general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 PID: 7963 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-05204-g237bb5f7f7f5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:rose_transmit_link+0x32/0x6f0 net/rose/rose_link.c:266
Code: 56 41 55 41 54 53 48 83 ec 28 48 89 f5 49 89 fc 49 bf 00 00 00 00 00 fc ff df e8 49 e0 3a f7 48 8d 5d 32 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 4c 05 00 00 0f b6 1b 31 ff 89 de e8 25
RSP: 0018:ffffc90004f67920 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000032 RCX: 0000000000040000
RDX: ffffc9000c40a000 RSI: 0000000000000a47 RDI: 0000000000000a48
RBP: 0000000000000000 R08: 0000000000000005 R09: ffffffff8a5a9f2c
R10: 0000000000000008 R11: ffff888081e30000 R12: ffff88803331e000
R13: 1ffff920009ecf3c R14: 0000000000000000 R15: dffffc0000000000
FS:  00007fe5d2dff6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 0000000037790000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rose_write_internal+0x1498/0x1f00 net/rose/rose_subr.c:198
 rose_release+0x29e/0x5a0 net/rose/af_rose.c:671
 __sock_release net/socket.c:659 [inline]
 sock_close+0xbc/0x240 net/socket.c:1421
 __fput+0x429/0x8a0 fs/file_table.c:423
 task_work_run+0x24f/0x310 kernel/task_work.c:180
 get_signal+0x1673/0x1850 kernel/signal.c:2683
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0xc9/0x360 kernel/entry/common.c:212
 do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fe5d3a7dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe5d2dff0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: 0000000000000000 RBX: 00007fe5d3babf80 RCX: 00007fe5d3a7dda9
RDX: 0000000000000040 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00007fe5d3aca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fe5d3babf80 R15: 00007fff58e44e08
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:rose_transmit_link+0x32/0x6f0 net/rose/rose_link.c:266
Code: 56 41 55 41 54 53 48 83 ec 28 48 89 f5 49 89 fc 49 bf 00 00 00 00 00 fc ff df e8 49 e0 3a f7 48 8d 5d 32 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 4c 05 00 00 0f b6 1b 31 ff 89 de e8 25
RSP: 0018:ffffc90004f67920 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000032 RCX: 0000000000040000
RDX: ffffc9000c40a000 RSI: 0000000000000a47 RDI: 0000000000000a48
RBP: 0000000000000000 R08: 0000000000000005 R09: ffffffff8a5a9f2c
R10: 0000000000000008 R11: ffff888081e30000 R12: ffff88803331e000
R13: 1ffff920009ecf3c R14: 0000000000000000 R15: dffffc0000000000
FS:  00007fe5d2dff6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c825000 CR3: 0000000037790000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 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 28          	sub    $0x28,%rsp
   a:	48 89 f5             	mov    %rsi,%rbp
   d:	49 89 fc             	mov    %rdi,%r12
  10:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
  17:	fc ff df
  1a:	e8 49 e0 3a f7       	call   0xf73ae068
  1f:	48 8d 5d 32          	lea    0x32(%rbp),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 4c 05 00 00    	jne    0x583
  37:	0f b6 1b             	movzbl (%rbx),%ebx
  3a:	31 ff                	xor    %edi,%edi
  3c:	89 de                	mov    %ebx,%esi
  3e:	e8                   	.byte 0xe8
  3f:	25                   	.byte 0x25