pci (null):   bridge window [mem 0xfe800000-0xfe9fffff]
pci (null):   bridge window [mem 0xfe000000-0xfe1fffff 64bit pref]
pci (null): enabling Extended Tags
------------[ cut here ]------------
ret < 0
WARNING: drivers/pci/probe.c:2770 at pci_device_add+0x1343/0x1820 drivers/pci/probe.c:2770, CPU#0: syz.5.1160/10306
Modules linked in:
CPU: 0 UID: 0 PID: 10306 Comm: syz.5.1160 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:pci_device_add+0x1343/0x1820 drivers/pci/probe.c:2770
Code: e5 04 83 e0 8f 09 e8 88 83 c8 00 00 00 e9 20 f4 ff ff e8 90 d2 a4 fc 90 0f 0b 90 90 0f 0b 90 e9 06 f7 ff ff e8 7e d2 a4 fc 90 <0f> 0b 90 e9 7e fa ff ff e8 70 d2 a4 fc 90 0f 0b 90 e9 11 fa ff ff
RSP: 0018:ffffc9000fe27910 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00000000ffffffea RCX: 0000000000000000
RDX: ffff888029638000 RSI: ffffffff85668f52 RDI: ffff888029638000
RBP: ffff88801c6e5000 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffea R11: 0000000000000001 R12: ffff888021966028
R13: ffff888021966000 R14: 0000000000000001 R15: ffff88806e324000
FS:  0000000000000000(0000) GS:ffff888096960000(0063) knlGS:00000000f53d5b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000564abf251a40 CR3: 000000007357f000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 pci_scan_single_device drivers/pci/probe.c:2794 [inline]
 pci_scan_single_device+0x1d0/0x240 drivers/pci/probe.c:2780
 pci_scan_slot+0x1c9/0x7c0 drivers/pci/probe.c:2877
 pci_scan_child_bus_extend+0x6b/0x7b0 drivers/pci/probe.c:3096
 pci_scan_child_bus drivers/pci/probe.c:3209 [inline]
 pci_rescan_bus+0x18/0x40 drivers/pci/probe.c:3500
 rescan_store+0xfb/0x130 drivers/pci/pci-sysfs.c:474
 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+0x6af/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291
 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f34fec
Code: Unable to access opcode bytes at 0xf7f34fc2.
RSP: 002b:00000000f53d550c EFLAGS: 00000292 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000080000600
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>