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: 10700 Comm: syz.1.995 Not tainted 6.13.0-rc5-syzkaller-00012-g0bc21e701a6f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:rtnl_fill_alt_ifnames net/core/rtnetlink.c:1893 [inline] RIP: 0010:rtnl_fill_prop_list net/core/rtnetlink.c:1911 [inline] RIP: 0010:rtnl_fill_ifinfo.constprop.0+0x3558/0x4ad0 net/core/rtnetlink.c:2136 Code: ef 10 41 80 3c 24 00 0f 85 f4 0d 00 00 4d 3b be 30 01 00 00 0f 84 ae 05 00 00 e8 c3 fa 92 f8 49 8d 7f 28 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 c3 0d 00 00 4d 8b 6f 28 4c 89 ef e8 42 1d 10 02 RSP: 0018:ffffc90003b67068 EFLAGS: 00010206 RAX: 0000000000000003 RBX: 0000000000000000 RCX: ffffc9000de6d000 RDX: 0000000000080000 RSI: ffffffff890654fd RDI: 0000000000000018 RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffed1004789c26 R13: ffff888034409c80 R14: ffff888023c4e000 R15: fffffffffffffff0 FS: 00007fa5b87e76c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30510ff8 CR3: 0000000047fac000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rtnl_dump_ifinfo+0xbf5/0x10c0 net/core/rtnetlink.c:2476 rtnl_dumpit+0x198/0x1f0 net/core/rtnetlink.c:6791 netlink_dump+0x53c/0xd00 net/netlink/af_netlink.c:2317 netlink_recvmsg+0xa0d/0xf30 net/netlink/af_netlink.c:1973 sock_recvmsg_nosec net/socket.c:1033 [inline] ____sys_recvmsg+0x5f8/0x6b0 net/socket.c:2801 ___sys_recvmsg+0x115/0x1a0 net/socket.c:2845 do_recvmmsg+0x2f8/0x740 net/socket.c:2940 __sys_recvmmsg net/socket.c:3014 [inline] __do_sys_recvmmsg net/socket.c:3037 [inline] __se_sys_recvmmsg net/socket.c:3030 [inline] __x64_sys_recvmmsg+0x239/0x290 net/socket.c:3030 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa5b7985d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa5b87e7038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007fa5b7b76080 RCX: 00007fa5b7985d29 RDX: 000000000000010a RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00007fa5b7a01b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fa5b7b76080 R15: 00007fffb1ce8928 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:rtnl_fill_alt_ifnames net/core/rtnetlink.c:1893 [inline] RIP: 0010:rtnl_fill_prop_list net/core/rtnetlink.c:1911 [inline] RIP: 0010:rtnl_fill_ifinfo.constprop.0+0x3558/0x4ad0 net/core/rtnetlink.c:2136 Code: ef 10 41 80 3c 24 00 0f 85 f4 0d 00 00 4d 3b be 30 01 00 00 0f 84 ae 05 00 00 e8 c3 fa 92 f8 49 8d 7f 28 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 c3 0d 00 00 4d 8b 6f 28 4c 89 ef e8 42 1d 10 02 RSP: 0018:ffffc90003b67068 EFLAGS: 00010206 RAX: 0000000000000003 RBX: 0000000000000000 RCX: ffffc9000de6d000 RDX: 0000000000080000 RSI: ffffffff890654fd RDI: 0000000000000018 RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffed1004789c26 R13: ffff888034409c80 R14: ffff888023c4e000 R15: fffffffffffffff0 FS: 00007fa5b87e76c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000004021000 CR3: 0000000047fac000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: ef out %eax,(%dx) 1: 10 41 80 adc %al,-0x80(%rcx) 4: 3c 24 cmp $0x24,%al 6: 00 0f add %cl,(%rdi) 8: 85 f4 test %esi,%esp a: 0d 00 00 4d 3b or $0x3b4d0000,%eax f: be 30 01 00 00 mov $0x130,%esi 14: 0f 84 ae 05 00 00 je 0x5c8 1a: e8 c3 fa 92 f8 call 0xf892fae2 1f: 49 8d 7f 28 lea 0x28(%r15),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) <-- trapping instruction 2e: 0f 85 c3 0d 00 00 jne 0xdf7 34: 4d 8b 6f 28 mov 0x28(%r15),%r13 38: 4c 89 ef mov %r13,%rdi 3b: e8 42 1d 10 02 call 0x2101d82