./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor302099384 <...> forked to background, child pid 4659 no interfaces have a carrier [ 50.391490][ T4660] 8021q: adding VLAN 0 to HW filter on device bond0 [ 50.415504][ T4660] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.141' (ECDSA) to the list of known hosts. execve("./syz-executor302099384", ["./syz-executor302099384"], 0x7ffd3b3c6bb0 /* 10 vars */) = 0 brk(NULL) = 0x555555bbb000 brk(0x555555bbbc40) = 0x555555bbbc40 arch_prctl(ARCH_SET_FS, 0x555555bbb300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor302099384", 4096) = 27 brk(0x555555bdcc40) = 0x555555bdcc40 brk(0x555555bdd000) = 0x555555bdd000 mprotect(0x7f4f4c738000, 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 bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_XDP, insn_cnt=3, insns=0x20000280, license="GPL", log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=0, prog_name="", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=-1, func_info_rec_size=8, func_info=NULL, func_info_cnt=0, line_info_rec_size=16, line_info=NULL, line_info_cnt=0, attach_btf_id=0, attach_prog_fd=0, fd_array=NULL}, 128) = 3 syzkaller login: [ 76.776607][ T5085] BUG: kernel NULL pointer dereference, address: 0000000000000d50 [ 76.784467][ T5085] #PF: supervisor write access in kernel mode [ 76.790547][ T5085] #PF: error_code(0x0002) - not-present page [ 76.796531][ T5085] PGD 724ff067 P4D 724ff067 PUD 7bf33067 PMD 0 [ 76.802803][ T5085] Oops: 0002 [#1] PREEMPT SMP KASAN [ 76.808007][ T5085] CPU: 1 PID: 5085 Comm: syz-executor302 Not tainted 6.3.0-rc2-next-20230317-syzkaller #0 [ 76.817913][ T5085] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 76.828323][ T5085] RIP: 0010:memset_erms+0xd/0x20 [ 76.833308][ T5085] Code: 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 66 0f 1f 00 49 89 f9 40 88 f0 48 89 d1 aa 4c 89 c8 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 66 0f 1f [ 76.852941][ T5085] RSP: 0018:ffffc90003abf730 EFLAGS: 00010246 [ 76.859055][ T5085] RAX: 0000000000000000 RBX: ffff88801d6373c0 RCX: 0000000000000020 [ 76.867057][ T5085] RDX: 0000000000000020 RSI: 0000000000000000 RDI: 0000000000000d50 [ 76.875053][ T5085] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000d50 [ 76.883042][ T5085] R10: ffffed1003ac6e94 R11: 0000000000094001 R12: 0000000000000d70 [ 76.891105][ T5085] R13: 0000000000000d50 R14: 0000000000000f90 R15: 0000000000000100 [ 76.899079][ T5085] FS: 0000555555bbb300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 76.908021][ T5085] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.914623][ T5085] CR2: 0000000000000d50 CR3: 00000000724cc000 CR4: 00000000003506e0 [ 76.922598][ T5085] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.930567][ T5085] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.938541][ T5085] Call Trace: [ 76.941817][ T5085] [ 76.944747][ T5085] __build_skb_around+0x232/0x3a0 [ 76.949800][ T5085] build_skb_around+0x32/0x290 [ 76.954582][ T5085] __xdp_build_skb_from_frame+0x121/0x760 [ 76.960327][ T5085] bpf_test_run_xdp_live+0x1289/0x1930 [ 76.965795][ T5085] ? __static_call_update+0x4e6/0x620 [ 76.971178][ T5085] ? xdp_test_run_init_page+0x540/0x540 [ 76.976740][ T5085] ? 0xffffffffa00038c0 [ 76.980898][ T5085] ? bpf_test_run+0x9f0/0x9f0 [ 76.985586][ T5085] ? __mutex_unlock_slowpath+0x157/0x5e0 [ 76.991241][ T5085] ? 0xffffffffa00038c0 [ 76.995405][ T5085] ? bpf_dispatcher_change_prog+0x33f/0xb60 [ 77.001332][ T5085] ? bpf_dispatcher_prepare+0x240/0x240 [ 77.006909][ T5085] ? bpf_test_init.isra.0+0x128/0x150 [ 77.012298][ T5085] bpf_prog_test_run_xdp+0xa05/0x14e0 [ 77.017692][ T5085] ? __might_fault+0xe2/0x190 [ 77.022383][ T5085] ? bpf_prog_test_run_skb+0x1e10/0x1e10 [ 77.028057][ T5085] ? trace_lock_acquire+0x12d/0x180 [ 77.033268][ T5085] ? __fget_light+0x20a/0x270 [ 77.037968][ T5085] ? bpf_prog_test_run_skb+0x1e10/0x1e10 [ 77.043612][ T5085] __sys_bpf+0x1598/0x5100 [ 77.048049][ T5085] ? lock_sync+0x190/0x190 [ 77.052478][ T5085] ? bpf_perf_link_attach+0x520/0x520 [ 77.057861][ T5085] ? do_raw_spin_lock+0x124/0x2b0 [ 77.062899][ T5085] ? spin_bug+0x1c0/0x1c0 [ 77.067242][ T5085] ? lock_acquire+0x32/0xc0 [ 77.071755][ T5085] ? ptrace_stop.part.0+0x4e3/0x8e0 [ 77.076988][ T5085] ? recalc_sigpending_tsk+0x18b/0x1d0 [ 77.082473][ T5085] ? find_held_lock+0x2d/0x110 [ 77.087254][ T5085] ? _raw_spin_unlock_irq+0x23/0x50 [ 77.092472][ T5085] ? lockdep_hardirqs_on+0x7d/0x100 [ 77.097725][ T5085] __x64_sys_bpf+0x79/0xc0 [ 77.102158][ T5085] do_syscall_64+0x39/0xb0 [ 77.106594][ T5085] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 77.112521][ T5085] RIP: 0033:0x7f4f4c6cbca9 [ 77.116982][ T5085] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 77.136639][ T5085] RSP: 002b:00007fff9cd76cb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 77.145171][ T5085] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4f4c6cbca9 [ 77.153235][ T5085] RDX: 0000000000000048 RSI: 0000000020000080 RDI: 000000000000000a [ 77.161207][ T5085] RBP: 00007f4f4c68fe50 R08: 0000000000000000 R09: 0000000000000000 [ 77.169195][ T5085] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4f4c68fee0 [ 77.177182][ T5085] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 77.185171][ T5085] [ 77.188190][ T5085] Modules linked in: [ 77.192083][ T5085] CR2: 0000000000000d50 [ 77.196237][ T5085] ---[ end trace 0000000000000000 ]--- [ 77.201722][ T5085] RIP: 0010:memset_erms+0xd/0x20 [ 77.206683][ T5085] Code: 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 66 0f 1f 00 49 89 f9 40 88 f0 48 89 d1 aa 4c 89 c8 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 66 0f 1f [ 77.226309][ T5085] RSP: 0018:ffffc90003abf730 EFLAGS: 00010246 [ 77.232391][ T5085] RAX: 0000000000000000 RBX: ffff88801d6373c0 RCX: 0000000000000020 [ 77.240381][ T5085] RDX: 0000000000000020 RSI: 0000000000000000 RDI: 0000000000000d50 [ 77.248365][ T5085] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000d50 [ 77.256350][ T5085] R10: ffffed1003ac6e94 R11: 0000000000094001 R12: 0000000000000d70 [ 77.264331][ T5085] R13: 0000000000000d50 R14: 0000000000000f90 R15: 0000000000000100 [ 77.272329][ T5085] FS: 0000555555bbb300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 77.281283][ T5085] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.287907][ T5085] CR2: 0000000000000d50 CR3: 00000000724cc000 CR4: 00000000003506e0 [ 77.295890][ T5085] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.303879][ T5085] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.311855][ T5085] Kernel panic - not syncing: Fatal exception in interrupt [ 77.319133][ T5085] Kernel Offset: disabled [ 77.323477][ T5085] Rebooting in 86400 seconds..