RDX: 0000000000000001 RSI: 0000200000000300 RDI: 0000000000000009
RBP: 00007fca6029b090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fca61b0c218 R14: 00007fca61b0c180 R15: 00007ffee84c2f28
---[ end trace 1c59c200fe18da48 ]---
general protection fault, probably for non-canonical address 0xdffffc000000001a: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000d0-0x00000000000000d7]
CPU: 0 PID: 325 Comm: syz.4.5 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__device_attach+0xae/0x410 drivers/base/dd.c:908
Code: 8d 66 68 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 e7 e8 e4 35 ef fe 4d 8b 2c 24 4d 8d a5 d0 00 00 00 4c 89 e0 48 c1 e8 03 <0f> b6 04 18 84 c0 0f 85 32 03 00 00 41 0f b6 1c 24 89 de 83 e6 01
RSP: 0018:ffffc90007af79e0 EFLAGS: 00010202
RAX: 000000000000001a RBX: dffffc0000000000 RCX: ffffffff84818172
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90007af7960
RBP: ffffc90007af7a90 R08: ffffc90007af7967 R09: 1ffff92000f5ef2c
R10: dffffc0000000000 R11: fffff52000f5ef2d R12: 00000000000000d0
R13: 0000000000000000 R14: ffff88810f1da0b8 R15: 0000000000000000
FS:  00007fca6029b6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fca618d1840 CR3: 0000000128079000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 device_attach+0x17/0x20 drivers/base/dd.c:975
 pci_bus_add_device+0x7a/0x110 drivers/pci/bus.c:324
 pci_bus_add_devices+0x94/0x1c0 drivers/pci/bus.c:347
 pci_rescan_bus+0x2c/0x40 drivers/pci/probe.c:3268
 rescan_store+0xc9/0x150 drivers/pci/pci-sysfs.c:439
 bus_attr_store+0x79/0xa0 drivers/base/bus.c:124
 sysfs_kf_write+0x129/0x150 fs/sysfs/file.c:143
 kernfs_fop_write_iter+0x2bd/0x400 fs/kernfs/file.c:296
 call_write_iter include/linux/fs.h:2072 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x770/0xd70 fs/read_write.c:605
 ksys_write+0x14a/0x260 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:667
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fca61884159
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:00007fca6029b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fca61b0c180 RCX: 00007fca61884159
RDX: 0000000000000001 RSI: 0000200000000300 RDI: 0000000000000009
RBP: 00007fca6029b090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fca61b0c218 R14: 00007fca61b0c180 R15: 00007ffee84c2f28
Modules linked in:
---[ end trace 1c59c200fe18da49 ]---
RIP: 0010:__device_attach+0xae/0x410 drivers/base/dd.c:908
Code: 8d 66 68 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 e7 e8 e4 35 ef fe 4d 8b 2c 24 4d 8d a5 d0 00 00 00 4c 89 e0 48 c1 e8 03 <0f> b6 04 18 84 c0 0f 85 32 03 00 00 41 0f b6 1c 24 89 de 83 e6 01
RSP: 0018:ffffc90007af79e0 EFLAGS: 00010202
RAX: 000000000000001a RBX: dffffc0000000000 RCX: ffffffff84818172
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90007af7960
RBP: ffffc90007af7a90 R08: ffffc90007af7967 R09: 1ffff92000f5ef2c
R10: dffffc0000000000 R11: fffff52000f5ef2d R12: 00000000000000d0
R13: 0000000000000000 R14: ffff88810f1da0b8 R15: 0000000000000000
FS:  00007fca6029b6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fca618d1840 CR3: 0000000128079000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	8d 66 68             	lea    0x68(%rsi),%esp
   3:	4c 89 e0             	mov    %r12,%rax
   6:	48 c1 e8 03          	shr    $0x3,%rax
   a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
   e:	74 08                	je     0x18
  10:	4c 89 e7             	mov    %r12,%rdi
  13:	e8 e4 35 ef fe       	call   0xfeef35fc
  18:	4d 8b 2c 24          	mov    (%r12),%r13
  1c:	4d 8d a5 d0 00 00 00 	lea    0xd0(%r13),%r12
  23:	4c 89 e0             	mov    %r12,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	0f b6 04 18          	movzbl (%rax,%rbx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 32 03 00 00    	jne    0x368
  36:	41 0f b6 1c 24       	movzbl (%r12),%ebx
  3b:	89 de                	mov    %ebx,%esi
  3d:	83 e6 01             	and    $0x1,%esi