./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3097649516 <...> Warning: Permanently added '10.128.1.85' (ED25519) to the list of known hosts. execve("./syz-executor3097649516", ["./syz-executor3097649516"], 0x7ffc8bef2280 /* 10 vars */) = 0 brk(NULL) = 0x55555666f000 brk(0x55555666fd00) = 0x55555666fd00 arch_prctl(ARCH_SET_FS, 0x55555666f380) = 0 set_tid_address(0x55555666f650) = 290 set_robust_list(0x55555666f660, 24) = 0 rseq(0x55555666fca0, 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-executor3097649516", 4096) = 28 getrandom("\x56\x31\xf5\x81\x48\x5c\x31\x25", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555666fd00 brk(0x555556690d00) = 0x555556690d00 brk(0x555556691000) = 0x555556691000 mprotect(0x7f42250dd000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 executing program 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", 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 [ 22.797147][ T28] audit: type=1400 audit(1753528779.691:64): avc: denied { execmem } for pid=290 comm="syz-executor309" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.817061][ T290] netlink: 4 bytes leftover after parsing attributes in process `syz-executor309'. [ 22.826681][ T290] general protection fault, probably for non-canonical address 0xdffffc0000000037: 0000 [#1] PREEMPT SMP KASAN [ 22.838372][ T290] KASAN: null-ptr-deref in range [0x00000000000001b8-0x00000000000001bf] [ 22.846756][ T290] CPU: 1 PID: 290 Comm: syz-executor309 Not tainted 6.1.145-syzkaller-00015-g2ff414a09808 #0 [ 22.856880][ T290] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 22.866933][ T290] RIP: 0010:htb_qlen_notify+0x30/0xc0 [ 22.872300][ T290] 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 [ 22.891880][ T290] RSP: 0018:ffffc90000e86ea8 EFLAGS: 00010202 [ 22.897930][ T290] RAX: ffffffff8400ef52 RBX: 0000000000000037 RCX: ffff88810e63d100 [ 22.905874][ T290] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88810d8d4000 [ 22.913822][ T290] RBP: ffffc90000e86ed0 R08: ffff88810e63d100 R09: 0000000000000002 [ 22.921766][ T290] R10: 0000000000000000 R11: ffffffff8400ef30 R12: dffffc0000000000 [ 22.929713][ T290] R13: 00000000000001b8 R14: 0000000000000000 R15: ffff88810d8d4000 [ 22.937658][ T290] FS: 000055555666f380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 22.946559][ T290] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.953113][ T290] CR2: 000055e2d58c4eb8 CR3: 0000000121829000 CR4: 00000000003506a0 [ 22.961058][ T290] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.969011][ T290] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.976956][ T290] Call Trace: [ 22.980210][ T290] [ 22.983117][ T290] qdisc_tree_reduce_backlog+0x20a/0x360 [ 22.988728][ T290] sfq_init+0x1b59/0x2870 [ 22.993033][ T290] ? ___sys_sendmsg+0x21c/0x290 [ 22.997861][ T290] ? __cfi_sfq_init+0x10/0x10 [ 23.002510][ T290] qdisc_create+0x7f3/0x1040 [ 23.007079][ T290] ? qdisc_notify+0x360/0x360 [ 23.011733][ T290] ? qdisc_lookup+0x319/0x4e0 [ 23.016383][ T290] tc_modify_qdisc+0x8ea/0x1900 [ 23.021209][ T290] ? __cfi_tc_modify_qdisc+0x10/0x10 [ 23.026468][ T290] ? __kasan_check_write+0x14/0x20 [ 23.031554][ T290] ? mutex_lock+0x8d/0x1a0 [ 23.035941][ T290] ? __cfi_mutex_lock+0x10/0x10 [ 23.040765][ T290] ? ns_capable+0x8c/0xf0 [ 23.045065][ T290] ? netlink_net_capable+0x125/0x160 [ 23.050760][ T290] ? __cfi_tc_modify_qdisc+0x10/0x10 [ 23.056018][ T290] rtnetlink_rcv_msg+0x9f4/0xcf0 [ 23.060932][ T290] ? __cfi_rtnetlink_rcv_msg+0x10/0x10 [ 23.066364][ T290] ? kernel_text_address+0xa0/0xd0 [ 23.071450][ T290] ? __kernel_text_address+0xd/0x30 [ 23.076620][ T290] ? unwind_get_return_address+0x4d/0x90 [ 23.082224][ T290] ? memcpy+0x56/0x70 [ 23.086191][ T290] ? avc_has_perm_noaudit+0x2f4/0x460 [ 23.091545][ T290] ? __cfi_avc_has_perm_noaudit+0x10/0x10 [ 23.097244][ T290] ? slab_post_alloc_hook+0x4f/0x2d0 [ 23.102507][ T290] ? kmem_cache_alloc_node+0x181/0x340 [ 23.107943][ T290] ? __alloc_skb+0xea/0x4b0 [ 23.112430][ T290] ? avc_has_perm+0x158/0x240 [ 23.117086][ T290] ? __alloc_skb+0x236/0x4b0 [ 23.121656][ T290] ? netlink_sendmsg+0x626/0xbc0 [ 23.126579][ T290] ? __cfi_avc_has_perm+0x10/0x10 [ 23.131585][ T290] ? selinux_nlmsg_lookup+0x400/0x4c0 [ 23.136941][ T290] netlink_rcv_skb+0x1f2/0x440 [ 23.141687][ T290] ? __cfi_rtnetlink_rcv_msg+0x10/0x10 [ 23.147122][ T290] ? __cfi_netlink_rcv_skb+0x10/0x10 [ 23.152389][ T290] ? __netlink_lookup+0x387/0x3b0 [ 23.157396][ T290] rtnetlink_rcv+0x1c/0x20 [ 23.161791][ T290] netlink_unicast+0x8b1/0xa30 [ 23.166534][ T290] netlink_sendmsg+0x8aa/0xbc0 [ 23.171281][ T290] ? __cfi_netlink_sendmsg+0x10/0x10 [ 23.176551][ T290] ? security_socket_sendmsg+0x93/0xb0 [ 23.181992][ T290] ? __cfi_netlink_sendmsg+0x10/0x10 [ 23.187258][ T290] ____sys_sendmsg+0x5a9/0x990 [ 23.192001][ T290] ? __sys_sendmsg_sock+0x40/0x40 [ 23.197002][ T290] ? import_iovec+0x7c/0xb0 [ 23.201494][ T290] ___sys_sendmsg+0x21c/0x290 [ 23.206151][ T290] ? __sys_sendmsg+0x270/0x270 [ 23.210893][ T290] ? finish_task_switch+0x16b/0x7b0 [ 23.216075][ T290] ? __schedule+0xb8f/0x14e0 [ 23.220654][ T290] ? memset+0x35/0x40 [ 23.224619][ T290] ? __kasan_check_read+0x11/0x20 [ 23.229624][ T290] ? __fdget+0x15b/0x220 [ 23.233858][ T290] __x64_sys_sendmsg+0x1f0/0x2c0 [ 23.238776][ T290] ? _raw_spin_unlock_irq+0x4d/0x70 [ 23.243956][ T290] ? __cfi___x64_sys_sendmsg+0x10/0x10 [ 23.249395][ T290] ? fpregs_restore_userregs+0x128/0x260 [ 23.255011][ T290] x64_sys_call+0x171/0x9a0 [ 23.259496][ T290] do_syscall_64+0x4c/0xa0 [ 23.263895][ T290] ? clear_bhb_loop+0x30/0x80 [ 23.268550][ T290] ? clear_bhb_loop+0x30/0x80 [ 23.273204][ T290] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 23.279073][ T290] RIP: 0033:0x7f422506a6a9 [ 23.283476][ 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 [ 23.303062][ T290] RSP: 002b:00007ffc1254dcb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 23.311454][ T290] RAX: ffffffffffffffda RBX: 00007ffc1254de88 RCX: 00007f422506a6a9 [ 23.319403][ T290] RDX: 0000000000004000 RSI: 0000200000000040 RDI: 0000000000000006 [ 23.327350][ T290] RBP: 00007f42250dd610 R08: 000000000000000a R09: 00007ffc1254de88 [ 23.335302][ T290] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000001 [ 23.343251][ T290] R13: 00007ffc1254de78 R14: 0000000000000001 R15: 0000000000000001 [ 23.351204][ T290] [ 23.354206][ T290] Modules linked in: [ 23.358170][ T290] ---[ end trace 0000000000000000 ]--- [ 23.359715][ T28] audit: type=1400 audit(1753528780.261:65): avc: denied { read } for pid=85 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 [ 23.363635][ T290] RIP: 0010:htb_qlen_notify+0x30/0xc0 [ 23.390595][ T290] 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 [ 23.410207][ T28] audit: type=1400 audit(1753528780.261:66): avc: denied { search } for pid=85 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 [ 23.410224][ T290] RSP: 0018:ffffc90000e86ea8 EFLAGS: 00010202 [ 23.431429][ T290] RAX: ffffffff8400ef52 RBX: 0000000000000037 RCX: ffff88810e63d100 [ 23.431446][ T290] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88810d8d4000 [ 23.431456][ T290] RBP: ffffc90000e86ed0 R08: ffff88810e63d100 R09: 0000000000000002 [ 23.445634][ T28] audit: type=1400 audit(1753528780.261:67): avc: denied { write } for pid=85 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 [ 23.453447][ T290] R10: 0000000000000000 R11: ffffffff8400ef30 R12: dffffc0000000000 [ 23.461571][ T28] audit: type=1400 audit(1753528780.261:68): avc: denied { add_name } for pid=85 comm="syslogd" name="messages" scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 23.482492][ T290] R13: 00000000000001b8 R14: 0000000000000000 R15: ffff88810d8d4000 [ 23.490612][ T28] audit: type=1400 audit(1753528780.261:69): avc: denied { create } for pid=85 comm="syslogd" name="messages" scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 23.510856][ T290] FS: 000055555666f380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 23.519093][ T28] audit: type=1400 audit(1753528780.261:70): avc: denied { append open } for pid=85 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 [ 23.539125][ T290] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.539141][ T290] CR2: 000055e2d58c4eb8 CR3: 0000000121829000 CR4: 00000000003506a0 [ 23.548342][ T28] audit: type=1400 audit(1753528780.261:71): avc: denied { getattr } for pid=85 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 [ 23.570833][ T290] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.570850][ T290] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.623665][ T290] Kernel panic - not syncing: Fatal exception in interrupt [ 23.631040][ T290] Kernel Offset: disabled [ 23.635344][ T290] Rebooting in 86400 seconds..