openvswitch: netlink: Flow actions may not be safe on all matching packets. Oops: general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f] CPU: 1 UID: 0 PID: 20947 Comm: syz.2.3797 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:rt_cache_valid net/ipv4/route.c:1582 [inline] RIP: 0010:__mkroute_output net/ipv4/route.c:2650 [inline] RIP: 0010:ip_route_output_key_hash_rcu+0x12ba/0x25d0 net/ipv4/route.c:2875 Code: c3 31 ff 89 c6 e8 b6 9b c7 f7 85 db 74 5b e8 6d 97 c7 f7 eb 05 e8 66 97 c7 f7 4d 85 ff 74 36 49 8d 5f 3a 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 ff 10 00 00 0f b7 1b bf ff ff 00 00 89 RSP: 0018:ffffc9001398f140 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 0000000000000039 RCX: 0000000000080000 RDX: ffffc9000d88e000 RSI: 000000000000223b RDI: 000000000000223c RBP: 0000000080000000 R08: ffff888075b73c80 R09: 0000000000000003 R10: 0000000000000005 R11: 0000000000000002 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff888053076158 R15: ffffffffffffffff FS: 00007f0f56b7e6c0(0000) GS:ffff8881255b0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000002000 CR3: 000000007df12000 CR4: 00000000003526f0 Call Trace: ip_route_output_key_hash+0x18d/0x2a0 net/ipv4/route.c:2705 __ip_route_output_key include/net/route.h:169 [inline] ip_route_output_flow+0x2a/0x150 net/ipv4/route.c:2932 ip_route_output_key include/net/route.h:179 [inline] sctp_v4_get_dst+0x3f8/0x12b0 net/sctp/protocol.c:455 sctp_transport_route+0x118/0x2f0 net/sctp/transport.c:448 sctp_assoc_add_peer+0x650/0x13b0 net/sctp/associola.c:663 sctp_connect_new_asoc+0x329/0x6b0 net/sctp/socket.c:1100 sctp_sendmsg_new_asoc net/sctp/socket.c:1692 [inline] sctp_sendmsg+0x1528/0x2c10 net/sctp/socket.c:2003 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0x894/0xad0 net/socket.c:2592 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2646 __sys_sendmmsg+0x27c/0x4e0 net/socket.c:2735 __do_sys_sendmmsg net/socket.c:2762 [inline] __se_sys_sendmmsg net/socket.c:2759 [inline] __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2759 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0f55d9c629 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0f56b7e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f0f56015fa0 RCX: 00007f0f55d9c629 RDX: 0000000000000002 RSI: 0000200000000940 RDI: 0000000000000007 RBP: 00007f0f55e32b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0f56016038 R14: 00007f0f56015fa0 R15: 00007ffe0a57a238 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:rt_cache_valid net/ipv4/route.c:1582 [inline] RIP: 0010:__mkroute_output net/ipv4/route.c:2650 [inline] RIP: 0010:ip_route_output_key_hash_rcu+0x12ba/0x25d0 net/ipv4/route.c:2875 Code: c3 31 ff 89 c6 e8 b6 9b c7 f7 85 db 74 5b e8 6d 97 c7 f7 eb 05 e8 66 97 c7 f7 4d 85 ff 74 36 49 8d 5f 3a 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 ff 10 00 00 0f b7 1b bf ff ff 00 00 89 RSP: 0018:ffffc9001398f140 EFLAGS: 00010202 RAX: 0000000000000007 RBX: 0000000000000039 RCX: 0000000000080000 RDX: ffffc9000d88e000 RSI: 000000000000223b RDI: 000000000000223c RBP: 0000000080000000 R08: ffff888075b73c80 R09: 0000000000000003 R10: 0000000000000005 R11: 0000000000000002 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff888053076158 R15: ffffffffffffffff FS: 00007f0f56b7e6c0(0000) GS:ffff8881255b0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faec80e7e9c CR3: 000000007df12000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: c3 ret 1: 31 ff xor %edi,%edi 3: 89 c6 mov %eax,%esi 5: e8 b6 9b c7 f7 call 0xf7c79bc0 a: 85 db test %ebx,%ebx c: 74 5b je 0x69 e: e8 6d 97 c7 f7 call 0xf7c79780 13: eb 05 jmp 0x1a 15: e8 66 97 c7 f7 call 0xf7c79780 1a: 4d 85 ff test %r15,%r15 1d: 74 36 je 0x55 1f: 49 8d 5f 3a lea 0x3a(%r15),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 ff 10 00 00 jne 0x1136 37: 0f b7 1b movzwl (%rbx),%ebx 3a: bf ff ff 00 00 mov $0xffff,%edi 3f: 89 .byte 0x89