BUG: unable to handle kernel paging request in amd_mp2_pci_probe

Status: upstream: reported C repro on 2026/08/13 12:52
Subsystems: input
[Documentation on labels]
Reported-by: syzbot+4eadd4dfe9e66522bae8@syzkaller.appspotmail.com
First crash: 9d01h, last: 4h07m
✨ AI Jobs (4)
ID Workflow Result Correct Bug Created Started Finished Revision
7a94b74c patching BUG: unable to handle kernel paging request in amd_mp2_pci_probe 2026/08/13 12:54
dddfa5d2 repro-c Reproduced: ✅ BUG: unable to handle kernel paging request in amd_mp2_pci_probe 2026/08/13 11:30 2026/08/13 11:33 2026/08/13 12:14 67796a05
60dd5b98 assessment-security 💥 BUG: unable to handle kernel paging request in amd_mp2_pci_probe 2026/08/11 00:00 2026/08/11 00:00 2026/08/11 00:00 039457bd
ec2ffee1 assessment-security 💥 BUG: unable to handle kernel paging request in amd_mp2_pci_probe 2026/08/09 07:36 2026/08/09 07:36 2026/08/09 07:36 5d63f80b
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [input?] BUG: unable to handle kernel paging request in amd_mp2_pci_probe 0 (1) 2026/08/13 12:52
Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/08/13 12:32 19m nogikh@google.com upstream report job log log

Sample crash report:
Console: switching to colour dummy device 80x25
BUG: unable to handle page fault for address: ffffc9000386468c
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 1bc00067 P4D 1bc00067 PUD 1d293067 PMD 26b0e067 PTE 0
Oops: Oops: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 6020 Comm: syz-executor364 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:readl arch/x86/include/asm/io.h:59 [inline]
RIP: 0010:mp2_select_ops drivers/hid/amd-sfh-hid/amd_sfh_pcie.c:282 [inline]
RIP: 0010:amd_mp2_pci_probe+0x43d/0x820 drivers/hid/amd-sfh-hid/amd_sfh_pcie.c:487
Code: f9 e9 c7 02 00 00 e8 52 46 f8 f8 4c 89 fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 72 03 00 00 48 8b 45 10 <8b> 98 8c 06 01 00 48 8d bd a0 00 00 00 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc9000354f810 EFLAGS: 00010246
RAX: ffffc90003854000 RBX: 0000000000000000 RCX: ffffffff89122b85
RDX: 1ffff110025a5009 RSI: ffffffff89122d2e RDI: ffff888034c9a540
RBP: ffff888012d28038 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888022e82000
R13: ffff888022e820d0 R14: ffffffff8c438280 R15: ffff888012d28048
FS:  0000555584ff9400(0000) GS:ffff8880d5dec000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc9000386468c CR3: 0000000027179000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 local_pci_probe+0xdd/0x1b0 drivers/pci/pci-driver.c:332
 pci_call_probe+0x176/0x800 drivers/pci/pci-driver.c:394
 __pci_device_probe drivers/pci/pci-driver.c:455 [inline]
 pci_device_probe+0x1cd/0x370 drivers/pci/pci-driver.c:489
 call_driver_probe drivers/base/dd.c:628 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:706
 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098
 bus_rescan_devices_helper+0xfb/0x220 drivers/base/bus.c:854
 drivers_probe_store+0x4a/0x90 drivers/base/bus.c:318
 bus_attr_store+0x74/0xb0 drivers/base/bus.c:172
 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6ac/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd76cf69e77
Code: 48 89 fa 4c 89 df e8 98 1d 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffdac17fdf0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000555584ff9400 RCX: 00007fd76cf69e77
RDX: 000000000000000d RSI: 00007ffdac17fe9c RDI: 0000000000000003
RBP: 000000000000000d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffdac17fea9
R13: 00007ffdac17fe9c R14: 00007ffdac17fe70 R15: 00007fd76cfa507a
 </TASK>
Modules linked in:
CR2: ffffc9000386468c
---[ end trace 0000000000000000 ]---
RIP: 0010:readl arch/x86/include/asm/io.h:59 [inline]
RIP: 0010:mp2_select_ops drivers/hid/amd-sfh-hid/amd_sfh_pcie.c:282 [inline]
RIP: 0010:amd_mp2_pci_probe+0x43d/0x820 drivers/hid/amd-sfh-hid/amd_sfh_pcie.c:487
Code: f9 e9 c7 02 00 00 e8 52 46 f8 f8 4c 89 fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 72 03 00 00 48 8b 45 10 <8b> 98 8c 06 01 00 48 8d bd a0 00 00 00 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc9000354f810 EFLAGS: 00010246
RAX: ffffc90003854000 RBX: 0000000000000000 RCX: ffffffff89122b85
RDX: 1ffff110025a5009 RSI: ffffffff89122d2e RDI: ffff888034c9a540
RBP: ffff888012d28038 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888022e82000
R13: ffff888022e820d0 R14: ffffffff8c438280 R15: ffff888012d28048
FS:  0000555584ff9400(0000) GS:ffff8880d5dec000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc9000386468c CR3: 0000000027179000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	f9                   	stc
   1:	e9 c7 02 00 00       	jmp    0x2cd
   6:	e8 52 46 f8 f8       	call   0xf8f8465d
   b:	4c 89 fa             	mov    %r15,%rdx
   e:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  15:	fc ff df
  18:	48 c1 ea 03          	shr    $0x3,%rdx
  1c:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
  20:	0f 85 72 03 00 00    	jne    0x398
  26:	48 8b 45 10          	mov    0x10(%rbp),%rax
* 2a:	8b 98 8c 06 01 00    	mov    0x1068c(%rax),%ebx <-- trapping instruction
  30:	48 8d bd a0 00 00 00 	lea    0xa0(%rbp),%rdi
  37:	48                   	rex.W
  38:	b8 00 00 00 00       	mov    $0x0,%eax
  3d:	00 fc                	add    %bh,%ah
  3f:	ff                   	.byte 0xff

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/13 12:51 upstream 3d6d817622b0 3c5eaa21 .config console log report C ci-qemu-upstream BUG: unable to handle kernel paging request in amd_mp2_pci_probe
2026/08/04 15:15 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: unable to handle kernel paging request in amd_mp2_pci_probe
* Struck through repros no longer work on HEAD.