./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor167810666 <...> Warning: Permanently added '10.128.1.156' (ECDSA) to the list of known hosts. execve("./syz-executor167810666", ["./syz-executor167810666"], 0x7ffcff738830 /* 10 vars */) = 0 brk(NULL) = 0x555556597000 brk(0x555556597c40) = 0x555556597c40 arch_prctl(ARCH_SET_FS, 0x555556597300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor167810666", 4096) = 27 brk(0x5555565b8c40) = 0x5555565b8c40 brk(0x5555565b9000) = 0x5555565b9000 mprotect(0x7fef8cc05000, 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 5007 attached , child_tidptr=0x5555565975d0) = 5007 [pid 5007] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5007] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5007] setsid() = 1 [pid 5007] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5007] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5007] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5007] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5007] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5007] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5007] unshare(CLONE_NEWNS) = 0 [pid 5007] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5007] unshare(CLONE_NEWIPC) = 0 [pid 5007] unshare(CLONE_NEWCGROUP) = 0 [pid 5007] unshare(CLONE_NEWUTS) = 0 [pid 5007] unshare(CLONE_SYSVSEM) = 0 [pid 5007] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5007] write(3, "16777216", 8) = 8 [pid 5007] close(3) = 0 [pid 5007] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5007] write(3, "536870912", 9) = 9 [pid 5007] close(3) = 0 [pid 5007] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5007] write(3, "1024", 4) = 4 [pid 5007] close(3) = 0 [pid 5007] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5007] write(3, "8192", 4) = 4 [pid 5007] close(3) = 0 [pid 5007] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5007] write(3, "1024", 4) = 4 [pid 5007] close(3) = 0 [pid 5007] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5007] write(3, "1024", 4) = 4 [pid 5007] close(3) = 0 [pid 5007] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5007] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5007] close(3) = 0 [pid 5007] getpid() = 1 [pid 5007] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<frame_sz = 131072 [ 77.386160][ T5007] WARNING: CPU: 0 PID: 5007 at net/core/filter.c:4120 bpf_xdp_adjust_tail+0x461/0x9a0 [ 77.395792][ T5007] Modules linked in: [ 77.399694][ T5007] CPU: 0 PID: 5007 Comm: syz-executor167 Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 [ 77.409652][ T5007] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 [ 77.419769][ T5007] RIP: 0010:bpf_xdp_adjust_tail+0x461/0x9a0 [ 77.425736][ T5007] Code: ff 89 de e8 f1 fd 69 f9 84 db 0f 85 59 fd ff ff e8 04 02 6a f9 89 ee 48 c7 c7 00 4e 5f 8b c6 05 51 1f 4b 06 01 e8 ff ae 31 f9 <0f> 0b e9 38 fd ff ff e8 03 02 bd f9 e9 64 fc ff ff e8 f9 01 bd f9 [ 77.445410][ T5007] RSP: 0018:ffffc90003b5f8f8 EFLAGS: 00010286 [ 77.451489][ T5007] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 77.459517][ T5007] RDX: ffff88802ca7bb80 RSI: ffffffff814bd247 RDI: 0000000000000001 [ 77.467574][ T5007] RBP: 0000000000020000 R08: 0000000000000001 R09: 0000000000000000 [ 77.475616][ T5007] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffffffffea [ 77.483627][ T5007] R13: ffff888072f0feef R14: 0000000000000000 R15: ffffc90003b5fab0 [ 77.491788][ T5007] FS: 0000555556597300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 77.500819][ T5007] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.507477][ T5007] CR2: 0000000020010000 CR3: 0000000072e52000 CR4: 00000000003506f0 [ 77.515538][ T5007] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.523533][ T5007] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.531565][ T5007] Call Trace: [ 77.534872][ T5007] [ 77.537875][ T5007] ? skb_free_head+0x110/0x1b0 [ 77.542693][ T5007] ? skb_headers_offset_update+0x129/0x260 [ 77.548589][ T5007] bpf_prog_4add87e5301a4105+0x1a/0x1c [ 77.554088][ T5007] bpf_prog_run_generic_xdp+0x578/0x1210 [ 77.559964][ T5007] netif_receive_generic_xdp+0x2e8/0x630 [ 77.565718][ T5007] do_xdp_generic+0x9a/0x1b0 [ 77.570364][ T5007] ? __netif_receive_skb_list_core+0x8f0/0x8f0 [ 77.576632][ T5007] tun_get_user+0x1bb9/0x39c0 [ 77.581373][ T5007] ? ref_tracker_alloc+0x2cf/0x580 [ 77.586567][ T5007] ? tun_build_skb+0x1230/0x1230 [ 77.591561][ T5007] ? lock_downgrade+0x690/0x690 [ 77.596517][ T5007] tun_chr_write_iter+0xdf/0x200 [ 77.601509][ T5007] vfs_write+0x945/0xd50 [ 77.605825][ T5007] ? kernel_write+0x670/0x670 [ 77.610545][ T5007] ? recalc_sigpending_tsk+0x18b/0x1d0 [ 77.616080][ T5007] ? find_held_lock+0x2d/0x110 [ 77.620902][ T5007] ? lock_downgrade+0x690/0x690 [ 77.625839][ T5007] ? __fget_light+0x20a/0x270 [ 77.630576][ T5007] ksys_write+0x12b/0x250 [ 77.634923][ T5007] ? __ia32_sys_read+0xb0/0xb0 [ 77.639772][ T5007] ? lockdep_hardirqs_on+0x7d/0x100 [ 77.645015][ T5007] ? _raw_spin_unlock_irq+0x2e/0x50 [ 77.650296][ T5007] ? ptrace_notify+0xfe/0x140 [ 77.655034][ T5007] do_syscall_64+0x39/0xb0 [ 77.659536][ T5007] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 77.665508][ T5007] RIP: 0033:0x7fef8cb52a63 [ 77.669935][ T5007] 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 [ 77.689607][ T5007] RSP: 002b:00007fff15f2a478 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 77.698094][ T5007] RAX: ffffffffffffffda RBX: 00007fff15f2a4a0 RCX: 00007fef8cb52a63 [ 77.706183][ T5007] RDX: 000000000000fdef RSI: 0000000020000300 RDI: 00000000000000c8 [ 77.714185][ T5007] RBP: 0000000000000003 R08: bb1414ac15f2a4a7 R09: bb1414ac15f2a4a7 [ 77.722221][ T5007] R10: bb1414ac15f2a4a7 R11: 0000000000000246 R12: 0000000000000000 [ 77.730248][ T5007] R13: 00007fff15f2a490 R14: 00007fff15f2a488 R15: 00007fff15f2a484 [ 77.738293][ T5007] [ 77.741334][ T5007] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 77.748707][ T5007] CPU: 0 PID: 5007 Comm: syz-executor167 Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 [ 77.758643][ T5007] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 [ 77.768709][ T5007] Call Trace: [ 77.772006][ T5007] [ 77.774945][ T5007] dump_stack_lvl+0xd9/0x150 [ 77.779833][ T5007] panic+0x686/0x730 [ 77.783758][ T5007] ? panic_smp_self_stop+0xa0/0xa0 [ 77.788900][ T5007] ? show_trace_log_lvl+0x285/0x390 [ 77.794138][ T5007] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 77.799443][ T5007] check_panic_on_warn+0xb1/0xc0 [ 77.804411][ T5007] __warn+0xf2/0x390 [ 77.808326][ T5007] ? __wake_up_klogd.part.0+0x99/0xf0 [ 77.813719][ T5007] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 77.819019][ T5007] report_bug+0x2da/0x500 [ 77.823378][ T5007] handle_bug+0x3c/0x70 [ 77.827623][ T5007] exc_invalid_op+0x18/0x50 [ 77.832135][ T5007] asm_exc_invalid_op+0x1a/0x20 [ 77.837009][ T5007] RIP: 0010:bpf_xdp_adjust_tail+0x461/0x9a0 [ 77.843005][ T5007] Code: ff 89 de e8 f1 fd 69 f9 84 db 0f 85 59 fd ff ff e8 04 02 6a f9 89 ee 48 c7 c7 00 4e 5f 8b c6 05 51 1f 4b 06 01 e8 ff ae 31 f9 <0f> 0b e9 38 fd ff ff e8 03 02 bd f9 e9 64 fc ff ff e8 f9 01 bd f9 [ 77.862634][ T5007] RSP: 0018:ffffc90003b5f8f8 EFLAGS: 00010286 [ 77.868714][ T5007] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 77.876698][ T5007] RDX: ffff88802ca7bb80 RSI: ffffffff814bd247 RDI: 0000000000000001 [ 77.884679][ T5007] RBP: 0000000000020000 R08: 0000000000000001 R09: 0000000000000000 [ 77.892655][ T5007] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffffffffea [ 77.900638][ T5007] R13: ffff888072f0feef R14: 0000000000000000 R15: ffffc90003b5fab0 [ 77.908641][ T5007] ? __warn_printk+0x187/0x310 [ 77.913436][ T5007] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 77.918746][ T5007] ? skb_free_head+0x110/0x1b0 [ 77.923537][ T5007] ? skb_headers_offset_update+0x129/0x260 [ 77.929377][ T5007] bpf_prog_4add87e5301a4105+0x1a/0x1c [ 77.934850][ T5007] bpf_prog_run_generic_xdp+0x578/0x1210 [ 77.940524][ T5007] netif_receive_generic_xdp+0x2e8/0x630 [ 77.946188][ T5007] do_xdp_generic+0x9a/0x1b0 [ 77.950810][ T5007] ? __netif_receive_skb_list_core+0x8f0/0x8f0 [ 77.957000][ T5007] tun_get_user+0x1bb9/0x39c0 [ 77.961705][ T5007] ? ref_tracker_alloc+0x2cf/0x580 [ 77.966874][ T5007] ? tun_build_skb+0x1230/0x1230 [ 77.972009][ T5007] ? lock_downgrade+0x690/0x690 [ 77.976897][ T5007] tun_chr_write_iter+0xdf/0x200 [ 77.981866][ T5007] vfs_write+0x945/0xd50 [ 77.986128][ T5007] ? kernel_write+0x670/0x670 [ 77.990818][ T5007] ? recalc_sigpending_tsk+0x18b/0x1d0 [ 77.996318][ T5007] ? find_held_lock+0x2d/0x110 [ 78.001133][ T5007] ? lock_downgrade+0x690/0x690 [ 78.006007][ T5007] ? __fget_light+0x20a/0x270 [ 78.010718][ T5007] ksys_write+0x12b/0x250 [ 78.015067][ T5007] ? __ia32_sys_read+0xb0/0xb0 [ 78.019856][ T5007] ? lockdep_hardirqs_on+0x7d/0x100 [ 78.025335][ T5007] ? _raw_spin_unlock_irq+0x2e/0x50 [ 78.030551][ T5007] ? ptrace_notify+0xfe/0x140 [ 78.035262][ T5007] do_syscall_64+0x39/0xb0 [ 78.039711][ T5007] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 78.045629][ T5007] RIP: 0033:0x7fef8cb52a63 [ 78.050049][ T5007] 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 [ 78.069665][ T5007] RSP: 002b:00007fff15f2a478 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 78.078176][ T5007] RAX: ffffffffffffffda RBX: 00007fff15f2a4a0 RCX: 00007fef8cb52a63 [ 78.086155][ T5007] RDX: 000000000000fdef RSI: 0000000020000300 RDI: 00000000000000c8 [ 78.094149][ T5007] RBP: 0000000000000003 R08: bb1414ac15f2a4a7 R09: bb1414ac15f2a4a7 [ 78.102142][ T5007] R10: bb1414ac15f2a4a7 R11: 0000000000000246 R12: 0000000000000000 [ 78.110126][ T5007] R13: 00007fff15f2a490 R14: 00007fff15f2a488 R15: 00007fff15f2a484 [ 78.118148][ T5007] [ 78.121453][ T5007] Kernel Offset: disabled [ 78.125866][ T5007] Rebooting in 86400 seconds..