Oops: general protection fault, probably for non-canonical address 0xdffffc0000000018: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7]
CPU: 1 UID: 0 PID: 5814 Comm: syz-executor Not tainted 6.15.0-rc6-syzkaller-00278-g172a9d94339c #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__in6_dev_get include/net/addrconf.h:347 [inline]
RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:443 [inline]
RIP: 0010:find_match+0xa3/0xc90 net/ipv6/route.c:781
Code: 00 00 00 00 00 fc ff df 42 80 7c 25 00 00 74 08 48 89 df e8 8f 5d 17 f8 48 89 d8 bb c0 00 00 00 48 03 18 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 6e 5d 17 f8 48 8b 1b e8 06 17 47
RSP: 0018:ffffc90000a08120 EFLAGS: 00010206
RAX: 0000000000000018 RBX: 00000000000000c0 RCX: 0000000000000100
RDX: ffff888029ff1e00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffffffff339d2e3 R08: ffffc90000a08420 R09: ffffc90000a08430
R10: ffffc90000a08280 R11: fffff52000141052 R12: dffffc0000000000
R13: 0000000000000003 R14: 1ffffffff339d2e5 R15: ffffffff99ce972f
FS: 0000000000000000(0000) GS:ffff8881261f6000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f689af51368 CR3: 0000000031ae0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__find_rr_leaf+0x23a/0x6d0 net/ipv6/route.c:869
find_rr_leaf net/ipv6/route.c:899 [inline]
rt6_select net/ipv6/route.c:934 [inline]
fib6_table_lookup+0x53f/0xa80 net/ipv6/route.c:2230
ip6_pol_route+0x222/0x1180 net/ipv6/route.c:2266
pol_lookup_func include/net/ip6_fib.h:616 [inline]
fib6_rule_lookup+0x52f/0x6f0 net/ipv6/fib6_rules.c:120
ip6_route_input_lookup net/ipv6/route.c:2335 [inline]
ip6_route_input+0x6ce/0xa50 net/ipv6/route.c:2631
ip6_rcv_finish+0x141/0x2d0 net/ipv6/ip6_input.c:77
NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:314
__netif_receive_skb_one_core net/core/dev.c:5887 [inline]
__netif_receive_skb+0xd3/0x380 net/core/dev.c:6000
process_backlog+0x60e/0x14f0 net/core/dev.c:6352
__napi_poll+0xc4/0x480 net/core/dev.c:7324
napi_poll net/core/dev.c:7388 [inline]
net_rx_action+0x6ea/0xdf0 net/core/dev.c:7510
handle_softirqs+0x286/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5870
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 4b 60 d4 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9000493f9f8 EFLAGS: 00000206
RAX: d8cdbb507f0d8e00 RBX: 0000000000000000 RCX: d8cdbb507f0d8e00
RDX: 0000000000000001 RSI: ffffffff8d924660 RDI: ffffffff8bc12000
RBP: ffffffff822aa71a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff822aa71a R12: 0000000000000002
R13: ffffffff8df3dce0 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
__page_table_check_zero+0xd7/0x510 mm/page_table_check.c:138
page_table_check_free include/linux/page_table_check.h:41 [inline]
free_pages_prepare mm/page_alloc.c:1263 [inline]
__free_frozen_pages+0xb19/0xcd0 mm/page_alloc.c:2725
vfree+0x1a6/0x330 mm/vmalloc.c:3384
kcov_put kernel/kcov.c:439 [inline]
kcov_close+0x28/0x50 kernel/kcov.c:535
__fput+0x449/0xa70 fs/file_table.c:465
task_work_run+0x1d1/0x260 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x8d6/0x2550 kernel/exit.c:953
do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
__do_sys_exit_group kernel/exit.c:1113 [inline]
__se_sys_exit_group kernel/exit.c:1111 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1111
x64_sys_call+0x21ba/0x21c0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efc8278e969
Code: Unable to access opcode bytes at 0x7efc8278e93f.
RSP: 002b:00007ffc0768f148 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007efc8278e969
RDX: 00007efc8278d3e0 RSI: 0000000000000004 RDI: 0000000000000001
RBP: 00007efc829b6738 R08: 00007ffc0768cee7 R09: 0000000000000008
R10: 0000000000000019 R11: 0000000000000246 R12: 0000000000000008
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__in6_dev_get include/net/addrconf.h:347 [inline]
RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:443 [inline]
RIP: 0010:find_match+0xa3/0xc90 net/ipv6/route.c:781
Code: 00 00 00 00 00 fc ff df 42 80 7c 25 00 00 74 08 48 89 df e8 8f 5d 17 f8 48 89 d8 bb c0 00 00 00 48 03 18 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 6e 5d 17 f8 48 8b 1b e8 06 17 47
RSP: 0018:ffffc90000a08120 EFLAGS: 00010206
RAX: 0000000000000018 RBX: 00000000000000c0 RCX: 0000000000000100
RDX: ffff888029ff1e00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffffffff339d2e3 R08: ffffc90000a08420 R09: ffffc90000a08430
R10: ffffc90000a08280 R11: fffff52000141052 R12: dffffc0000000000
R13: 0000000000000003 R14: 1ffffffff339d2e5 R15: ffffffff99ce972f
FS: 0000000000000000(0000) GS:ffff8881261f6000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f689af51368 CR3: 0000000031ae0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 7 bytes skipped:
0: df 42 80 filds -0x80(%rdx)
3: 7c 25 jl 0x2a
5: 00 00 add %al,(%rax)
7: 74 08 je 0x11
9: 48 89 df mov %rbx,%rdi
c: e8 8f 5d 17 f8 call 0xf8175da0
11: 48 89 d8 mov %rbx,%rax
14: bb c0 00 00 00 mov $0xc0,%ebx
19: 48 03 18 add (%rax),%rbx
1c: 48 89 d8 mov %rbx,%rax
1f: 48 c1 e8 03 shr $0x3,%rax
* 23: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
28: 74 08 je 0x32
2a: 48 89 df mov %rbx,%rdi
2d: e8 6e 5d 17 f8 call 0xf8175da0
32: 48 8b 1b mov (%rbx),%rbx
35: e8 .byte 0xe8
36: 06 (bad)
37: 17 (bad)
38: 47 rex.RXB