./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3820697355 <...> syzkaller login: [ 15.356681][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #80!!! [ 15.846745][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #80!!! [ 15.976616][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #280!!! [ 16.763082][ T23] kauditd_printk_skb: 60 callbacks suppressed [ 16.763089][ T23] audit: type=1400 audit(1655512804.259:71): avc: denied { transition } for pid=353 comm="sshd" path="/bin/sh" dev="sda1" ino=73 scontext=system_u:system_r:initrc_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 16.792017][ T23] audit: type=1400 audit(1655512804.289:72): avc: denied { write } for pid=353 comm="sh" path="pipe:[326]" dev="pipefs" ino=326 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 17.346640][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #88!!! [ 17.355510][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #88!!! [ 17.365396][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08!!! [ 17.816565][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #80!!! Warning: Permanently added '10.128.1.39' (ECDSA) to the list of known hosts. execve("./syz-executor3820697355", ["./syz-executor3820697355"], 0x7ffe11079c30 /* 10 vars */) = 0 brk(NULL) = 0x555557330000 brk(0x555557330c40) = 0x555557330c40 arch_prctl(ARCH_SET_FS, 0x555557330300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 set_tid_address(0x5555573305d0) = 371 set_robust_list(0x5555573305e0, 24) = 0 rt_sigaction(SIGRTMIN, {sa_handler=0x7fc8f0ededc0, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7fc8f0edf490}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7fc8f0edee60, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fc8f0edf490}, NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3820697355", 4096) = 28 brk(0x555557351c40) = 0x555557351c40 brk(0x555557352000) = 0x555557352000 mprotect(0x7fc8f0f9f000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 futex(0x7fc8f0fa542c, FUTEX_WAKE_PRIVATE, 1000000) = 0 mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fc8f0eaf000 mprotect(0x7fc8f0eb0000, 131072, PROT_READ|PROT_WRITE) = 0 clone(child_stack=0x7fc8f0ecf3f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 372 attached , parent_tid=[372], tls=0x7fc8f0ecf700, child_tidptr=0x7fc8f0ecf9d0) = 372 [pid 371] futex(0x7fc8f0fa5428, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 371] futex(0x7fc8f0fa542c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 372] set_robust_list(0x7fc8f0ecf9e0, 24) = 0 [pid 372] openat(AT_FDCWD, "/dev/net/tun", O_RDONLY) = 3 [pid 372] futex(0x7fc8f0fa542c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 372] futex(0x7fc8f0fa5428, FUTEX_WAIT_PRIVATE, 0, NULL [pid 371] <... futex resumed>) = 0 [pid 371] futex(0x7fc8f0fa5428, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 372] <... futex resumed>) = 0 [pid 371] futex(0x7fc8f0fa542c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 372] ioctl(3, TUNSETIFF, 0x20000200) = 0 [pid 372] futex(0x7fc8f0fa542c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 372] futex(0x7fc8f0fa5428, FUTEX_WAIT_PRIVATE, 0, NULL [pid 371] <... futex resumed>) = 0 [pid 371] futex(0x7fc8f0fa5428, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 371] futex(0x7fc8f0fa542c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 372] <... futex resumed>) = 0 [pid 372] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 4 [pid 372] futex(0x7fc8f0fa542c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 371] <... futex resumed>) = 0 [pid 371] futex(0x7fc8f0fa5428, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 371] futex(0x7fc8f0fa542c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 372] socket(AF_PACKET, SOCK_DGRAM, htons(ETH_P_ALL)) = 5 [pid 372] futex(0x7fc8f0fa542c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 372] futex(0x7fc8f0fa5428, FUTEX_WAIT_PRIVATE, 0, NULL [pid 371] <... futex resumed>) = 0 [pid 371] futex(0x7fc8f0fa5428, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 371] futex(0x7fc8f0fa542c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 372] <... futex resumed>) = 0 [pid 372] ioctl(5, SIOCGIFINDEX, {ifr_name="rose0", ifr_ifindex=15}) = 0 [pid 372] futex(0x7fc8f0fa542c, FUTEX_WAKE_PRIVATE, 1000000 [pid 371] <... futex resumed>) = 0 [pid 371] futex(0x7fc8f0fa5428, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 371] futex(0x7fc8f0fa542c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 372] <... futex resumed>) = 1 [pid 372] ioctl(3, TUNSETQUEUE, 0x20000340) = 0 [pid 372] futex(0x7fc8f0fa542c, FUTEX_WAKE_PRIVATE, 1000000 [pid 371] <... futex resumed>) = 0 [pid 371] futex(0x7fc8f0fa5428, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 371] futex(0x7fc8f0fa542c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 372] <... futex resumed>) = 1 [ 24.519183][ T23] audit: type=1400 audit(1655512812.019:73): avc: denied { execmem } for pid=371 comm="syz-executor382" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.544985][ T23] audit: type=1400 audit(1655512812.039:74): avc: denied { create } for pid=371 comm="syz-executor382" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=packet_socket permissive=1 [pid 372] sendmsg(4, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x34\x00\x00\x00\x11\x00\x01\xe9\x0d\x7d\x1f\xc7\x4e\x1b\xed\x42\xec\x45\xb2\xfc\x0f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", iov_len=52}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0 [pid 371] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 371] futex(0x7fc8f0fa543c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 371] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fc8f0e8e000 [pid 371] mprotect(0x7fc8f0e8f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 371] clone(child_stack=0x7fc8f0eae3f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[375], tls=0x7fc8f0eae700, child_tidptr=0x7fc8f0eae9d0) = 375 [pid 371] futex(0x7fc8f0fa5438, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 371] futex(0x7fc8f0fa543c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 375 attached [pid 375] set_robust_list(0x7fc8f0eae9e0, 24) = 0 [ 24.565027][ T23] audit: type=1400 audit(1655512812.049:75): avc: denied { read } for pid=198 comm="dhcpcd" scontext=system_u:system_r:dhcpc_t tcontext=system_u:system_r:dhcpc_t tclass=netlink_kobject_uevent_socket permissive=1 [ 24.566876][ T372] netlink: 20 bytes leftover after parsing attributes in process `syz-executor382'. [ 24.586353][ T23] audit: type=1400 audit(1655512812.049:76): avc: denied { ioctl } for pid=371 comm="syz-executor382" path="socket:[441]" dev="sockfs" ino=441 ioctlcmd=0x8933 scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=packet_socket permissive=1 [ 24.622589][ T375] ------------[ cut here ]------------ [ 24.628118][ T375] WARNING: CPU: 0 PID: 375 at net/core/dev.c:6742 netif_napi_add+0x8f2/0xa20 [ 24.636873][ T375] Modules linked in: [ 24.640767][ T375] CPU: 0 PID: 375 Comm: syz-executor382 Not tainted 5.10.117-syzkaller-00814-gfdd06dc6b0f8 #0 [ 24.651046][ T375] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.661132][ T375] RIP: 0010:netif_napi_add+0x8f2/0xa20 [pid 375] ioctl(3, TUNSETIFF, 0x20000200 [pid 371] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [ 24.666855][ T375] Code: c2 e0 25 79 85 48 c7 c1 90 f0 c1 85 45 89 e8 31 c0 e8 66 97 cc 00 e9 12 fc ff ff e8 b8 d7 a8 fd e9 d5 fe ff ff e8 ae d7 a8 fd <0f> 0b eb a0 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 2e f8 ff ff e8 75 [ 24.686654][ T375] RSP: 0018:ffffc900009bfaf0 EFLAGS: 00010293 [ 24.692719][ T375] RAX: ffffffff83c3daa2 RBX: ffff88811a51c000 RCX: ffff8881067f3b40 [ 24.700831][ T375] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.708868][ T375] RBP: ffffc900009bfb40 R08: ffffffff83c3d1fc R09: ffffed10234a3886 [ 24.716886][ T375] R10: ffffed10234a3886 R11: 1ffff110234a3885 R12: ffff88811a51c428 [ 24.724847][ T375] R13: 0000000000000040 R14: ffff88811a51c418 R15: ffffffff82eee9a0 [ 24.732934][ T375] FS: 00007fc8f0eae700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 24.741886][ T375] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.748485][ T375] CR2: 00007ffd61403a58 CR3: 0000000106186000 CR4: 00000000003506b0 [ 24.756443][ T375] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [pid 371] exit_group(0) = ? [ 24.764417][ T375] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.772377][ T375] Call Trace: [ 24.775649][ T375] ? xdp_rxq_info_reg+0x194/0x2f0 [ 24.780675][ T375] tun_attach+0x877/0x14c0 [ 24.785082][ T375] tun_set_iff+0xadf/0x1100 [ 24.789586][ T375] __tun_chr_ioctl+0x8ab/0x2130 [ 24.794427][ T375] ? tun_flow_create+0x320/0x320 [ 24.799361][ T375] ? __fget_files+0x310/0x370 [ 24.804024][ T375] tun_chr_ioctl+0x2a/0x40 [ 24.808590][ T375] ? tun_chr_poll+0x650/0x650 [ 24.813273][ T375] __se_sys_ioctl+0x115/0x190 [ 24.818044][ T375] __x64_sys_ioctl+0x7b/0x90 [ 24.822617][ T375] do_syscall_64+0x34/0x70 [ 24.827042][ T375] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 24.832913][ T375] RIP: 0033:0x7fc8f0f1ce29 [ 24.837340][ T375] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 14 00 00 90 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 [ 24.856947][ T375] RSP: 002b:00007fc8f0eae308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 24.865330][ T375] RAX: ffffffffffffffda RBX: 00007fc8f0fa5438 RCX: 00007fc8f0f1ce29 [ 24.873314][ T375] RDX: 0000000020000200 RSI: 00000000400454ca RDI: 0000000000000003 [ 24.881279][ T375] RBP: 00007fc8f0fa5430 R08: 00007fc8f0eae700 R09: 0000000000000000 [ 24.889272][ T375] R10: 00007fc8f0eae700 R11: 0000000000000246 R12: 00007fc8f0fa543c [ 24.897246][ T375] R13: 00007fc8f0f73004 R14: 74656e2f7665642f R15: 0000000000022000 [ 24.905190][ T375] ---[ end trace 5cf33435a999f120 ]--- [ 24.910742][ T375] ------------[ cut here ]------------ [ 24.916177][ T375] kernel BUG at include/linux/netdevice.h:518! [ 24.922352][ T375] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 24.928397][ T375] CPU: 0 PID: 375 Comm: syz-executor382 Tainted: G W 5.10.117-syzkaller-00814-gfdd06dc6b0f8 #0 [ 24.939989][ T375] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.950031][ T375] RIP: 0010:tun_attach+0x14b3/0x14c0 [ 24.955284][ T375] Code: 89 df e8 e0 ba b7 fe e9 cf fa ff ff e8 f6 e4 7d fe 48 c7 c7 a0 12 68 86 48 89 de e8 67 7c 7b ff e9 e0 fb ff ff e8 dd e4 7d fe <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 [ 24.974857][ T375] RSP: 0018:ffffc900009bfb50 EFLAGS: 00010293 [ 24.980896][ T375] RAX: ffffffff82eecd73 RBX: 0000000000000000 RCX: ffff8881067f3b40 [ 24.988838][ T375] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 24.996778][ T375] RBP: ffffc900009bfc70 R08: ffffffff82eec175 R09: ffffed10234a3886 [ 25.004719][ T375] R10: ffffed10234a3886 R11: 1ffff110234a3885 R12: ffff88811a51c428 [ 25.012660][ T375] R13: ffff88811d70c980 R14: ffff88811d70c000 R15: dffffc0000000000 [ 25.020887][ T375] FS: 00007fc8f0eae700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 25.029785][ T375] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.036340][ T375] CR2: 00007ffd61403a58 CR3: 0000000106186000 CR4: 00000000003506b0 [ 25.044284][ T375] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.052225][ T375] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.060162][ T375] Call Trace: [ 25.063426][ T375] tun_set_iff+0xadf/0x1100 [ 25.067898][ T375] __tun_chr_ioctl+0x8ab/0x2130 [ 25.072717][ T375] ? tun_flow_create+0x320/0x320 [ 25.077640][ T375] ? __fget_files+0x310/0x370 [ 25.082287][ T375] tun_chr_ioctl+0x2a/0x40 [ 25.086683][ T375] ? tun_chr_poll+0x650/0x650 [ 25.091341][ T375] __se_sys_ioctl+0x115/0x190 [ 25.095989][ T375] __x64_sys_ioctl+0x7b/0x90 [ 25.100552][ T375] do_syscall_64+0x34/0x70 [ 25.104937][ T375] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 25.110811][ T375] RIP: 0033:0x7fc8f0f1ce29 [ 25.115197][ T375] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 14 00 00 90 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 [ 25.134769][ T375] RSP: 002b:00007fc8f0eae308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 25.143150][ T375] RAX: ffffffffffffffda RBX: 00007fc8f0fa5438 RCX: 00007fc8f0f1ce29 [ 25.151091][ T375] RDX: 0000000020000200 RSI: 00000000400454ca RDI: 0000000000000003 [ 25.159046][ T375] RBP: 00007fc8f0fa5430 R08: 00007fc8f0eae700 R09: 0000000000000000 [ 25.166990][ T375] R10: 00007fc8f0eae700 R11: 0000000000000246 R12: 00007fc8f0fa543c [ 25.174931][ T375] R13: 00007fc8f0f73004 R14: 74656e2f7665642f R15: 0000000000022000 [ 25.182873][ T375] Modules linked in: [ 25.186900][ T375] ---[ end trace 5cf33435a999f121 ]--- [ 25.192351][ T375] RIP: 0010:tun_attach+0x14b3/0x14c0 [ 25.197632][ T375] Code: 89 df e8 e0 ba b7 fe e9 cf fa ff ff e8 f6 e4 7d fe 48 c7 c7 a0 12 68 86 48 89 de e8 67 7c 7b ff e9 e0 fb ff ff e8 dd e4 7d fe <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 [ 25.217260][ T375] RSP: 0018:ffffc900009bfb50 EFLAGS: 00010293 [ 25.223331][ T375] RAX: ffffffff82eecd73 RBX: 0000000000000000 RCX: ffff8881067f3b40 [ 25.231308][ T375] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 25.239274][ T375] RBP: ffffc900009bfc70 R08: ffffffff82eec175 R09: ffffed10234a3886 [ 25.247250][ T375] R10: ffffed10234a3886 R11: 1ffff110234a3885 R12: ffff88811a51c428 [ 25.255202][ T375] R13: ffff88811d70c980 R14: ffff88811d70c000 R15: dffffc0000000000 [ 25.263177][ T375] FS: 00007fc8f0eae700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 25.272099][ T375] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.278683][ T375] CR2: 00007ffd61403a58 CR3: 0000000106186000 CR4: 00000000003506b0 [ 25.286648][ T375] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.294606][ T375] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.302600][ T375] Kernel panic - not syncing: Fatal exception [ 25.308821][ T375] Kernel Offset: disabled [ 25.313135][ T375] Rebooting in 86400 seconds..