./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3514529692 <...> DUID 00:04:b0:7e:30:9f:4d:11:81:da:bf:2d:3d:77:4c:17:c1:ba forked to background, child pid 4671 [ 49.500537][ T4672] 8021q: adding VLAN 0 to HW filter on device bond0 [ 49.510717][ T4672] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.238' (ECDSA) to the list of known hosts. execve("./syz-executor3514529692", ["./syz-executor3514529692"], 0x7ffddb209c50 /* 10 vars */) = 0 brk(NULL) = 0x555556700000 brk(0x555556700c40) = 0x555556700c40 arch_prctl(ARCH_SET_FS, 0x555556700300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3514529692", 4096) = 28 brk(0x555556721c40) = 0x555556721c40 brk(0x555556722000) = 0x555556722000 mprotect(0x7fb10a0eb000, 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=0x5555567005d0) = 5008 ./strace-static-x86_64: Process 5008 attached [pid 5008] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5008] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5008] setsid() = 1 [pid 5008] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5008] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5008] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5008] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5008] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5008] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5008] unshare(CLONE_NEWNS) = 0 [pid 5008] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5008] unshare(CLONE_NEWIPC) = 0 [pid 5008] unshare(CLONE_NEWCGROUP) = 0 [pid 5008] unshare(CLONE_NEWUTS) = 0 [pid 5008] unshare(CLONE_SYSVSEM) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "16777216", 8) = 8 [pid 5008] close(3) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "536870912", 9) = 9 [pid 5008] close(3) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "1024", 4) = 4 [pid 5008] close(3) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "8192", 4) = 4 [pid 5008] close(3) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "1024", 4) = 4 [pid 5008] close(3) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "1024", 4) = 4 [pid 5008] close(3) = 0 [pid 5008] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5008] close(3) = 0 [pid 5008] getpid() = 1 [pid 5008] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<frame_sz = 131072 [ 78.302674][ T5008] WARNING: CPU: 0 PID: 5008 at net/core/filter.c:4120 bpf_xdp_adjust_tail+0x461/0x9a0 [ 78.312353][ T5008] Modules linked in: [ 78.316333][ T5008] CPU: 0 PID: 5008 Comm: syz-executor351 Not tainted 6.4.0-rc6-syzkaller-01310-ga52305a81d6b #0 [ 78.326841][ T5008] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 78.337001][ T5008] RIP: 0010:bpf_xdp_adjust_tail+0x461/0x9a0 [ 78.342942][ T5008] Code: ff 89 de e8 c1 aa 6a f9 84 db 0f 85 59 fd ff ff e8 d4 ae 6a f9 89 ee 48 c7 c7 60 04 5f 8b c6 05 b1 72 4b 06 01 e8 0f 6a 32 f9 <0f> 0b e9 38 fd ff ff e8 63 ac bd f9 e9 64 fc ff ff e8 59 ac bd f9 [ 78.362714][ T5008] RSP: 0018:ffffc90003b8f8f8 EFLAGS: 00010286 [ 78.368915][ T5008] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 78.376979][ T5008] RDX: ffff8880270c1dc0 RSI: ffffffff814c03b7 RDI: 0000000000000001 [ 78.385039][ T5008] RBP: 0000000000020000 R08: 0000000000000001 R09: 0000000000000000 [ 78.393129][ T5008] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffffffffea [ 78.401176][ T5008] R13: ffff888071fefeef R14: 0000000000000000 R15: ffffc90003b8fab0 [ 78.409335][ T5008] FS: 0000555556700300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 78.418346][ T5008] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.424964][ T5008] CR2: 0000000020010000 CR3: 0000000071e6c000 CR4: 00000000003506f0 [ 78.433096][ T5008] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.441157][ T5008] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.449205][ T5008] Call Trace: [ 78.452506][ T5008] [ 78.455506][ T5008] ? __warn+0xe6/0x390 [ 78.459642][ T5008] ? __wake_up_klogd.part.0+0x99/0xf0 [ 78.465044][ T5008] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 78.470447][ T5008] ? report_bug+0x2da/0x500 [ 78.474976][ T5008] ? handle_bug+0x3c/0x70 [ 78.479386][ T5008] ? exc_invalid_op+0x18/0x50 [ 78.484109][ T5008] ? asm_exc_invalid_op+0x1a/0x20 [ 78.489281][ T5008] ? __warn_printk+0x187/0x310 [ 78.494127][ T5008] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 78.499573][ T5008] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 78.504930][ T5008] ? skb_free_head+0x110/0x1b0 [ 78.509773][ T5008] ? skb_headers_offset_update+0x129/0x260 [ 78.515693][ T5008] bpf_prog_4add87e5301a4105+0x1a/0x1c [ 78.521204][ T5008] bpf_prog_run_generic_xdp+0x578/0x1210 [ 78.526937][ T5008] netif_receive_generic_xdp+0x2e8/0x7d0 [ 78.532638][ T5008] do_xdp_generic+0x9a/0x1b0 [ 78.537304][ T5008] ? __netif_receive_skb_list_core+0x8f0/0x8f0 [ 78.543519][ T5008] tun_get_user+0x1bf3/0x3b00 [ 78.548288][ T5008] ? ref_tracker_alloc+0x2d5/0x580 [ 78.553465][ T5008] ? tun_build_skb+0x1230/0x1230 [ 78.558495][ T5008] ? lock_downgrade+0x690/0x690 [ 78.563415][ T5008] tun_chr_write_iter+0xdf/0x200 [ 78.568442][ T5008] vfs_write+0x945/0xd50 [ 78.572725][ T5008] ? kernel_write+0x670/0x670 [ 78.577479][ T5008] ? recalc_sigpending_tsk+0x18b/0x1d0 [ 78.582992][ T5008] ? find_held_lock+0x2d/0x110 [ 78.587840][ T5008] ? lock_downgrade+0x690/0x690 [ 78.592742][ T5008] ? __fget_light+0x20a/0x270 [ 78.597510][ T5008] ksys_write+0x12b/0x250 [ 78.601963][ T5008] ? __ia32_sys_read+0xb0/0xb0 [ 78.606798][ T5008] ? lockdep_hardirqs_on+0x7d/0x100 [ 78.612044][ T5008] ? _raw_spin_unlock_irq+0x2e/0x50 [ 78.617404][ T5008] ? ptrace_notify+0xfe/0x140 [ 78.622154][ T5008] do_syscall_64+0x39/0xb0 [ 78.626690][ T5008] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 78.632648][ T5008] RIP: 0033:0x7fb10a038be3 [ 78.637146][ T5008] 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 [ 78.656853][ T5008] RSP: 002b:00007fff56fbb4b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 78.665347][ T5008] RAX: ffffffffffffffda RBX: 00007fff56fbb4e0 RCX: 00007fb10a038be3 [ 78.673356][ T5008] RDX: 000000000000fdef RSI: 0000000020000580 RDI: 00000000000000c8 [ 78.681409][ T5008] RBP: 0000000000000003 R08: bb1414ac56fbb4e7 R09: bb1414ac56fbb4e7 [ 78.689466][ T5008] R10: bb1414ac56fbb4e7 R11: 0000000000000246 R12: 0000000000000000 [ 78.697599][ T5008] R13: 00007fff56fbb4d0 R14: 00007fff56fbb4c8 R15: 00007fff56fbb4c4 [ 78.705678][ T5008] [ 78.708712][ T5008] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 78.716001][ T5008] CPU: 0 PID: 5008 Comm: syz-executor351 Not tainted 6.4.0-rc6-syzkaller-01310-ga52305a81d6b #0 [ 78.726423][ T5008] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 78.736503][ T5008] Call Trace: [ 78.739787][ T5008] [ 78.742725][ T5008] dump_stack_lvl+0xd9/0x150 [ 78.747335][ T5008] panic+0x686/0x730 [ 78.751266][ T5008] ? panic_smp_self_stop+0xa0/0xa0 [ 78.756400][ T5008] ? show_trace_log_lvl+0x284/0x390 [ 78.761636][ T5008] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 78.766968][ T5008] check_panic_on_warn+0xb1/0xc0 [ 78.771951][ T5008] __warn+0xf2/0x390 [ 78.775880][ T5008] ? __wake_up_klogd.part.0+0x99/0xf0 [ 78.781292][ T5008] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 78.786616][ T5008] report_bug+0x2da/0x500 [ 78.790982][ T5008] handle_bug+0x3c/0x70 [ 78.795165][ T5008] exc_invalid_op+0x18/0x50 [ 78.799707][ T5008] asm_exc_invalid_op+0x1a/0x20 [ 78.804583][ T5008] RIP: 0010:bpf_xdp_adjust_tail+0x461/0x9a0 [ 78.810516][ T5008] Code: ff 89 de e8 c1 aa 6a f9 84 db 0f 85 59 fd ff ff e8 d4 ae 6a f9 89 ee 48 c7 c7 60 04 5f 8b c6 05 b1 72 4b 06 01 e8 0f 6a 32 f9 <0f> 0b e9 38 fd ff ff e8 63 ac bd f9 e9 64 fc ff ff e8 59 ac bd f9 [ 78.830153][ T5008] RSP: 0018:ffffc90003b8f8f8 EFLAGS: 00010286 [ 78.836263][ T5008] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 78.844250][ T5008] RDX: ffff8880270c1dc0 RSI: ffffffff814c03b7 RDI: 0000000000000001 [ 78.852248][ T5008] RBP: 0000000000020000 R08: 0000000000000001 R09: 0000000000000000 [ 78.860239][ T5008] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffffffffea [ 78.868234][ T5008] R13: ffff888071fefeef R14: 0000000000000000 R15: ffffc90003b8fab0 [ 78.876277][ T5008] ? __warn_printk+0x187/0x310 [ 78.881092][ T5008] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 78.886420][ T5008] ? skb_free_head+0x110/0x1b0 [ 78.891212][ T5008] ? skb_headers_offset_update+0x129/0x260 [ 78.897058][ T5008] bpf_prog_4add87e5301a4105+0x1a/0x1c [ 78.902543][ T5008] bpf_prog_run_generic_xdp+0x578/0x1210 [ 78.908225][ T5008] netif_receive_generic_xdp+0x2e8/0x7d0 [ 78.913913][ T5008] do_xdp_generic+0x9a/0x1b0 [ 78.918540][ T5008] ? __netif_receive_skb_list_core+0x8f0/0x8f0 [ 78.924742][ T5008] tun_get_user+0x1bf3/0x3b00 [ 78.929460][ T5008] ? ref_tracker_alloc+0x2d5/0x580 [ 78.934618][ T5008] ? tun_build_skb+0x1230/0x1230 [ 78.939595][ T5008] ? lock_downgrade+0x690/0x690 [ 78.944507][ T5008] tun_chr_write_iter+0xdf/0x200 [ 78.949479][ T5008] vfs_write+0x945/0xd50 [ 78.953754][ T5008] ? kernel_write+0x670/0x670 [ 78.958455][ T5008] ? recalc_sigpending_tsk+0x18b/0x1d0 [ 78.963948][ T5008] ? find_held_lock+0x2d/0x110 [ 78.968752][ T5008] ? lock_downgrade+0x690/0x690 [ 78.973642][ T5008] ? __fget_light+0x20a/0x270 [ 78.978367][ T5008] ksys_write+0x12b/0x250 [ 78.982729][ T5008] ? __ia32_sys_read+0xb0/0xb0 [ 78.987515][ T5008] ? lockdep_hardirqs_on+0x7d/0x100 [ 78.992756][ T5008] ? _raw_spin_unlock_irq+0x2e/0x50 [ 78.998005][ T5008] ? ptrace_notify+0xfe/0x140 [ 79.002721][ T5008] do_syscall_64+0x39/0xb0 [ 79.007169][ T5008] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 79.013110][ T5008] RIP: 0033:0x7fb10a038be3 [ 79.017555][ T5008] 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 [ 79.037193][ T5008] RSP: 002b:00007fff56fbb4b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 79.045631][ T5008] RAX: ffffffffffffffda RBX: 00007fff56fbb4e0 RCX: 00007fb10a038be3 [ 79.053627][ T5008] RDX: 000000000000fdef RSI: 0000000020000580 RDI: 00000000000000c8 [ 79.061621][ T5008] RBP: 0000000000000003 R08: bb1414ac56fbb4e7 R09: bb1414ac56fbb4e7 [ 79.069621][ T5008] R10: bb1414ac56fbb4e7 R11: 0000000000000246 R12: 0000000000000000 [ 79.077615][ T5008] R13: 00007fff56fbb4d0 R14: 00007fff56fbb4c8 R15: 00007fff56fbb4c4 [ 79.085628][ T5008] [ 79.088868][ T5008] Kernel Offset: disabled [ 79.093319][ T5008] Rebooting in 86400 seconds..