general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 PID: 27869 Comm: syz.6.6416 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:rose_transmit_link+0x32/0x740 net/rose/rose_link.c:266
Code: 56 41 55 41 54 53 48 83 ec 18 48 89 f5 49 89 fc 49 be 00 00 00 00 00 fc ff df e8 49 b6 0d f8 4c 8d 7d 36 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 65 05 00 00 41 0f b6 1f 31 ff 89 de e8
RSP: 0018:ffffc9000470f910 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000ffd5000 RSI: 000000000000a9bf RDI: 000000000000a9c0
RBP: 0000000000000000 R08: ffff88802f661e00 R09: 0000000000000008
R10: 000000000000000f R11: 0000000000000002 R12: ffff88804136b8c0
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000036
FS: 00007f7e404556c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30420ff8 CR3: 00000000645de000 CR4: 00000000003506f0
DR0: 0000000000000008 DR1: 0000000000000007 DR2: 0000000000000004
DR3: 0000000000000008 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
rose_write_internal+0x124b/0x1b50 net/rose/rose_subr.c:198
rose_release+0x236/0x4e0 net/rose/af_rose.c:671
__sock_release net/socket.c:659 [inline]
sock_close+0xbd/0x230 net/socket.c:1420
__fput+0x234/0x970 fs/file_table.c:384
task_work_run+0x1d4/0x260 kernel/task_work.c:245
get_signal+0x1235/0x13f0 kernel/signal.c:2678
arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7e3f59c629
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7e40455028 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: 0000000000000000 RBX: 00007f7e3f815fa0 RCX: 00007f7e3f59c629
RDX: 000000000000001c RSI: 0000200000000040 RDI: 0000000000000004
RBP: 00007f7e3f632b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7e3f816038 R14: 00007f7e3f815fa0 R15: 00007fff869f3d98
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:rose_transmit_link+0x32/0x740 net/rose/rose_link.c:266
Code: 56 41 55 41 54 53 48 83 ec 18 48 89 f5 49 89 fc 49 be 00 00 00 00 00 fc ff df e8 49 b6 0d f8 4c 8d 7d 36 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 65 05 00 00 41 0f b6 1f 31 ff 89 de e8
RSP: 0018:ffffc9000470f910 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000ffd5000 RSI: 000000000000a9bf RDI: 000000000000a9c0
RBP: 0000000000000000 R08: ffff88802f661e00 R09: 0000000000000008
R10: 000000000000000f R11: 0000000000000002 R12: ffff88804136b8c0
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000036
FS: 00007f7e404556c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30420ff8 CR3: 00000000645de000 CR4: 00000000003506f0
DR0: 0000000000000008 DR1: 0000000000000007 DR2: 0000000000000004
DR3: 0000000000000008 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 56 push %rsi
1: 41 55 push %r13
3: 41 54 push %r12
5: 53 push %rbx
6: 48 83 ec 18 sub $0x18,%rsp
a: 48 89 f5 mov %rsi,%rbp
d: 49 89 fc mov %rdi,%r12
10: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14
17: fc ff df
1a: e8 49 b6 0d f8 call 0xf80db668
1f: 4c 8d 7d 36 lea 0x36(%rbp),%r15
23: 4c 89 f8 mov %r15,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 65 05 00 00 jne 0x59c
37: 41 0f b6 1f movzbl (%r15),%ebx
3b: 31 ff xor %edi,%edi
3d: 89 de mov %ebx,%esi
3f: e8 .byte 0xe8