Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci0: command 0x0406 tx timeout INFO: task syz-executor.2:8132 blocked for more than 140 seconds. Not tainted 4.19.171-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D24056 8132 1 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:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 xt_find_table_lock+0x3d/0x430 net/netfilter/x_tables.c:1211 xt_request_find_table_lock+0x27/0xd0 net/netfilter/x_tables.c:1258 get_info+0x12f/0x4e0 net/ipv6/netfilter/ip6_tables.c:984 do_ip6t_get_ctl+0x14e/0x910 net/ipv6/netfilter/ip6_tables.c:1708 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x1b6/0x260 net/ipv6/ipv6_sockglue.c:1388 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:3618 __sys_getsockopt+0x135/0x210 net/socket.c:1938 __do_sys_getsockopt net/socket.c:1949 [inline] __se_sys_getsockopt net/socket.c:1946 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:1946 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x460d2a Code: Bad RIP value. RSP: 002b:00007ffcd12e0b98 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffcd12e0bc0 RCX: 0000000000460d2a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 000000000074cca0 R08: 00007ffcd12e0bbc R09: 0000000000004000 R10: 00007ffcd12e0bc0 R11: 0000000000000246 R12: 00007ffcd12e0c20 R13: 0000000000000003 R14: 000000000074aae0 R15: 0000000000000029 INFO: task syz-executor.3:8134 blocked for more than 140 seconds. Not tainted 4.19.171-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D24192 8134 1 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:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 xt_find_table_lock+0x3d/0x430 net/netfilter/x_tables.c:1211 xt_request_find_table_lock+0x27/0xd0 net/netfilter/x_tables.c:1258 get_info+0x12f/0x4e0 net/ipv6/netfilter/ip6_tables.c:984 do_ip6t_get_ctl+0x14e/0x910 net/ipv6/netfilter/ip6_tables.c:1708 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x1b6/0x260 net/ipv6/ipv6_sockglue.c:1388 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:3618 __sys_getsockopt+0x135/0x210 net/socket.c:1938 __do_sys_getsockopt net/socket.c:1949 [inline] __se_sys_getsockopt net/socket.c:1946 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:1946 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x460d2a Code: Bad RIP value. RSP: 002b:00007ffed0bd3308 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffed0bd3330 RCX: 0000000000460d2a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 000000000074cca0 R08: 00007ffed0bd332c R09: 0000000000004000 R10: 00007ffed0bd3330 R11: 0000000000000246 R12: 00007ffed0bd3390 R13: 0000000000000003 R14: 000000000074aae0 R15: 0000000000000029 INFO: task syz-executor.1:4582 blocked for more than 140 seconds. Not tainted 4.19.171-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D24600 4582 1 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:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 xt_find_table_lock+0x3d/0x430 net/netfilter/x_tables.c:1211 xt_request_find_table_lock+0x27/0xd0 net/netfilter/x_tables.c:1258 get_info+0x12f/0x4e0 net/ipv6/netfilter/ip6_tables.c:984 do_ip6t_get_ctl+0x14e/0x910 net/ipv6/netfilter/ip6_tables.c:1708 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x1b6/0x260 net/ipv6/ipv6_sockglue.c:1388 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:3618 __sys_getsockopt+0x135/0x210 net/socket.c:1938 __do_sys_getsockopt net/socket.c:1949 [inline] __se_sys_getsockopt net/socket.c:1946 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:1946 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x460d2a Code: Bad RIP value. RSP: 002b:00007ffed8f6b238 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffed8f6b260 RCX: 0000000000460d2a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 000000000074cca0 R08: 00007ffed8f6b25c R09: 0000000000004000 R10: 00007ffed8f6b260 R11: 0000000000000246 R12: 00007ffed8f6b2c0 R13: 0000000000000003 R14: 000000000074aae0 R15: 0000000000000029 INFO: task syz-executor.5:6449 blocked for more than 140 seconds. Not tainted 4.19.171-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D24184 6449 1 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:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 xt_find_table_lock+0x3d/0x430 net/netfilter/x_tables.c:1211 xt_request_find_table_lock+0x27/0xd0 net/netfilter/x_tables.c:1258 get_info+0x12f/0x4e0 net/ipv6/netfilter/ip6_tables.c:984 do_ip6t_get_ctl+0x14e/0x910 net/ipv6/netfilter/ip6_tables.c:1708 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x1b6/0x260 net/ipv6/ipv6_sockglue.c:1388 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:3618 __sys_getsockopt+0x135/0x210 net/socket.c:1938 __do_sys_getsockopt net/socket.c:1949 [inline] __se_sys_getsockopt net/socket.c:1946 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:1946 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x460d2a Code: Bad RIP value. RSP: 002b:00007fffc6f7b058 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007fffc6f7b080 RCX: 0000000000460d2a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 000000000074cca0 R08: 00007fffc6f7b07c R09: 0000000000004000 R10: 00007fffc6f7b080 R11: 0000000000000246 R12: 00007fffc6f7b0e0 R13: 0000000000000003 R14: 000000000074aae0 R15: 0000000000000029 INFO: task syz-executor.0:20101 blocked for more than 140 seconds. Not tainted 4.19.171-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D24192 20101 1 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:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 xt_find_table_lock+0x3d/0x430 net/netfilter/x_tables.c:1211 xt_request_find_table_lock+0x27/0xd0 net/netfilter/x_tables.c:1258 get_info+0x12f/0x4e0 net/ipv6/netfilter/ip6_tables.c:984 do_ip6t_get_ctl+0x14e/0x910 net/ipv6/netfilter/ip6_tables.c:1708 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x1b6/0x260 net/ipv6/ipv6_sockglue.c:1388 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:3618 __sys_getsockopt+0x135/0x210 net/socket.c:1938 __do_sys_getsockopt net/socket.c:1949 [inline] __se_sys_getsockopt net/socket.c:1946 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:1946 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x460d2a Code: Bad RIP value. RSP: 002b:00007ffe90e429c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffe90e429f0 RCX: 0000000000460d2a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 000000000074cca0 R08: 00007ffe90e429ec R09: 0000000000004000 R10: 00007ffe90e429f0 R11: 0000000000000246 R12: 00007ffe90e42a50 R13: 0000000000000003 R14: 000000000074aae0 R15: 0000000000000029 INFO: task syz-executor.4:20694 blocked for more than 140 seconds. Not tainted 4.19.171-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D24160 20694 1 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 exp_funnel_lock kernel/rcu/tree_exp.h:320 [inline] _synchronize_rcu_expedited+0x60c/0x6f0 kernel/rcu/tree_exp.h:667 synchronize_rcu+0xc6/0x160 kernel/rcu/tree_plugin.h:818 xt_replace_table+0x2ff/0x640 net/netfilter/x_tables.c:1394 __do_replace+0x1d7/0x870 net/ipv6/netfilter/ip6_tables.c:1087 do_replace net/ipv6/netfilter/ip6_tables.c:1160 [inline] do_ip6t_set_ctl+0x2d2/0x430 net/ipv6/netfilter/ip6_tables.c:1684 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x6f/0xc0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x103/0x160 net/ipv6/ipv6_sockglue.c:945 tcp_setsockopt+0x86/0xd0 net/ipv4/tcp.c:3097 __sys_setsockopt+0x14d/0x240 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:1909 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x460d4a Code: Bad RIP value. RSP: 002b:00007ffdffd1a2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ffdffd1a2e0 RCX: 0000000000460d4a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 000000000074cca0 R08: 00000000000002e8 R09: 0000000000004000 R10: 000000000074bf80 R11: 0000000000000206 R12: 00007ffdffd1a340 R13: 0000000000000003 R14: 000000000074bf20 R15: 0000000000000029 Showing all locks held in the system: 1 lock held by khungtaskd/1566: #0: 00000000d3aa1254 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440 1 lock held by in:imklog/7805: #0: 00000000f49c6720 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-executor.2/8132: #0: 00000000e4e74b71 (&xt[i].mutex){+.+.}, at: xt_find_table_lock+0x3d/0x430 net/netfilter/x_tables.c:1211 1 lock held by syz-executor.3/8134: #0: 00000000e4e74b71 (&xt[i].mutex){+.+.}, at: xt_find_table_lock+0x3d/0x430 net/netfilter/x_tables.c:1211 2 locks held by login/20050: #0: 00000000a51bea02 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000002cf569da (&tty->atomic_write_lock){+.+.}, at: tty_write_lock drivers/tty/tty_io.c:886 [inline] #1: 000000002cf569da (&tty->atomic_write_lock){+.+.}, at: do_tty_write drivers/tty/tty_io.c:909 [inline] #1: 000000002cf569da (&tty->atomic_write_lock){+.+.}, at: tty_write+0x24e/0x810 drivers/tty/tty_io.c:1044 1 lock held by syz-executor.1/4582: #0: 00000000e4e74b71 (&xt[i].mutex){+.+.}, at: xt_find_table_lock+0x3d/0x430 net/netfilter/x_tables.c:1211 1 lock held by syz-executor.5/6449: #0: 00000000e4e74b71 (&xt[i].mutex){+.+.}, at: xt_find_table_lock+0x3d/0x430 net/netfilter/x_tables.c:1211 1 lock held by syz-executor.0/20101: #0: 00000000e4e74b71 (&xt[i].mutex){+.+.}, at: xt_find_table_lock+0x3d/0x430 net/netfilter/x_tables.c:1211 1 lock held by syz-executor.4/20694: #0: 00000000e4e74b71 (&xt[i].mutex){+.+.}, at: xt_find_table_lock+0x3d/0x430 net/netfilter/x_tables.c:1211 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1566 Comm: khungtaskd Not tainted 4.19.171-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 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60