Re: [syzbot] [input?] [usb?] KASAN: slab-use-after-free Read in hidraw_report_event

syzbot
2026-04-28T08:51:02Z

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
INFO: trying to register non-static key in usbhid_power

INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 1 UID: 0 PID: 6580 Comm: syz.2.19 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
<TASK>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
assign_lock_key+0x133/0x150 kernel/locking/lockdep.c:986
register_lock_class+0xcc/0x2e0 kernel/locking/lockdep.c:1301
__lock_acquire+0xad/0x2cf0 kernel/locking/lockdep.c:5114
lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5870
__mutex_lock_common kernel/locking/rtmutex_api.c:534 [inline]
mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:553
usbhid_power+0x56/0x190 drivers/hid/usbhid/hid-core.c:1283
hid_hw_power include/linux/hid.h:1239 [inline]
hidraw_open+0x24d/0x8a0 drivers/hid/hidraw.c:302
chrdev_open+0x4d0/0x5f0 fs/char_dev.c:411
do_dentry_open+0x83d/0x13e0 fs/open.c:947
vfs_open+0x3b/0x350 fs/open.c:1079
do_open fs/namei.c:4699 [inline]
path_openat+0x2e43/0x38a0 fs/namei.c:4858
do_file_open+0x23e/0x4a0 fs/namei.c:4887
do_sys_openat2+0x113/0x200 fs/open.c:1364
do_sys_open fs/open.c:1370 [inline]
__do_sys_openat fs/open.c:1386 [inline]
__se_sys_openat fs/open.c:1381 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1381
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fce44f9d60e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fce4463db28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fce4463e6c0 RCX: 00007fce44f9d60e
RDX: 0000000000000002 RSI: 00007fce4463dc00 RDI: ffffffffffffff9c
RBP: 00007fce4463dc00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007fce45256038 R14: 00007fce45255fa0 R15: 00007ffd81c3c108
</TASK>

Tested on:

commit: 39704f00 Add linux-next specific files for 20260427
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=11dc1896580000
kernel config: https://syzkaller.appspot.com/x/.config?x=dea2372337a7c0e
dashboard link: https://syzkaller.appspot.com/bug?extid=9eebf5f6544c5e873858
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
patch: https://syzkaller.appspot.com/x/patch.diff?x=175e0a73980000