BUG: unable to handle page fault for address: ffffc9000da21010
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 19400067 P4D 19400067 PUD 1a2e1067 PMD 308f3067 PTE 0
Oops: Oops: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 5889 Comm: kworker/1:4 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:kcov_remote_area_get kernel/kcov.c:142 [inline]
RIP: 0010:kcov_remote_start+0x2a2/0x6f0 kernel/kcov.c:906
Code: dc 8c 4c 8b b8 b0 1b 81 91 bd 00 00 04 00 eb 4f 41 8b ae a4 00 00 00 49 c7 c7 40 c4 3f 8d 4d 8b 3f 49 81 ff 40 c4 3f 8d 74 4c <41> 39 6f 10 75 ee 4c 89 ff e8 40 ae c0 02 84 c0 74 0e 49 8b 07 49
RSP: 0018:ffffc90005167768 EFLAGS: 00010287
RAX: 0000000000000000 RBX: ffff88802ecc9e00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8b1d9600
RBP: 0000000000100000 R08: 0000000000000000 R09: ffffffff8ab80501
R10: dffffc0000000000 R11: fffffbfff1d6d2a7 R12: 0000000000000002
R13: 0000000000000001 R14: ffff88802ea68500 R15: ffffc9000da21000
FS:  0000000000000000(0000) GS:ffff888127117000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc9000da21010 CR3: 000000004cf66000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kcov_remote_start_usb include/linux/kcov.h:55 [inline]
 hub_event+0x158/0x4a20 drivers/usb/core/hub.c:5888
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
CR2: ffffc9000da21010
---[ end trace 0000000000000000 ]---
RIP: 0010:kcov_remote_area_get kernel/kcov.c:142 [inline]
RIP: 0010:kcov_remote_start+0x2a2/0x6f0 kernel/kcov.c:906
Code: dc 8c 4c 8b b8 b0 1b 81 91 bd 00 00 04 00 eb 4f 41 8b ae a4 00 00 00 49 c7 c7 40 c4 3f 8d 4d 8b 3f 49 81 ff 40 c4 3f 8d 74 4c <41> 39 6f 10 75 ee 4c 89 ff e8 40 ae c0 02 84 c0 74 0e 49 8b 07 49
RSP: 0018:ffffc90005167768 EFLAGS: 00010287
RAX: 0000000000000000 RBX: ffff88802ecc9e00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8b1d9600
RBP: 0000000000100000 R08: 0000000000000000 R09: ffffffff8ab80501
R10: dffffc0000000000 R11: fffffbfff1d6d2a7 R12: 0000000000000002
R13: 0000000000000001 R14: ffff88802ea68500 R15: ffffc9000da21000
FS:  0000000000000000(0000) GS:ffff888127117000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc9000da21010 CR3: 000000004cf66000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	dc 8c 4c 8b b8 b0 1b 	fmull  0x1bb0b88b(%rsp,%rcx,2)
   7:	81 91 bd 00 00 04 00 	adcl   $0x414feb00,0x40000bd(%rcx)
   e:	eb 4f 41
  11:	8b ae a4 00 00 00    	mov    0xa4(%rsi),%ebp
  17:	49 c7 c7 40 c4 3f 8d 	mov    $0xffffffff8d3fc440,%r15
  1e:	4d 8b 3f             	mov    (%r15),%r15
  21:	49 81 ff 40 c4 3f 8d 	cmp    $0xffffffff8d3fc440,%r15
  28:	74 4c                	je     0x76
* 2a:	41 39 6f 10          	cmp    %ebp,0x10(%r15) <-- trapping instruction
  2e:	75 ee                	jne    0x1e
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 40 ae c0 02       	call   0x2c0ae78
  38:	84 c0                	test   %al,%al
  3a:	74 0e                	je     0x4a
  3c:	49 8b 07             	mov    (%r15),%rax
  3f:	49                   	rex.WB