INFO: task syz-executor.2:8971 blocked for more than 143 seconds. Not tainted 5.17.0-rc2-syzkaller-00353-g90c9e950c0de #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27088 pid: 8971 ppid: 8727 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x926/0x1080 kernel/sched/core.c:6295 schedule+0x12b/0x1f0 kernel/sched/core.c:6368 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6427 __mutex_lock_common+0xe9f/0x2490 kernel/locking/mutex.c:673 __mutex_lock kernel/locking/mutex.c:733 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:785 tty_open_by_driver drivers/tty/tty_io.c:2050 [inline] tty_open+0x235/0xdd0 drivers/tty/tty_io.c:2133 chrdev_open+0x5fb/0x680 fs/char_dev.c:414 do_dentry_open+0x78b/0x1020 fs/open.c:824 do_open fs/namei.c:3476 [inline] path_openat+0x273b/0x36a0 fs/namei.c:3609 do_filp_open+0x277/0x4f0 fs/namei.c:3636 do_sys_openat2+0x13b/0x500 fs/open.c:1214 do_sys_open fs/open.c:1230 [inline] __do_sys_openat fs/open.c:1246 [inline] __se_sys_openat fs/open.c:1241 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1241 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f708eef9f74 RSP: 002b:00007f708d8bbca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f708f059f60 RCX: 00007f708eef9f74 RDX: 0000000000000002 RSI: 00007f708d8bbd40 RDI: 00000000ffffff9c RBP: 00007f708d8bbd40 R08: 0000000000000000 R09: 000000000000000e R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007ffd3e5e49af R14: 00007f708d8bc300 R15: 0000000000022000 INFO: task syz-executor.4:9161 blocked for more than 143 seconds. Not tainted 5.17.0-rc2-syzkaller-00353-g90c9e950c0de #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:26320 pid: 9161 ppid: 8915 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x926/0x1080 kernel/sched/core.c:6295 schedule+0x12b/0x1f0 kernel/sched/core.c:6368 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6427 __mutex_lock_common+0xe9f/0x2490 kernel/locking/mutex.c:673 __mutex_lock kernel/locking/mutex.c:733 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:785 tty_open_by_driver drivers/tty/tty_io.c:2050 [inline] tty_open+0x235/0xdd0 drivers/tty/tty_io.c:2133 chrdev_open+0x5fb/0x680 fs/char_dev.c:414 do_dentry_open+0x78b/0x1020 fs/open.c:824 do_open fs/namei.c:3476 [inline] path_openat+0x273b/0x36a0 fs/namei.c:3609 do_filp_open+0x277/0x4f0 fs/namei.c:3636 do_sys_openat2+0x13b/0x500 fs/open.c:1214 do_sys_open fs/open.c:1230 [inline] __do_sys_openat fs/open.c:1246 [inline] __se_sys_openat fs/open.c:1241 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1241 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f199e7baf74 RSP: 002b:00007f199d17cca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f199e91af60 RCX: 00007f199e7baf74 RDX: 0000000000000002 RSI: 00007f199d17cd40 RDI: 00000000ffffff9c RBP: 00007f199d17cd40 R08: 0000000000000000 R09: 000000000000000e R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007fffadc9de4f R14: 00007f199d17d300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8cb1db60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by kworker/u4:5/1088: #0: ffff8880b9a39798 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:489 #1: ffff8880b9a27848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x47e/0x790 kernel/sched/psi.c:882 2 locks held by getty/3272: #0: ffff888023005098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc90002b662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2077 3 locks held by syz-executor.0/8952: 1 lock held by syz-executor.2/8971: #0: ffffffff8d203b48 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2050 [inline] #0: ffffffff8d203b48 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x235/0xdd0 drivers/tty/tty_io.c:2133 1 lock held by syz-executor.4/9161: #0: ffffffff8d203b48 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2050 [inline] #0: ffffffff8d203b48 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x235/0xdd0 drivers/tty/tty_io.c:2133 1 lock held by syz-executor.3/9913: #0: ffffffff8d203b48 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2050 [inline] #0: ffffffff8d203b48 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x235/0xdd0 drivers/tty/tty_io.c:2133 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.17.0-rc2-syzkaller-00353-g90c9e950c0de #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xc82/0xcd0 kernel/hung_task.c:369 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1088 Comm: kworker/u4:5 Not tainted 5.17.0-rc2-syzkaller-00353-g90c9e950c0de #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy7 ieee80211_iface_work RIP: 0010:debug_object_active_state+0x152/0x410 lib/debugobjects.c:931 Code: e8 03 42 80 3c 28 00 74 08 48 89 df e8 67 a8 b8 fd 48 8b 0b 48 85 c9 0f 84 02 01 00 00 4c 89 ff ff d1 48 89 c3 e9 f7 00 00 00 <48> 8d 53 10 49 89 d7 49 c1 ef 03 43 8a 04 2f 84 c0 0f 85 dc 01 00 RSP: 0018:ffffc90004c97320 EFLAGS: 00000046 RAX: 1ffffffff21dfda9 RBX: ffff888022c6e738 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc90004c97200 RBP: 0000000000000000 R08: dffffc0000000000 R09: 0000000000000003 R10: fffff52000992e41 R11: 0000000000000004 R12: ffff888022c6e750 R13: dffffc0000000000 R14: 1ffff1100458dcea R15: ffff8880738be380 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00141f000 CR3: 000000007f04f000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_rcu_head_queue kernel/rcu/rcu.h:177 [inline] kvfree_call_rcu+0xcc/0x880 kernel/rcu/tree.c:3582 cfg80211_update_known_bss+0x174/0x9a0 cfg80211_bss_update+0x17a/0x2170 net/wireless/scan.c:1708 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2464 [inline] cfg80211_inform_bss_frame_data+0x9b3/0x2010 net/wireless/scan.c:2497 ieee80211_bss_info_update+0x75b/0xbe0 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1119 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline] ieee80211_ibss_rx_queued_mgmt+0x1690/0x2b30 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline] ieee80211_iface_work+0x713/0xca0 net/mac80211/iface.c:1581 process_one_work+0x850/0x1130 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 ---------------- Code disassembly (best guess): 0: e8 03 42 80 3c callq 0x3c804208 5: 28 00 sub %al,(%rax) 7: 74 08 je 0x11 9: 48 89 df mov %rbx,%rdi c: e8 67 a8 b8 fd callq 0xfdb8a878 11: 48 8b 0b mov (%rbx),%rcx 14: 48 85 c9 test %rcx,%rcx 17: 0f 84 02 01 00 00 je 0x11f 1d: 4c 89 ff mov %r15,%rdi 20: ff d1 callq *%rcx 22: 48 89 c3 mov %rax,%rbx 25: e9 f7 00 00 00 jmpq 0x121 * 2a: 48 8d 53 10 lea 0x10(%rbx),%rdx <-- trapping instruction 2e: 49 89 d7 mov %rdx,%r15 31: 49 c1 ef 03 shr $0x3,%r15 35: 43 8a 04 2f mov (%r15,%r13,1),%al 39: 84 c0 test %al,%al 3b: 0f .byte 0xf 3c: 85 dc test %ebx,%esp 3e: 01 00 add %eax,(%rax)