================================================================== BUG: KASAN: use-after-free in hidraw_ioctl+0x609/0xae0 drivers/hid/hidraw.c:380 Read of size 4 at addr ffff8881cac08018 by task syz-executor.0/5457 CPU: 1 PID: 5457 Comm: syz-executor.0 Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xca/0x13e lib/dump_stack.c:113 print_address_description+0x6a/0x32c mm/kasan/report.c:351 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482 kasan_report+0xe/0x12 mm/kasan/common.c:618 hidraw_ioctl+0x609/0xae0 drivers/hid/hidraw.c:380 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd2d/0x1330 fs/ioctl.c:696 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:718 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459a09 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fac8816dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a09 RDX: 0000000020002440 RSI: 0000000080044801 RDI: 0000000000000008 RBP: 000000000075c1c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fac8816e6d4 R13: 00000000004c23d7 R14: 00000000004d5a20 R15: 00000000ffffffff The buggy address belongs to the page: page:ffffea00072b0200 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x0 flags: 0x200000000000000() raw: 0200000000000000 ffffea00073fbe08 ffffea0007293b08 0000000000000000 raw: 0000000000000000 0000000000000002 00000000ffffff7f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881cac07f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881cac07f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881cac08000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8881cac08080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881cac08100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================