./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1845308796 <...> DUID 00:04:48:c1:59:5f:fc:59:49:5e:88:a3:60:14:b2:b9:c6:dc forked to background, child pid 4667 [ 21.118709][ T4668] 8021q: adding VLAN 0 to HW filter on device bond0 [ 21.128049][ T4668] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.37' (ECDSA) to the list of known hosts. execve("./syz-executor1845308796", ["./syz-executor1845308796"], 0x7fff33390100 /* 10 vars */) = 0 brk(NULL) = 0x55555562c000 brk(0x55555562cc40) = 0x55555562cc40 arch_prctl(ARCH_SET_FS, 0x55555562c300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1845308796", 4096) = 28 brk(0x55555564dc40) = 0x55555564dc40 brk(0x55555564e000) = 0x55555564e000 mprotect(0x7fbd20f83000, 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, child_tidptr=0x55555562c5d0) = 4999 ./strace-static-x86_64: Process 4999 attached [pid 4999] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 4999] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 4999] setsid() = 1 [pid 4999] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 4999] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 4999] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 4999] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 4999] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 4999] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 4999] unshare(CLONE_NEWNS) = 0 [pid 4999] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 4999] unshare(CLONE_NEWIPC) = 0 [pid 4999] unshare(CLONE_NEWCGROUP) = 0 [pid 4999] unshare(CLONE_NEWUTS) = 0 [pid 4999] unshare(CLONE_SYSVSEM) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "16777216", 8) = 8 [pid 4999] close(3) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "536870912", 9) = 9 [pid 4999] close(3) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "1024", 4) = 4 [pid 4999] close(3) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "8192", 4) = 4 [pid 4999] close(3) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "1024", 4) = 4 [pid 4999] close(3) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "1024", 4) = 4 [pid 4999] close(3) = 0 [pid 4999] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 4999] write(3, "1024 1048576 500 1024", 21) = 21 [pid 4999] close(3) = 0 [pid 4999] getpid() = 1 [pid 4999] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<frame_sz = 131072 [ 44.518040][ T4999] WARNING: CPU: 0 PID: 4999 at net/core/filter.c:4120 bpf_xdp_adjust_tail+0x461/0x9a0 [ 44.527620][ T4999] Modules linked in: [ 44.531523][ T4999] CPU: 0 PID: 4999 Comm: syz-executor184 Not tainted 6.4.0-rc4-syzkaller #0 [ 44.540243][ T4999] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 [ 44.550376][ T4999] RIP: 0010:bpf_xdp_adjust_tail+0x461/0x9a0 [ 44.556321][ T4999] Code: ff 89 de e8 d1 80 6b f9 84 db 0f 85 59 fd ff ff e8 e4 84 6b f9 89 ee 48 c7 c7 40 ec 5e 8b c6 05 71 02 4c 06 01 e8 0f 3f 33 f9 <0f> 0b e9 38 fd ff ff e8 a3 4e be f9 e9 64 fc ff ff e8 99 4e be f9 [ 44.576039][ T4999] RSP: 0018:ffffc90003a7f8f8 EFLAGS: 00010286 [ 44.582197][ T4999] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 44.590208][ T4999] RDX: ffff88802841bb80 RSI: ffffffff814c03e7 RDI: 0000000000000001 [ 44.598208][ T4999] RBP: 0000000000020000 R08: 0000000000000001 R09: 0000000000000000 [ 44.606298][ T4999] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffffffffea [ 44.614286][ T4999] R13: ffff888075a8feef R14: 0000000000000000 R15: ffffc90003a7fab0 [ 44.622286][ T4999] FS: 000055555562c300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 44.631237][ T4999] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.637839][ T4999] CR2: 0000000020010000 CR3: 0000000026f25000 CR4: 0000000000350ef0 [ 44.645810][ T4999] Call Trace: [ 44.649116][ T4999] [ 44.652044][ T4999] ? __warn+0xe6/0x390 [ 44.656153][ T4999] ? __wake_up_klogd.part.0+0x99/0xf0 [ 44.661531][ T4999] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 44.666854][ T4999] ? report_bug+0x2da/0x500 [ 44.671371][ T4999] ? handle_bug+0x3c/0x70 [ 44.675679][ T4999] ? exc_invalid_op+0x18/0x50 [ 44.680406][ T4999] ? asm_exc_invalid_op+0x1a/0x20 [ 44.685446][ T4999] ? __warn_printk+0x187/0x310 [ 44.690242][ T4999] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 44.695538][ T4999] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 44.700975][ T4999] ? skb_free_head+0x110/0x1b0 [ 44.705756][ T4999] ? skb_headers_offset_update+0x129/0x260 [ 44.711642][ T4999] bpf_prog_4add87e5301a4105+0x1a/0x1c [ 44.717156][ T4999] bpf_prog_run_generic_xdp+0x578/0x1210 [ 44.722797][ T4999] netif_receive_generic_xdp+0x2e8/0x7d0 [ 44.728462][ T4999] do_xdp_generic+0x9a/0x1b0 [ 44.733053][ T4999] ? __netif_receive_skb_list_core+0x8f0/0x8f0 [ 44.739249][ T4999] tun_get_user+0x1bf3/0x3b00 [ 44.744025][ T4999] ? ref_tracker_alloc+0x2cf/0x580 [ 44.749176][ T4999] ? tun_build_skb+0x1230/0x1230 [ 44.754117][ T4999] ? lock_downgrade+0x690/0x690 [ 44.759024][ T4999] tun_chr_write_iter+0xdf/0x200 [ 44.763979][ T4999] vfs_write+0x945/0xd50 [ 44.768253][ T4999] ? kernel_write+0x670/0x670 [ 44.772930][ T4999] ? recalc_sigpending_tsk+0x18b/0x1d0 [ 44.778420][ T4999] ? find_held_lock+0x2d/0x110 [ 44.783188][ T4999] ? lock_downgrade+0x690/0x690 [ 44.788084][ T4999] ? __fget_light+0x20a/0x270 [ 44.792777][ T4999] ksys_write+0x12b/0x250 [ 44.797132][ T4999] ? __ia32_sys_read+0xb0/0xb0 [ 44.801895][ T4999] ? lockdep_hardirqs_on+0x7d/0x100 [ 44.807238][ T4999] ? _raw_spin_unlock_irq+0x2e/0x50 [ 44.812461][ T4999] ? ptrace_notify+0xfe/0x140 [ 44.817205][ T4999] do_syscall_64+0x39/0xb0 [ 44.821632][ T4999] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 44.827580][ T4999] RIP: 0033:0x7fbd20ed0a63 [ 44.832004][ T4999] 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 [ 44.851715][ T4999] RSP: 002b:00007ffc5a94be08 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 44.860146][ T4999] RAX: ffffffffffffffda RBX: 00007ffc5a94be30 RCX: 00007fbd20ed0a63 [ 44.868149][ T4999] RDX: 000000000000fdef RSI: 0000000020000300 RDI: 00000000000000c8 [ 44.876136][ T4999] RBP: 0000000000000003 R08: bb1414ac00000050 R09: bb1414ac00000050 [ 44.884104][ T4999] R10: bb1414ac00000050 R11: 0000000000000246 R12: 0000000000000000 [ 44.892097][ T4999] R13: 00007ffc5a94be20 R14: 00007ffc5a94be18 R15: 00007ffc5a94be14 [ 44.900096][ T4999] [ 44.903101][ T4999] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 44.910354][ T4999] CPU: 0 PID: 4999 Comm: syz-executor184 Not tainted 6.4.0-rc4-syzkaller #0 [ 44.919008][ T4999] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 [ 44.929043][ T4999] Call Trace: [ 44.932393][ T4999] [ 44.935300][ T4999] dump_stack_lvl+0xd9/0x150 [ 44.939880][ T4999] panic+0x686/0x730 [ 44.943759][ T4999] ? panic_smp_self_stop+0xa0/0xa0 [ 44.948942][ T4999] ? show_trace_log_lvl+0x284/0x390 [ 44.954136][ T4999] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 44.959413][ T4999] check_panic_on_warn+0xb1/0xc0 [ 44.964351][ T4999] __warn+0xf2/0x390 [ 44.968245][ T4999] ? __wake_up_klogd.part.0+0x99/0xf0 [ 44.973613][ T4999] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 44.978892][ T4999] report_bug+0x2da/0x500 [ 44.983228][ T4999] handle_bug+0x3c/0x70 [ 44.987371][ T4999] exc_invalid_op+0x18/0x50 [ 44.991863][ T4999] asm_exc_invalid_op+0x1a/0x20 [ 44.996708][ T4999] RIP: 0010:bpf_xdp_adjust_tail+0x461/0x9a0 [ 45.002596][ T4999] Code: ff 89 de e8 d1 80 6b f9 84 db 0f 85 59 fd ff ff e8 e4 84 6b f9 89 ee 48 c7 c7 40 ec 5e 8b c6 05 71 02 4c 06 01 e8 0f 3f 33 f9 <0f> 0b e9 38 fd ff ff e8 a3 4e be f9 e9 64 fc ff ff e8 99 4e be f9 [ 45.022300][ T4999] RSP: 0018:ffffc90003a7f8f8 EFLAGS: 00010286 [ 45.028358][ T4999] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 45.036411][ T4999] RDX: ffff88802841bb80 RSI: ffffffff814c03e7 RDI: 0000000000000001 [ 45.044375][ T4999] RBP: 0000000000020000 R08: 0000000000000001 R09: 0000000000000000 [ 45.052337][ T4999] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffffffffea [ 45.060295][ T4999] R13: ffff888075a8feef R14: 0000000000000000 R15: ffffc90003a7fab0 [ 45.068266][ T4999] ? __warn_printk+0x187/0x310 [ 45.073034][ T4999] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 45.078322][ T4999] ? skb_free_head+0x110/0x1b0 [ 45.083080][ T4999] ? skb_headers_offset_update+0x129/0x260 [ 45.088883][ T4999] bpf_prog_4add87e5301a4105+0x1a/0x1c [ 45.094332][ T4999] bpf_prog_run_generic_xdp+0x578/0x1210 [ 45.099963][ T4999] netif_receive_generic_xdp+0x2e8/0x7d0 [ 45.105610][ T4999] do_xdp_generic+0x9a/0x1b0 [ 45.110223][ T4999] ? __netif_receive_skb_list_core+0x8f0/0x8f0 [ 45.116379][ T4999] tun_get_user+0x1bf3/0x3b00 [ 45.121057][ T4999] ? ref_tracker_alloc+0x2cf/0x580 [ 45.126367][ T4999] ? tun_build_skb+0x1230/0x1230 [ 45.131296][ T4999] ? lock_downgrade+0x690/0x690 [ 45.136153][ T4999] tun_chr_write_iter+0xdf/0x200 [ 45.141085][ T4999] vfs_write+0x945/0xd50 [ 45.145315][ T4999] ? kernel_write+0x670/0x670 [ 45.149976][ T4999] ? recalc_sigpending_tsk+0x18b/0x1d0 [ 45.155430][ T4999] ? find_held_lock+0x2d/0x110 [ 45.160190][ T4999] ? lock_downgrade+0x690/0x690 [ 45.165035][ T4999] ? __fget_light+0x20a/0x270 [ 45.169717][ T4999] ksys_write+0x12b/0x250 [ 45.174037][ T4999] ? __ia32_sys_read+0xb0/0xb0 [ 45.178791][ T4999] ? lockdep_hardirqs_on+0x7d/0x100 [ 45.183983][ T4999] ? _raw_spin_unlock_irq+0x2e/0x50 [ 45.189178][ T4999] ? ptrace_notify+0xfe/0x140 [ 45.193858][ T4999] do_syscall_64+0x39/0xb0 [ 45.198270][ T4999] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 45.204160][ T4999] RIP: 0033:0x7fbd20ed0a63 [ 45.208563][ T4999] 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 [ 45.228163][ T4999] RSP: 002b:00007ffc5a94be08 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 45.236587][ T4999] RAX: ffffffffffffffda RBX: 00007ffc5a94be30 RCX: 00007fbd20ed0a63 [ 45.244551][ T4999] RDX: 000000000000fdef RSI: 0000000020000300 RDI: 00000000000000c8 [ 45.252514][ T4999] RBP: 0000000000000003 R08: bb1414ac00000050 R09: bb1414ac00000050 [ 45.260475][ T4999] R10: bb1414ac00000050 R11: 0000000000000246 R12: 0000000000000000 [ 45.268438][ T4999] R13: 00007ffc5a94be20 R14: 00007ffc5a94be18 R15: 00007ffc5a94be14 [ 45.276419][ T4999] [ 45.280137][ T4999] Kernel Offset: disabled [ 45.284508][ T4999] Rebooting in 86400 seconds..