Messages in this thread | | | Subject | Re: 4.17.0-rc3+ BUG kmalloc-2048: Poison overwritten (USB hub disconnect) | From | Mathias Nyman <> | Date | Tue, 26 Jun 2018 12:50:10 +0300 |
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Hi
On 26.06.2018 11:20, Vegard Nossum wrote: > Hi, > > I've been seeing variants of this when I plug/unplug my ThinkPad T460 > from the docking station: > > usb 2-4: USB disconnect, device number 30 > usb 2-4.1: USB disconnect, device number 31 > thinkpad_acpi: undocked from hotplug port replicator > thinkpad_acpi: EC reports that Thermal Table has changed > usb 1-4: USB disconnect, device number 61 > usb 1-4.1: USB disconnect, device number 63 > usb 1-4.4: USB disconnect, device number 62 > ============================================================================= > BUG kmalloc-2048 (Tainted: G B ): Poison overwritten > ----------------------------------------------------------------------------- > > INFO: 0x00000000f262b063-0x00000000ccb4f11c. First byte 0x0 instead of 0x6b > INFO: Allocated in usb_alloc_dev+0x35/0x329 age=6894431 cpu=0 pid=27384 > __slab_alloc+0x20/0x40 > kmem_cache_alloc_trace+0x1ee/0x230 > usb_alloc_dev+0x35/0x329 > hub_event+0xba8/0x15c0 > process_one_work+0x148/0x3d0 > worker_thread+0x4b/0x460 > kthread+0x102/0x140 > ret_from_fork+0x35/0x40 > INFO: Freed in usb_release_dev+0x60/0x70 age=0 cpu=0 pid=32750 > kfree+0x176/0x1a0 > usb_release_dev+0x60/0x70 > device_release+0x32/0x90 > kobject_put+0x82/0x190 > put_device+0x17/0x20 > usb_disconnect+0x1b2/0x290 > usb_disconnect+0x1f3/0x290 > hub_event+0x94f/0x15c0 > process_one_work+0x148/0x3d0 > worker_thread+0x4b/0x460 > kthread+0x102/0x140 > ret_from_fork+0x35/0x40 > INFO: Slab 0x00000000f6509278 objects=13 used=13 fp=0x (null) > flags=0x17fffc000008100 > INFO: Object 0x00000000a7692b6c @offset=4776 fp=0x0000000078ed8ddc > > I don't have the source/config for this kernel anymore, sorry. Will > probably try a newer kernel at some point to see if it's still > present, it might already be fixed. I just wanted to send a report > just in case it has enough info for somebody to spot what went wrong > without too much effort. > > See attachment for fuller log + timestamps. The tainted bits are from > earlier reports of the same type. > >
Does patch 2278446 xhci: Fix USB3 NULL pointer dereference at logical disconnect. help?
It should be in 4.17-rc6
-Mathias
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