba80 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c02357b610 CR3: 000000000c48e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire.part.0+0x11a/0x350 kernel/locking/lockdep.c:5668 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162 __debug_check_no_obj_freed lib/debugobjects.c:984 [inline] debug_check_no_obj_freed+0xcb/0x420 lib/debugobjects.c:1027 slab_free_hook mm/slub.c:1756 [inline] slab_free_freelist_hook+0xeb/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0xaf/0x3b0 mm/slub.c:3800 ieee80211_bss_info_update+0x4a2/0xaf0 net/mac80211/scan.c:223 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline] ieee80211_ibss_rx_queued_mgmt+0x1992/0x2f80 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1581 [inline] ieee80211_iface_work+0xa4d/0xd70 net/mac80211/iface.c:1635 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308