wlan1: No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge) wlan1: No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge) ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 INFO: task syz-executor.0:32412 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28624 32412 30595 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078 device_lock include/linux/device.h:1174 [inline] usbdev_release+0x83/0x420 drivers/usb/core/devio.c:1049 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f668f5f272b Code: Bad RIP value. RSP: 002b:00007ffdac1e6bb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f668f5f272b RDX: 0000000000000000 RSI: ffffffff8167abaa RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2be21e58 R10: 0000000000001a0c R11: 0000000000000293 R12: 00007f668f753b60 R13: 00007f668f753b60 R14: 00007f668f752f60 R15: 0000000000094e74 Showing all locks held in the system: 5 locks held by kworker/1:1/53: #0: 00000000494358b9 ((wq_completion)"usb_hub_wq"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 0000000079e6e138 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000737ebe89 (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline] #2: 00000000737ebe89 (&dev->mutex){....}, at: hub_event+0x11e/0x44a0 drivers/usb/core/hub.c:5387 #3: 0000000013984f88 (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2983 [inline] #3: 0000000013984f88 (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5069 [inline] #3: 0000000013984f88 (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5253 [inline] #3: 0000000013984f88 (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5361 [inline] #3: 0000000013984f88 (&port_dev->status_lock){+.+.}, at: hub_event+0x1cb8/0x44a0 drivers/usb/core/hub.c:5441 #4: 0000000089c5c40a (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1b9/0x3120 drivers/usb/core/hub.c:4578 1 lock held by khungtaskd/1571: #0: 0000000039ba64f6 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7823: 2 locks held by rs:main Q:Reg/7824: #0: 00000000f6755753 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 #1: 00000000f247742b (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #1: 00000000f247742b (sb_writers#3){.+.+}, at: vfs_write+0x463/0x540 fs/read_write.c:548 2 locks held by agetty/7827: #0: 00000000feabe972 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000f6a3b24f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1950 drivers/tty/n_tty.c:2154 1 lock held by syz-executor.0/32412: #0: 00000000737ebe89 (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline] #0: 00000000737ebe89 (&dev->mutex){....}, at: usbdev_release+0x83/0x420 drivers/usb/core/devio.c:1049 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7824 Comm: rs:main Q:Reg Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:atomic_try_cmpxchg include/asm-generic/atomic-instrumented.h:72 [inline] RIP: 0010:atomic_fetch_add_unless include/linux/atomic.h:580 [inline] RIP: 0010:atomic_add_unless include/linux/atomic.h:597 [inline] RIP: 0010:page_ref_add_unless include/linux/page_ref.h:157 [inline] RIP: 0010:get_page_unless_zero include/linux/mm.h:531 [inline] RIP: 0010:page_cache_get_speculative include/linux/pagemap.h:186 [inline] RIP: 0010:find_get_entry+0xeb/0x8a0 mm/filemap.c:1471 Code: 09 31 ff 89 de e8 a5 3f e6 ff 84 db 0f 84 ba 04 00 00 e8 68 3e e6 ff 48 8d 45 08 49 bf 00 00 00 00 00 fc ff df 48 89 44 24 08 <48> 8d 44 24 58 48 89 44 24 28 e8 46 3e e6 ff 48 8b 74 24 10 48 8b RSP: 0018:ffff8880a350f820 EFLAGS: 00000293 RAX: ffff88808fb71440 RBX: 0000000000000001 RCX: ffffffff817c4bd2 RDX: 0000000000000000 RSI: ffffffff817c4708 RDI: 0000000000000001 RBP: ffff88808fb71438 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 000000000000000e R13: dffffc0000000000 R14: ffff88808fb71438 R15: dffffc0000000000 FS: 00007efee5cbf700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb040392000 CR3: 00000000a9c42000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pagecache_get_page+0x56/0xd50 mm/filemap.c:1564 grab_cache_page_write_begin+0x6a/0xa0 mm/filemap.c:3120 ext4_da_write_begin+0x2ba/0x10e0 fs/ext4/inode.c:3075 generic_perform_write+0x1f8/0x4d0 mm/filemap.c:3170 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295 ext4_file_write_iter+0x2fe/0xf20 fs/ext4/file.c:272 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7efee87031cd Code: c2 20 00 00 75 10 b8 01 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ae fc ff ff 48 89 04 24 b8 01 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 f7 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007efee5cbe590 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007efedc023fb0 RCX: 00007efee87031cd RDX: 0000000000000786 RSI: 00007efedc023fb0 RDI: 0000000000000006 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007efedc023d30 R13: 00007efee5cbe5b0 R14: 000055c6e1cc8360 R15: 0000000000000786 ---------------- Code disassembly (best guess): 0: 09 31 or %esi,(%rcx) 2: ff 89 de e8 a5 3f decl 0x3fa5e8de(%rcx) 8: e6 ff out %al,$0xff a: 84 db test %bl,%bl c: 0f 84 ba 04 00 00 je 0x4cc 12: e8 68 3e e6 ff callq 0xffe63e7f 17: 48 8d 45 08 lea 0x8(%rbp),%rax 1b: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 22: fc ff df 25: 48 89 44 24 08 mov %rax,0x8(%rsp) * 2a: 48 8d 44 24 58 lea 0x58(%rsp),%rax <-- trapping instruction 2f: 48 89 44 24 28 mov %rax,0x28(%rsp) 34: e8 46 3e e6 ff callq 0xffe63e7f 39: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 3e: 48 rex.W 3f: 8b .byte 0x8b