Bluetooth: hci11: command 0x041b tx timeout Bluetooth: hci11: command 0x040f tx timeout Bluetooth: hci11: command 0x0419 tx timeout ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 INFO: task syz-executor.0:10747 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 D27512 10747 6563 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 drop_caches_sysctl_handler+0xdb/0x110 fs/drop_caches.c:61 proc_sys_call_handler.isra.0+0x1f3/0x3b0 fs/proc/proc_sysctl.c:597 __vfs_write+0xf7/0x770 fs/read_write.c:485 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: 0033:0x7f2cd0e250c9 Code: Bad RIP value. RSP: 002b:00007f2ccf397168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f2cd0f44f80 RCX: 00007f2cd0e250c9 RDX: 0000000000000001 RSI: 0000000020000300 RDI: 0000000000000006 RBP: 00007f2cd0e80ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff2389a86f R14: 00007f2ccf397300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 00000000d09f953e (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7801: 2 locks held by kworker/u4:4/15350: 1 lock held by syz-executor.0/23036: #0: 00000000815dc86e (&type->s_umount_key#65/1){+.+.}, at: alloc_super fs/super.c:226 [inline] #0: 00000000815dc86e (&type->s_umount_key#65/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519 1 lock held by syz-executor.0/23467: #0: 00000000af5903f6 (&type->s_umount_key#65/1){+.+.}, at: alloc_super fs/super.c:226 [inline] #0: 00000000af5903f6 (&type->s_umount_key#65/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519 1 lock held by syz-executor.0/23821: #0: 0000000015e97490 (&type->s_umount_key#65/1){+.+.}, at: alloc_super fs/super.c:226 [inline] #0: 0000000015e97490 (&type->s_umount_key#65/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519 3 locks held by syz-executor.0/10747: #0: 00000000b5d97a75 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 #1: 0000000098c1e07f (sb_writers#4){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #1: 0000000098c1e07f (sb_writers#4){.+.+}, at: vfs_write+0x463/0x540 fs/read_write.c:548 #2: 00000000815dc86e (&type->s_umount_key#66){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 3 locks held by syz-executor.0/11235: #0: 000000004a3da866 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 #1: 0000000098c1e07f (sb_writers#4){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #1: 0000000098c1e07f (sb_writers#4){.+.+}, at: vfs_write+0x463/0x540 fs/read_write.c:548 #2: 00000000815dc86e (&type->s_umount_key#66){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 3 locks held by syz-executor.0/11606: #0: 00000000c8077a20 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 #1: 0000000098c1e07f (sb_writers#4){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #1: 0000000098c1e07f (sb_writers#4){.+.+}, at: vfs_write+0x463/0x540 fs/read_write.c:548 #2: 00000000815dc86e (&type->s_umount_key#66){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 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 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60