./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3650847497 <...> Warning: Permanently added '10.128.10.20' (ED25519) to the list of known hosts. execve("./syz-executor3650847497", ["./syz-executor3650847497"], 0x7ffcc4b08770 /* 10 vars */) = 0 brk(NULL) = 0x555573a73000 brk(0x555573a73d00) = 0x555573a73d00 arch_prctl(ARCH_SET_FS, 0x555573a73380) = 0 set_tid_address(0x555573a73650) = 5786 set_robust_list(0x555573a73660, 24) = 0 rseq(0x555573a73ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3650847497", 4096) = 28 getrandom("\x7d\xd6\x45\xc8\xdd\xad\x7e\xef", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555573a73d00 brk(0x555573a94d00) = 0x555573a94d00 brk(0x555573a95000) = 0x555573a95000 mprotect(0x7fb87964a000, 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=0x555573a73650) = 5787 ./strace-static-x86_64: Process 5787 attached [pid 5787] set_robust_list(0x555573a73660, 24) = 0 [pid 5787] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5787] setpgid(0, 0) = 0 [pid 5787] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5787] write(3, "1000", 4) = 4 [pid 5787] close(3executing program ) = 0 [pid 5787] write(1, "executing program\n", 18) = 18 [pid 5787] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 3 [ 209.651705][ T5787] ===================================================== [ 209.662898][ T5787] BUG: KMSAN: uninit-value in validate_set+0x1a2/0x1640 [ 209.670062][ T5787] validate_set+0x1a2/0x1640 [ 209.675055][ T5787] __ovs_nla_copy_actions+0x2efc/0x61a0 [ 209.680823][ T5787] ovs_nla_copy_actions+0x36b/0x550 [ 209.688137][ T5787] get_flow_actions+0x99/0x1d0 [ 209.693397][ T5787] ovs_nla_init_match_and_action+0x221/0x420 [ 209.699662][ T5787] ovs_flow_cmd_set+0x320/0xec0 [ 209.705031][ T5787] genl_rcv_msg+0x1214/0x12c0 [ 209.709967][ T5787] netlink_rcv_skb+0x375/0x650 [ 209.715217][ T5787] genl_rcv+0x40/0x60 [ 209.719822][ T5787] netlink_unicast+0xf52/0x1260 [ 209.725072][ T5787] netlink_sendmsg+0x10da/0x11e0 [ 209.730232][ T5787] __sock_sendmsg+0x30f/0x380 [ 209.735281][ T5787] ____sys_sendmsg+0x890/0xda0 [ 209.740288][ T5787] ___sys_sendmsg+0x28d/0x3c0 [ 209.745269][ T5787] __x64_sys_sendmsg+0x212/0x3c0 [ 209.750437][ T5787] x64_sys_call+0x2e0f/0x3c80 [ 209.755617][ T5787] do_syscall_64+0xcd/0x1e0 [ 209.760342][ T5787] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 209.766689][ T5787] [ 209.769136][ T5787] Uninit was created at: [ 209.773866][ T5787] kmem_cache_alloc_node_noprof+0x921/0xe10 [ 209.779989][ T5787] kmalloc_reserve+0x13d/0x4a0 [ 209.785105][ T5787] __alloc_skb+0x366/0x7b0 [ 209.789755][ T5787] netlink_alloc_large_skb+0x1b4/0x280 [ 209.795656][ T5787] netlink_sendmsg+0xa96/0x11e0 [ 209.800818][ T5787] __sock_sendmsg+0x30f/0x380 [ 209.805867][ T5787] ____sys_sendmsg+0x890/0xda0 [ 209.810901][ T5787] ___sys_sendmsg+0x28d/0x3c0 [ 209.816009][ T5787] __x64_sys_sendmsg+0x212/0x3c0 [ 209.821432][ T5787] x64_sys_call+0x2e0f/0x3c80 [ 209.826598][ T5787] do_syscall_64+0xcd/0x1e0 [ 209.831344][ T5787] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 209.837570][ T5787] [ 209.840043][ T5787] CPU: 1 UID: 0 PID: 5787 Comm: syz-executor365 Not tainted 6.15.0-rc1-syzkaller #0 PREEMPT(undef) [ 209.851132][ T5787] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 209.861552][ T5787] ===================================================== [ 209.868785][ T5787] Disabling lock debugging due to kernel taint [ 209.875211][ T5787] Kernel panic - not syncing: kmsan.panic set ... [ 209.881761][ T5787] CPU: 1 UID: 0 PID: 5787 Comm: syz-executor365 Tainted: G B 6.15.0-rc1-syzkaller #0 PREEMPT(undef) [ 209.894326][ T5787] Tainted: [B]=BAD_PAGE [ 209.898605][ T5787] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 209.908857][ T5787] Call Trace: [ 209.912280][ T5787] [ 209.915301][ T5787] dump_stack_lvl+0x216/0x2d0 [ 209.920175][ T5787] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 209.926253][ T5787] dump_stack+0x1e/0x24 [ 209.930566][ T5787] panic+0x4e5/0xcf0 [ 209.934633][ T5787] ? kmsan_internal_set_shadow_origin+0x60/0x100 [ 209.941167][ T5787] kmsan_report+0x2ca/0x2d0 [ 209.945890][ T5787] ? __msan_warning+0x95/0x120 [ 209.950820][ T5787] ? validate_set+0x1a2/0x1640 [ 209.955812][ T5787] ? __ovs_nla_copy_actions+0x2efc/0x61a0 [ 209.961747][ T5787] ? ovs_nla_copy_actions+0x36b/0x550 [ 209.967327][ T5787] ? get_flow_actions+0x99/0x1d0 [ 209.972455][ T5787] ? ovs_nla_init_match_and_action+0x221/0x420 [ 209.978802][ T5787] ? ovs_flow_cmd_set+0x320/0xec0 [ 209.984005][ T5787] ? genl_rcv_msg+0x1214/0x12c0 [ 209.989035][ T5787] ? netlink_rcv_skb+0x375/0x650 [ 209.994124][ T5787] ? genl_rcv+0x40/0x60 [ 209.998440][ T5787] ? netlink_unicast+0xf52/0x1260 [ 210.003602][ T5787] ? netlink_sendmsg+0x10da/0x11e0 [ 210.008888][ T5787] ? __sock_sendmsg+0x30f/0x380 [ 210.013950][ T5787] ? ____sys_sendmsg+0x890/0xda0 [ 210.019066][ T5787] ? ___sys_sendmsg+0x28d/0x3c0 [ 210.024088][ T5787] ? __x64_sys_sendmsg+0x212/0x3c0 [ 210.029405][ T5787] ? x64_sys_call+0x2e0f/0x3c80 [ 210.034534][ T5787] ? do_syscall_64+0xcd/0x1e0 [ 210.039369][ T5787] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 210.045662][ T5787] ? kmsan_get_metadata+0x13e/0x1c0 [ 210.051085][ T5787] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 210.057101][ T5787] __msan_warning+0x95/0x120 [ 210.061881][ T5787] validate_set+0x1a2/0x1640 [ 210.066647][ T5787] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 210.072647][ T5787] ? kmsan_get_metadata+0x13e/0x1c0 [ 210.078073][ T5787] ? kmsan_get_metadata+0x13e/0x1c0 [ 210.083447][ T5787] ? kmsan_get_metadata+0x13e/0x1c0 [ 210.088843][ T5787] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 210.094938][ T5787] ? __rcu_read_unlock+0x7b/0xe0 [ 210.100086][ T5787] ? kmsan_get_metadata+0x13e/0x1c0 [ 210.105569][ T5787] ? kmsan_internal_set_shadow_origin+0x6c/0x100 [ 210.112111][ T5787] ? kmsan_internal_unpoison_memory+0x14/0x20 [ 210.118425][ T5787] ? _raw_spin_unlock_irqrestore+0x3f/0x60 [ 210.124454][ T5787] ? stack_depot_save_flags+0x6d5/0x7e0 [ 210.130277][ T5787] ? kmsan_get_metadata+0x13e/0x1c0 [ 210.135665][ T5787] ? kmsan_internal_set_shadow_origin+0x6c/0x100 [ 210.142231][ T5787] __ovs_nla_copy_actions+0x2efc/0x61a0 [ 210.148053][ T5787] ? kmsan_internal_unpoison_memory+0x14/0x20 [ 210.154356][ T5787] ? _raw_spin_unlock_irqrestore+0x3f/0x60 [ 210.160370][ T5787] ? stack_depot_save_flags+0x6d5/0x7e0 [ 210.166159][ T5787] ? kmsan_get_metadata+0x13e/0x1c0 [ 210.171528][ T5787] ? kmsan_get_metadata+0x13e/0x1c0 [ 210.176897][ T5787] ? kmsan_internal_set_shadow_origin+0x6c/0x100 [ 210.183398][ T5787] ? kmsan_get_metadata+0x13e/0x1c0 [ 210.188769][ T5787] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 210.194788][ T5787] ? __kmalloc_noprof+0x9b1/0x1260 [ 210.200081][ T5787] ? ovs_nla_copy_actions+0xa0/0x550 [ 210.205526][ T5787] ? kmsan_get_metadata+0x13e/0x1c0 [ 210.210895][ T5787] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 210.216920][ T5787] ovs_nla_copy_actions+0x36b/0x550 [ 210.222337][ T5787] get_flow_actions+0x99/0x1d0 [ 210.227385][ T5787] ovs_nla_init_match_and_action+0x221/0x420 [ 210.233719][ T5787] ovs_flow_cmd_set+0x320/0xec0 [ 210.238949][ T5787] ? kmsan_report+0x270/0x2d0 [ 210.243832][ T5787] ? __pfx_ovs_flow_cmd_set+0x10/0x10 [ 210.249409][ T5787] genl_rcv_msg+0x1214/0x12c0 [ 210.254289][ T5787] ? __pfx_ovs_flow_cmd_set+0x10/0x10 [ 210.259897][ T5787] netlink_rcv_skb+0x375/0x650 [ 210.264862][ T5787] ? __pfx_genl_rcv_msg+0x10/0x10 [ 210.270100][ T5787] ? __pfx_genl_rcv+0x10/0x10 [ 210.274956][ T5787] genl_rcv+0x40/0x60 [ 210.279134][ T5787] netlink_unicast+0xf52/0x1260 [ 210.284165][ T5787] netlink_sendmsg+0x10da/0x11e0 [ 210.289287][ T5787] ? __pfx_netlink_sendmsg+0x10/0x10 [ 210.294738][ T5787] ? __pfx_netlink_sendmsg+0x10/0x10 [ 210.300181][ T5787] __sock_sendmsg+0x30f/0x380 [ 210.305087][ T5787] ____sys_sendmsg+0x890/0xda0 [ 210.310118][ T5787] ___sys_sendmsg+0x28d/0x3c0 [ 210.315000][ T5787] ? stack_depot_save_flags+0x37/0x7e0 [ 210.321070][ T5787] ? kmsan_get_metadata+0x13e/0x1c0 [ 210.326447][ T5787] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 210.332442][ T5787] ? kmsan_get_metadata+0x13e/0x1c0 [ 210.337863][ T5787] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 210.343891][ T5787] __x64_sys_sendmsg+0x212/0x3c0 [ 210.349027][ T5787] ? kmsan_get_metadata+0x13e/0x1c0 [ 210.354419][ T5787] x64_sys_call+0x2e0f/0x3c80 [ 210.359276][ T5787] do_syscall_64+0xcd/0x1e0 [ 210.363963][ T5787] ? clear_bhb_loop+0x25/0x80 [ 210.368859][ T5787] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 210.374939][ T5787] RIP: 0033:0x7fb8795d7b79 [ 210.379491][ T5787] 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 [ 210.399279][ T5787] RSP: 002b:00007ffddb9181f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 210.407899][ T5787] RAX: ffffffffffffffda RBX: 00002000000007c0 RCX: 00007fb8795d7b79 [ 210.416069][ T5787] RDX: 000000000000c000 RSI: 0000200000000000 RDI: 0000000000000003 [ 210.424199][ T5787] RBP: 00007fb87964a5f0 R08: 0000000000000006 R09: 0000000000000006 [ 210.432349][ T5787] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 210.440443][ T5787] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 210.448614][ T5787] [ 210.452218][ T5787] Kernel Offset: disabled [ 210.456674][ T5787] Rebooting in 86400 seconds..