./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2130152197 <...> Warning: Permanently added '10.128.0.171' (ED25519) to the list of known hosts. execve("./syz-executor2130152197", ["./syz-executor2130152197"], 0x7ffd92c386c0 /* 10 vars */) = 0 brk(NULL) = 0x55555fbf5000 brk(0x55555fbf5d00) = 0x55555fbf5d00 arch_prctl(ARCH_SET_FS, 0x55555fbf5380) = 0 set_tid_address(0x55555fbf5650) = 288 set_robust_list(0x55555fbf5660, 24) = 0 rseq(0x55555fbf5ca0, 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-executor2130152197", 4096) = 28 getrandom("\x21\x78\xb1\xed\x32\x5e\xb7\xca", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555fbf5d00 brk(0x55555fc16d00) = 0x55555fc16d00 brk(0x55555fc17000) = 0x55555fc17000 mprotect(0x7f249c0e7000, 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, 0) = 0x200001000000 write(1, "executing program\n", 18executing program ) = 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="\x40\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\x14\x00\x01\x00\x70\x66\x69\x66\x6f\x5f\x68\x65\x61\x64\x5f\x64\x72\x6f\x70\x00\x08\x00\x02\x00\x02\x00\x00\x00", iov_len=64}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, MSG_EOR|MSG_NOSIGNAL|MSG_BATCH) = 64 [ 19.995684][ T30] audit: type=1400 audit(1752661638.087:64): avc: denied { execmem } for pid=288 comm="syz-executor213" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.001723][ T288] general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN [ 20.003502][ T288] KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] [ 20.004646][ T288] CPU: 0 PID: 288 Comm: syz-executor213 Not tainted 5.15.188-syzkaller-00606-g6b619c45dff5 #0 [ 20.005993][ T288] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 20.007309][ T288] RIP: 0010:qdisc_tree_reduce_backlog+0x181/0x340 [ 20.008189][ T288] Code: e8 f4 89 d7 fd 4d 89 ef 83 7d d0 00 74 0a e8 d6 12 99 fd e9 80 00 00 00 4d 8b 36 49 8d 46 20 48 89 c1 48 c1 e9 03 48 89 4d b8 <80> 3c 19 00 48 89 45 d0 74 0d 48 8b 7d d0 e8 bc 89 d7 fd 48 8b 45 [ 20.010811][ T288] RSP: 0018:ffffc900009c6f08 EFLAGS: 00010202 [ 20.011666][ T288] RAX: 0000000000000020 RBX: dffffc0000000000 RCX: 0000000000000004 [ 20.012717][ T288] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 20.013769][ T288] RBP: ffffc900009c6f50 R08: ffff8881057a4f00 R09: 0000000000000002 [ 20.014832][ T288] R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000000affe0 [ 20.016484][ T288] R13: ffff8881059fec00 R14: 0000000000000000 R15: ffff8881059fec00 [ 20.024426][ T288] FS: 000055555fbf5380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 20.033325][ T288] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.039881][ T288] CR2: 000055ea3da3b028 CR3: 00000001219d8000 CR4: 00000000003506b0 [ 20.047825][ T288] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.055769][ T288] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.063711][ T288] Call Trace: [ 20.066968][ T288] [ 20.069872][ T288] codel_change+0x8d1/0xc00 [ 20.074358][ T288] ? codel_reset+0x150/0x150 [ 20.078921][ T288] ? qdisc_alloc+0x78/0x770 [ 20.083400][ T288] codel_init+0x1a8/0x390 [ 20.087702][ T288] ? qdisc_peek_dequeued+0x230/0x230 [ 20.092955][ T288] qdisc_create+0x7ed/0x11a0 [ 20.097518][ T288] ? qdisc_notify+0x350/0x350 [ 20.102165][ T288] ? __nla_parse+0x42/0x60 [ 20.106554][ T288] tc_modify_qdisc+0x896/0x1480 [ 20.111379][ T288] ? qdisc_offload_graft_helper+0x290/0x290 [ 20.117241][ T288] ? cap_capable+0x1aa/0x230 [ 20.121803][ T288] ? ns_capable+0x8c/0xf0 [ 20.126105][ T288] ? netlink_net_capable+0x125/0x160 [ 20.131380][ T288] ? qdisc_offload_graft_helper+0x290/0x290 [ 20.137244][ T288] rtnetlink_rcv_msg+0x9e4/0xb90 [ 20.142155][ T288] ? rtnetlink_bind+0x80/0x80 [ 20.146799][ T288] ? memcpy+0x56/0x70 [ 20.150751][ T288] ? avc_has_perm_noaudit+0x2f4/0x460 [ 20.156091][ T288] ? arch_stack_walk+0xee/0x140 [ 20.160915][ T288] ? avc_denied+0x1b0/0x1b0 [ 20.165392][ T288] ? stack_trace_save+0x98/0xe0 [ 20.170220][ T288] ? avc_has_perm+0x158/0x240 [ 20.174865][ T288] ? avc_has_perm_noaudit+0x460/0x460 [ 20.180208][ T288] ? x64_sys_call+0x4b/0x9a0 [ 20.184775][ T288] ? selinux_nlmsg_lookup+0x400/0x4c0 [ 20.190119][ T288] netlink_rcv_skb+0x1e0/0x430 [ 20.194854][ T288] ? rtnetlink_bind+0x80/0x80 [ 20.199504][ T288] ? netlink_ack+0xb60/0xb60 [ 20.204067][ T288] ? __netlink_lookup+0x387/0x3b0 [ 20.209061][ T288] rtnetlink_rcv+0x1c/0x20 [ 20.213449][ T288] netlink_unicast+0x87c/0xa40 [ 20.218183][ T288] netlink_sendmsg+0x86a/0xb70 [ 20.222924][ T288] ? netlink_getsockopt+0x530/0x530 [ 20.228093][ T288] ? security_socket_sendmsg+0x82/0xa0 [ 20.233531][ T288] ? netlink_getsockopt+0x530/0x530 [ 20.238721][ T288] ____sys_sendmsg+0x5a2/0x8c0 [ 20.243475][ T288] ? __sys_sendmsg_sock+0x40/0x40 [ 20.248472][ T288] ? import_iovec+0x7c/0xb0 [ 20.252948][ T288] ___sys_sendmsg+0x1f0/0x260 [ 20.257600][ T288] ? _raw_spin_unlock+0x4d/0x70 [ 20.262421][ T288] ? __sys_sendmsg+0x250/0x250 [ 20.267151][ T288] ? __schedule+0xb76/0x14c0 [ 20.271712][ T288] ? _raw_spin_lock_irqsave+0x110/0x110 [ 20.277224][ T288] ? cgroup_update_frozen+0x15c/0x970 [ 20.282568][ T288] ? ptrace_stop+0x6f4/0xa80 [ 20.287134][ T288] ? __kasan_check_read+0x11/0x20 [ 20.292126][ T288] ? __fdget+0x15b/0x230 [ 20.296339][ T288] __x64_sys_sendmsg+0x1e2/0x2a0 [ 20.301248][ T288] ? ___sys_sendmsg+0x260/0x260 [ 20.306067][ T288] ? __kasan_check_write+0x14/0x20 [ 20.311145][ T288] ? switch_fpu_return+0x15d/0x2c0 [ 20.316228][ T288] x64_sys_call+0x4b/0x9a0 [ 20.320615][ T288] do_syscall_64+0x4c/0xa0 [ 20.325002][ T288] ? clear_bhb_loop+0x50/0xa0 [ 20.329649][ T288] ? clear_bhb_loop+0x50/0xa0 [ 20.334295][ T288] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 20.340157][ T288] RIP: 0033:0x7f249c0745a9 [ 20.344540][ T288] 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 [ 20.364121][ T288] RSP: 002b:00007ffdef653c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 20.372509][ T288] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f249c0745a9 [ 20.380453][ T288] RDX: 0000000000004000 RSI: 0000200000000280 RDI: 0000000000000003 [ 20.388397][ T288] RBP: 00007f249c0e7610 R08: 0000000000000001 R09: 00000000000ac5f8 [ 20.396342][ T288] R10: 000000000000000a R11: 0000000000000246 R12: 0000000000000001 [ 20.404283][ T288] R13: 00007ffdef653e48 R14: 0000200000000788 R15: 0000000000000001 [ 20.412228][ T288] [ 20.415219][ T288] Modules linked in: [ 20.419150][ T288] ---[ end trace 52f0b48c1e49cfc8 ]--- [ 20.423039][ T30] audit: type=1400 audit(1752661638.517:65): avc: denied { read } for pid=83 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 [ 20.424595][ T288] RIP: 0010:qdisc_tree_reduce_backlog+0x181/0x340 [ 20.446353][ T30] audit: type=1400 audit(1752661638.517:66): avc: denied { search } for pid=83 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 [ 20.452597][ T288] Code: e8 f4 89 d7 fd 4d 89 ef 83 7d d0 00 74 0a e8 d6 12 99 fd e9 80 00 00 00 4d 8b 36 49 8d 46 20 48 89 c1 48 c1 e9 03 48 89 4d b8 <80> 3c 19 00 48 89 45 d0 74 0d 48 8b 7d d0 e8 bc 89 d7 fd 48 8b 45 [ 20.473884][ T30] audit: type=1400 audit(1752661638.517:67): avc: denied { write } for pid=83 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 [ 20.493346][ T288] RSP: 0018:ffffc900009c6f08 EFLAGS: 00010202 [ 20.514579][ T30] audit: type=1400 audit(1752661638.517:68): avc: denied { add_name } for pid=83 comm="syslogd" name="messages" scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 20.520472][ T288] RAX: 0000000000000020 RBX: dffffc0000000000 RCX: 0000000000000004 [ 20.520486][ T288] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 20.541042][ T30] audit: type=1400 audit(1752661638.517:69): avc: denied { create } for pid=83 comm="syslogd" name="messages" scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 20.548813][ T288] RBP: ffffc900009c6f50 R08: ffff8881057a4f00 R09: 0000000000000002 [ 20.556859][ T30] audit: type=1400 audit(1752661638.517:70): avc: denied { append open } for pid=83 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 [ 20.577049][ T288] R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000000affe0 [ 20.577062][ T288] R13: ffff8881059fec00 R14: 0000000000000000 R15: ffff8881059fec00 [ 20.585283][ T30] audit: type=1400 audit(1752661638.517:71): avc: denied { getattr } for pid=83 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 [ 20.607737][ T288] FS: 000055555fbf5380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 20.654947][ T288] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.661535][ T288] CR2: 000055ea3da3b028 CR3: 00000001219d8000 CR4: 00000000003506b0 [ 20.669517][ T288] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.677471][ T288] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.685437][ T288] Kernel panic - not syncing: Fatal exception in interrupt [ 20.692703][ T288] Kernel Offset: disabled [ 20.697008][ T288] Rebooting in 86400 seconds..