./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1682194552 <...> Warning: Permanently added '10.128.1.153' (ED25519) to the list of known hosts. execve("./syz-executor1682194552", ["./syz-executor1682194552"], 0x7fff28446030 /* 10 vars */) = 0 brk(NULL) = 0x5555805fc000 brk(0x5555805fcd00) = 0x5555805fcd00 arch_prctl(ARCH_SET_FS, 0x5555805fc380) = 0 set_tid_address(0x5555805fc650) = 5781 set_robust_list(0x5555805fc660, 24) = 0 rseq(0x5555805fcca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1682194552", 4096) = 28 getrandom("\xb5\x99\x2e\xcf\x80\xda\x71\x30", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555805fcd00 brk(0x55558061dd00) = 0x55558061dd00 brk(0x55558061e000) = 0x55558061e000 mprotect(0x7f1b61933000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555805fc650) = 5782 ./strace-static-x86_64: Process 5782 attached [pid 5782] set_robust_list(0x5555805fc660, 24) = 0 [pid 5782] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5782] setpgid(0, 0) = 0 [pid 5782] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5782] write(3, "1000", 4) = 4 [pid 5782] close(3executing program ) = 0 [pid 5782] write(1, "executing program\n", 18) = 18 [pid 5782] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 3 [pid 5782] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x2c\x00\x00\x00\x3d\x00\x07\x01\x00\x00\x00\x00\x00\x00\x00\x00\x04\x7c\x00\x00\x04\x00\x08\x80\x0c\x00\x01\x80\x06\x00\x06\x00\x80\x0a\x00\x00\x08\x00\x02\x80\x04\x00\x0b\x80", iov_len=44}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL|MSG_MORE) = 44 [pid 5782] exit_group(0) = ? [pid 5782] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5782, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5783 attached , child_tidptr=0x5555805fc650) = 5783 [pid 5783] set_robust_list(0x5555805fc660, 24) = 0 [pid 5783] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5783] setpgid(0, 0) = 0 [pid 5783] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5783] write(3, "1000", 4executing program ) = 4 [pid 5783] close(3) = 0 [pid 5783] write(1, "executing program\n", 18) = 18 [pid 5783] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 3 [ 204.277795][ T5782] openvswitch: netlink: Actions may not be safe on all matching packets [ 204.327107][ T5783] ===================================================== [ 204.334760][ T5783] BUG: KMSAN: uninit-value in validate_set+0x1a2/0x1640 [ 204.341930][ T5783] validate_set+0x1a2/0x1640 [ 204.352518][ T5783] __ovs_nla_copy_actions+0x2efc/0x61a0 [ 204.358970][ T5783] ovs_nla_copy_actions+0x36b/0x550 [ 204.364578][ T5783] get_flow_actions+0x99/0x1d0 [ 204.369609][ T5783] ovs_nla_init_match_and_action+0x221/0x420 [ 204.375979][ T5783] ovs_flow_cmd_set+0x320/0xec0 [ 204.381074][ T5783] genl_rcv_msg+0x1214/0x12c0 [ 204.386200][ T5783] netlink_rcv_skb+0x375/0x650 [ 204.391152][ T5783] genl_rcv+0x40/0x60 [ 204.395520][ T5783] netlink_unicast+0xf52/0x1260 [ 204.400566][ T5783] netlink_sendmsg+0x10da/0x11e0 [ 204.405766][ T5783] __sock_sendmsg+0x30f/0x380 [ 204.410662][ T5783] ____sys_sendmsg+0x890/0xda0 [ 204.415773][ T5783] ___sys_sendmsg+0x28d/0x3c0 [ 204.420694][ T5783] __x64_sys_sendmsg+0x212/0x3c0 [ 204.425965][ T5783] x64_sys_call+0x2e0f/0x3c80 [ 204.430873][ T5783] do_syscall_64+0xcd/0x1e0 [ 204.435730][ T5783] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 204.441824][ T5783] [ 204.444607][ T5783] Uninit was created at: [ 204.449071][ T5783] kmem_cache_alloc_node_noprof+0x921/0xe10 [ 204.455328][ T5783] kmalloc_reserve+0x13d/0x4a0 [ 204.460298][ T5783] __alloc_skb+0x366/0x7b0 [ 204.464962][ T5783] netlink_alloc_large_skb+0x1b4/0x280 [ 204.470623][ T5783] netlink_sendmsg+0xa96/0x11e0 [ 204.475865][ T5783] __sock_sendmsg+0x30f/0x380 [ 204.480782][ T5783] ____sys_sendmsg+0x890/0xda0 [ 204.485818][ T5783] ___sys_sendmsg+0x28d/0x3c0 [ 204.490704][ T5783] __x64_sys_sendmsg+0x212/0x3c0 [ 204.495990][ T5783] x64_sys_call+0x2e0f/0x3c80 [ 204.500910][ T5783] do_syscall_64+0xcd/0x1e0 [ 204.505793][ T5783] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 204.511896][ T5783] [ 204.514484][ T5783] CPU: 0 UID: 0 PID: 5783 Comm: syz-executor168 Not tainted 6.15.0-rc1-syzkaller #0 PREEMPT(undef) [ 204.525606][ T5783] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 204.535973][ T5783] ===================================================== [ 204.543225][ T5783] Disabling lock debugging due to kernel taint [ 204.549518][ T5783] Kernel panic - not syncing: kmsan.panic set ... [ 204.556103][ T5783] CPU: 0 UID: 0 PID: 5783 Comm: syz-executor168 Tainted: G B 6.15.0-rc1-syzkaller #0 PREEMPT(undef) [ 204.568660][ T5783] Tainted: [B]=BAD_PAGE [ 204.572995][ T5783] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 204.583238][ T5783] Call Trace: [ 204.586606][ T5783] [ 204.589617][ T5783] dump_stack_lvl+0x216/0x2d0 [ 204.594479][ T5783] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 204.600487][ T5783] dump_stack+0x1e/0x24 [ 204.604796][ T5783] panic+0x4e5/0xcf0 [ 204.608849][ T5783] ? kmsan_internal_set_shadow_origin+0x60/0x100 [ 204.615432][ T5783] kmsan_report+0x2ca/0x2d0 [ 204.620179][ T5783] ? __msan_warning+0x95/0x120 [ 204.625064][ T5783] ? validate_set+0x1a2/0x1640 [ 204.629955][ T5783] ? __ovs_nla_copy_actions+0x2efc/0x61a0 [ 204.635844][ T5783] ? ovs_nla_copy_actions+0x36b/0x550 [ 204.641362][ T5783] ? get_flow_actions+0x99/0x1d0 [ 204.646487][ T5783] ? ovs_nla_init_match_and_action+0x221/0x420 [ 204.652820][ T5783] ? ovs_flow_cmd_set+0x320/0xec0 [ 204.658078][ T5783] ? genl_rcv_msg+0x1214/0x12c0 [ 204.663112][ T5783] ? netlink_rcv_skb+0x375/0x650 [ 204.668207][ T5783] ? genl_rcv+0x40/0x60 [ 204.672510][ T5783] ? netlink_unicast+0xf52/0x1260 [ 204.677693][ T5783] ? netlink_sendmsg+0x10da/0x11e0 [ 204.682987][ T5783] ? __sock_sendmsg+0x30f/0x380 [ 204.688089][ T5783] ? ____sys_sendmsg+0x890/0xda0 [ 204.693277][ T5783] ? ___sys_sendmsg+0x28d/0x3c0 [ 204.698295][ T5783] ? __x64_sys_sendmsg+0x212/0x3c0 [ 204.703831][ T5783] ? x64_sys_call+0x2e0f/0x3c80 [ 204.708874][ T5783] ? do_syscall_64+0xcd/0x1e0 [ 204.713770][ T5783] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 204.720031][ T5783] ? kmsan_get_metadata+0x13e/0x1c0 [ 204.725404][ T5783] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 204.731383][ T5783] __msan_warning+0x95/0x120 [ 204.736120][ T5783] validate_set+0x1a2/0x1640 [ 204.740858][ T5783] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 204.746824][ T5783] ? kmsan_get_metadata+0x13e/0x1c0 [ 204.752196][ T5783] ? kmsan_get_metadata+0x13e/0x1c0 [ 204.757588][ T5783] ? kmsan_get_metadata+0x13e/0x1c0 [ 204.763023][ T5783] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 204.769050][ T5783] ? __rcu_read_unlock+0x7b/0xe0 [ 204.774200][ T5783] ? kmsan_get_metadata+0x13e/0x1c0 [ 204.779562][ T5783] ? kmsan_internal_set_shadow_origin+0x6c/0x100 [ 204.786058][ T5783] ? kmsan_internal_unpoison_memory+0x14/0x20 [ 204.792345][ T5783] ? _raw_spin_unlock_irqrestore+0x3f/0x60 [ 204.798364][ T5783] ? stack_depot_save_flags+0x6d5/0x7e0 [ 204.804115][ T5783] ? kmsan_get_metadata+0x13e/0x1c0 [ 204.809552][ T5783] ? kmsan_internal_set_shadow_origin+0x6c/0x100 [ 204.816081][ T5783] __ovs_nla_copy_actions+0x2efc/0x61a0 [ 204.821937][ T5783] ? kmsan_internal_unpoison_memory+0x14/0x20 [ 204.828242][ T5783] ? _raw_spin_unlock_irqrestore+0x3f/0x60 [ 204.834263][ T5783] ? stack_depot_save_flags+0x6d5/0x7e0 [ 204.839979][ T5783] ? kmsan_get_metadata+0x13e/0x1c0 [ 204.845394][ T5783] ? kmsan_get_metadata+0x13e/0x1c0 [ 204.850756][ T5783] ? kmsan_internal_set_shadow_origin+0x6c/0x100 [ 204.857261][ T5783] ? kmsan_get_metadata+0x13e/0x1c0 [ 204.862607][ T5783] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 204.868584][ T5783] ? __kmalloc_noprof+0x9b1/0x1260 [ 204.873828][ T5783] ? ovs_nla_copy_actions+0xa0/0x550 [ 204.879260][ T5783] ? kmsan_get_metadata+0x13e/0x1c0 [ 204.884630][ T5783] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 204.890610][ T5783] ovs_nla_copy_actions+0x36b/0x550 [ 204.896011][ T5783] get_flow_actions+0x99/0x1d0 [ 204.901020][ T5783] ovs_nla_init_match_and_action+0x221/0x420 [ 204.907283][ T5783] ovs_flow_cmd_set+0x320/0xec0 [ 204.912459][ T5783] ? kmsan_report+0x270/0x2d0 [ 204.917300][ T5783] ? __pfx_ovs_flow_cmd_set+0x10/0x10 [ 204.922868][ T5783] genl_rcv_msg+0x1214/0x12c0 [ 204.927811][ T5783] ? __pfx_ovs_flow_cmd_set+0x10/0x10 [ 204.933392][ T5783] netlink_rcv_skb+0x375/0x650 [ 204.938329][ T5783] ? __pfx_genl_rcv_msg+0x10/0x10 [ 204.943526][ T5783] ? __pfx_genl_rcv+0x10/0x10 [ 204.948356][ T5783] genl_rcv+0x40/0x60 [ 204.952506][ T5783] netlink_unicast+0xf52/0x1260 [ 204.957530][ T5783] netlink_sendmsg+0x10da/0x11e0 [ 204.962645][ T5783] ? __pfx_netlink_sendmsg+0x10/0x10 [ 204.968085][ T5783] ? __pfx_netlink_sendmsg+0x10/0x10 [ 204.973529][ T5783] __sock_sendmsg+0x30f/0x380 [ 204.978381][ T5783] ____sys_sendmsg+0x890/0xda0 [ 204.983356][ T5783] ___sys_sendmsg+0x28d/0x3c0 [ 204.988256][ T5783] ? stack_depot_save_flags+0x37/0x7e0 [ 204.993885][ T5783] ? kmsan_get_metadata+0x13e/0x1c0 [ 204.999312][ T5783] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 205.005277][ T5783] ? kmsan_get_metadata+0x13e/0x1c0 [ 205.010619][ T5783] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 205.016595][ T5783] __x64_sys_sendmsg+0x212/0x3c0 [ 205.021721][ T5783] ? kmsan_get_metadata+0x13e/0x1c0 [ 205.027110][ T5783] x64_sys_call+0x2e0f/0x3c80 [ 205.031961][ T5783] do_syscall_64+0xcd/0x1e0 [ 205.036619][ T5783] ? clear_bhb_loop+0x25/0x80 [ 205.041468][ T5783] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 205.047580][ T5783] RIP: 0033:0x7f1b618c0b79 [ 205.052106][ T5783] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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 [ 205.071882][ T5783] RSP: 002b:00007ffcc180d418 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 205.080466][ T5783] RAX: ffffffffffffffda RBX: 00002000000007c0 RCX: 00007f1b618c0b79 [ 205.088586][ T5783] RDX: 000000000000c000 RSI: 0000200000000000 RDI: 0000000000000003 [ 205.096713][ T5783] RBP: 0000000000031dd6 R08: 0000000000000006 R09: 0000000000000006 [ 205.104787][ T5783] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcc180d42c [ 205.112896][ T5783] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 205.121076][ T5783] [ 205.124609][ T5783] Kernel Offset: disabled [ 205.129052][ T5783] Rebooting in 86400 seconds..