===================================================== BUG: KMSAN: use-after-free in __write_once_size include/linux/compiler.h:235 [inline] BUG: KMSAN: use-after-free in pm_runtime_mark_last_busy include/linux/pm_runtime.h:107 [inline] BUG: KMSAN: use-after-free in usb_mark_last_busy include/linux/usb.h:773 [inline] BUG: KMSAN: use-after-free in usb_autopm_put_interface+0xf2/0x120 drivers/usb/core/driver.c:1632 CPU: 1 PID: 10276 Comm: syz-executor.1 Not tainted 5.4.0-rc3+ #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+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x14a/0x2f0 mm/kmsan/kmsan_report.c:110 __msan_warning+0x73/0xf0 mm/kmsan/kmsan_instr.c:245 __write_once_size include/linux/compiler.h:235 [inline] pm_runtime_mark_last_busy include/linux/pm_runtime.h:107 [inline] usb_mark_last_busy include/linux/usb.h:773 [inline] usb_autopm_put_interface+0xf2/0x120 drivers/usb/core/driver.c:1632 usblp_release+0x182/0x3d0 drivers/usb/class/usblp.c:467 __fput+0x4c9/0xba0 fs/file_table.c:280 ____fput+0x37/0x40 fs/file_table.c:313 task_work_run+0x22e/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:163 [inline] prepare_exit_to_usermode+0x39d/0x4d0 arch/x86/entry/common.c:194 syscall_return_slowpath+0x90/0x610 arch/x86/entry/common.c:274 do_syscall_64+0xdc/0x160 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x413a91 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:0000000000a6fbf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000413a91 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000001 R08: ffffffff81620c74 R09: 00000000b1f2c129 R10: 0000000000a6fcd0 R11: 0000000000000293 R12: 000000000075bf20 R13: 000000000016a90c R14: 0000000000760de0 R15: 000000000075bf2c Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline] kmsan_internal_poison_shadow+0x60/0x110 mm/kmsan/kmsan.c:134 kmsan_slab_free+0x8d/0x100 mm/kmsan/kmsan_hooks.c:108 slab_free_freelist_hook mm/slub.c:1473 [inline] slab_free mm/slub.c:3040 [inline] kfree+0x4c1/0x2e70 mm/slub.c:3990 usb_release_interface+0x105/0x120 drivers/usb/core/message.c:1633 device_release+0xe2/0x380 drivers/base/core.c:1096 kobject_cleanup lib/kobject.c:693 [inline] kobject_release lib/kobject.c:722 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x38d/0x480 lib/kobject.c:739 put_device+0x51/0x70 drivers/base/core.c:2300 usb_disable_device+0x69a/0x1150 drivers/usb/core/message.c:1248 usb_disconnect+0x51e/0xd60 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+0x3fd0/0x72f0 drivers/usb/core/hub.c:5441 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 =====================================================