BUG: unable to handle page fault for address: fffffffffffffeb0
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD f1b3067 P4D f1b3067 PUD f1b5067 PMD 0 
Oops: Oops: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 15465 Comm: syz.9.675 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:__lock_acquire+0x41/0x2de0 kernel/locking/lockdep.c:5140
Code: 2c 12 48 89 84 24 e0 00 00 00 65 48 8b 05 ef 4c 2c 12 48 89 44 24 08 45 31 f6 83 3d 08 26 32 0f 00 0f 84 90 14 00 00 48 89 fb <48> 8b 07 48 3d a0 d4 90 94 0f 84 7e 14 00 00 45 89 cd 89 cd 41 89
RSP: 0018:ffffc90005f4f8d8 EFLAGS: 00010002
RAX: ffff88802833be80 RBX: fffffffffffffeb0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: fffffffffffffeb0
RBP: ffff88802833be80 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000007 R12: fffffffffffffeb0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000246
FS:  00007fb2a11146c0(0000) GS:ffff88812482f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffeb0 CR3: 000000006595a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
 __mutex_lock_common kernel/locking/rtmutex_api.c:561 [inline]
 mutex_lock_nested+0x55/0x1d0 kernel/locking/rtmutex_api.c:580
 nsim_drv_port_add+0x5a/0x140 drivers/net/netdevsim/dev.c:1760
 new_port_store+0x1a5/0x280 drivers/net/netdevsim/bus.c:96
 kernfs_fop_write_iter+0x3a5/0x540 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61e/0xbb0 fs/read_write.c:687
 ksys_write+0x156/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb2a2eff559
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:00007fb2a1114028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb2a3186180 RCX: 00007fb2a2eff559
RDX: 0000000000000001 RSI: 0000200000000600 RDI: 0000000000000005
RBP: 00007fb2a2f96b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb2a3186218 R14: 00007fb2a3186180 R15: 00007ffe1f6c7bd8
 </TASK>
Modules linked in:
CR2: fffffffffffffeb0
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0x41/0x2de0 kernel/locking/lockdep.c:5140
Code: 2c 12 48 89 84 24 e0 00 00 00 65 48 8b 05 ef 4c 2c 12 48 89 44 24 08 45 31 f6 83 3d 08 26 32 0f 00 0f 84 90 14 00 00 48 89 fb <48> 8b 07 48 3d a0 d4 90 94 0f 84 7e 14 00 00 45 89 cd 89 cd 41 89
RSP: 0018:ffffc90005f4f8d8 EFLAGS: 00010002
RAX: ffff88802833be80 RBX: fffffffffffffeb0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: fffffffffffffeb0
RBP: ffff88802833be80 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000007 R12: fffffffffffffeb0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000246
FS:  00007fb2a11146c0(0000) GS:ffff88812482f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffeb0 CR3: 000000006595a000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	2c 12                	sub    $0x12,%al
   2:	48 89 84 24 e0 00 00 	mov    %rax,0xe0(%rsp)
   9:	00
   a:	65 48 8b 05 ef 4c 2c 	mov    %gs:0x122c4cef(%rip),%rax        # 0x122c4d01
  11:	12
  12:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
  17:	45 31 f6             	xor    %r14d,%r14d
  1a:	83 3d 08 26 32 0f 00 	cmpl   $0x0,0xf322608(%rip)        # 0xf322629
  21:	0f 84 90 14 00 00    	je     0x14b7
  27:	48 89 fb             	mov    %rdi,%rbx
* 2a:	48 8b 07             	mov    (%rdi),%rax <-- trapping instruction
  2d:	48 3d a0 d4 90 94    	cmp    $0xffffffff9490d4a0,%rax
  33:	0f 84 7e 14 00 00    	je     0x14b7
  39:	45 89 cd             	mov    %r9d,%r13d
  3c:	89 cd                	mov    %ecx,%ebp
  3e:	41                   	rex.B
  3f:	89                   	.byte 0x89