kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
BUG: unable to handle page fault for address: ffffffff85bf5da8
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0011) - permissions violation
PGD 6412067 P4D 6412067 PUD 6413063 PMD 8000000005a001e1 
Oops: 0011 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1589 Comm: syz.2.363 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:rx_queue_ktype+0x0/0x58
Code: 00 00 00 50 5e 05 81 88 ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <c0> 2e ab 83 ff ff ff ff 20 bf 6f 85 ff ff ff ff 00 00 00 00 00 00
RSP: 0018:ffffc90000e477d0 EFLAGS: 00010282
RAX: ffffffff85bf5da8 RBX: ffff888108587200 RCX: dffffc0000000000
RDX: ffffc900028d0000 RSI: 0000000000000294 RDI: ffff888118e73000
RBP: ffffc90000e47830 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520001c8eec R12: ffff88810b8c9d38
R13: ffff888108587218 R14: ffffffff8681cb60 R15: ffff888118e73000
FS:  00007f7ccf6f06c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff85bf5da8 CR3: 000000011da45000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kobject_add_varg lib/kobject.c:398 [inline]
 kobject_add+0x165/0x230 lib/kobject.c:450
 class_dir_create_and_add drivers/base/core.c:2825 [inline]
 get_device_parent+0x3a6/0x410 drivers/base/core.c:2880
 device_add+0x349/0xc00 drivers/base/core.c:3192
 device_create_groups_vargs drivers/base/core.c:3960 [inline]
 device_create+0x26c/0x300 drivers/base/core.c:4002
 create_function_device+0x60/0x70 drivers/usb/gadget/configfs.c:31
 create_alsa_device drivers/usb/gadget/function/f_midi.c:1262 [inline]
 f_midi_alloc_inst+0x1a8/0x380 drivers/usb/gadget/function/f_midi.c:1303
 try_get_usb_function_instance drivers/usb/gadget/functions.c:28 [inline]
 usb_get_function_instance+0xe2/0x2f0 drivers/usb/gadget/functions.c:44
 function_make+0x118/0x350 drivers/usb/gadget/configfs.c:636
 configfs_mkdir+0x5d2/0xd90 fs/configfs/dir.c:1354
 vfs_mkdir+0x42c/0x600 fs/namei.c:3798
 do_mkdirat+0x14c/0x340 fs/namei.c:3820
 __do_sys_mkdirat fs/namei.c:3831 [inline]
 __se_sys_mkdirat fs/namei.c:3829 [inline]
 __x64_sys_mkdirat+0x7b/0x90 fs/namei.c:3829
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f7cd0c970d9
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:00007f7ccf6f0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f7cd0f1efa0 RCX: 00007f7cd0c970d9
RDX: 00000000000001ff RSI: 00002000000003c0 RDI: ffffffffffffff9c
RBP: 00007f7cd0d2e024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7cd0f1f038 R14: 00007f7cd0f1efa0 R15: 00007ffc1ee8c4b8
Modules linked in:
CR2: ffffffff85bf5da8
---[ end trace b9b6697135c5b164 ]---
RIP: 0010:rx_queue_ktype+0x0/0x58
Code: 00 00 00 50 5e 05 81 88 ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <c0> 2e ab 83 ff ff ff ff 20 bf 6f 85 ff ff ff ff 00 00 00 00 00 00
RSP: 0018:ffffc90000e477d0 EFLAGS: 00010282
RAX: ffffffff85bf5da8 RBX: ffff888108587200 RCX: dffffc0000000000
RDX: ffffc900028d0000 RSI: 0000000000000294 RDI: ffff888118e73000
RBP: ffffc90000e47830 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520001c8eec R12: ffff88810b8c9d38
R13: ffff888108587218 R14: ffffffff8681cb60 R15: ffff888118e73000
FS:  00007f7ccf6f06c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff85bf5da8 CR3: 000000011da45000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 50 5e             	add    %dl,0x5e(%rax)
   5:	05 81 88 ff ff       	add    $0xffff8881,%eax
* 2a:	c0 2e ab             	shrb   $0xab,(%rsi) <-- trapping instruction
  2d:	83 ff ff             	cmp    $0xffffffff,%edi
  30:	ff                   	(bad)
  31:	ff 20                	jmp    *(%rax)
  33:	bf 6f 85 ff ff       	mov    $0xffff856f,%edi
  38:	ff                   	(bad)
  39:	ff 00                	incl   (%rax)
  3b:	00 00                	add    %al,(%rax)
  3d:	00 00                	add    %al,(%rax)