./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3565570809 <...> DUID 00:04:ac:03:58:10:d0:76:5c:28:30:a7:8a:8b:4a:a3:06:e2 forked to background, child pid 4670 [ 31.519424][ T4671] 8021q: adding VLAN 0 to HW filter on device bond0 [ 31.528948][ T4671] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.234' (ECDSA) to the list of known hosts. execve("./syz-executor3565570809", ["./syz-executor3565570809"], 0x7ffe580779e0 /* 10 vars */) = 0 brk(NULL) = 0x555555cf9000 brk(0x555555cf9c40) = 0x555555cf9c40 arch_prctl(ARCH_SET_FS, 0x555555cf9300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3565570809", 4096) = 28 brk(0x555555d1ac40) = 0x555555d1ac40 brk(0x555555d1b000) = 0x555555d1b000 mprotect(0x7fb51e6dd000, 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 5002 attached , child_tidptr=0x555555cf95d0) = 5002 [pid 5002] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5002] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5002] setsid() = 1 [pid 5002] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5002] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5002] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5002] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5002] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5002] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5002] unshare(CLONE_NEWNS) = 0 [pid 5002] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5002] unshare(CLONE_NEWIPC) = 0 [pid 5002] unshare(CLONE_NEWCGROUP) = 0 [pid 5002] unshare(CLONE_NEWUTS) = 0 [pid 5002] unshare(CLONE_SYSVSEM) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "16777216", 8) = 8 [pid 5002] close(3) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "536870912", 9) = 9 [pid 5002] close(3) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "1024", 4) = 4 [pid 5002] close(3) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "8192", 4) = 4 [pid 5002] close(3) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "1024", 4) = 4 [pid 5002] close(3) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "1024", 4) = 4 [pid 5002] close(3) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5002] close(3) = 0 [pid 5002] getpid() = 1 [pid 5002] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<frame_sz = 131072 [ 58.991510][ T5002] WARNING: CPU: 0 PID: 5002 at net/core/filter.c:4120 bpf_xdp_adjust_tail+0x461/0x9a0 [ 59.001095][ T5002] Modules linked in: [ 59.004976][ T5002] CPU: 0 PID: 5002 Comm: syz-executor356 Not tainted 6.3.0-next-20230428-syzkaller #0 [ 59.014537][ T5002] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 [ 59.024603][ T5002] RIP: 0010:bpf_xdp_adjust_tail+0x461/0x9a0 [ 59.030529][ T5002] Code: ff 89 de e8 21 dc 6b f9 84 db 0f 85 59 fd ff ff e8 34 e0 6b f9 89 ee 48 c7 c7 00 df 5e 8b c6 05 8b 6a 4c 06 01 e8 6f 95 33 f9 <0f> 0b e9 38 fd ff ff e8 e3 b6 be f9 e9 64 fc ff ff e8 d9 b6 be f9 [ 59.050155][ T5002] RSP: 0018:ffffc90003b1f8f8 EFLAGS: 00010286 [ 59.056213][ T5002] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 59.064211][ T5002] RDX: ffff88801f145940 RSI: ffffffff814c0497 RDI: 0000000000000001 [ 59.072208][ T5002] RBP: 0000000000020000 R08: 0000000000000001 R09: 0000000000000000 [ 59.080230][ T5002] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffffffffea [ 59.088249][ T5002] R13: ffff88807324feef R14: 0000000000000000 R15: ffffc90003b1fab0 [ 59.096226][ T5002] FS: 0000555555cf9300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 59.105204][ T5002] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.111807][ T5002] CR2: 0000000020011000 CR3: 000000007303c000 CR4: 00000000003506f0 [ 59.119809][ T5002] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.127805][ T5002] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.135782][ T5002] Call Trace: [ 59.139083][ T5002] [ 59.142005][ T5002] ? skb_free_head+0x110/0x1b0 [ 59.146763][ T5002] ? skb_headers_offset_update+0x129/0x260 [ 59.152588][ T5002] bpf_prog_4add87e5301a4105+0x1a/0x1c [ 59.158265][ T5002] bpf_prog_run_generic_xdp+0x578/0x1210 [ 59.163927][ T5002] netif_receive_generic_xdp+0x2e8/0x630 [ 59.169683][ T5002] do_xdp_generic+0x9a/0x1b0 [ 59.174298][ T5002] ? __netif_receive_skb_list_core+0x8f0/0x8f0 [ 59.180510][ T5002] tun_get_user+0x1bb9/0x39c0 [ 59.185207][ T5002] ? ref_tracker_alloc+0x2cf/0x580 [ 59.190362][ T5002] ? tun_build_skb+0x1230/0x1230 [ 59.195316][ T5002] ? lock_downgrade+0x690/0x690 [ 59.200224][ T5002] tun_chr_write_iter+0xdf/0x200 [ 59.205177][ T5002] vfs_write+0xa1d/0xe40 [ 59.209480][ T5002] ? kernel_write+0x670/0x670 [ 59.214177][ T5002] ? recalc_sigpending_tsk+0x18b/0x1d0 [ 59.219705][ T5002] ? find_held_lock+0x2d/0x110 [ 59.224502][ T5002] ? lock_downgrade+0x690/0x690 [ 59.229406][ T5002] ? __fget_light+0x20a/0x270 [ 59.234102][ T5002] ksys_write+0x12b/0x250 [ 59.238482][ T5002] ? __ia32_sys_read+0xb0/0xb0 [ 59.243283][ T5002] ? lockdep_hardirqs_on+0x7d/0x100 [ 59.248521][ T5002] ? _raw_spin_unlock_irq+0x2e/0x50 [ 59.253733][ T5002] ? ptrace_notify+0xfe/0x140 [ 59.258452][ T5002] do_syscall_64+0x39/0xb0 [ 59.262885][ T5002] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 59.268840][ T5002] RIP: 0033:0x7fb51e62ac33 [ 59.273264][ T5002] 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 [ 59.292919][ T5002] RSP: 002b:00007ffc6f136e98 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 59.301372][ T5002] RAX: ffffffffffffffda RBX: 00007ffc6f136ec0 RCX: 00007fb51e62ac33 [ 59.309389][ T5002] RDX: 000000000000fdef RSI: 0000000020001600 RDI: 00000000000000c8 [ 59.317372][ T5002] RBP: 00007ffc6f136f20 R08: 0000000000000000 R09: 0000000000000000 [ 59.325379][ T5002] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 [ 59.333393][ T5002] R13: 00007ffc6f136ed0 R14: 00007ffc6f136ef0 R15: 00007ffc6f136eb8 [ 59.341442][ T5002] [ 59.344477][ T5002] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 59.351759][ T5002] CPU: 0 PID: 5002 Comm: syz-executor356 Not tainted 6.3.0-next-20230428-syzkaller #0 [ 59.361307][ T5002] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 [ 59.371376][ T5002] Call Trace: [ 59.374654][ T5002] [ 59.377584][ T5002] dump_stack_lvl+0xd9/0x150 [ 59.382190][ T5002] panic+0x686/0x730 [ 59.386111][ T5002] ? panic_smp_self_stop+0xa0/0xa0 [ 59.391243][ T5002] ? show_trace_log_lvl+0x285/0x390 [ 59.396648][ T5002] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 59.401964][ T5002] check_panic_on_warn+0xb1/0xc0 [ 59.406925][ T5002] __warn+0xf2/0x390 [ 59.410833][ T5002] ? __wake_up_klogd.part.0+0x99/0xf0 [ 59.416222][ T5002] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 59.421524][ T5002] report_bug+0x2da/0x500 [ 59.425872][ T5002] handle_bug+0x3c/0x70 [ 59.430039][ T5002] exc_invalid_op+0x18/0x50 [ 59.434559][ T5002] asm_exc_invalid_op+0x1a/0x20 [ 59.439417][ T5002] RIP: 0010:bpf_xdp_adjust_tail+0x461/0x9a0 [ 59.445325][ T5002] Code: ff 89 de e8 21 dc 6b f9 84 db 0f 85 59 fd ff ff e8 34 e0 6b f9 89 ee 48 c7 c7 00 df 5e 8b c6 05 8b 6a 4c 06 01 e8 6f 95 33 f9 <0f> 0b e9 38 fd ff ff e8 e3 b6 be f9 e9 64 fc ff ff e8 d9 b6 be f9 [ 59.464935][ T5002] RSP: 0018:ffffc90003b1f8f8 EFLAGS: 00010286 [ 59.471004][ T5002] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 59.478983][ T5002] RDX: ffff88801f145940 RSI: ffffffff814c0497 RDI: 0000000000000001 [ 59.486974][ T5002] RBP: 0000000000020000 R08: 0000000000000001 R09: 0000000000000000 [ 59.494957][ T5002] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffffffffea [ 59.503379][ T5002] R13: ffff88807324feef R14: 0000000000000000 R15: ffffc90003b1fab0 [ 59.511366][ T5002] ? __warn_printk+0x187/0x310 [ 59.516154][ T5002] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 59.521464][ T5002] ? skb_free_head+0x110/0x1b0 [ 59.526249][ T5002] ? skb_headers_offset_update+0x129/0x260 [ 59.532071][ T5002] bpf_prog_4add87e5301a4105+0x1a/0x1c [ 59.537536][ T5002] bpf_prog_run_generic_xdp+0x578/0x1210 [ 59.543191][ T5002] netif_receive_generic_xdp+0x2e8/0x630 [ 59.548839][ T5002] do_xdp_generic+0x9a/0x1b0 [ 59.553436][ T5002] ? __netif_receive_skb_list_core+0x8f0/0x8f0 [ 59.559611][ T5002] tun_get_user+0x1bb9/0x39c0 [ 59.564305][ T5002] ? ref_tracker_alloc+0x2cf/0x580 [ 59.569436][ T5002] ? tun_build_skb+0x1230/0x1230 [ 59.574386][ T5002] ? lock_downgrade+0x690/0x690 [ 59.579265][ T5002] tun_chr_write_iter+0xdf/0x200 [ 59.584213][ T5002] vfs_write+0xa1d/0xe40 [ 59.588474][ T5002] ? kernel_write+0x670/0x670 [ 59.593160][ T5002] ? recalc_sigpending_tsk+0x18b/0x1d0 [ 59.598628][ T5002] ? find_held_lock+0x2d/0x110 [ 59.603410][ T5002] ? lock_downgrade+0x690/0x690 [ 59.608285][ T5002] ? __fget_light+0x20a/0x270 [ 59.612983][ T5002] ksys_write+0x12b/0x250 [ 59.617340][ T5002] ? __ia32_sys_read+0xb0/0xb0 [ 59.622148][ T5002] ? lockdep_hardirqs_on+0x7d/0x100 [ 59.627375][ T5002] ? _raw_spin_unlock_irq+0x2e/0x50 [ 59.632588][ T5002] ? ptrace_notify+0xfe/0x140 [ 59.637284][ T5002] do_syscall_64+0x39/0xb0 [ 59.641711][ T5002] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 59.647613][ T5002] RIP: 0033:0x7fb51e62ac33 [ 59.652039][ T5002] 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 [ 59.671656][ T5002] RSP: 002b:00007ffc6f136e98 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 59.680080][ T5002] RAX: ffffffffffffffda RBX: 00007ffc6f136ec0 RCX: 00007fb51e62ac33 [ 59.688056][ T5002] RDX: 000000000000fdef RSI: 0000000020001600 RDI: 00000000000000c8 [ 59.696036][ T5002] RBP: 00007ffc6f136f20 R08: 0000000000000000 R09: 0000000000000000 [ 59.704016][ T5002] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 [ 59.711988][ T5002] R13: 00007ffc6f136ed0 R14: 00007ffc6f136ef0 R15: 00007ffc6f136eb8 [ 59.719986][ T5002] [ 59.723219][ T5002] Kernel Offset: disabled [ 59.727652][ T5002] Rebooting in 86400 seconds..