Oops: general protection fault, probably for non-canonical address 0xdffffc001fffe000: 0000 [#1] SMP KASAN PTI
KASAN: probably user-memory-access in range [0x00000000ffff0000-0x00000000ffff0007]
CPU: 1 UID: 0 PID: 5815 Comm: kworker/1:3 Not tainted 6.15.0-syzkaller-12058-g64980441d269 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: mld mld_ifc_work
RIP: 0010:add_grec+0x764/0x1670 net/ipv6/mcast.c:1967
Code: 40 01 41 89 c7 31 ff 89 c6 e8 08 b3 a2 f7 45 85 ff 0f 84 b0 00 00 00 e8 ba ae a2 f7 eb 05 e8 b3 ae a2 f7 49 89 ee 49 c1 ee 03 <43> 80 3c 26 00 74 08 48 89 ef e8 9d f5 03 f8 48 8b 45 00 48 89 84
RSP: 0018:ffffc9000425f8f8 EFLAGS: 00010206
RAX: ffffffff8a1d9c16 RBX: 0000000000000000 RCX: ffff888027a33c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 00000000ffff0000 R08: ffff888027a33c00 R09: 0000000000000002
R10: 0000000000000004 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000005 R14: 000000001fffe000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff888125d89000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f84328dc0d1 CR3: 000000006bf3c000 CR4: 00000000003526f0
DR0: 0000000000000007 DR1: 000000000000000b DR2: 0000000000000002
DR3: 0000000000000009 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
mld_send_cr net/ipv6/mcast.c:2155 [inline]
mld_ifc_work+0x671/0xde0 net/ipv6/mcast.c:2702
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:add_grec+0x764/0x1670 net/ipv6/mcast.c:1967
Code: 40 01 41 89 c7 31 ff 89 c6 e8 08 b3 a2 f7 45 85 ff 0f 84 b0 00 00 00 e8 ba ae a2 f7 eb 05 e8 b3 ae a2 f7 49 89 ee 49 c1 ee 03 <43> 80 3c 26 00 74 08 48 89 ef e8 9d f5 03 f8 48 8b 45 00 48 89 84
RSP: 0018:ffffc9000425f8f8 EFLAGS: 00010206
RAX: ffffffff8a1d9c16 RBX: 0000000000000000 RCX: ffff888027a33c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 00000000ffff0000 R08: ffff888027a33c00 R09: 0000000000000002
R10: 0000000000000004 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000005 R14: 000000001fffe000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff888125d89000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f84328dc0d1 CR3: 00000000736c2000 CR4: 00000000003526f0
DR0: 0000000000000007 DR1: 000000000000000b DR2: 0000000000000002
DR3: 0000000000000009 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 41 89 c7 mov %eax,%r15d
3: 31 ff xor %edi,%edi
5: 89 c6 mov %eax,%esi
7: e8 08 b3 a2 f7 call 0xf7a2b314
c: 45 85 ff test %r15d,%r15d
f: 0f 84 b0 00 00 00 je 0xc5
15: e8 ba ae a2 f7 call 0xf7a2aed4
1a: eb 05 jmp 0x21
1c: e8 b3 ae a2 f7 call 0xf7a2aed4
21: 49 89 ee mov %rbp,%r14
24: 49 c1 ee 03 shr $0x3,%r14
* 28: 43 80 3c 26 00 cmpb $0x0,(%r14,%r12,1) <-- trapping instruction
2d: 74 08 je 0x37
2f: 48 89 ef mov %rbp,%rdi
32: e8 9d f5 03 f8 call 0xf803f5d4
37: 48 8b 45 00 mov 0x0(%rbp),%rax
3b: 48 rex.W
3c: 89 .byte 0x89
3d: 84 .byte 0x84