Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 1 UID: 0 PID: 7626 Comm: syz.5.500 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:rds_tcp_tc_info+0x1a3/0x580 net/rds/tcp.c:248
Code: bc 24 98 fe ff ff 4c 89 f8 48 c1 e8 03 42 80 3c 30 00 74 08 4c 89 ff e8 7b 75 c0 f7 4d 8b 3f 49 83 c7 18 4c 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 08 4c 89 ff e8 5e 75 c0 f7 4d 8b 3f 49 8d bf 98
RSP: 0018:ffffc9000450fb80 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffff88803e5a19d8 RCX: 0000000000080000
RDX: ffffc9001da9e000 RSI: 0000000000001b5d RDI: 0000000000001b5e
RBP: ffffc9000450fc70 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1ed4bb7 R12: ffff88803e5a1bc8
R13: 1ffff11007cb433b R14: dffffc0000000000 R15: 0000000000000018
FS: 00007f80baac96c0(0000) GS:ffff888126439000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3371dff8 CR3: 000000003dd3e000 CR4: 00000000003526f0
Call Trace:
<TASK>
rds_info_getsockopt+0x2e9/0x400 net/rds/info.c:218
do_sock_getsockopt+0x2d3/0x3f0 net/socket.c:2383
__sys_getsockopt net/socket.c:2412 [inline]
__do_sys_getsockopt net/socket.c:2419 [inline]
__se_sys_getsockopt net/socket.c:2416 [inline]
__x64_sys_getsockopt+0x1aa/0x250 net/socket.c:2416
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: 0033:0x7f80bccdc799
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:00007f80baac9028 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007f80bcf56270 RCX: 00007f80bccdc799
RDX: 0000000000002717 RSI: 0000200000000114 RDI: 0000000000000007
RBP: 00007f80bcd72c99 R08: 0000200000000000 R09: 0000000000000000
R10: 0000200000019580 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f80bcf56308 R14: 00007f80bcf56270 R15: 00007ffd514f1918
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:rds_tcp_tc_info+0x1a3/0x580 net/rds/tcp.c:248
Code: bc 24 98 fe ff ff 4c 89 f8 48 c1 e8 03 42 80 3c 30 00 74 08 4c 89 ff e8 7b 75 c0 f7 4d 8b 3f 49 83 c7 18 4c 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 08 4c 89 ff e8 5e 75 c0 f7 4d 8b 3f 49 8d bf 98
RSP: 0018:ffffc9000450fb80 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffff88803e5a19d8 RCX: 0000000000080000
RDX: ffffc9001da9e000 RSI: 0000000000001b5d RDI: 0000000000001b5e
RBP: ffffc9000450fc70 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1ed4bb7 R12: ffff88803e5a1bc8
R13: 1ffff11007cb433b R14: dffffc0000000000 R15: 0000000000000018
FS: 00007f80baac96c0(0000) GS:ffff888126439000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3371dff8 CR3: 000000003dd3e000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: bc 24 98 fe ff mov $0xfffe9824,%esp
5: ff 4c 89 f8 decl -0x8(%rcx,%rcx,4)
9: 48 c1 e8 03 shr $0x3,%rax
d: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
12: 74 08 je 0x1c
14: 4c 89 ff mov %r15,%rdi
17: e8 7b 75 c0 f7 call 0xf7c07597
1c: 4d 8b 3f mov (%r15),%r15
1f: 49 83 c7 18 add $0x18,%r15
23: 4c 89 f8 mov %r15,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 ff mov %r15,%rdi
34: e8 5e 75 c0 f7 call 0xf7c07597
39: 4d 8b 3f mov (%r15),%r15
3c: 49 rex.WB
3d: 8d .byte 0x8d
3e: bf .byte 0xbf
3f: 98 cwtl