Bluetooth: hci1: command 0x0405 tx timeout INFO: task syz-executor.0:8105 blocked for more than 140 seconds. Not tainted 4.19.172-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D23712 8105 1 0x00000004 Call Trace: context_switch syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3517 schedule+0x8d/0x1b0 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3561 exp_funnel_lock syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree_exp.h:320 [inline] _synchronize_rcu_expedited+0x60c/0x6f0 syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree_exp.h:667 synchronize_rcu+0xc6/0x160 syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree_plugin.h:818 xt_replace_table+0x2ff/0x640 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1394 __do_replace+0x1d7/0x870 syzkaller/managers/linux-4-19/kernel/net/ipv6/netfilter/ip6_tables.c:1087 do_replace syzkaller/managers/linux-4-19/kernel/net/ipv6/netfilter/ip6_tables.c:1160 [inline] do_ip6t_set_ctl+0x2d2/0x430 syzkaller/managers/linux-4-19/kernel/net/ipv6/netfilter/ip6_tables.c:1684 nf_sockopt syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x6f/0xc0 syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x103/0x160 syzkaller/managers/linux-4-19/kernel/net/ipv6/ipv6_sockglue.c:945 tcp_setsockopt+0x86/0xd0 syzkaller/managers/linux-4-19/kernel/net/ipv4/tcp.c:3097 __sys_setsockopt+0x14d/0x240 syzkaller/managers/linux-4-19/kernel/net/socket.c:1901 __do_sys_setsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1912 [inline] __se_sys_setsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1909 [inline] __x64_sys_setsockopt+0xba/0x150 syzkaller/managers/linux-4-19/kernel/net/socket.c:1909 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x46714a Code: 49 81 f8 e9 00 00 00 0f 84 5d fa ff ff e9 5c fa ff ff 48 89 4c 24 50 e8 84 6b 00 00 48 8b 04 24 48 8b 8c 24 d8 00 00 00 48 8d <34> 01 48 85 f6 48 b8 ff ff ff ff ff ff ff 7f 48 0f 4e f0 48 8b 84 RSP: 002b:00007fff461c17d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 000000000046714a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 00007fff461c1800 R08: 0000000000000488 R09: 0079746972756365 R10: 000000000053b260 R11: 0000000000000206 R12: 00007fff461c1860 R13: 0000000000000003 R14: 00007fff461c17fc R15: 000000000053b200 INFO: task syz-executor.2:8109 blocked for more than 140 seconds. Not tainted 4.19.172-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D24368 8109 1 0x00000004 Call Trace: context_switch syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3517 schedule+0x8d/0x1b0 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3619 __mutex_lock_common syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1072 xt_find_table_lock+0x3d/0x430 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1211 xt_request_find_table_lock+0x27/0xd0 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1258 get_info+0x12f/0x4e0 syzkaller/managers/linux-4-19/kernel/net/ipv6/netfilter/ip6_tables.c:984 do_ip6t_get_ctl+0x14e/0x910 syzkaller/managers/linux-4-19/kernel/net/ipv6/netfilter/ip6_tables.c:1708 nf_sockopt syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x72/0xd0 syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x1b6/0x260 syzkaller/managers/linux-4-19/kernel/net/ipv6/ipv6_sockglue.c:1388 tcp_getsockopt+0x86/0xd0 syzkaller/managers/linux-4-19/kernel/net/ipv4/tcp.c:3618 __sys_getsockopt+0x135/0x210 syzkaller/managers/linux-4-19/kernel/net/socket.c:1938 __do_sys_getsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1949 [inline] __se_sys_getsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1946 [inline] __x64_sys_getsockopt+0xba/0x150 syzkaller/managers/linux-4-19/kernel/net/socket.c:1946 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x46711a Code: 53 00 00 eb ac e8 a6 53 00 00 e9 60 ff ff ff 45 31 c0 e9 b0 fa ff ff 49 81 f8 e9 00 00 00 0f 84 84 fa ff ff e9 86 fa ff ff 0f <1f> 80 00 00 00 00 49 81 f8 e9 00 00 00 0f 84 5d fa ff ff e9 5c fa RSP: 002b:00007ffe1d807668 EFLAGS: 00000202 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 000000000046711a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 00007ffe1d807690 R08: 00007ffe1d80768c R09: 0079746972756365 R10: 00007ffe1d807690 R11: 0000000000000202 R12: 0000000000000032 R13: 0000000000000003 R14: 00007ffe1d80768c R15: 000000000053ab40 INFO: task syz-executor.4:8113 blocked for more than 140 seconds. Not tainted 4.19.172-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D24216 8113 1 0x00000004 Call Trace: context_switch syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3517 schedule+0x8d/0x1b0 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3619 __mutex_lock_common syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1072 xt_find_table_lock+0x3d/0x430 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1211 xt_request_find_table_lock+0x27/0xd0 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1258 get_info+0x12f/0x4e0 syzkaller/managers/linux-4-19/kernel/net/ipv6/netfilter/ip6_tables.c:984 do_ip6t_get_ctl+0x14e/0x910 syzkaller/managers/linux-4-19/kernel/net/ipv6/netfilter/ip6_tables.c:1708 nf_sockopt syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x72/0xd0 syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x1b6/0x260 syzkaller/managers/linux-4-19/kernel/net/ipv6/ipv6_sockglue.c:1388 tcp_getsockopt+0x86/0xd0 syzkaller/managers/linux-4-19/kernel/net/ipv4/tcp.c:3618 __sys_getsockopt+0x135/0x210 syzkaller/managers/linux-4-19/kernel/net/socket.c:1938 __do_sys_getsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1949 [inline] __se_sys_getsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1946 [inline] __x64_sys_getsockopt+0xba/0x150 syzkaller/managers/linux-4-19/kernel/net/socket.c:1946 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x46711a Code: 53 00 00 eb ac e8 a6 53 00 00 e9 60 ff ff ff 45 31 c0 e9 b0 fa ff ff 49 81 f8 e9 00 00 00 0f 84 84 fa ff ff e9 86 fa ff ff 0f <1f> 80 00 00 00 00 49 81 f8 e9 00 00 00 0f 84 5d fa ff ff e9 5c fa RSP: 002b:00007ffc5a1a2a78 EFLAGS: 00000202 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 000000000046711a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 00007ffc5a1a2aa0 R08: 00007ffc5a1a2a9c R09: 0079746972756365 R10: 00007ffc5a1a2aa0 R11: 0000000000000202 R12: 0000000000000032 R13: 0000000000000003 R14: 00007ffc5a1a2a9c R15: 000000000053ab40 INFO: task syz-executor.5:8115 blocked for more than 140 seconds. Not tainted 4.19.172-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D24368 8115 1 0x00000004 Call Trace: context_switch syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3517 schedule+0x8d/0x1b0 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3619 __mutex_lock_common syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1072 xt_find_table_lock+0x3d/0x430 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1211 xt_request_find_table_lock+0x27/0xd0 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1258 get_info+0x12f/0x4e0 syzkaller/managers/linux-4-19/kernel/net/ipv6/netfilter/ip6_tables.c:984 do_ip6t_get_ctl+0x14e/0x910 syzkaller/managers/linux-4-19/kernel/net/ipv6/netfilter/ip6_tables.c:1708 nf_sockopt syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x72/0xd0 syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x1b6/0x260 syzkaller/managers/linux-4-19/kernel/net/ipv6/ipv6_sockglue.c:1388 tcp_getsockopt+0x86/0xd0 syzkaller/managers/linux-4-19/kernel/net/ipv4/tcp.c:3618 __sys_getsockopt+0x135/0x210 syzkaller/managers/linux-4-19/kernel/net/socket.c:1938 __do_sys_getsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1949 [inline] __se_sys_getsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1946 [inline] __x64_sys_getsockopt+0xba/0x150 syzkaller/managers/linux-4-19/kernel/net/socket.c:1946 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x46711a Code: 53 00 00 eb ac e8 a6 53 00 00 e9 60 ff ff ff 45 31 c0 e9 b0 fa ff ff 49 81 f8 e9 00 00 00 0f 84 84 fa ff ff e9 86 fa ff ff 0f <1f> 80 00 00 00 00 49 81 f8 e9 00 00 00 0f 84 5d fa ff ff e9 5c fa RSP: 002b:00007ffd76cd19e8 EFLAGS: 00000202 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 000000000046711a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 00007ffd76cd1a10 R08: 00007ffd76cd1a0c R09: 0079746972756365 R10: 00007ffd76cd1a10 R11: 0000000000000202 R12: 0000000000000032 R13: 0000000000000003 R14: 00007ffd76cd1a0c R15: 000000000053ab40 INFO: task syz-executor.3:11684 blocked for more than 140 seconds. Not tainted 4.19.172-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D24216 11684 1 0x00000004 Call Trace: context_switch syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3517 schedule+0x8d/0x1b0 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3619 __mutex_lock_common syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1072 xt_find_table_lock+0x3d/0x430 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1211 xt_request_find_table_lock+0x27/0xd0 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1258 get_info+0x12f/0x4e0 syzkaller/managers/linux-4-19/kernel/net/ipv6/netfilter/ip6_tables.c:984 do_ip6t_get_ctl+0x14e/0x910 syzkaller/managers/linux-4-19/kernel/net/ipv6/netfilter/ip6_tables.c:1708 nf_sockopt syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x72/0xd0 syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x1b6/0x260 syzkaller/managers/linux-4-19/kernel/net/ipv6/ipv6_sockglue.c:1388 tcp_getsockopt+0x86/0xd0 syzkaller/managers/linux-4-19/kernel/net/ipv4/tcp.c:3618 __sys_getsockopt+0x135/0x210 syzkaller/managers/linux-4-19/kernel/net/socket.c:1938 __do_sys_getsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1949 [inline] __se_sys_getsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1946 [inline] __x64_sys_getsockopt+0xba/0x150 syzkaller/managers/linux-4-19/kernel/net/socket.c:1946 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x46711a Code: 53 00 00 eb ac e8 a6 53 00 00 e9 60 ff ff ff 45 31 c0 e9 b0 fa ff ff 49 81 f8 e9 00 00 00 0f 84 84 fa ff ff e9 86 fa ff ff 0f <1f> 80 00 00 00 00 49 81 f8 e9 00 00 00 0f 84 5d fa ff ff e9 5c fa RSP: 002b:00007fff8f55d228 EFLAGS: 00000202 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 000000000046711a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 00007fff8f55d250 R08: 00007fff8f55d24c R09: 0079746972756365 R10: 00007fff8f55d250 R11: 0000000000000202 R12: 0000000000000032 R13: 0000000000000003 R14: 00007fff8f55d24c R15: 000000000053ab40 INFO: task syz-executor.1:12202 blocked for more than 140 seconds. Not tainted 4.19.172-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D24368 12202 1 0x00000004 Call Trace: context_switch syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3517 schedule+0x8d/0x1b0 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3619 __mutex_lock_common syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 syzkaller/managers/linux-4-19/kernel/kernel/locking/mutex.c:1072 xt_find_table_lock+0x3d/0x430 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1211 xt_request_find_table_lock+0x27/0xd0 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1258 get_info+0x12f/0x4e0 syzkaller/managers/linux-4-19/kernel/net/ipv6/netfilter/ip6_tables.c:984 do_ip6t_get_ctl+0x14e/0x910 syzkaller/managers/linux-4-19/kernel/net/ipv6/netfilter/ip6_tables.c:1708 nf_sockopt syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x72/0xd0 syzkaller/managers/linux-4-19/kernel/net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x1b6/0x260 syzkaller/managers/linux-4-19/kernel/net/ipv6/ipv6_sockglue.c:1388 tcp_getsockopt+0x86/0xd0 syzkaller/managers/linux-4-19/kernel/net/ipv4/tcp.c:3618 __sys_getsockopt+0x135/0x210 syzkaller/managers/linux-4-19/kernel/net/socket.c:1938 __do_sys_getsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1949 [inline] __se_sys_getsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1946 [inline] __x64_sys_getsockopt+0xba/0x150 syzkaller/managers/linux-4-19/kernel/net/socket.c:1946 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x46711a Code: 53 00 00 eb ac e8 a6 53 00 00 e9 60 ff ff ff 45 31 c0 e9 b0 fa ff ff 49 81 f8 e9 00 00 00 0f 84 84 fa ff ff e9 86 fa ff ff 0f <1f> 80 00 00 00 00 49 81 f8 e9 00 00 00 0f 84 5d fa ff ff e9 5c fa RSP: 002b:00007fff7a574458 EFLAGS: 00000202 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 000000000046711a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 00007fff7a574480 R08: 00007fff7a57447c R09: 0079746972756365 R10: 00007fff7a574480 R11: 0000000000000202 R12: 0000000000000032 R13: 0000000000000003 R14: 00007fff7a57447c R15: 000000000053ab40 Showing all locks held in the system: 1 lock held by khungtaskd/1567: #0: 000000003902f2f6 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 syzkaller/managers/linux-4-19/kernel/kernel/locking/lockdep.c:4440 1 lock held by syz-executor.0/8105: #0: 00000000523c2cde (&xt[i].mutex){+.+.}, at: xt_find_table_lock+0x3d/0x430 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1211 1 lock held by syz-executor.2/8109: #0: 00000000523c2cde (&xt[i].mutex){+.+.}, at: xt_find_table_lock+0x3d/0x430 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1211 1 lock held by syz-executor.4/8113: #0: 00000000523c2cde (&xt[i].mutex){+.+.}, at: xt_find_table_lock+0x3d/0x430 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1211 1 lock held by syz-executor.5/8115: #0: 00000000523c2cde (&xt[i].mutex){+.+.}, at: xt_find_table_lock+0x3d/0x430 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1211 1 lock held by syz-executor.3/11684: #0: 00000000523c2cde (&xt[i].mutex){+.+.}, at: xt_find_table_lock+0x3d/0x430 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1211 1 lock held by syz-executor.1/12202: #0: 00000000523c2cde (&xt[i].mutex){+.+.}, at: xt_find_table_lock+0x3d/0x430 syzkaller/managers/linux-4-19/kernel/net/netfilter/x_tables.c:1211 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1567 Comm: khungtaskd Not tainted 4.19.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 syzkaller/managers/linux-4-19/kernel/lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 syzkaller/managers/linux-4-19/kernel/lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace syzkaller/managers/linux-4-19/kernel/./include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks syzkaller/managers/linux-4-19/kernel/kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 syzkaller/managers/linux-4-19/kernel/kernel/hung_task.c:287 kthread+0x33f/0x460 syzkaller/managers/linux-4-19/kernel/kernel/kthread.c:259 ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4692 Comm: systemd-journal Not tainted 4.19.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:do_syscall_64+0x37e/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:297 Code: fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e d4 01 00 00 83 63 08 f9 0f 1f 44 00 00 e8 29 e0 61 00 0f 00 2d 02 e4 5f 07 <48> 83 c4 08 5b 5d 41 5c 41 5d e9 13 e0 61 00 e8 0e e0 61 00 48 b8 RSP: 0018:ffff8880a096ff28 EFLAGS: 000000d3 RAX: ffff8880a0962580 RBX: ffff8880a0962580 RCX: ffffffff81007956 RDX: 0000000000000000 RSI: ffffffff81007997 RDI: ffff8880a0962588 RBP: ffff8880a096ff58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000100 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fb35ef208c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb35c211020 CR3: 00000000a1296000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb35e1b9f17 Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 RSP: 002b:00007ffe55fa2fc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027 RAX: 0000000000001254 RBX: 000055bd792ca1e0 RCX: 00007fb35e1b9f17 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055bd792ca1e0 RBP: 00007ffe55fa30c0 R08: 00007ffe55ff6000 R09: 0000008f57908cb2 R10: 0014d51ab532f084 R11: 0000000000000202 R12: 0000000000001254 R13: 00007fb35ec23147 R14: 0000000000000000 R15: 0005babde2e380cc