./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2048350268 <...> [ 31.420854][ T4661] dhcpcd-run-hook (4661) used greatest stack depth: 22320 bytes left forked to background, child pid 4657 [ 33.320557][ T4658] 8021q: adding VLAN 0 to HW filter on device bond0 [ 33.330533][ T4658] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.10.2' (ECDSA) to the list of known hosts. execve("./syz-executor2048350268", ["./syz-executor2048350268"], 0x7ffff6141690 /* 10 vars */) = 0 brk(NULL) = 0x555556238000 brk(0x555556238c40) = 0x555556238c40 arch_prctl(ARCH_SET_FS, 0x555556238300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2048350268", 4096) = 28 brk(0x555556259c40) = 0x555556259c40 brk(0x55555625a000) = 0x55555625a000 mprotect(0x7f02ba610000, 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 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5080 attached , child_tidptr=0x5555562385d0) = 5080 [pid 5080] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5080] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5080] setsid() = 1 [pid 5080] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5080] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5080] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5080] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5080] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5080] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5080] unshare(CLONE_NEWNS) = 0 [pid 5080] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5080] unshare(CLONE_NEWIPC) = 0 [pid 5080] unshare(CLONE_NEWCGROUP) = 0 [pid 5080] unshare(CLONE_NEWUTS) = 0 [pid 5080] unshare(CLONE_SYSVSEM) = 0 [pid 5080] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5080] write(3, "16777216", 8) = 8 [pid 5080] close(3) = 0 [pid 5080] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5080] write(3, "536870912", 9) = 9 [pid 5080] close(3) = 0 [pid 5080] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5080] write(3, "1024", 4) = 4 [pid 5080] close(3) = 0 [pid 5080] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5080] write(3, "8192", 4) = 4 [pid 5080] close(3) = 0 [pid 5080] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5080] write(3, "1024", 4) = 4 [pid 5080] close(3) = 0 [pid 5080] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5080] write(3, "1024", 4) = 4 [pid 5080] close(3) = 0 [pid 5080] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5080] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5080] close(3) = 0 [pid 5080] getpid() = 1 [pid 5080] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<frame_sz = 131072 [ 58.952380][ T5080] WARNING: CPU: 0 PID: 5080 at net/core/filter.c:4094 bpf_xdp_adjust_tail+0x461/0x9a0 [ 58.961988][ T5080] Modules linked in: [ 58.965887][ T5080] CPU: 0 PID: 5080 Comm: syz-executor204 Not tainted 6.2.0-syzkaller-12886-g37d9df224d1e #0 [ 58.976004][ T5080] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 58.986107][ T5080] RIP: 0010:bpf_xdp_adjust_tail+0x461/0x9a0 [ 58.992065][ T5080] Code: ff 89 de e8 61 19 64 f9 84 db 0f 85 59 fd ff ff e8 44 1d 64 f9 89 ee 48 c7 c7 20 a3 5d 8b c6 05 95 00 42 06 01 e8 7f 92 2b f9 <0f> 0b e9 38 fd ff ff e8 f3 98 b5 f9 e9 64 fc ff ff e8 e9 98 b5 f9 [ 59.011730][ T5080] RSP: 0018:ffffc90003c2f8f0 EFLAGS: 00010286 [ 59.017837][ T5080] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 59.025824][ T5080] RDX: ffff88807cacba80 RSI: ffffffff814c78e7 RDI: 0000000000000001 [ 59.033848][ T5080] RBP: 0000000000020000 R08: 0000000000000001 R09: 0000000000000000 [ 59.041886][ T5080] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffffffffea [ 59.049913][ T5080] R13: ffff888079d4feef R14: 0000000000000000 R15: ffffc90003c2faa8 [ 59.057923][ T5080] FS: 0000555556238300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 59.066847][ T5080] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.073474][ T5080] CR2: 0000000020010000 CR3: 0000000075e1c000 CR4: 00000000003506f0 [ 59.081488][ T5080] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.089510][ T5080] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.097529][ T5080] Call Trace: [ 59.100804][ T5080] [ 59.103745][ T5080] ? skb_free_head+0x108/0x1a0 [ 59.108571][ T5080] ? skb_headers_offset_update+0x129/0x250 [ 59.114410][ T5080] bpf_prog_4add87e5301a4105+0x1a/0x1c [ 59.119915][ T5080] bpf_prog_run_generic_xdp+0x578/0x1210 [ 59.125582][ T5080] netif_receive_generic_xdp+0x2e8/0x940 [ 59.131276][ T5080] do_xdp_generic+0x9a/0x1b0 [ 59.135885][ T5080] ? __netif_receive_skb_list_core+0x8f0/0x8f0 [ 59.142207][ T5080] tun_get_user+0x21f0/0x3950 [ 59.146914][ T5080] ? tun_build_skb+0x1230/0x1230 [ 59.152019][ T5080] ? lock_downgrade+0x690/0x690 [ 59.157177][ T5080] tun_chr_write_iter+0xdf/0x200 [ 59.162207][ T5080] vfs_write+0x9ed/0xe10 [ 59.166459][ T5080] ? kernel_write+0x670/0x670 [ 59.171219][ T5080] ? find_held_lock+0x2d/0x110 [ 59.176012][ T5080] ? __fget_light+0x20a/0x270 [ 59.180743][ T5080] ksys_write+0x12b/0x250 [ 59.185093][ T5080] ? __ia32_sys_read+0xb0/0xb0 [ 59.189903][ T5080] ? lockdep_hardirqs_on+0x7d/0x100 [ 59.195129][ T5080] ? _raw_spin_unlock_irq+0x2e/0x50 [ 59.200371][ T5080] ? ptrace_notify+0xfe/0x140 [ 59.205084][ T5080] do_syscall_64+0x39/0xb0 [ 59.209562][ T5080] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 59.215484][ T5080] RIP: 0033:0x7f02ba55da63 [ 59.220120][ T5080] Code: 5d 41 5c 41 5d 41 5e e9 9b fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 [ 59.239793][ T5080] RSP: 002b:00007ffd8e94a068 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 59.248251][ T5080] RAX: ffffffffffffffda RBX: 00007ffd8e94a090 RCX: 00007f02ba55da63 [ 59.256244][ T5080] RDX: 000000000000fdef RSI: 0000000020000300 RDI: 00000000000000c8 [ 59.264260][ T5080] RBP: 0000000000000003 R08: bb1414ac8e94a097 R09: bb1414ac8e94a097 [ 59.272291][ T5080] R10: bb1414ac8e94a097 R11: 0000000000000246 R12: 0000000000000000 [ 59.280334][ T5080] R13: 00007ffd8e94a080 R14: 00007ffd8e94a078 R15: 00007ffd8e94a074 [ 59.288394][ T5080] [ 59.291411][ T5080] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 59.298675][ T5080] CPU: 0 PID: 5080 Comm: syz-executor204 Not tainted 6.2.0-syzkaller-12886-g37d9df224d1e #0 [ 59.308722][ T5080] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 59.318778][ T5080] Call Trace: [ 59.322059][ T5080] [ 59.324978][ T5080] dump_stack_lvl+0xd9/0x150 [ 59.329568][ T5080] panic+0x61b/0x6c0 [ 59.333454][ T5080] ? panic_smp_self_stop+0x90/0x90 [ 59.338559][ T5080] ? show_trace_log_lvl+0x285/0x390 [ 59.343760][ T5080] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 59.349054][ T5080] check_panic_on_warn+0xb1/0xc0 [ 59.353987][ T5080] __warn+0xf2/0x4f0 [ 59.357872][ T5080] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 59.363147][ T5080] report_bug+0x2da/0x500 [ 59.367505][ T5080] handle_bug+0x3c/0x70 [ 59.371650][ T5080] exc_invalid_op+0x18/0x50 [ 59.376155][ T5080] asm_exc_invalid_op+0x1a/0x20 [ 59.380998][ T5080] RIP: 0010:bpf_xdp_adjust_tail+0x461/0x9a0 [ 59.386879][ T5080] Code: ff 89 de e8 61 19 64 f9 84 db 0f 85 59 fd ff ff e8 44 1d 64 f9 89 ee 48 c7 c7 20 a3 5d 8b c6 05 95 00 42 06 01 e8 7f 92 2b f9 <0f> 0b e9 38 fd ff ff e8 f3 98 b5 f9 e9 64 fc ff ff e8 e9 98 b5 f9 [ 59.406491][ T5080] RSP: 0018:ffffc90003c2f8f0 EFLAGS: 00010286 [ 59.412548][ T5080] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 59.420528][ T5080] RDX: ffff88807cacba80 RSI: ffffffff814c78e7 RDI: 0000000000000001 [ 59.428497][ T5080] RBP: 0000000000020000 R08: 0000000000000001 R09: 0000000000000000 [ 59.436458][ T5080] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffffffffea [ 59.444417][ T5080] R13: ffff888079d4feef R14: 0000000000000000 R15: ffffc90003c2faa8 [ 59.452384][ T5080] ? __warn_printk+0x187/0x310 [ 59.457150][ T5080] ? skb_free_head+0x108/0x1a0 [ 59.461915][ T5080] ? skb_headers_offset_update+0x129/0x250 [ 59.467721][ T5080] bpf_prog_4add87e5301a4105+0x1a/0x1c [ 59.473168][ T5080] bpf_prog_run_generic_xdp+0x578/0x1210 [ 59.478803][ T5080] netif_receive_generic_xdp+0x2e8/0x940 [ 59.484434][ T5080] do_xdp_generic+0x9a/0x1b0 [ 59.489018][ T5080] ? __netif_receive_skb_list_core+0x8f0/0x8f0 [ 59.495191][ T5080] tun_get_user+0x21f0/0x3950 [ 59.499868][ T5080] ? tun_build_skb+0x1230/0x1230 [ 59.504798][ T5080] ? lock_downgrade+0x690/0x690 [ 59.509656][ T5080] tun_chr_write_iter+0xdf/0x200 [ 59.514591][ T5080] vfs_write+0x9ed/0xe10 [ 59.518827][ T5080] ? kernel_write+0x670/0x670 [ 59.523493][ T5080] ? find_held_lock+0x2d/0x110 [ 59.528249][ T5080] ? __fget_light+0x20a/0x270 [ 59.532918][ T5080] ksys_write+0x12b/0x250 [ 59.537234][ T5080] ? __ia32_sys_read+0xb0/0xb0 [ 59.541984][ T5080] ? lockdep_hardirqs_on+0x7d/0x100 [ 59.547192][ T5080] ? _raw_spin_unlock_irq+0x2e/0x50 [ 59.552423][ T5080] ? ptrace_notify+0xfe/0x140 [ 59.557124][ T5080] do_syscall_64+0x39/0xb0 [ 59.561541][ T5080] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 59.567450][ T5080] RIP: 0033:0x7f02ba55da63 [ 59.571923][ T5080] Code: 5d 41 5c 41 5d 41 5e e9 9b fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 [ 59.591526][ T5080] RSP: 002b:00007ffd8e94a068 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 59.599929][ T5080] RAX: ffffffffffffffda RBX: 00007ffd8e94a090 RCX: 00007f02ba55da63 [ 59.607889][ T5080] RDX: 000000000000fdef RSI: 0000000020000300 RDI: 00000000000000c8 [ 59.615883][ T5080] RBP: 0000000000000003 R08: bb1414ac8e94a097 R09: bb1414ac8e94a097 [ 59.623875][ T5080] R10: bb1414ac8e94a097 R11: 0000000000000246 R12: 0000000000000000 [ 59.631869][ T5080] R13: 00007ffd8e94a080 R14: 00007ffd8e94a078 R15: 00007ffd8e94a074 [ 59.639854][ T5080] [ 59.643064][ T5080] Kernel Offset: disabled [ 59.647448][ T5080] Rebooting in 86400 seconds..