./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor440873486 <...> DUID 00:04:11:8f:03:6f:2d:f9:09:85:36:f8:30:a5:df:54:60:b4 forked to background, child pid 192 Starting sshd: OK syzkaller syzkaller login: [ 14.995378][ T23] kauditd_printk_skb: 60 callbacks suppressed [ 14.995384][ T23] audit: type=1400 audit(1669766020.529:71): avc: denied { transition } for pid=265 comm="sshd" path="/bin/sh" dev="sda1" ino=73 scontext=system_u:system_r:initrc_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 15.000443][ T23] audit: type=1400 audit(1669766020.539:72): avc: denied { write } for pid=265 comm="sh" path="pipe:[9803]" dev="pipefs" ino=9803 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 Warning: Permanently added '10.128.1.96' (ECDSA) to the list of known hosts. execve("./syz-executor440873486", ["./syz-executor440873486"], 0x7ffff785b800 /* 10 vars */) = 0 brk(NULL) = 0x555555dc4000 brk(0x555555dc4c40) = 0x555555dc4c40 arch_prctl(ARCH_SET_FS, 0x555555dc4300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor440873486", 4096) = 27 brk(0x555555de5c40) = 0x555555de5c40 brk(0x555555de6000) = 0x555555de6000 mprotect(0x7fda89103000, 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_SCHED_CLS, insn_cnt=3, insns=0x20001fd8, license="", log_level=5, log_size=1159, log_buf="", kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=0, prog_name="", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS}, 72) = 3 [ 22.182120][ T23] audit: type=1400 audit(1669766027.719:73): avc: denied { execmem } for pid=304 comm="syz-executor440" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.204353][ T23] audit: type=1400 audit(1669766027.749:74): avc: denied { prog_load } for pid=304 comm="syz-executor440" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 22.217397][ T304] kasan: CONFIG_KASAN_INLINE enabled [ 22.224093][ T23] audit: type=1400 audit(1669766027.749:75): avc: denied { prog_run } for pid=304 comm="syz-executor440" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 22.228836][ T304] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 22.228846][ T304] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 22.228854][ T304] CPU: 1 PID: 304 Comm: syz-executor440 Not tainted 5.4.210-syzkaller-00013-gdf2b5549c0ec #0 [ 22.228864][ T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 22.283349][ T304] RIP: 0010:bpf_skb_cgroup_id+0x10c/0x190 [ 22.289127][ T304] Code: c7 a0 02 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 c3 58 14 fe bb 40 01 00 00 49 03 1f 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 a5 58 14 fe 48 8b 1b 48 83 c3 68 [ 22.308697][ T304] RSP: 0018:ffff8881dd18f640 EFLAGS: 00010206 [ 22.314732][ T304] RAX: 0000000000000028 RBX: 0000000000000140 RCX: ffff8881dd6a8000 [ 22.322675][ T304] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000000 [ 22.330616][ T304] RBP: ffff8881dd18f690 R08: ffffffff837f4ab3 R09: ffff8881dd18f760 [ 22.338558][ T304] R10: ffffed103ba31eee R11: 1ffff1103ba31eec R12: dffffc0000000000 [ 22.346499][ T304] R13: fffffffad44ed384 R14: ffff8881e2d29812 R15: ffff8881e2d29aa0 [ 22.354440][ T304] FS: 0000555555dc4300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 22.363336][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.369973][ T304] CR2: 00007fdccf15da70 CR3: 00000001dd14e000 CR4: 00000000003406e0 [ 22.377921][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.385865][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.393807][ T304] Call Trace: [ 22.397082][ T304] ? bpf_test_run+0x2b4/0x6a0 [ 22.401739][ T304] ? bpf_ctx_init+0x1b0/0x1b0 [ 22.406386][ T304] ? build_skb+0x24c/0x450 [ 22.410773][ T304] ? bpf_prog_test_run_skb+0x842/0xf80 [ 22.416205][ T304] ? __bpf_trace_bpf_test_finish+0x20/0x20 [ 22.421980][ T304] ? __fdget+0x14f/0x200 [ 22.426193][ T304] ? bpf_prog_get+0x183/0x1b0 [ 22.430840][ T304] ? __bpf_trace_bpf_test_finish+0x20/0x20 [ 22.436614][ T304] ? __se_sys_bpf+0x2bbc/0xbba0 [ 22.441432][ T304] ? debug_smp_processor_id+0x20/0x20 [ 22.446777][ T304] ? check_preemption_disabled+0x9e/0x330 [ 22.452469][ T304] ? rcu_softirq_qs+0x90/0x90 [ 22.457112][ T304] ? debug_smp_processor_id+0x20/0x20 [ 22.462456][ T304] ? cpuacct_charge+0xe5/0x160 [ 22.467190][ T304] ? check_preemption_disabled+0x9e/0x330 [ 22.472898][ T304] ? check_preemption_disabled+0x9e/0x330 [ 22.478583][ T304] ? debug_smp_processor_id+0x20/0x20 [ 22.483924][ T304] ? switch_mm_irqs_off+0x542/0x960 [ 22.489089][ T304] ? debug_smp_processor_id+0x20/0x20 [ 22.494428][ T304] ? __x64_sys_bpf+0x80/0x80 [ 22.498988][ T304] ? switch_mm+0x100/0x100 [ 22.503375][ T304] ? _raw_spin_unlock_irq+0x4a/0x60 [ 22.508543][ T304] ? finish_task_switch+0x130/0x560 [ 22.513709][ T304] ? __schedule+0x98e/0x1050 [ 22.518270][ T304] ? _raw_spin_lock_irq+0xa4/0x1b0 [ 22.523351][ T304] ? _raw_spin_lock_irqsave+0x210/0x210 [ 22.528886][ T304] ? cgroup_update_frozen+0x139/0x360 [ 22.534223][ T304] ? cgroup_update_frozen+0x139/0x360 [ 22.539588][ T304] ? cgroup_leave_frozen+0x13b/0x290 [ 22.544846][ T304] ? ptrace_stop+0x6eb/0xa30 [ 22.549407][ T304] ? _raw_spin_unlock_irq+0x4a/0x60 [ 22.554575][ T304] ? ptrace_notify+0x248/0x340 [ 22.559309][ T304] ? do_notify_parent+0xa40/0xa40 [ 22.564389][ T304] ? check_preemption_disabled+0x154/0x330 [ 22.570165][ T304] ? syscall_trace_enter+0x652/0x940 [ 22.575422][ T304] ? switch_fpu_return+0x10/0x10 [ 22.580335][ T304] ? do_syscall_64+0xcb/0x1c0 [ 22.584986][ T304] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 22.591015][ T304] Modules linked in: [ 22.595003][ T304] ---[ end trace ec6e06664ba6feeb ]--- [ 22.600481][ T304] RIP: 0010:bpf_skb_cgroup_id+0x10c/0x190 [ 22.606176][ T304] Code: c7 a0 02 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 c3 58 14 fe bb 40 01 00 00 49 03 1f 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 a5 58 14 fe 48 8b 1b 48 83 c3 68 [ 22.625788][ T304] RSP: 0018:ffff8881dd18f640 EFLAGS: 00010206 [ 22.631853][ T304] RAX: 0000000000000028 RBX: 0000000000000140 RCX: ffff8881dd6a8000 [ 22.639825][ T304] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000000 [ 22.647804][ T304] RBP: ffff8881dd18f690 R08: ffffffff837f4ab3 R09: ffff8881dd18f760 [ 22.655764][ T304] R10: ffffed103ba31eee R11: 1ffff1103ba31eec R12: dffffc0000000000 [ 22.663737][ T304] R13: fffffffad44ed384 R14: ffff8881e2d29812 R15: ffff8881e2d29aa0 [ 22.671726][ T304] FS: 0000555555dc4300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 22.680831][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.687412][ T304] CR2: 00007fdccf15da70 CR3: 00000001dd14e000 CR4: 00000000003406e0 [ 22.695446][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.703414][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.711395][ T304] Kernel panic - not syncing: Fatal exception [ 22.717682][ T304] Kernel Offset: disabled [ 22.721996][ T304] Rebooting in 86400 seconds..