./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor446980557 <...> Warning: Permanently added '10.128.1.7' (ED25519) to the list of known hosts. execve("./syz-executor446980557", ["./syz-executor446980557"], 0x7ffe8bee61b0 /* 10 vars */) = 0 brk(NULL) = 0x5555762dd000 brk(0x5555762ddd00) = 0x5555762ddd00 arch_prctl(ARCH_SET_FS, 0x5555762dd380) = 0 set_tid_address(0x5555762dd650) = 289 set_robust_list(0x5555762dd660, 24) = 0 rseq(0x5555762ddca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor446980557", 4096) = 27 getrandom("\x99\xa5\x97\x68\x08\x4a\x3a\x61", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555762ddd00 brk(0x5555762fed00) = 0x5555762fed00 brk(0x5555762ff000) = 0x5555762ff000 mprotect(0x7f86b96e7000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0executing program ) = 0x200001000000 write(1, "executing program\n", 18) = 18 socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 3 socketpair(AF_UNIX, SOCK_SEQPACKET, 0, [4, 5]) = 0 ioctl(5, SIOCGIFINDEX, {ifr_name="lo", ifr_ifindex=1}) = 0 sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x48\x00\x00\x00\x24\x00\x0f\x0d\x2d\xbd\x70\x00\x00\x00\x00\x00\x60\x00\x00\x00\x01\x00\x00\x00\x00\x00\x0a\x00\xff\xff\xff\xff\x00\x00\xff\xff\x08\x00\x01\x00\x68\x74\x62\x00\x1c\x00\x02\x00\x18\x00\x02\x00\x03\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", iov_len=72}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, MSG_EOR|MSG_NOSIGNAL|MSG_BATCH) = 72 socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 6 [ 26.723276][ T28] audit: type=1400 audit(1753527538.339:64): avc: denied { execmem } for pid=289 comm="syz-executor446" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 26.743480][ T289] netlink: 4 bytes leftover after parsing attributes in process `syz-executor446'. [ 26.753394][ T289] general protection fault, probably for non-canonical address 0xdffffc0000000037: 0000 [#1] PREEMPT SMP KASAN [ 26.765104][ T289] KASAN: null-ptr-deref in range [0x00000000000001b8-0x00000000000001bf] [ 26.773513][ T289] CPU: 0 PID: 289 Comm: syz-executor446 Not tainted 6.1.145-syzkaller-00015-g2ff414a09808 #0 [ 26.783751][ T289] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 26.793814][ T289] RIP: 0010:htb_qlen_notify+0x30/0xc0 [ 26.799219][ T289] Code: 41 56 41 55 41 54 53 49 89 f6 49 89 ff 49 bc 00 00 00 00 00 fc ff df e8 4e 0f 6f fd 4d 8d ae b8 01 00 00 4c 89 eb 48 c1 eb 03 <42> 0f b6 04 23 84 c0 75 56 45 8b 65 00 31 ff 44 89 e6 e8 49 13 6f [ 26.818827][ T289] RSP: 0018:ffffc90000df6ea8 EFLAGS: 00010202 [ 26.824902][ T289] RAX: ffffffff8400ef52 RBX: 0000000000000037 RCX: ffff88810ecb2880 [ 26.832880][ T289] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88810ee28000 [ 26.840854][ T289] RBP: ffffc90000df6ed0 R08: ffff88810ecb2880 R09: 0000000000000002 [ 26.848821][ T289] R10: 0000000000000000 R11: ffffffff8400ef30 R12: dffffc0000000000 [ 26.856804][ T289] R13: 00000000000001b8 R14: 0000000000000000 R15: ffff88810ee28000 [ 26.864780][ T289] FS: 00005555762dd380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 26.873722][ T289] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.880313][ T289] CR2: 000055a7f22cd028 CR3: 0000000124006000 CR4: 00000000003506b0 [ 26.888288][ T289] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.896264][ T289] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.904319][ T289] Call Trace: [ 26.907598][ T289] [ 26.910540][ T289] qdisc_tree_reduce_backlog+0x20a/0x360 [ 26.916177][ T289] sfq_init+0x1b59/0x2870 [ 26.920520][ T289] ? ___sys_sendmsg+0x21c/0x290 [ 26.925466][ T289] ? __cfi_sfq_init+0x10/0x10 [ 26.930156][ T289] qdisc_create+0x7f3/0x1040 [ 26.934855][ T289] ? qdisc_notify+0x360/0x360 [ 26.939544][ T289] ? qdisc_lookup+0x319/0x4e0 [ 26.944224][ T289] tc_modify_qdisc+0x8ea/0x1900 [ 26.949092][ T289] ? __cfi_tc_modify_qdisc+0x10/0x10 [ 26.954386][ T289] ? __kasan_check_write+0x14/0x20 [ 26.959514][ T289] ? mutex_lock+0x8d/0x1a0 [ 26.963931][ T289] ? __cfi_mutex_lock+0x10/0x10 [ 26.968798][ T289] ? ns_capable+0x8c/0xf0 [ 26.973122][ T289] ? netlink_net_capable+0x125/0x160 [ 26.978406][ T289] ? __cfi_tc_modify_qdisc+0x10/0x10 [ 26.983697][ T289] rtnetlink_rcv_msg+0x9f4/0xcf0 [ 26.988642][ T289] ? __cfi_rtnetlink_rcv_msg+0x10/0x10 [ 26.994108][ T289] ? kernel_text_address+0xa0/0xd0 [ 26.999227][ T289] ? __kernel_text_address+0xd/0x30 [ 27.004433][ T289] ? unwind_get_return_address+0x4d/0x90 [ 27.010069][ T289] ? memcpy+0x56/0x70 [ 27.014078][ T289] ? avc_has_perm_noaudit+0x2f4/0x460 [ 27.019455][ T289] ? __cfi_avc_has_perm_noaudit+0x10/0x10 [ 27.025180][ T289] ? slab_post_alloc_hook+0x4f/0x2d0 [ 27.030472][ T289] ? kmem_cache_alloc_node+0x181/0x340 [ 27.035936][ T289] ? __alloc_skb+0xea/0x4b0 [ 27.040453][ T289] ? avc_has_perm+0x158/0x240 [ 27.045145][ T289] ? __alloc_skb+0x236/0x4b0 [ 27.049740][ T289] ? netlink_sendmsg+0x626/0xbc0 [ 27.054686][ T289] ? __cfi_avc_has_perm+0x10/0x10 [ 27.059803][ T289] ? selinux_nlmsg_lookup+0x400/0x4c0 [ 27.065183][ T289] netlink_rcv_skb+0x1f2/0x440 [ 27.069955][ T289] ? __cfi_rtnetlink_rcv_msg+0x10/0x10 [ 27.075416][ T289] ? __cfi_netlink_rcv_skb+0x10/0x10 [ 27.080709][ T289] ? __netlink_lookup+0x387/0x3b0 [ 27.085750][ T289] rtnetlink_rcv+0x1c/0x20 [ 27.090167][ T289] netlink_unicast+0x8b1/0xa30 [ 27.094942][ T289] netlink_sendmsg+0x8aa/0xbc0 [ 27.099737][ T289] ? __cfi_netlink_sendmsg+0x10/0x10 [ 27.105214][ T289] ? security_socket_sendmsg+0x93/0xb0 [ 27.110685][ T289] ? __cfi_netlink_sendmsg+0x10/0x10 [ 27.115982][ T289] ____sys_sendmsg+0x5a9/0x990 [ 27.120746][ T289] ? __sys_sendmsg_sock+0x40/0x40 [ 27.125772][ T289] ? import_iovec+0x7c/0xb0 [ 27.130276][ T289] ___sys_sendmsg+0x21c/0x290 [ 27.134958][ T289] ? __sys_sendmsg+0x270/0x270 [ 27.139732][ T289] ? finish_task_switch+0x16b/0x7b0 [ 27.144953][ T289] ? __schedule+0xb8f/0x14e0 [ 27.149559][ T289] ? memset+0x35/0x40 [ 27.153555][ T289] ? __kasan_check_read+0x11/0x20 [ 27.158587][ T289] ? __fdget+0x15b/0x220 [ 27.162837][ T289] __x64_sys_sendmsg+0x1f0/0x2c0 [ 27.167785][ T289] ? _raw_spin_unlock_irq+0x4d/0x70 [ 27.172998][ T289] ? __cfi___x64_sys_sendmsg+0x10/0x10 [ 27.178470][ T289] ? fpregs_restore_userregs+0x128/0x260 [ 27.184108][ T289] x64_sys_call+0x171/0x9a0 [ 27.188611][ T289] do_syscall_64+0x4c/0xa0 [ 27.193140][ T289] ? clear_bhb_loop+0x30/0x80 [ 27.197817][ T289] ? clear_bhb_loop+0x30/0x80 [ 27.202572][ T289] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 27.208467][ T289] RIP: 0033:0x7f86b96746a9 [ 27.212978][ T289] Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 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 b8 ff ff ff f7 d8 64 89 01 48 [ 27.232584][ T289] RSP: 002b:00007ffcd41d1388 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 27.241002][ T289] RAX: ffffffffffffffda RBX: 00007ffcd41d1558 RCX: 00007f86b96746a9 [ 27.248970][ T289] RDX: 0000000000004000 RSI: 0000200000000040 RDI: 0000000000000006 [ 27.256930][ T289] RBP: 00007f86b96e7610 R08: 000000000000000a R09: 00007ffcd41d1558 [ 27.264981][ T289] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000001 [ 27.272960][ T289] R13: 00007ffcd41d1548 R14: 0000000000000001 R15: 0000000000000001 [ 27.280935][ T289] [ 27.283969][ T289] Modules linked in: [ 27.287912][ T289] ---[ end trace 0000000000000000 ]--- [ 27.290003][ T28] audit: type=1400 audit(1753527538.899:65): avc: denied { read } for pid=84 comm="syslogd" name="log" dev="sda1" ino=2010 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:var_t tclass=lnk_file permissive=1 [ 27.293394][ T289] RIP: 0010:htb_qlen_notify+0x30/0xc0 [ 27.318737][ T28] audit: type=1400 audit(1753527538.899:66): avc: denied { search } for pid=84 comm="syslogd" name="/" dev="tmpfs" ino=1 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 27.320393][ T289] Code: 41 56 41 55 41 54 53 49 89 f6 49 89 ff 49 bc 00 00 00 00 00 fc ff df e8 4e 0f 6f fd 4d 8d ae b8 01 00 00 4c 89 eb 48 c1 eb 03 <42> 0f b6 04 23 84 c0 75 56 45 8b 65 00 31 ff 44 89 e6 e8 49 13 6f [ 27.341831][ T28] audit: type=1400 audit(1753527538.899:67): avc: denied { write } for pid=84 comm="syslogd" name="/" dev="tmpfs" ino=1 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 27.361223][ T289] RSP: 0018:ffffc90000df6ea8 EFLAGS: 00010202 [ 27.382686][ T28] audit: type=1400 audit(1753527538.899:68): avc: denied { add_name } for pid=84 comm="syslogd" name="messages" scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 27.388507][ T289] RAX: ffffffff8400ef52 RBX: 0000000000000037 RCX: ffff88810ecb2880 [ 27.409151][ T28] audit: type=1400 audit(1753527538.899:69): avc: denied { create } for pid=84 comm="syslogd" name="messages" scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 27.416929][ T289] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88810ee28000 [ 27.437522][ T28] audit: type=1400 audit(1753527538.909:70): avc: denied { append open } for pid=84 comm="syslogd" path="/tmp/messages" dev="tmpfs" ino=5 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 27.445254][ T289] RBP: ffffc90000df6ed0 R08: ffff88810ecb2880 R09: 0000000000000002 [ 27.445272][ T289] R10: 0000000000000000 R11: ffffffff8400ef30 R12: dffffc0000000000 [ 27.468286][ T28] audit: type=1400 audit(1753527538.909:71): avc: denied { getattr } for pid=84 comm="syslogd" path="/tmp/messages" dev="tmpfs" ino=5 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 27.476011][ T289] R13: 00000000000001b8 R14: 0000000000000000 R15: ffff88810ee28000 [ 27.476029][ T289] FS: 00005555762dd380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 27.523421][ T289] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.530031][ T289] CR2: 000055a7f22cd028 CR3: 0000000124006000 CR4: 00000000003506b0 [ 27.538011][ T289] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.545999][ T289] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.553992][ T289] Kernel panic - not syncing: Fatal exception in interrupt [ 27.561391][ T289] Kernel Offset: disabled [ 27.565713][ T289] Rebooting in 86400 seconds..