Bluetooth: hci4: command 0x0406 tx timeout watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.4:14451] Modules linked in: irq event stamp: 84506 hardirqs last enabled at (84505): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (84506): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (84502): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (84239): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (84239): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 14451 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_pc+0x27/0x50 kernel/kcov.c:104 Code: 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 83 fa 02 75 20 <48> 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48 83 c2 01 48 39 RSP: 0018:ffff88809238f108 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff8880abb443c0 RBX: 0000000000000000 RCX: ffffffff8101cfdb RDX: 0000000000000002 RSI: ffffffff8101cfe9 RDI: 0000000000000007 RBP: ffff888044cbd718 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000007 R11: ffffffff8c66505b R12: 00000255a5c6d082 R13: ffff888044cbd540 R14: ffff888044cbd540 R15: ffffed1008997ae3 FS: 00007f8894fd2700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020fcb000 CR3: 00000000530fc000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rdtsc_ordered arch/x86/include/asm/msr.h:231 [inline] msr_read_counter arch/x86/events/msr.c:195 [inline] msr_event_update+0x109/0x270 arch/x86/events/msr.c:208 perf_output_read_group kernel/events/core.c:6215 [inline] perf_output_read+0xeb6/0x1270 kernel/events/core.c:6254 perf_output_sample+0xc1b/0x18f0 kernel/events/core.c:6296 __perf_event_output kernel/events/core.c:6621 [inline] perf_event_output_forward+0x12f/0x270 kernel/events/core.c:6634 __perf_event_overflow+0x13c/0x370 kernel/events/core.c:7907 perf_swevent_overflow kernel/events/core.c:7983 [inline] perf_swevent_event+0x347/0x550 kernel/events/core.c:8011 do_perf_sw_event kernel/events/core.c:8124 [inline] ___perf_sw_event+0x309/0x570 kernel/events/core.c:8155 __perf_sw_event+0x58/0x120 kernel/events/core.c:8167 perf_sw_event include/linux/perf_event.h:1074 [inline] __do_page_fault+0x80e/0xd60 arch/x86/mm/fault.c:1453 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:181 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 0f 1f 80 00 00 00 00 0f 01 cb 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 01 ca c3 66 2e 0f 1f 84 00 00 00 00 00 0f 01 cb 83 RSP: 0018:ffff88809238fa50 EFLAGS: 00050206 RAX: ffffed101287eea0 RBX: 0000000000007500 RCX: 0000000000001fcb RDX: 0000000000007500 RSI: 0000000020fcb000 RDI: ffff8880943f5535 RBP: 0000000020fc5acb R08: 0000000000000001 R09: ffffed101287ee9f R10: ffff8880943f74ff R11: 0000000000000000 R12: ffff8880943f0000 R13: 0000000020fccfcb R14: 00007ffffffff000 R15: 0000000000000000 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:71 [inline] copyin+0xcd/0xf0 lib/iov_iter.c:146 _copy_from_iter_full+0x1df/0x7c0 lib/iov_iter.c:724 copy_from_iter_full include/linux/uio.h:124 [inline] skb_do_copy_data_nocache include/net/sock.h:1971 [inline] skb_copy_to_page_nocache include/net/sock.h:1997 [inline] tcp_sendmsg_locked+0x126b/0x2f60 net/ipv4/tcp.c:1364 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1462 inet_sendmsg+0x132/0x5a0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 __sys_sendto+0x21a/0x320 net/socket.c:1899 __do_sys_sendto net/socket.c:1911 [inline] __se_sys_sendto net/socket.c:1907 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1907 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f889665d109 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8894fd2168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f889676ff60 RCX: 00007f889665d109 RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000006 RBP: 00007f88966b70ad R08: 0000000000000000 R09: 0000000000000053 R10: 0000000040000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe8ea2810f R14: 00007f8894fd2300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10332 Comm: kworker/u4:8 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:__sanitizer_cov_trace_pc+0x47/0x50 kernel/kcov.c:111 Code: 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 0f 1f 84 00 00 00 00 00 49 89 f1 49 89 fa 65 48 8b 34 25 c0 df RSP: 0018:ffff88809d077be8 EFLAGS: 00000093 RAX: ffff88808bf8a5c0 RBX: 0000000000000000 RCX: ffffffff8167ada7 RDX: 0000000000000000 RSI: ffffffff8167adb0 RDI: 0000000000000005 RBP: ffffffff87d8bc2d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff88808bf8a5c0 R13: ffffffff87d8d930 R14: 0000000000000027 R15: ffff8880560da080 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f22c8bff000 CR3: 00000000b33d4000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_hardirqs_off+0x50/0x200 kernel/trace/trace_preemptirq.c:40 __local_bh_enable_ip+0x119/0x270 kernel/softirq.c:171 spin_unlock_bh include/linux/spinlock.h:374 [inline] batadv_nc_purge_paths+0x22d/0x310 net/batman-adv/network-coding.c:482 batadv_nc_worker+0x731/0xd50 net/batman-adv/network-coding.c:733 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 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 48 8b 34 24 mov (%rsp),%rsi 7: 65 48 8b 04 25 c0 df mov %gs:0x1dfc0,%rax e: 01 00 10: 65 8b 15 cc 59 9f 7e mov %gs:0x7e9f59cc(%rip),%edx # 0x7e9f59e3 17: 81 e2 00 01 1f 00 and $0x1f0100,%edx 1d: 75 2b jne 0x4a 1f: 8b 90 60 13 00 00 mov 0x1360(%rax),%edx 25: 83 fa 02 cmp $0x2,%edx 28: 75 20 jne 0x4a * 2a: 48 8b 88 68 13 00 00 mov 0x1368(%rax),%rcx <-- trapping instruction 31: 8b 80 64 13 00 00 mov 0x1364(%rax),%eax 37: 48 8b 11 mov (%rcx),%rdx 3a: 48 83 c2 01 add $0x1,%rdx 3e: 48 rex.W 3f: 39 .byte 0x39