INFO: task syz-executor.4:5107 blocked for more than 143 seconds. Not tainted 6.2.0-rc6-syzkaller-00050-g9f266ccaa2f5 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:18552 pid:5107 ppid:1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0x995/0xe20 kernel/sched/core.c:6606 schedule+0xcb/0x190 kernel/sched/core.c:6682 io_schedule+0x83/0x100 kernel/sched/core.c:8868 bit_wait_io+0xe/0xc0 kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0xbb/0x1a0 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x1c3/0x240 kernel/sched/wait_bit.c:117 lock_buffer include/linux/buffer_head.h:397 [inline] hfs_mdb_commit+0xacd/0xf80 fs/hfs/mdb.c:325 hfs_sync_fs+0x11/0x20 fs/hfs/super.c:35 sync_filesystem+0xe8/0x220 fs/sync.c:56 generic_shutdown_super+0x6b/0x310 fs/super.c:474 kill_block_super+0x79/0xd0 fs/super.c:1386 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 cleanup_mnt+0x494/0x520 fs/namespace.c:1291 task_work_run+0x243/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f46c528d537 RSP: 002b:00007ffdfd5afda8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f46c528d537 RDX: 00007ffdfd5afe7b RSI: 000000000000000a RDI: 00007ffdfd5afe70 RBP: 00007ffdfd5afe70 R08: 00000000ffffffff R09: 00007ffdfd5afc40 R10: 00005555564cb8b3 R11: 0000000000000246 R12: 00007f46c52e6b24 R13: 00007ffdfd5b0f30 R14: 00005555564cb810 R15: 00007ffdfd5b0f70 INFO: task kworker/1:8:5159 blocked for more than 143 seconds. Not tainted 6.2.0-rc6-syzkaller-00050-g9f266ccaa2f5 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:8 state:D stack:20984 pid:5159 ppid:2 flags:0x00004000 Workqueue: events_long flush_mdb Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0x995/0xe20 kernel/sched/core.c:6606 schedule+0xcb/0x190 kernel/sched/core.c:6682 io_schedule+0x83/0x100 kernel/sched/core.c:8868 bit_wait_io+0xe/0xc0 kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0xbb/0x1a0 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x1c3/0x240 kernel/sched/wait_bit.c:117 lock_buffer include/linux/buffer_head.h:397 [inline] hfs_mdb_commit+0x115/0xf80 fs/hfs/mdb.c:271 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8d326f10 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/13: #0: ffffffff8d327710 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/28: #0: ffffffff8d326d40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/4752: #0: ffff888027dad098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177 1 lock held by syz-executor.4/5107: #0: ffff8880380de0e0 (&type->s_umount_key#56){++++}-{3:3}, at: deactivate_super+0x96/0xd0 fs/super.c:362 2 locks held by kworker/1:8/5159: #0: ffff888012871538 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0 #1: ffffc9000530fd00 ((work_completion)(&(&sbi->mdb_work)->work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc6-syzkaller-00050-g9f266ccaa2f5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46f/0x4f0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1ba/0x420 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+0xcd5/0xd20 kernel/hung_task.c:377 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 35 Comm: kworker/u4:2 Not tainted 6.2.0-rc6-syzkaller-00050-g9f266ccaa2f5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: phy9 ieee80211_iface_work RIP: 0010:__sanitizer_cov_trace_switch+0xf1/0x100 kernel/kcov.c:341 Code: 00 00 48 89 d8 48 83 c8 08 4c 89 04 01 48 89 d8 48 83 c8 10 4c 89 34 01 48 83 cb 18 48 89 3c 19 4e 89 4c f9 20 e9 5f ff ff ff <5b> 41 5e 41 5f c3 66 0f 1f 84 00 00 00 00 00 c7 87 48 15 00 00 00 RSP: 0018:ffffc90000ac7348 EFLAGS: 00000246 RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff8e6e9470 RDI: 0000000000000000 RBP: 0000000000000028 R08: 0000000000000005 R09: ffffffff8a11226c R10: 0000000000000002 R11: ffff8880179ed7c0 R12: 0000000000000028 R13: ffff88802d680074 R14: 0000000000000004 R15: 1ffff11004a4a6c7 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0007ed5e4 CR3: 000000000d08e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cfg80211_get_ies_channel_number+0x2c/0x8e0 net/wireless/scan.c:1818 cfg80211_get_bss_channel net/wireless/scan.c:1880 [inline] cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2438 [inline] cfg80211_inform_bss_frame_data+0x371/0x2230 net/wireless/scan.c:2525 ieee80211_bss_info_update+0x74f/0x1020 net/mac80211/scan.c:190 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+0x1945/0x2c40 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1583 [inline] ieee80211_iface_work+0x773/0xcf0 net/mac80211/iface.c:1637 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308