./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4236508531 <...> Warning: Permanently added '10.128.0.193' (ED25519) to the list of known hosts. execve("./syz-executor4236508531", ["./syz-executor4236508531"], 0x7ffcfd4da290 /* 10 vars */) = 0 brk(NULL) = 0x555584a72000 brk(0x555584a72d00) = 0x555584a72d00 arch_prctl(ARCH_SET_FS, 0x555584a72380) = 0 set_tid_address(0x555584a72650) = 290 set_robust_list(0x555584a72660, 24) = 0 rseq(0x555584a72ca0, 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-executor4236508531", 4096) = 28 getrandom("\x6b\x34\x8e\x31\x82\x62\xba\x90", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555584a72d00 brk(0x555584a93d00) = 0x555584a93d00 brk(0x555584a94000) = 0x555584a94000 mprotect(0x7f856aa23000, 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, 0executing program ) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 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="\x34\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\x0e\x00\x01\x00\x62\x6c\x61\x63\x6b\x68\x6f\x6c\x65\x00\x00\x00", iov_len=52}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, MSG_EOR|MSG_NOSIGNAL|MSG_BATCH) = 52 [ 23.163100][ T28] audit: type=1400 audit(1755213538.089:64): avc: denied { execmem } for pid=290 comm="syz-executor423" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.183069][ T290] general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN [ 23.194805][ T290] KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] [ 23.203201][ T290] CPU: 0 PID: 290 Comm: syz-executor423 Not tainted 6.1.145-syzkaller-00004-g82186ba31010 #0 [ 23.213523][ T290] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 23.223705][ T290] RIP: 0010:qdisc_tree_reduce_backlog+0x181/0x360 [ 23.230132][ T290] Code: e8 24 b3 b4 fd 4d 89 ef 83 7d d0 00 74 0a e8 c6 4f 70 fd e9 a2 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 ec b2 b4 fd 48 8b 45 [ 23.249723][ T290] RSP: 0018:ffffc90000e36e68 EFLAGS: 00010202 [ 23.255795][ T290] RAX: 0000000000000020 RBX: dffffc0000000000 RCX: 0000000000000004 [ 23.263759][ T290] RDX: ffff88811218a880 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.271814][ T290] RBP: ffffc90000e36eb0 R08: ffff88811218a880 R09: 0000000000000002 [ 23.279800][ T290] R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000000afff2 [ 23.287856][ T290] R13: ffff8881115ef800 R14: 0000000000000000 R15: ffff8881115ef800 [ 23.295868][ T290] FS: 0000555584a72380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 23.304895][ T290] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.311458][ T290] CR2: 00007f856a9e8fe0 CR3: 00000001221db000 CR4: 00000000003506b0 [ 23.319469][ T290] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.327593][ T290] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.335633][ T290] Call Trace: [ 23.338890][ T290] [ 23.341895][ T290] codel_change+0x8b8/0xbf0 [ 23.346378][ T290] ? qdisc_alloc+0x588/0x780 [ 23.350945][ T290] ? qdisc_create+0x170/0x1040 [ 23.355684][ T290] ? rtnetlink_rcv_msg+0x9f4/0xcf0 [ 23.360799][ T290] ? netlink_rcv_skb+0x1f2/0x440 [ 23.365803][ T290] ? rtnetlink_rcv+0x1c/0x20 [ 23.370366][ T290] ? netlink_unicast+0x8b1/0xa30 [ 23.375271][ T290] ? netlink_sendmsg+0x8aa/0xbc0 [ 23.380183][ T290] ? ____sys_sendmsg+0x5a9/0x990 [ 23.385099][ T290] ? ___sys_sendmsg+0x21c/0x290 [ 23.389949][ T290] ? __x64_sys_sendmsg+0x1f0/0x2c0 [ 23.395079][ T290] ? __cfi_codel_change+0x10/0x10 [ 23.400116][ T290] ? __kasan_check_write+0x14/0x20 [ 23.405240][ T290] codel_init+0x1ea/0x410 [ 23.409657][ T290] ? __cfi_codel_init+0x10/0x10 [ 23.414590][ T290] qdisc_create+0x7f3/0x1040 [ 23.419263][ T290] ? qdisc_notify+0x360/0x360 [ 23.424038][ T290] ? qdisc_lookup+0x100/0x4e0 [ 23.428710][ T290] tc_modify_qdisc+0x8ea/0x1900 [ 23.433736][ T290] ? __cfi_tc_modify_qdisc+0x10/0x10 [ 23.439023][ T290] ? __kasan_check_write+0x14/0x20 [ 23.444138][ T290] ? mutex_lock+0x8d/0x1a0 [ 23.448593][ T290] ? __cfi_mutex_lock+0x10/0x10 [ 23.453441][ T290] ? ns_capable+0x8c/0xf0 [ 23.457763][ T290] ? netlink_net_capable+0x125/0x160 [ 23.463044][ T290] ? __cfi_tc_modify_qdisc+0x10/0x10 [ 23.468323][ T290] rtnetlink_rcv_msg+0x9f4/0xcf0 [ 23.473281][ T290] ? __cfi_rtnetlink_rcv_msg+0x10/0x10 [ 23.478908][ T290] ? kernel_text_address+0xa0/0xd0 [ 23.484110][ T290] ? __kernel_text_address+0xd/0x30 [ 23.489408][ T290] ? unwind_get_return_address+0x4d/0x90 [ 23.495067][ T290] ? memcpy+0x56/0x70 [ 23.499071][ T290] ? avc_has_perm_noaudit+0x2f4/0x460 [ 23.504557][ T290] ? __cfi_avc_has_perm_noaudit+0x10/0x10 [ 23.510387][ T290] ? slab_post_alloc_hook+0x4f/0x2d0 [ 23.515697][ T290] ? kmem_cache_alloc_node+0x181/0x340 [ 23.521190][ T290] ? __alloc_skb+0xea/0x4b0 [ 23.525789][ T290] ? avc_has_perm+0x158/0x240 [ 23.530472][ T290] ? __alloc_skb+0x236/0x4b0 [ 23.535085][ T290] ? netlink_sendmsg+0x626/0xbc0 [ 23.540030][ T290] ? __cfi_avc_has_perm+0x10/0x10 [ 23.545053][ T290] ? selinux_nlmsg_lookup+0x400/0x4c0 [ 23.550622][ T290] netlink_rcv_skb+0x1f2/0x440 [ 23.555691][ T290] ? __cfi_rtnetlink_rcv_msg+0x10/0x10 [ 23.561275][ T290] ? __cfi_netlink_rcv_skb+0x10/0x10 [ 23.567105][ T290] ? __netlink_lookup+0x387/0x3b0 [ 23.572134][ T290] rtnetlink_rcv+0x1c/0x20 [ 23.576578][ T290] netlink_unicast+0x8b1/0xa30 [ 23.581345][ T290] netlink_sendmsg+0x8aa/0xbc0 [ 23.586117][ T290] ? __cfi_netlink_sendmsg+0x10/0x10 [ 23.591419][ T290] ? security_socket_sendmsg+0x93/0xb0 [ 23.596911][ T290] ? __cfi_netlink_sendmsg+0x10/0x10 [ 23.602212][ T290] ____sys_sendmsg+0x5a9/0x990 [ 23.606981][ T290] ? __sys_sendmsg_sock+0x40/0x40 [ 23.612011][ T290] ? import_iovec+0x7c/0xb0 [ 23.616638][ T290] ___sys_sendmsg+0x21c/0x290 [ 23.621418][ T290] ? __sys_sendmsg+0x270/0x270 [ 23.626203][ T290] ? finish_task_switch+0x16b/0x7b0 [ 23.631475][ T290] ? __schedule+0xb8f/0x14e0 [ 23.636170][ T290] ? memset+0x35/0x40 [ 23.640157][ T290] ? __kasan_check_read+0x11/0x20 [ 23.645196][ T290] ? __fdget+0x15b/0x220 [ 23.649429][ T290] __x64_sys_sendmsg+0x1f0/0x2c0 [ 23.654361][ T290] ? _raw_spin_unlock_irq+0x4d/0x70 [ 23.659574][ T290] ? __cfi___x64_sys_sendmsg+0x10/0x10 [ 23.665032][ T290] ? fpregs_restore_userregs+0x128/0x260 [ 23.670671][ T290] x64_sys_call+0x171/0x9a0 [ 23.675257][ T290] do_syscall_64+0x4c/0xa0 [ 23.679675][ T290] ? clear_bhb_loop+0x30/0x80 [ 23.684351][ T290] ? clear_bhb_loop+0x30/0x80 [ 23.689137][ T290] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 23.695140][ T290] RIP: 0033:0x7f856a9b05e9 [ 23.699648][ T290] 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 [ 23.719348][ T290] RSP: 002b:00007fffa8236df8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 23.727863][ T290] RAX: ffffffffffffffda RBX: 00007fffa8236fc8 RCX: 00007f856a9b05e9 [ 23.735834][ T290] RDX: 0000000000000800 RSI: 0000200000000100 RDI: 0000000000000003 [ 23.743806][ T290] RBP: 00007f856aa23610 R08: 000000000000000a R09: 00007fffa8236fc8 [ 23.751782][ T290] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 23.759760][ T290] R13: 00007fffa8236fb8 R14: 0000000000000001 R15: 0000000000000001 [ 23.767734][ T290] [ 23.770758][ T290] Modules linked in: [ 23.774690][ T290] ---[ end trace 0000000000000000 ]--- [ 23.780287][ T290] RIP: 0010:qdisc_tree_reduce_backlog+0x181/0x360 [ 23.780348][ T28] audit: type=1400 audit(1755213538.709:65): 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 [ 23.786730][ T290] Code: e8 24 b3 b4 fd 4d 89 ef 83 7d d0 00 74 0a e8 c6 4f 70 fd e9 a2 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 ec b2 b4 fd 48 8b 45 [ 23.808741][ T28] audit: type=1400 audit(1755213538.709:66): 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 [ 23.828213][ T290] RSP: 0018:ffffc90000e36e68 EFLAGS: 00010202 [ 23.849765][ T28] audit: type=1400 audit(1755213538.709:67): 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 [ 23.855611][ T290] RAX: 0000000000000020 RBX: dffffc0000000000 RCX: 0000000000000004 [ 23.877231][ T28] audit: type=1400 audit(1755213538.709:68): 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 [ 23.885039][ T290] RDX: ffff88811218a880 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.905942][ T28] audit: type=1400 audit(1755213538.709:69): 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 [ 23.913809][ T290] RBP: ffffc90000e36eb0 R08: ffff88811218a880 R09: 0000000000000002 [ 23.934696][ T28] audit: type=1400 audit(1755213538.709:70): 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 [ 23.942461][ T290] R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000000afff2 [ 23.942477][ T290] R13: ffff8881115ef800 R14: 0000000000000000 R15: ffff8881115ef800 [ 23.965477][ T28] audit: type=1400 audit(1755213538.709:71): 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 [ 23.973368][ T290] FS: 0000555584a72380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 24.012739][ T290] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.019365][ T290] CR2: 00007f856a9e8fe0 CR3: 00000001221db000 CR4: 00000000003506b0 [ 24.027357][ T290] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.035311][ T290] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.043428][ T290] Kernel panic - not syncing: Fatal exception in interrupt [ 24.050869][ T290] Kernel Offset: disabled [ 24.055211][ T290] Rebooting in 86400 seconds..