Bluetooth: hci9: command 0x041b tx timeout Bluetooth: hci9: command 0x040f tx timeout wlan1: No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge) Bluetooth: hci9: command 0x0419 tx timeout INFO: task syz-executor.4:20386 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.4 D26544 20386 8179 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 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 iterate_supers+0xdb/0x290 fs/super.c:631 ksys_sync+0x86/0x150 fs/sync.c:113 __ia32_sys_sync+0xa/0x10 fs/sync.c:124 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f71f36f60c9 Code: Bad RIP value. RSP: 002b:00007f71f1c68168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f71f3815f80 RCX: 00007f71f36f60c9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f71f3751ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd11c34f0f R14: 00007f71f1c68300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1571: #0: 000000004f5344a1 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7764: 2 locks held by kworker/u4:7/9477: #0: 000000001fff395f (&rq->lock){-.-.}, at: idle_balance kernel/sched/fair.c:9702 [inline] #0: 000000001fff395f (&rq->lock){-.-.}, at: pick_next_task_fair+0x556/0x1570 kernel/sched/fair.c:6841 #1: 000000004f5344a1 (rcu_read_lock){....}, at: cpu_of kernel/sched/sched.h:923 [inline] #1: 000000004f5344a1 (rcu_read_lock){....}, at: __update_idle_core+0x39/0x3e0 kernel/sched/fair.c:6057 1 lock held by syz-executor.2/18135: #0: 00000000369a3961 (&type->s_umount_key#91/1){+.+.}, at: alloc_super fs/super.c:226 [inline] #0: 00000000369a3961 (&type->s_umount_key#91/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519 1 lock held by syz-executor.2/18623: #0: 00000000af40c179 (&type->s_umount_key#91/1){+.+.}, at: alloc_super fs/super.c:226 [inline] #0: 00000000af40c179 (&type->s_umount_key#91/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519 1 lock held by syz-executor.4/20386: #0: 00000000369a3961 (&type->s_umount_key#92){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.4/20780: #0: 00000000369a3961 (&type->s_umount_key#92){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.4/21125: #0: 00000000369a3961 (&type->s_umount_key#92){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631 ============================================= 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 10/26/2022 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: 8061 Comm: kworker/u4:6 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: phy4 ieee80211_iface_work RIP: 0010:ieee80211_update_sta_info net/mac80211/ibss.c:1043 [inline] RIP: 0010:ieee80211_rx_bss_info net/mac80211/ibss.c:1123 [inline] RIP: 0010:ieee80211_rx_mgmt_probe_beacon+0x6c9/0x15c0 net/mac80211/ibss.c:1607 Code: 95 c3 e8 da 78 c7 f9 48 8b 85 d8 fc ff ff 48 8d b8 62 0d 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 <48> 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 c8 0e 00 00 48 8b 85 d8 RSP: 0018:ffff888093e97710 EFLAGS: 00000a06 RAX: 0000000000000000 RBX: 0000000000000f00 RCX: ffffffff879b0c8b RDX: 1ffff11008c7ee0c RSI: ffffffff879b0c96 RDI: ffff8880463f7062 RBP: ffff888093e97a68 R08: 0000000000000000 R09: 0000000000000fff R10: 0000000000000004 R11: 0000000000000000 R12: ffff8880468661c0 R13: ffff8880463f6ff0 R14: 0000000000000fff R15: 000000000000004c FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f27d3d0e020 CR3: 00000000b1688000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_ibss_rx_queued_mgmt+0xe27/0x18b0 net/mac80211/ibss.c:1634 ieee80211_iface_work+0x5c4/0x8a0 net/mac80211/iface.c:1341 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415