./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor702638368 <...> forked to background, child pid 4659 [ 51.978643][ T4660] 8021q: adding VLAN 0 to HW filter on device bond0 [ 51.998432][ T4660] eql: remember to turn off Van-Jacobson compression on your slave devices [ 52.399816][ T4747] ssh-keygen (4747) used greatest stack depth: 21872 bytes left Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.42' (ECDSA) to the list of known hosts. execve("./syz-executor702638368", ["./syz-executor702638368"], 0x7ffdb9ab5510 /* 10 vars */) = 0 brk(NULL) = 0x5555565c9000 brk(0x5555565c9c40) = 0x5555565c9c40 arch_prctl(ARCH_SET_FS, 0x5555565c9300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor702638368", 4096) = 27 brk(0x5555565eac40) = 0x5555565eac40 brk(0x5555565eb000) = 0x5555565eb000 mprotect(0x7fa32be7a000, 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: [ 76.941473][ T5083] BUG: kernel NULL pointer dereference, address: 0000000000000d50 [ 76.949333][ T5083] #PF: supervisor write access in kernel mode [ 76.955409][ T5083] #PF: error_code(0x0002) - not-present page [ 76.961403][ T5083] PGD 22713067 P4D 22713067 PUD 23998067 PMD 0 [ 76.967698][ T5083] Oops: 0002 [#1] PREEMPT SMP KASAN [ 76.972945][ T5083] CPU: 0 PID: 5083 Comm: syz-executor702 Not tainted 6.3.0-rc2-next-20230317-syzkaller #0 [ 76.982858][ T5083] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 76.992927][ T5083] RIP: 0010:memset_erms+0xd/0x20 [ 76.998282][ T5083] 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 [ 77.018266][ T5083] RSP: 0018:ffffc90003bef730 EFLAGS: 00010246 [ 77.024468][ T5083] RAX: 0000000000000000 RBX: ffff888017435dc0 RCX: 0000000000000020 [ 77.032722][ T5083] RDX: 0000000000000020 RSI: 0000000000000000 RDI: 0000000000000d50 [ 77.040823][ T5083] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000d50 [ 77.048861][ T5083] R10: ffffed1002e86bd4 R11: 0000000000094001 R12: 0000000000000d70 [ 77.056954][ T5083] R13: 0000000000000d50 R14: 0000000000000f90 R15: 0000000000000100 [ 77.064941][ T5083] FS: 00005555565c9300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 77.073916][ T5083] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.080519][ T5083] CR2: 0000000000000d50 CR3: 000000001c87e000 CR4: 00000000003506f0 [ 77.088531][ T5083] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.096565][ T5083] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.104768][ T5083] Call Trace: [ 77.108156][ T5083] [ 77.111111][ T5083] __build_skb_around+0x232/0x3a0 [ 77.116176][ T5083] build_skb_around+0x32/0x290 [ 77.120972][ T5083] __xdp_build_skb_from_frame+0x121/0x760 [ 77.127443][ T5083] bpf_test_run_xdp_live+0x1289/0x1930 [ 77.133124][ T5083] ? __static_call_update+0x4e6/0x620 [ 77.138542][ T5083] ? xdp_test_run_init_page+0x540/0x540 [ 77.144146][ T5083] ? 0xffffffffa0003b40 [ 77.148321][ T5083] ? bpf_test_run+0x9f0/0x9f0 [ 77.153075][ T5083] ? __mutex_unlock_slowpath+0x157/0x5e0 [ 77.158844][ T5083] ? 0xffffffffa0003b40 [ 77.163048][ T5083] ? bpf_dispatcher_change_prog+0x33f/0xb60 [ 77.169070][ T5083] ? bpf_dispatcher_prepare+0x240/0x240 [ 77.174648][ T5083] ? bpf_test_init.isra.0+0x128/0x150 [ 77.180063][ T5083] bpf_prog_test_run_xdp+0xa05/0x14e0 [ 77.185484][ T5083] ? __might_fault+0xe2/0x190 [ 77.190182][ T5083] ? bpf_prog_test_run_skb+0x1e10/0x1e10 [ 77.195839][ T5083] ? trace_lock_acquire+0x12d/0x180 [ 77.201083][ T5083] ? __fget_light+0x20a/0x270 [ 77.205807][ T5083] ? bpf_prog_test_run_skb+0x1e10/0x1e10 [ 77.211479][ T5083] __sys_bpf+0x1598/0x5100 [ 77.216101][ T5083] ? lock_sync+0x190/0x190 [ 77.220626][ T5083] ? bpf_perf_link_attach+0x520/0x520 [ 77.226018][ T5083] ? do_raw_spin_lock+0x124/0x2b0 [ 77.231854][ T5083] ? spin_bug+0x1c0/0x1c0 [ 77.236211][ T5083] ? lock_acquire+0x32/0xc0 [ 77.240736][ T5083] ? ptrace_stop.part.0+0x4e3/0x8e0 [ 77.245972][ T5083] ? recalc_sigpending_tsk+0x18b/0x1d0 [ 77.251459][ T5083] ? find_held_lock+0x2d/0x110 [ 77.256247][ T5083] ? _raw_spin_unlock_irq+0x23/0x50 [ 77.261474][ T5083] ? lockdep_hardirqs_on+0x7d/0x100 [ 77.266700][ T5083] __x64_sys_bpf+0x79/0xc0 [ 77.271136][ T5083] do_syscall_64+0x39/0xb0 [ 77.275566][ T5083] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 77.281481][ T5083] RIP: 0033:0x7fa32be0dca9 [ 77.285923][ T5083] 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 [ 77.305561][ T5083] RSP: 002b:00007ffe0685d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 77.314015][ T5083] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa32be0dca9 [ 77.322012][ T5083] RDX: 0000000000000048 RSI: 0000000020000080 RDI: 000000000000000a [ 77.329990][ T5083] RBP: 00007fa32bdd1e50 R08: 0000000000000000 R09: 0000000000000000 [ 77.337967][ T5083] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa32bdd1ee0 [ 77.346130][ T5083] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 77.354391][ T5083] [ 77.357427][ T5083] Modules linked in: [ 77.361327][ T5083] CR2: 0000000000000d50 [ 77.365578][ T5083] ---[ end trace 0000000000000000 ]--- [ 77.371030][ T5083] RIP: 0010:memset_erms+0xd/0x20 [ 77.376003][ T5083] 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 [ 77.395631][ T5083] RSP: 0018:ffffc90003bef730 EFLAGS: 00010246 [ 77.401730][ T5083] RAX: 0000000000000000 RBX: ffff888017435dc0 RCX: 0000000000000020 [ 77.410414][ T5083] RDX: 0000000000000020 RSI: 0000000000000000 RDI: 0000000000000d50 [ 77.418403][ T5083] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000d50 [ 77.426391][ T5083] R10: ffffed1002e86bd4 R11: 0000000000094001 R12: 0000000000000d70 [ 77.434387][ T5083] R13: 0000000000000d50 R14: 0000000000000f90 R15: 0000000000000100 [ 77.442396][ T5083] FS: 00005555565c9300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 77.451428][ T5083] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.458048][ T5083] CR2: 0000000000000d50 CR3: 000000001c87e000 CR4: 00000000003506f0 [ 77.466036][ T5083] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.474030][ T5083] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.482106][ T5083] Kernel panic - not syncing: Fatal exception in interrupt [ 77.489823][ T5083] Kernel Offset: disabled [ 77.494180][ T5083] Rebooting in 86400 seconds..