BUG: unable to handle page fault for address: ffffed101194b000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 5ffd5067 P4D 5ffd5067 PUD 2fffa067 PMD 0 Oops: Oops: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 1072 Comm: kworker/u4:8 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: krds_cp_wq#0/0 rds_connect_worker RIP: 0010:__mkroute_output net/ipv4/route.c:2649 [inline] RIP: 0010:ip_route_output_key_hash_rcu+0x1264/0x25d0 net/ipv4/route.c:2875 Code: 5a 11 09 49 83 c6 38 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 d9 3c 26 f8 49 03 1e 4d 89 fd 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 bd 3c 26 f8 4c 8b 3b e8 d5 51 a4 RSP: 0018:ffffc900055e7320 EFLAGS: 00010a06 RAX: 1ffff1101194b000 RBX: ffff88808ca58000 RCX: ffff888032f18000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000080000000 R08: ffff888032f18000 R09: 0000000000000003 R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff888038517558 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88808ca58000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed101194b000 CR3: 0000000041bb2000 CR4: 0000000000352ef0 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_connect include/net/route.h:355 [inline] tcp_v4_connect+0x81e/0x1a90 net/ipv4/tcp_ipv4.c:256 __inet_stream_connect+0x26b/0xea0 net/ipv4/af_inet.c:679 inet_stream_connect+0x66/0xa0 net/ipv4/af_inet.c:750 kernel_connect+0x141/0x1c0 net/socket.c:3634 rds_tcp_conn_path_connect+0x6f6/0x930 net/rds/tcp_connect.c:205 rds_connect_worker+0x1d8/0x290 net/rds/threads.c:176 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: CR2: ffffed101194b000 ---[ end trace 0000000000000000 ]--- RIP: 0010:__mkroute_output net/ipv4/route.c:2649 [inline] RIP: 0010:ip_route_output_key_hash_rcu+0x1264/0x25d0 net/ipv4/route.c:2875 Code: 5a 11 09 49 83 c6 38 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 d9 3c 26 f8 49 03 1e 4d 89 fd 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 bd 3c 26 f8 4c 8b 3b e8 d5 51 a4 RSP: 0018:ffffc900055e7320 EFLAGS: 00010a06 RAX: 1ffff1101194b000 RBX: ffff88808ca58000 RCX: ffff888032f18000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000080000000 R08: ffff888032f18000 R09: 0000000000000003 R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff888038517558 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88808ca58000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed101194b000 CR3: 0000000041bb2000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 5a pop %rdx 1: 11 09 adc %ecx,(%rcx) 3: 49 83 c6 38 add $0x38,%r14 7: 4c 89 f0 mov %r14,%rax a: 48 c1 e8 03 shr $0x3,%rax e: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 13: 74 08 je 0x1d 15: 4c 89 f7 mov %r14,%rdi 18: e8 d9 3c 26 f8 call 0xf8263cf6 1d: 49 03 1e add (%r14),%rbx 20: 4d 89 fd mov %r15,%r13 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 bd 3c 26 f8 call 0xf8263cf6 39: 4c 8b 3b mov (%rbx),%r15 3c: e8 .byte 0xe8 3d: d5 51 a4 (bad)