TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. ============================= openvswitch: netlink: Flow get message rejected, Key attribute missing. WARNING: suspicious RCU usage 4.18.0+ #196 Not tainted ----------------------------- kernel/bpf/core.c:1582 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by syz-executor5/31979: #0: 000000007be3fbbd (&ctx->mutex){+.+.}, at: perf_event_ctx_lock_nested+0x375/0x600 kernel/events/core.c:1276 #1: 0000000017c7bd18 (bpf_event_mutex){+.+.}, at: perf_event_query_prog_array+0x1c6/0x380 kernel/trace/bpf_trace.c:1062 stack backtrace: CPU: 0 PID: 31979 Comm: syz-executor5 Not tainted 4.18.0+ #196 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 lockdep_rcu_suspicious+0x14a/0x153 kernel/locking/lockdep.c:4562 bpf_prog_array_copy_core+0x2d9/0x360 kernel/bpf/core.c:1582 bpf_prog_array_copy_info+0x9a/0x110 kernel/bpf/core.c:1720 perf_event_query_prog_array+0x22e/0x380 kernel/trace/bpf_trace.c:1063 _perf_ioctl+0x986/0x1600 kernel/events/core.c:5079 perf_ioctl+0x59/0x80 kernel/events/core.c:5110 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684 MINIX-fs: mounting unchecked file system, running fsck is recommended ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f0708222c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f07082236d4 RCX: 0000000000457089 RDX: 0000000020000180 RSI: 00000000c008240a RDI: 0000000000000005 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cf3a8 R14: 00000000004bead0 R15: 0000000000000000 minix_free_inode: bit 1 already cleared MINIX-fs: mounting unchecked file system, running fsck is recommended minix_free_inode: bit 1 already cleared MINIX-fs: mounting unchecked file system, running fsck is recommended minix_free_inode: bit 1 already cleared MINIX-fs: mounting unchecked file system, running fsck is recommended IPVS: sync thread started: state = BACKUP, mcast_ifn = veth1_to_team, syncid = 0, id = 0 IPVS: stopping backup sync thread 32146 ... minix_free_inode: bit 1 already cleared MINIX-fs: mounting unchecked file system, running fsck is recommended minix_free_inode: bit 1 already cleared MINIX-fs: mounting unchecked file system, running fsck is recommended ion_mmap: failure mapping buffer to userspace ion_mmap: failure mapping buffer to userspace minix_free_inode: bit 1 already cleared MINIX-fs: mounting unchecked file system, running fsck is recommended minix_free_inode: bit 1 already cleared syz-executor0 (32185) used greatest stack depth: 11848 bytes left hfsplus: session requires an argument hfsplus: unable to parse mount options MINIX-fs: mounting unchecked file system, running fsck is recommended hfsplus: session requires an argument hfsplus: unable to parse mount options nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. minix_free_inode: bit 1 already cleared MINIX-fs: mounting unchecked file system, running fsck is recommended minix_free_inode: bit 1 already cleared *** Guest State *** CR0: actual=0x0000000000000020, shadow=0x0000000000000000, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002040, shadow=0x0000000000000000, gh_mask=ffffffffffffe871 CR3 = 0x0000000000000000 RSP = 0x0000000000000f80 RIP = 0x0000000000008000 RFLAGS=0x00010002 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000f80 CS:RIP=0030:0000000000002810 CS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 DS: sel=0x0000, attr=0x00087, limit=0x00000000, base=0x0000000000000000 SS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 ES: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 FS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 GS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 GDTR: limit=0x00000000, base=0x0000000000000000 LDTR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 IDTR: limit=0x00000000, base=0x0000000000000000 TR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 EFER = 0x0000000000000000 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 Interruptibility = 00000008 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff812079c4 RSP = 0xffff88018ad1f350 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007f58dace0700 GSBase=ffff8801db100000 TRBase=fffffe0000034000 GDTBase=fffffe0000032000 IDTBase=fffffe0000000000 CR0=0000000080050033 CR3=00000001af98d000 CR4=00000000001426e0 Sysenter RSP=fffffe0000033200 CS:RIP=0010:ffffffff86c01380 EFER = 0x0000000000000d01 PAT = 0x0000000000000000 *** Control State *** PinBased=0000003f CPUBased=b5986dfa SecondaryExec=000000ca EntryControls=0000d1ff ExitControls=0023efff ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 VMEntry: intr_info=8000030d errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000002 MINIX-fs: mounting unchecked file system, running fsck is recommended reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffff065e196af7 EPT pointer = 0x00000001ceb7101e *** Guest State *** CR0: actual=0x0000000000000020, shadow=0x0000000000000000, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002040, shadow=0x0000000000000000, gh_mask=ffffffffffffe871 CR3 = 0x0000000000000000 RSP = 0x0000000000000f80 RIP = 0x0000000000000000 RFLAGS=0x00000002 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000f80 CS:RIP=0030:0000000000002810 CS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 DS: sel=0x0000, attr=0x00087, limit=0x00000000, base=0x0000000000000000 SS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 ES: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 FS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 GS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 GDTR: limit=0x00000000, base=0x0000000000000000 LDTR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 IDTR: limit=0x00000000, base=0x0000000000000000 TR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 EFER = 0x0000000000000000 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 Interruptibility = 00000008 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff812079c4 RSP = 0xffff88018ad1f350 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007f58dace0700 GSBase=ffff8801db000000 TRBase=fffffe0000003000 GDTBase=fffffe0000001000 IDTBase=fffffe0000000000 CR0=0000000080050033 CR3=00000001af98d000 CR4=00000000001426f0 Sysenter RSP=fffffe0000002200 CS:RIP=0010:ffffffff86c01380 EFER = 0x0000000000000d01 PAT = 0x0000000000000000 *** Control State *** PinBased=0000003f CPUBased=b5986dfa SecondaryExec=000000ca EntryControls=0000d1ff ExitControls=0023efff ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 VMEntry: intr_info=8000030d errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffff065e196af7 EPT pointer = 0x00000001ceb7101e minix_free_inode: bit 1 already cleared