Oops: general protection fault, probably for non-canonical address 0xdffffc001fffe03a: 0000 [#1] SMP KASAN PTI KASAN: probably user-memory-access in range [0x00000000ffff01d0-0x00000000ffff01d7] CPU: 1 UID: 0 PID: 29102 Comm: syz.4.6459 Not tainted 6.16.0-syzkaller-12091-g89886abd0734 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:____ip_mc_inc_group+0x214/0xde0 net/ipv4/igmp.c:-1 Code: b7 89 05 01 48 c7 c7 00 90 9e 8c be ec 05 00 00 48 c7 c2 80 90 9e 8c e8 ba 1a 9a f7 44 89 e8 4d 8d 34 c6 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 ee aa 1f f8 4d 8b 2e 4d 85 ed 0f 84 RSP: 0018:ffffc90003c6fa10 EFLAGS: 00010206 RAX: 000000001fffe03a RBX: dffffc0000000000 RCX: ffff88806e8b3c00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff8f5348a7 R09: 1ffffffff1ea6914 R10: dffffc0000000000 R11: fffffbfff1ea6915 R12: 00000000020000e0 R13: 000000000000003a R14: 00000000ffff01d0 R15: 0000000000000cc0 FS: 00007ff8157db6c0(0000) GS:ffff888125d21000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000180 CR3: 0000000078604000 CR4: 00000000003526f0 Call Trace: __ip_mc_join_group+0x431/0x510 net/ipv4/igmp.c:2305 ip_mcast_join_leave+0x18e/0x210 net/ipv4/ip_sockglue.c:863 do_ip_setsockopt+0x1c79/0x2d00 net/ipv4/ip_sockglue.c:1328 ip_setsockopt+0x66/0x110 net/ipv4/ip_sockglue.c:1417 do_sock_setsockopt+0x17c/0x1b0 net/socket.c:2344 __sys_setsockopt net/socket.c:2369 [inline] __do_sys_setsockopt net/socket.c:2375 [inline] __se_sys_setsockopt net/socket.c:2372 [inline] __x64_sys_setsockopt+0x13f/0x1b0 net/socket.c:2372 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff81498ebe9 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:00007ff8157db038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ff814bb5fa0 RCX: 00007ff81498ebe9 RDX: 000000000000002a RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007ff814a11e19 R08: 0000000000000088 R09: 0000000000000000 R10: 0000200000000180 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff814bb6038 R14: 00007ff814bb5fa0 R15: 00007ffc5d565098 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:____ip_mc_inc_group+0x214/0xde0 net/ipv4/igmp.c:-1 Code: b7 89 05 01 48 c7 c7 00 90 9e 8c be ec 05 00 00 48 c7 c2 80 90 9e 8c e8 ba 1a 9a f7 44 89 e8 4d 8d 34 c6 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 ee aa 1f f8 4d 8b 2e 4d 85 ed 0f 84 RSP: 0018:ffffc90003c6fa10 EFLAGS: 00010206 RAX: 000000001fffe03a RBX: dffffc0000000000 RCX: ffff88806e8b3c00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff8f5348a7 R09: 1ffffffff1ea6914 R10: dffffc0000000000 R11: fffffbfff1ea6915 R12: 00000000020000e0 R13: 000000000000003a R14: 00000000ffff01d0 R15: 0000000000000cc0 FS: 00007ff8157db6c0(0000) GS:ffff888125c21000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff8157b9f98 CR3: 0000000078604000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: b7 89 mov $0x89,%bh 2: 05 01 48 c7 c7 add $0xc7c74801,%eax 7: 00 90 9e 8c be ec add %dl,-0x13417362(%rax) d: 05 00 00 48 c7 add $0xc7480000,%eax 12: c2 80 90 ret $0x9080 15: 9e sahf 16: 8c e8 mov %gs,%eax 18: ba 1a 9a f7 44 mov $0x44f79a1a,%edx 1d: 89 e8 mov %ebp,%eax 1f: 4d 8d 34 c6 lea (%r14,%rax,8),%r14 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 f7 mov %r14,%rdi 33: e8 ee aa 1f f8 call 0xf81fab26 38: 4d 8b 2e mov (%r14),%r13 3b: 4d 85 ed test %r13,%r13 3e: 0f .byte 0xf 3f: 84 .byte 0x84