================================================================== BUG: KASAN: use-after-free in hidraw_ioctl+0x609/0xaf0 /drivers/hid/hidraw.c:380 Read of size 4 at addr ffff8881d549a118 by task syz-executor073/2445 CPU: 0 PID: 2445 Comm: syz-executor073 Not tainted 5.2.0-rc6+ #15 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+0x67/0x231 /mm/kasan/report.c:188 __kasan_report.cold+0x1a/0x32 /mm/kasan/report.c:317 kasan_report+0xe/0x20 /mm/kasan/common.c:614 hidraw_ioctl+0x609/0xaf0 /drivers/hid/hidraw.c:380 vfs_ioctl /fs/ioctl.c:46 [inline] file_ioctl /fs/ioctl.c:509 [inline] do_vfs_ioctl+0xcda/0x12e0 /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+0xb7/0x560 /arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x451fd9 Code: e8 ec e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 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 0f 83 5b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f3144bd5ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000006e3c88 RCX: 0000000000451fd9 RDX: 00000000200015c0 RSI: 0000000080044801 RDI: 0000000000000005 RBP: 00000000006e3c80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e3c8c R13: 00007ffc64ba492f R14: 00007f3144bd69c0 R15: 0000000000000002 Allocated by task 5: save_stack+0x1b/0x80 /mm/kasan/common.c:71 set_track /mm/kasan/common.c:79 [inline] __kasan_kmalloc /mm/kasan/common.c:489 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 /mm/kasan/common.c:462 kmalloc /./include/linux/slab.h:547 [inline] kzalloc /./include/linux/slab.h:742 [inline] hid_allocate_device+0x3e/0x480 /drivers/hid/hid-core.c:2389 usbhid_probe+0x23e/0xfa0 /drivers/hid/usbhid/hid-core.c:1321 usb_probe_interface+0x305/0x7a0 /drivers/usb/core/driver.c:361 really_probe+0x281/0x660 /drivers/base/dd.c:509 driver_probe_device+0x104/0x210 /drivers/base/dd.c:670 __device_attach_driver+0x1c2/0x220 /drivers/base/dd.c:777 bus_for_each_drv+0x15c/0x1e0 /drivers/base/bus.c:454 __device_attach+0x217/0x360 /drivers/base/dd.c:843 bus_probe_device+0x1e4/0x290 /drivers/base/bus.c:514 device_add+0xae6/0x16f0 /drivers/base/core.c:2111 usb_set_configuration+0xdf6/0x1670 /drivers/usb/core/message.c:2023 generic_probe+0x9d/0xd5 /drivers/usb/core/generic.c:210 usb_probe_device+0x99/0x100 /drivers/usb/core/driver.c:266 really_probe+0x281/0x660 /drivers/base/dd.c:509 driver_probe_device+0x104/0x210 /drivers/base/dd.c:670 __device_attach_driver+0x1c2/0x220 /drivers/base/dd.c:777 bus_for_each_drv+0x15c/0x1e0 /drivers/base/bus.c:454 __device_attach+0x217/0x360 /drivers/base/dd.c:843 bus_probe_device+0x1e4/0x290 /drivers/base/bus.c:514 device_add+0xae6/0x16f0 /drivers/base/core.c:2111 usb_new_device.cold+0x6a4/0xe61 /drivers/usb/core/hub.c:2536 hub_port_connect /drivers/usb/core/hub.c:5098 [inline] hub_port_connect_change /drivers/usb/core/hub.c:5213 [inline] port_event /drivers/usb/core/hub.c:5359 [inline] hub_event+0x1abd/0x3550 /drivers/usb/core/hub.c:5441 process_one_work+0x905/0x1570 /kernel/workqueue.c:2269 worker_thread+0x96/0xe20 /kernel/workqueue.c:2415 kthread+0x30b/0x410 /kernel/kthread.c:255 ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352 Freed by task 1781: save_stack+0x1b/0x80 /mm/kasan/common.c:71 set_track /mm/kasan/common.c:79 [inline] __kasan_slab_free+0x130/0x180 /mm/kasan/common.c:451 slab_free_hook /mm/slub.c:1421 [inline] slab_free_freelist_hook /mm/slub.c:1448 [inline] slab_free /mm/slub.c:2994 [inline] kfree+0xd7/0x280 /mm/slub.c:3949 device_release+0x71/0x200 /drivers/base/core.c:1064 kobject_cleanup /lib/kobject.c:691 [inline] kobject_release /lib/kobject.c:720 [inline] kref_put /./include/linux/kref.h:65 [inline] kobject_put+0x171/0x280 /lib/kobject.c:737 put_device+0x1b/0x30 /drivers/base/core.c:2210 usbhid_disconnect+0x90/0xd0 /drivers/hid/usbhid/hid-core.c:1413 usb_unbind_interface+0x1bd/0x8a0 /drivers/usb/core/driver.c:423 __device_release_driver /drivers/base/dd.c:1081 [inline] device_release_driver_internal+0x404/0x4c0 /drivers/base/dd.c:1112 bus_remove_device+0x2dc/0x4a0 /drivers/base/bus.c:556 device_del+0x460/0xb80 /drivers/base/core.c:2274 usb_disable_device+0x211/0x690 /drivers/usb/core/message.c:1237 usb_disconnect+0x284/0x830 /drivers/usb/core/hub.c:2199 hub_port_connect /drivers/usb/core/hub.c:4949 [inline] hub_port_connect_change /drivers/usb/core/hub.c:5213 [inline] port_event /drivers/usb/core/hub.c:5359 [inline] hub_event+0x13bd/0x3550 /drivers/usb/core/hub.c:5441 process_one_work+0x905/0x1570 /kernel/workqueue.c:2269 worker_thread+0x96/0xe20 /kernel/workqueue.c:2415 kthread+0x30b/0x410 /kernel/kthread.c:255 ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8881d549a100 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 24 bytes inside of 8192-byte region [ffff8881d549a100, ffff8881d549c100) The buggy address belongs to the page: page:ffffea0007552600 refcount:1 mapcount:0 mapping:ffff8881dac02400 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000200 ffff8881dac02400 raw: 0000000000000000 0000000000030003 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d549a000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881d549a080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881d549a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881d549a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d549a200: fb fb fb fb fb fb 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