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===================================================== BUG: KMSAN: use-after-free in _copy_to_user+0x16b/0x1f0 lib/usercopy.c:32 CPU: 0 PID: 9650 Comm: syz-executor.0 Not tainted 5.3.0-rc7+ #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+0x17d/0x2f0 mm/kmsan/kmsan_report.c:114 kmsan_internal_check_memory+0x187/0x4c0 mm/kmsan/kmsan.c:445 kmsan_copy_to_user+0xa9/0xb0 mm/kmsan/kmsan_hooks.c:268 _copy_to_user+0x16b/0x1f0 lib/usercopy.c:32 hidraw_ioctl+0x7f5/0x11a0 include/linux/uaccess.h:174 do_vfs_ioctl+0xea8/0x2c50 fs/ioctl.c:46 ksys_ioctl fs/ioctl.c:713 [inline] __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl+0x1da/0x270 fs/ioctl.c:718 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:718 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x459a59 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:00007f308f173c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a59 RDX: 00000000200000c0 RSI: 0000000080084803 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f308f1746d4 R13: 00000000004c242f R14: 00000000004d5d78 R15: 00000000ffffffff Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:154 [inline] kmsan_internal_chain_origin+0xde/0x190 mm/kmsan/kmsan.c:325 __msan_chain_origin+0x6b/0xe0 mm/kmsan/kmsan_instr.c:184 hidraw_ioctl+0x650/0x11a0 drivers/hid/hidraw.c:404 do_vfs_ioctl+0xea8/0x2c50 fs/ioctl.c:46 ksys_ioctl fs/ioctl.c:713 [inline] __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl+0x1da/0x270 fs/ioctl.c:718 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:718 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:154 [inline] kmsan_internal_poison_shadow+0x60/0x120 mm/kmsan/kmsan.c:137 kmsan_slab_free+0x8d/0x100 mm/kmsan/kmsan_hooks.c:123 slab_free_freelist_hook mm/slub.c:1472 [inline] slab_free mm/slub.c:3038 [inline] kfree+0x4c1/0x2db0 mm/slub.c:3980 hid_device_release+0x78/0x90 drivers/hid/hid-core.c:662 device_release+0xe2/0x380 drivers/base/core.c:1060 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:2264 hid_destroy_device+0x18c/0x200 drivers/hid/hid-core.c:2433 usbhid_disconnect+0x11d/0x1d0 drivers/hid/usbhid/hid-core.c:1413 usb_unbind_interface+0x3a2/0xdd0 drivers/usb/core/driver.c:423 __device_release_driver drivers/base/dd.c:1120 [inline] device_release_driver_internal+0x911/0xd20 drivers/base/dd.c:1151 device_release_driver+0x4b/0x60 drivers/base/dd.c:1174 bus_remove_device+0x4bf/0x670 drivers/base/bus.c:556 device_del+0xcd5/0x1d10 drivers/base/core.c:2339 usb_disable_device+0x567/0x1150 drivers/usb/core/message.c:1241 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 Bytes 0-1 of 8 are uninitialized Memory access of size 8 starts at ffff8881a7e9fd20 =====================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2019/10/08 13:53 | https://github.com/google/kmsan.git master | cebb918b7474 | 137e37ca | .config | console log | report | ci-upstream-kmsan-gce |