./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3742867024 <...> Warning: Permanently added '10.128.0.62' (ED25519) to the list of known hosts. execve("./syz-executor3742867024", ["./syz-executor3742867024"], 0x7ffde12cb9b0 /* 10 vars */) = 0 brk(NULL) = 0x55555b6b1000 brk(0x55555b6b1d00) = 0x55555b6b1d00 arch_prctl(ARCH_SET_FS, 0x55555b6b1380) = 0 set_tid_address(0x55555b6b1650) = 5835 set_robust_list(0x55555b6b1660, 24) = 0 rseq(0x55555b6b1ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3742867024", 4096) = 28 getrandom("\xa5\xbf\xc8\x92\xba\xcb\xcd\x04", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555b6b1d00 brk(0x55555b6d2d00) = 0x55555b6d2d00 brk(0x55555b6d3000) = 0x55555b6d3000 mprotect(0x7f79d717d000, 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 socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 4 socketpair(AF_UNIX, SOCK_SEQPACKET, 0, [5, 6]) = 0 ioctl(6, SIOCGIFINDEX, {ifr_name="lo", ifr_ifindex=1}) = 0 sendmsg(4, {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\x08\x00\x01\x00\x68\x68\x66\x00\x14\x00\x02\x00\x08\x00\x01\x00\x34\x06\x00\x00\x08\x00\x03\x00\x84\x00\x00\x00", iov_len=64}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_BATCH}, MSG_EOR|MSG_CONFIRM|MSG_NOSIGNAL|MSG_BATCH) = 64 socketpair(AF_UNIX, SOCK_SEQPACKET, 0, [7, 8]) = 0 ioctl(8, SIOCGIFINDEX, {ifr_name="lo", ifr_ifindex=1}) = 0 [ 94.332226][ T5835] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN PTI [ 94.344610][ T5835] KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] [ 94.353401][ T5835] CPU: 0 UID: 0 PID: 5835 Comm: syz-executor374 Not tainted 6.16.0-rc3-syzkaller-00144-gbd475eeaaf3c #0 PREEMPT(full) [ 94.365854][ T5835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 94.376196][ T5835] RIP: 0010:qdisc_tree_reduce_backlog+0x223/0x480 [ 94.382672][ T5835] Code: 89 ef e8 40 80 b3 f8 4d 89 ef 85 db 74 0d e8 74 fc 4f f8 4c 89 f5 e9 88 00 00 00 48 8b 6d 00 48 8d 45 20 48 89 c3 48 c1 eb 03 <42> 80 3c 33 00 48 89 04 24 74 0d 48 8b 3c 24 e8 09 80 b3 f8 48 8b [ 94.402538][ T5835] RSP: 0018:ffffc900040bf0a8 EFLAGS: 00010202 [ 94.408726][ T5835] RAX: 0000000000000020 RBX: 0000000000000004 RCX: 0000000000000000 [ 94.418016][ T5835] RDX: ffff888031da3c00 RSI: 0000000000000000 RDI: 0000000000000000 [ 94.426025][ T5835] RBP: 0000000000000000 R08: ffff888031da3c00 R09: 0000000000000002 [ 94.434518][ T5835] R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000000afff2 [ 94.443044][ T5835] R13: ffff88802875a000 R14: dffffc0000000000 R15: ffff88802875a000 [ 94.451336][ T5835] FS: 000055555b6b1380(0000) GS:ffff888125c50000(0000) knlGS:0000000000000000 [ 94.461527][ T5835] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.468670][ T5835] CR2: 0000200000000240 CR3: 00000000726c2000 CR4: 00000000003526f0 [ 94.477106][ T5835] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 94.485721][ T5835] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 94.493731][ T5835] Call Trace: [ 94.497594][ T5835] [ 94.500956][ T5835] ? qdisc_tree_reduce_backlog+0x3c/0x480 [ 94.507012][ T5835] fq_codel_change+0xa96/0xef0 [ 94.511799][ T5835] ? __kmalloc_cache_noprof+0x230/0x3d0 [ 94.517372][ T5835] ? __pfx_fq_codel_change+0x10/0x10 [ 94.522810][ T5835] ? __sock_sendmsg+0x21c/0x270 [ 94.527705][ T5835] fq_codel_init+0x355/0x960 [ 94.532444][ T5835] ? lockdep_rtnl_is_held+0x26/0x40 [ 94.537689][ T5835] ? __pfx_fq_codel_init+0x10/0x10 [ 94.542990][ T5835] qdisc_create+0x7ac/0xea0 [ 94.547702][ T5835] tc_modify_qdisc+0x1426/0x2010 [ 94.552884][ T5835] ? __pfx_tc_modify_qdisc+0x10/0x10 [ 94.558833][ T5835] ? __pfx_tc_modify_qdisc+0x10/0x10 [ 94.564233][ T5835] rtnetlink_rcv_msg+0x779/0xb70 [ 94.569187][ T5835] ? rtnetlink_rcv_msg+0x1ab/0xb70 [ 94.574440][ T5835] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 94.580019][ T5835] netlink_rcv_skb+0x208/0x470 [ 94.584824][ T5835] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 94.590311][ T5835] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 94.595665][ T5835] ? netlink_deliver_tap+0x2e/0x1b0 [ 94.601065][ T5835] ? netlink_deliver_tap+0x2e/0x1b0 [ 94.606289][ T5835] netlink_unicast+0x75b/0x8d0 [ 94.611166][ T5835] netlink_sendmsg+0x805/0xb30 [ 94.615964][ T5835] ? __pfx_netlink_sendmsg+0x10/0x10 [ 94.621279][ T5835] ? aa_sock_msg_perm+0x94/0x160 [ 94.626874][ T5835] ? bpf_lsm_socket_sendmsg+0x9/0x20 [ 94.632807][ T5835] ? __pfx_netlink_sendmsg+0x10/0x10 [ 94.638146][ T5835] __sock_sendmsg+0x21c/0x270 [ 94.642878][ T5835] ____sys_sendmsg+0x505/0x830 [ 94.647684][ T5835] ? __pfx_____sys_sendmsg+0x10/0x10 [ 94.653010][ T5835] ? import_iovec+0x74/0xa0 [ 94.657550][ T5835] ___sys_sendmsg+0x21f/0x2a0 [ 94.662341][ T5835] ? __pfx____sys_sendmsg+0x10/0x10 [ 94.667583][ T5835] ? do_raw_spin_lock+0x121/0x290 [ 94.673185][ T5835] __x64_sys_sendmsg+0x19b/0x260 [ 94.678255][ T5835] ? _raw_spin_unlock_irq+0x2e/0x50 [ 94.683596][ T5835] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 94.689092][ T5835] ? rcu_is_watching+0x15/0xb0 [ 94.693988][ T5835] do_syscall_64+0xfa/0x3b0 [ 94.698514][ T5835] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.704613][ T5835] ? asm_common_interrupt+0x26/0x40 [ 94.709843][ T5835] ? clear_bhb_loop+0x60/0xb0 [ 94.714708][ T5835] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.720625][ T5835] RIP: 0033:0x7f79d710a6a9 [ 94.725067][ T5835] 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 [ 94.744955][ T5835] RSP: 002b:00007fff2ee70668 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 94.753384][ T5835] RAX: ffffffffffffffda RBX: 00007fff2ee70838 RCX: 00007f79d710a6a9 [ 94.761368][ T5835] RDX: 0000000000000800 RSI: 0000200000000100 RDI: 0000000000000003 [ 94.769373][ T5835] RBP: 00007f79d717d610 R08: 0000000000000004 R09: 00007fff2ee70838 [ 94.777473][ T5835] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000001 [ 94.785489][ T5835] R13: 00007fff2ee70828 R14: 0000000000000001 R15: 0000000000000001 [ 94.793671][ T5835] [ 94.796720][ T5835] Modules linked in: [ 94.800736][ T5835] ---[ end trace 0000000000000000 ]--- [ 94.806249][ T5835] RIP: 0010:qdisc_tree_reduce_backlog+0x223/0x480 [ 94.812751][ T5835] Code: 89 ef e8 40 80 b3 f8 4d 89 ef 85 db 74 0d e8 74 fc 4f f8 4c 89 f5 e9 88 00 00 00 48 8b 6d 00 48 8d 45 20 48 89 c3 48 c1 eb 03 <42> 80 3c 33 00 48 89 04 24 74 0d 48 8b 3c 24 e8 09 80 b3 f8 48 8b [ 94.832480][ T5835] RSP: 0018:ffffc900040bf0a8 EFLAGS: 00010202 [ 94.838645][ T5835] RAX: 0000000000000020 RBX: 0000000000000004 RCX: 0000000000000000 [ 94.846645][ T5835] RDX: ffff888031da3c00 RSI: 0000000000000000 RDI: 0000000000000000 [ 94.855152][ T5835] RBP: 0000000000000000 R08: ffff888031da3c00 R09: 0000000000000002 [ 94.863281][ T5835] R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000000afff2 [ 94.871579][ T5835] R13: ffff88802875a000 R14: dffffc0000000000 R15: ffff88802875a000 [ 94.879862][ T5835] FS: 000055555b6b1380(0000) GS:ffff888125c50000(0000) knlGS:0000000000000000 [ 94.888831][ T5835] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.895563][ T5835] CR2: 0000200000000240 CR3: 00000000726c2000 CR4: 00000000003526f0 [ 94.903788][ T5835] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 94.912221][ T5835] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 94.921185][ T5835] Kernel panic - not syncing: Fatal exception in interrupt [ 94.929517][ T5835] Kernel Offset: disabled [ 94.934237][ T5835] Rebooting in 86400 seconds..