Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 0 UID: 0 PID: 5231 Comm: syz-executor425 Not tainted 6.11.0-rc6-syzkaller-01235-ga9b1fab3b69f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:ethnl_phy_doit+0x2f0/0x870 net/ethtool/phy.c:167
Code: 00 00 fc ff df 80 3c 08 00 74 05 e8 5a 91 2b f8 48 8b 5c 24 78 48 83 c3 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 32 91 2b f8 4c 8b 2b 4d 85 ed 74 25
RSP: 0018:ffffc90002de7360 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90002de73d8
RBP: ffffc90002de7470 R08: ffffffff89cb85e4 R09: 1ffffffff1f9194c
R10: dffffc0000000000 R11: fffffbfff1f9194d R12: 0000000000000000
R13: 1ffff11004fce1bd R14: ffffc90002de7740 R15: ffffc90002de73c0
FS: 000055557b87c380(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000355e7018 CR3: 0000000024632000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
___sys_sendmsg net/socket.c:2651 [inline]
__sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8a140b5219
Code: 48 83 c4 28 c3 e8 e7 18 00 00 0f 1f 80 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc043fab58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ffc043fad28 RCX: 00007f8a140b5219
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000003
RBP: 00007f8a14127610 R08: 0000000000000000 R09: 00007ffc043fad28
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc043fad18 R14: 0000000000000001 R15: 0000000000000001
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ethnl_phy_doit+0x2f0/0x870 net/ethtool/phy.c:167
Code: 00 00 fc ff df 80 3c 08 00 74 05 e8 5a 91 2b f8 48 8b 5c 24 78 48 83 c3 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 32 91 2b f8 4c 8b 2b 4d 85 ed 74 25
RSP: 0018:ffffc90002de7360 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90002de73d8
RBP: ffffc90002de7470 R08: ffffffff89cb85e4 R09: 1ffffffff1f9194c
R10: dffffc0000000000 R11: fffffbfff1f9194d R12: 0000000000000000
R13: 1ffff11004fce1bd R14: ffffc90002de7740 R15: ffffc90002de73c0
FS: 000055557b87c380(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000355e7018 CR3: 0000000024632000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 4 bytes skipped:
0: df 80 3c 08 00 74 filds 0x7400083c(%rax)
6: 05 e8 5a 91 2b add $0x2b915ae8,%eax
b: f8 clc
c: 48 8b 5c 24 78 mov 0x78(%rsp),%rbx
11: 48 83 c3 18 add $0x18,%rbx
15: 48 89 d8 mov %rbx,%rax
18: 48 c1 e8 03 shr $0x3,%rax
1c: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
23: fc ff df
* 26: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction
2a: 74 08 je 0x34
2c: 48 89 df mov %rbx,%rdi
2f: e8 32 91 2b f8 call 0xf82b9166
34: 4c 8b 2b mov (%rbx),%r13
37: 4d 85 ed test %r13,%r13
3a: 74 25 je 0x61