lkml.org 
[lkml]   [2020]   [Jan]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: BUG: KASAN: use-after-free in xhci_trb_virt_to_dma.part.24+0x1c/0x80
Date

Hi,

Mika Westerberg <mika.westerberg@linux.intel.com> writes:

> On Thu, Jan 02, 2020 at 03:10:14PM +0100, Paul Menzel wrote:
>> Mika, as you fixed the other leak, any idea, how to continue from the
>> kmemleak log below?
>>
>> ```
>> unreferenced object 0xffff8c207a1e1408 (size 8):
>> comm "systemd-udevd", pid 183, jiffies 4294667978 (age 752.292s)
>> hex dump (first 8 bytes):
>> 34 01 05 00 00 00 00 00 4.......
>> backtrace:
>> [<00000000aea7b46d>] xhci_mem_init+0xcfa/0xec0 [xhci_hcd]
>
> There are probably better ways for doing this but you can use objdump
> for example:
>
> $ objdump -l --prefix-addresses -j .text --disassemble=xhci_mem_init drivers/usb/host/xhci-hcd.ko
>
> then find the offset xhci_mem_init+0xcfa. It should show you the line
> numbers as well if you have compiled your kernel with debug info. This
> should be close to the line that allocated the memory that was leaked.

addr2line helps here. So does gdb (gdb vmlinux l *(xhci_mem_init+0xcfa))

--
balbi
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2020-01-09 09:53    [W:0.084 / U:11.956 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site