[Android 6.1] general protection fault in __device_attach

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 78fe8913d1b2 UPSTREAM: mm,kfence: decouple kfence from pag..
git tree: android14-6.1
console+strace: https://syzkaller.appspot.com/x/log.txt?x=14bf6a35280000
kernel config: https://syzkaller.appspot.com/x/.config?x=772a621c45fe488b
dashboard link: https://syzkaller.appspot.com/bug?extid=0c679ec3d59566f18c1d
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12bde669280000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=107ca799280000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/2ffd6907a228/disk-78fe8913.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6e13c21c17f8/vmlinux-78fe8913.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8089836eb679/bzImage-78fe8913.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0c679e...@syzkaller.appspotmail.com

RBP: 00007ffe62e21f90 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe62e21f8c R14: 00007ffe62e21fb0 R15: 00007ffe62e21fa0
</TASK>
general protection fault, probably for non-canonical address 0xdffffc000000001a: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000d0-0x00000000000000d7]
CPU: 1 PID: 310 Comm: syz-executor275 Not tainted 6.1.25-syzkaller-00320-g78fe8913d1b2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:__device_attach+0xb4/0x500 drivers/base/dd.c:984
Code: 5c 24 48 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 9d a5 c9 fe 4c 8b 2b 49 8d 9d d0 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 bf 03 00 00 0f b6 1b 89 de 83 e6 01 45
RSP: 0018:ffffc90000f17580 EFLAGS: 00010202
RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffff88810f7c1300
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90000f17500
RBP: ffffc90000f17650 R08: dffffc0000000000 R09: fffff520001e2ea1
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881095c2830
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8881095c2830
FS: 0000555556380300(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fea981ab1f0 CR3: 0000000120661000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
device_attach+0x17/0x20 drivers/base/dd.c:1051
proc_ioctl+0x428/0x600 drivers/usb/core/devio.c:2356
proc_ioctl_default drivers/usb/core/devio.c:2391 [inline]
usbdev_do_ioctl drivers/usb/core/devio.c:2747 [inline]
usbdev_ioctl+0x310c/0x5f90 drivers/usb/core/devio.c:2807
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0x114/0x190 fs/ioctl.c:856
__x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fea9817b859
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe62e21f78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fea981bf184 RCX: 00007fea9817b859
RDX: 0000000020000080 RSI: 00000000c0105512 RDI: 0000000000000007
RBP: 00007ffe62e21f90 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000ffff R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffe62e21f8c R14: 00007ffe62e21fb0 R15: 00007ffe62e21fa0
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__device_attach+0xb4/0x500 drivers/base/dd.c:984
Code: 5c 24 48 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 9d a5 c9 fe 4c 8b 2b 49 8d 9d d0 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 bf 03 00 00 0f b6 1b 89 de 83 e6 01 45
RSP: 0018:ffffc90000f17580 EFLAGS: 00010202
RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffff88810f7c1300
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90000f17500
RBP: ffffc90000f17650 R08: dffffc0000000000 R09: fffff520001e2ea1
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881095c2830
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8881095c2830
FS: 0000555556380300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fea981ec140 CR3: 0000000120661000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 5c pop %rsp
1: 24 48 and $0x48,%al
3: 48 89 d8 mov %rbx,%rax
6: 48 c1 e8 03 shr $0x3,%rax
a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
f: 74 08 je 0x19
11: 48 89 df mov %rbx,%rdi
14: e8 9d a5 c9 fe callq 0xfec9a5b6
19: 4c 8b 2b mov (%rbx),%r13
1c: 49 8d 9d d0 00 00 00 lea 0xd0(%r13),%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 bf 03 00 00 jne 0x3f6
37: 0f b6 1b movzbl (%rbx),%ebx
3a: 89 de mov %ebx,%esi
3c: 83 e6 01 and $0x1,%esi
3f: 45 rex.RB


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