./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor938696264 <...> Warning: Permanently added '10.128.0.5' (ED25519) to the list of known hosts. execve("./syz-executor938696264", ["./syz-executor938696264"], 0x7ffc3d144a10 /* 10 vars */) = 0 brk(NULL) = 0x555594989000 brk(0x555594989d00) = 0x555594989d00 arch_prctl(ARCH_SET_FS, 0x555594989380) = 0 set_tid_address(0x555594989650) = 5840 set_robust_list(0x555594989660, 24) = 0 rseq(0x555594989ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor938696264", 4096) = 27 getrandom("\x43\x4a\x97\x74\xbd\x86\x06\xfd", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555594989d00 brk(0x5555949aad00) = 0x5555949aad00 brk(0x5555949ab000) = 0x5555949ab000 mprotect(0x7f8b3c563000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5841 attached , child_tidptr=0x555594989650) = 5841 [pid 5841] set_robust_list(0x555594989660, 24) = 0 [pid 5841] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5841] getppid() = 0 [pid 5841] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5841] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5841] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5841] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5841] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5841] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5841] unshare(CLONE_NEWNS) = 0 [pid 5841] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5841] unshare(CLONE_NEWIPC) = 0 [pid 5841] unshare(CLONE_NEWCGROUP) = 0 [pid 5841] unshare(CLONE_NEWUTS) = 0 [pid 5841] unshare(CLONE_SYSVSEM) = 0 [pid 5841] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5841] write(3, "16777216", 8) = 8 [pid 5841] close(3) = 0 [pid 5841] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5841] write(3, "536870912", 9) = 9 [pid 5841] close(3) = 0 [pid 5841] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5841] write(3, "1024", 4) = 4 [pid 5841] close(3) = 0 [pid 5841] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5841] write(3, "8192", 4) = 4 [pid 5841] close(3) = 0 [pid 5841] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5841] write(3, "1024", 4) = 4 [pid 5841] close(3) = 0 [pid 5841] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5841] write(3, "1024", 4) = 4 [pid 5841] close(3) = 0 [pid 5841] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5841] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5841] close(3) = 0 [pid 5841] getpid() = 1 [pid 5841] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<mc_ifc_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 [ 73.306263][ T5849] #2: ffff888078919538 (&idev->mc_lock){+.+.}-{3:3}, at: mld_ifc_work+0x2d/0xd90 [ 73.315475][ T5849] #3: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: mld_sendpack+0x1e8/0xdb0 [ 73.324681][ T5849] #4: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: ip6_finish_output2+0x75c/0x1730 [ 73.334529][ T5849] #5: ffffffff8e937e00 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x2da/0x3ed0 [ 73.344467][ T5849] #6: ffff88805a40cd18 (&qdisc_xmit_lock_key#2){+.-.}-{2:2}, at: __dev_queue_xmit+0x17ca/0x3ed0 [ 73.355079][ T5849] #7: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: ip_finish_output2+0x45f/0x1390 [ 73.364815][ T5849] #8: ffffffff8e937e00 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x2da/0x3ed0 [ 73.374720][ T5849] #9: ffff88807e8ea258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#2){+...}-{2:2}, at: __dev_queue_xmit+0x1364/0x3ed0 [ 73.387593][ T5849] [ 73.387593][ T5849] stack backtrace: [ 73.393480][ T5849] CPU: 1 UID: 0 PID: 5849 Comm: kworker/1:4 Not tainted 6.12.0-rc7-syzkaller-00012-g3022e9d00ebe #0 [ 73.404259][ T5849] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 [ 73.414328][ T5849] Workqueue: mld mld_ifc_work [ 73.419014][ T5849] Call Trace: [ 73.422287][ T5849] [ 73.425210][ T5849] dump_stack_lvl+0x241/0x360 [ 73.429895][ T5849] ? __pfx_dump_stack_lvl+0x10/0x10 [ 73.435091][ T5849] ? __pfx__printk+0x10/0x10 [ 73.439679][ T5849] ? lockdep_unlock+0x16a/0x300 [ 73.444547][ T5849] print_deadlock_bug+0x483/0x620 [ 73.449565][ T5849] validate_chain+0x15e2/0x5920 [ 73.454408][ T5849] ? __pfx___bfs+0x10/0x10 [ 73.458813][ T5849] ? __bfs+0x368/0x6f0 [ 73.462865][ T5849] ? __pfx_validate_chain+0x10/0x10 [ 73.468052][ T5849] ? check_path+0x21/0x40 [ 73.472386][ T5849] ? check_noncircular+0x259/0x4a0 [ 73.477488][ T5849] ? __bfs+0x368/0x6f0 [ 73.481545][ T5849] ? __pfx_validate_chain+0x10/0x10 [ 73.486730][ T5849] ? __pfx_validate_chain+0x10/0x10 [ 73.491912][ T5849] ? mark_lock+0x9a/0x360 [ 73.496229][ T5849] ? __pfx_lockdep_unlock+0x10/0x10 [ 73.501414][ T5849] ? __lock_acquire+0x1384/0x2050 [ 73.506432][ T5849] ? mark_lock+0x9a/0x360 [ 73.510763][ T5849] __lock_acquire+0x1384/0x2050 [ 73.515600][ T5849] lock_acquire+0x1ed/0x550 [ 73.520092][ T5849] ? sch_direct_xmit+0x1a7/0x5d0 [ 73.525012][ T5849] ? __pfx_lock_acquire+0x10/0x10 [ 73.530040][ T5849] ? __pfx_validate_xmit_skb+0x10/0x10 [ 73.535496][ T5849] _raw_spin_lock+0x2e/0x40 [ 73.539989][ T5849] ? sch_direct_xmit+0x1a7/0x5d0 [ 73.544949][ T5849] sch_direct_xmit+0x1a7/0x5d0 [ 73.549710][ T5849] ? __pfx_sch_direct_xmit+0x10/0x10 [ 73.554981][ T5849] ? __kasan_slab_alloc+0x66/0x80 [ 73.559999][ T5849] ? kmalloc_reserve+0xa8/0x2a0 [ 73.564851][ T5849] ? __alloc_skb+0x120/0x440 [ 73.569517][ T5849] ? arp_create+0x12d/0x920 [ 73.574011][ T5849] __dev_queue_xmit+0x1a2d/0x3ed0 [ 73.579021][ T5849] ? NF_HOOK+0x9e/0x430 [ 73.583200][ T5849] ? mld_sendpack+0x843/0xdb0 [ 73.587861][ T5849] ? __dev_queue_xmit+0x2da/0x3ed0 [ 73.592955][ T5849] ? __lock_acquire+0x1384/0x2050 [ 73.597969][ T5849] ? __pfx___dev_queue_xmit+0x10/0x10 [ 73.603329][ T5849] ? __pfx_lock_acquire+0x10/0x10 [ 73.608339][ T5849] ? NF_HOOK+0x9f/0x450 [ 73.612476][ T5849] ? __pfx_lock_release+0x10/0x10 [ 73.617487][ T5849] ? __alloc_skb+0x28f/0x440 [ 73.622060][ T5849] NF_HOOK+0x3a5/0x450 [ 73.626116][ T5849] ? __pfx_arp_xmit_finish+0x10/0x10 [ 73.631381][ T5849] ? NF_HOOK+0x9f/0x450 [ 73.635515][ T5849] ? __pfx_NF_HOOK+0x10/0x10 [ 73.640086][ T5849] arp_solicit+0xc64/0xe90 [ 73.644483][ T5849] ? arp_solicit+0x137/0xe90 [ 73.649057][ T5849] ? __pfx_arp_solicit+0x10/0x10 [ 73.654003][ T5849] ? __pfx_lock_release+0x10/0x10 [ 73.659019][ T5849] ? __skb_clone+0x454/0x6c0 [ 73.663597][ T5849] ? __pfx_arp_solicit+0x10/0x10 [ 73.668517][ T5849] __neigh_event_send+0xed4/0x15b0 [ 73.673641][ T5849] neigh_resolve_output+0x1b5/0x740 [ 73.678839][ T5849] ? __pfx_ip_neigh_gw4+0x10/0x10 [ 73.683862][ T5849] ? ip_finish_output2+0x45f/0x1390 [ 73.689051][ T5849] ? ip_finish_output2+0x45f/0x1390 [ 73.694235][ T5849] ip_finish_output2+0xe70/0x1390 [ 73.699244][ T5849] ? nf_hook+0x9e/0x450 [ 73.703381][ T5849] ? __pfx_ip_finish_output2+0x10/0x10 [ 73.708823][ T5849] ? ip_skb_dst_mtu+0x6ba/0x9b0 [ 73.713655][ T5849] ? __ip_finish_output+0x349/0x400 [ 73.718836][ T5849] iptunnel_xmit+0x540/0x9b0 [ 73.723414][ T5849] ip_tunnel_xmit+0x1fb0/0x26a0 [ 73.728255][ T5849] ? __pfx_ip_tunnel_xmit+0x10/0x10 [ 73.733449][ T5849] ? gre_build_header+0x42f/0xb30 [ 73.738460][ T5849] ? __pfx_gre_build_header+0x10/0x10 [ 73.743815][ T5849] ? iptunnel_handle_offloads+0x31b/0x650 [ 73.749520][ T5849] ipgre_xmit+0x8d6/0xc90 [ 73.753834][ T5849] ? __pfx_ipgre_xmit+0x10/0x10 [ 73.758668][ T5849] ? dev_queue_xmit_nit+0x2b/0xc10 [ 73.763777][ T5849] dev_hard_start_xmit+0x27a/0x7e0 [ 73.768878][ T5849] __dev_queue_xmit+0x1b11/0x3ed0 [ 73.774000][ T5849] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 73.779983][ T5849] ? __dev_queue_xmit+0x2da/0x3ed0 [ 73.785094][ T5849] ? __pfx___dev_queue_xmit+0x10/0x10 [ 73.790459][ T5849] ? __local_bh_enable_ip+0x168/0x200 [ 73.795824][ T5849] ? lockdep_hardirqs_on+0x99/0x150 [ 73.801022][ T5849] ? __local_bh_enable_ip+0x168/0x200 [ 73.806387][ T5849] ? ___neigh_create+0x1e39/0x2470 [ 73.811504][ T5849] ? __pfx___local_bh_enable_ip+0x10/0x10 [ 73.817218][ T5849] ? ___neigh_create+0x1e39/0x2470 [ 73.822317][ T5849] ? __ipv6_neigh_lookup_noref+0x52c/0x730 [ 73.828117][ T5849] ip6_finish_output2+0x1001/0x1730 [ 73.833299][ T5849] ? ip6_finish_output2+0x75c/0x1730 [ 73.838593][ T5849] ? __pfx_lock_release+0x10/0x10 [ 73.843603][ T5849] ? __pfx_ip6_finish_output2+0x10/0x10 [ 73.849133][ T5849] ? ip6_mtu+0x81/0x3f0 [ 73.853269][ T5849] ip6_finish_output+0x41e/0x810 [ 73.858191][ T5849] NF_HOOK+0x9e/0x430 [ 73.862153][ T5849] ? icmp6_dst_alloc+0x3aa/0x420 [ 73.867092][ T5849] ? __pfx_NF_HOOK+0x10/0x10 [ 73.871681][ T5849] ? icmp6_dst_alloc+0x2bf/0x420 [ 73.876602][ T5849] ? icmp6_dst_alloc+0x3aa/0x420 [ 73.881521][ T5849] mld_sendpack+0x843/0xdb0 [ 73.886032][ T5849] ? __pfx_mld_newpack+0x10/0x10 [ 73.890984][ T5849] ? mld_sendpack+0x1e8/0xdb0 [ 73.895735][ T5849] ? __pfx_mld_sendpack+0x10/0x10 [ 73.900754][ T5849] mld_ifc_work+0x7d9/0xd90 [ 73.905235][ T5849] ? process_scheduled_works+0x976/0x1850 [ 73.910957][ T5849] process_scheduled_works+0xa63/0x1850 [ 73.916504][ T5849] ? __pfx_process_scheduled_works+0x10/0x10 [ 73.922479][ T5849] ? assign_work+0x364/0x3d0 [ 73.927073][ T5849] worker_thread+0x870/0xd30 [ 73.931665][ T5849] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 73.937551][ T5849] ? __kthread_parkme+0x169/0x1d0 [ 73.942565][ T5849] ? __pfx_worker_thread+0x10/0x10 [ 73.947676][ T5849] kthread+0x2f0/0x390 [ 73.951760][ T5849] ? __pfx_worker_thread+0x10/0x10 [ 73.956866][ T5849] ? __pfx_kthread+0x10/0x10 [ 73.961444][ T5849] ret_from_fork+0x4b/0x80 [ 73.965856][ T5849] ? __pfx_kthread+0x10/0x10 [ 73.970444][ T5849] ret_from_fork_asm+0x1a/0x30 [ 73.975195][ T5849] [pid 5841] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5841, si_uid=0, si_status=1, si_utime=0, si_stime=85 /* 0.85 s */} --- exit_group(0) = ? +++ exited with 0 +++