title: addr2line on kernel module
body: <p>I'm trying to debug kernel module. I suspect to have there some memory leaks. To check it I have prepared build with enabled Memory leak debugging for kernel and modules. And I got some warning from that:</p>
  
  <pre><code>[11839.429168] slab error in verify_redzone_free(): cache `size-64': memory outside object was overwritten
  [11839.438659] [&lt;c005575c&gt;] (unwind_backtrace+0x0/0x164) from [&lt;c0116ca0&gt;] (kfree+0x278/0x4d8)
  [11839.447357] [&lt;c0116ca0&gt;] (kfree+0x278/0x4d8) from [&lt;bf083f48&gt;] (some_function+0x18/0x1c [my_module])
  [11839.457214] [&lt;bf083f48&gt;] (some_function+0x18/0x1c [my_module]) from [&lt;bf08762c&gt;] (some_function+0x174/0x718 [my_module])
  [11839.470184] [&lt;bf08762c&gt;] (some_function+0x174/0x718 [my_module]) from [&lt;bf0a56b8&gt;] (some_function+0x12c/0x16c [my_module])
  [11839.483917] [&lt;bf0a56b8&gt;] (some_function+0x12c/0x16c [my_module]) from [&lt;bf085790&gt;] (some_function+0x8/0x10 [my_module])
  [11839.496368] [&lt;bf085790&gt;] (some_function+0x8/0x10 [my_module]) from [&lt;bf07b74c&gt;] (some_function+0x358/0x6d4 [my_module])
  [11839.507476] [&lt;bf07b74c&gt;] (some_function+0x358/0x6d4 [my_module]) from [&lt;c00a60f8&gt;] (worker_thread+0x1e8/0x284)
  [11839.517211] [&lt;c00a60f8&gt;] (worker_thread+0x1e8/0x284) from [&lt;c00a9edc&gt;] (kthread+0x78/0x80)
  [11839.525543] [&lt;c00a9edc&gt;] (kthread+0x78/0x80) from [&lt;c004f8fc&gt;] (kernel_thread_exit+0x0/0x8)
  </code></pre>
  
  <p>There is no problem to translate addresses which points to kernel:</p>
  
  <pre><code>$ addr2line -f -e vmlinux.kmeml c0116ca0
  verify_redzone_free
  /[...]/kernel/mm/slab.c:2922
  </code></pre>
  
  <p>But I can't do that if addresses are from my_module:</p>
  
  <pre><code>$ addr2line -f -e vmlinux.kmeml bf0a56b8
  ??
  ??:0
  </code></pre>
  
  <p>I was also trying with module file:</p>
  
  <pre><code>$ addr2line -f -e my_module.ko bf0a56b8
  ??
  ??:0
  </code></pre>
  
  <p>How can I translate this addresses to files and line numbers?</p>