[tpm2] Re: tpm2_flushcontext stuck

Han <keepsimple at gmail.com>
Newsgroups dev.linux.lists.tpm2
Message-ID <CAEjGaqdLPaUicAeW-84_C2RRBvkPfXpufsQT_9zCHZf323303g@mail.gmail.com> 
It seems stuck in a call of `poll()` at fd 3, which is /dev/tpmrm0 based on
the log (see below).  The kernel version is 5.10.63.  Yes, I am using
/dev/tpm0 and /dev/tpmrm0.

$ sudo strace tpm2_flushcontext 0x80000000

<snip>

openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=72845, ...}) = 0
mmap2(NULL, 72845, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb6f74000
close(3)                                = 0
openat(AT_FDCWD, "/lib/arm-linux-gnueabihf/libtss2-tcti-device.so.0",
O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\08\n\0\0004\0\0\0"..., 512) =
512
fstat64(3, {st_mode=S_IFREG|0644, st_size=22028, ...}) = 0
mmap2(NULL, 86236, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xb5f22000
mprotect(0xb5f27000, 61440, PROT_NONE)  = 0
mmap2(0xb5f36000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4000) = 0xb5f36000
close(3)                                = 0
mprotect(0xb5f36000, 4096, PROT_READ)   = 0
munmap(0xb6f74000, 72845)               = 0
openat(AT_FDCWD, "/dev/tpmrm0", O_RDWR|O_NONBLOCK) = 3
write(3, "\200\1\0\0\0\f\0\0\1{\0\10", 12) = 12
poll([{fd=3, events=POLLIN}], 1, 1000)  = 1 ([{fd=3, revents=POLLIN}])
read(3, "\200\1\0\0\0\24\0\0\0\0", 10)  = 10
poll([{fd=3, events=POLLIN}], 1, 1000)  = 1 ([{fd=3, revents=POLLIN}])
read(3, "\0\10Z\314k~c`I\346", 10)      = 10
futex(0xb6e7d35c, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0xb6e7d360, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0xb6e7d364, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0xb6e7d380, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0xb6e7ac9c, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0xb6e7d280, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0xb6e7b224, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0xb6e7ad20, FUTEX_WAKE_PRIVATE, 2147483647) = 0
brk(0xda2000)                           = 0xda2000
futex(0xb6e7d368, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0xb6e7d384, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0xb6e7d3f8, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0xb6e7d36c, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0xb6e7d370, FUTEX_WAKE_PRIVATE, 2147483647) = 0
write(3, "\200\1\0\0\0\16\0\0\1s\200\0\0\0", 14) = 14
poll([{fd=3, events=POLLIN}], 1, -1



On Fri, Dec 17, 2021 at 10:29 AM Roberts, William C <
william.c.roberts(a)intel.com> wrote:

> That's weird, could you strace it and see where it's hanging?
>
> What kernel version is that? I'm assuming your using the /dev/tpm0 or
> /dev/tpmrm0 device directly since I see the sudo.
> ------------------------------
> *From:* Han <keepsimple(a)gmail.com>
> *Sent:* Wednesday, December 15, 2021 5:56 PM
> *To:* tpm2(a)lists.01.org <tpm2(a)lists.01.org>
> *Subject:* [tpm2] tpm2_flushcontext stuck
>
> Hi,
>
> I'm using tpm2-tools 5.0 in Debian 11 Bullseye based Raspberry Pi OS.  I'm
> trying to run tpm2_flushcontext but the command got stuck and it's not
> showing anything. Is the data in TPM corrupted?  How can I check?
>
> $ sudo tpm2_flushcontext 0x80000000
> < no output at all and stuck here >
>
> (note: the handle 0x80000000 was obtained from previous command output
> when I was running previous version tpm2-tools 3.1.3 on Debian 10 Buster
> based OS:
>
> $ sudo tpm2_createprimary -H o -g sha256 -G ecc -C context.out
> ObjectAttribute: 0x00030072
>
> CreatePrimary Succeed ! Handle: 0x80000000)
>
>
attachment.htm (text/html, 5.4 KB) 
<div dir="ltr">It seems stuck in a call of `poll()` at fd 3, which is /dev/tpmrm0 based on the log (see below).  The kernel version is 5.10.63.  Yes, I am using /dev/tpm0 and /dev/tpmrm0.  <div><br></div><div>$ sudo strace tpm2_flushcontext 0x80000000</div><div><br></div><div>&lt;snip&gt;</div><div><br></div><div>openat(AT_FDCWD, &quot;/etc/ld.so.cache&quot;, O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 3<br>fstat64(3, {st_mode=S_IFREG|0644, st_size=72845, ...}) = 0<br>mmap2(NULL, 72845, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb6f74000<br>close(3)                                = 0<br>openat(AT_FDCWD, &quot;/lib/arm-linux-gnueabihf/libtss2-tcti-device.so.0&quot;, O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 3<br>read(3, &quot;\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\08\n\0\0004\0\0\0&quot;..., 512) = 512<br>fstat64(3, {st_mode=S_IFREG|0644, st_size=22028, ...}) = 0<br>mmap2(NULL, 86236, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb5f22000<br>mprotect(0xb5f27000, 61440, PROT_NONE)  = 0<br>mmap2(0xb5f36000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x4000) = 0xb5f36000<br>close(3)                                = 0<br>mprotect(0xb5f36000, 4096, PROT_READ)   = 0<br>munmap(0xb6f74000, 72845)               = 0<br>openat(AT_FDCWD, &quot;/dev/tpmrm0&quot;, O_RDWR|O_NONBLOCK) = 3<br>write(3, &quot;\200\1\0\0\0\f\0\0\1{\0\10&quot;, 12) = 12<br>poll([{fd=3, events=POLLIN}], 1, 1000)  = 1 ([{fd=3, revents=POLLIN}])<br>read(3, &quot;\200\1\0\0\0\24\0\0\0\0&quot;, 10)  = 10<br>poll([{fd=3, events=POLLIN}], 1, 1000)  = 1 ([{fd=3, revents=POLLIN}])<br>read(3, &quot;\0\10Z\314k~c`I\346&quot;, 10)      = 10<br>futex(0xb6e7d35c, FUTEX_WAKE_PRIVATE, 2147483647) = 0<br>futex(0xb6e7d360, FUTEX_WAKE_PRIVATE, 2147483647) = 0<br>futex(0xb6e7d364, FUTEX_WAKE_PRIVATE, 2147483647) = 0<br>futex(0xb6e7d380, FUTEX_WAKE_PRIVATE, 2147483647) = 0<br>futex(0xb6e7ac9c, FUTEX_WAKE_PRIVATE, 2147483647) = 0<br>futex(0xb6e7d280, FUTEX_WAKE_PRIVATE, 2147483647) = 0<br>futex(0xb6e7b224, FUTEX_WAKE_PRIVATE, 2147483647) = 0<br>futex(0xb6e7ad20, FUTEX_WAKE_PRIVATE, 2147483647) = 0<br>brk(0xda2000)                           = 0xda2000<br>futex(0xb6e7d368, FUTEX_WAKE_PRIVATE, 2147483647) = 0<br>futex(0xb6e7d384, FUTEX_WAKE_PRIVATE, 2147483647) = 0<br>futex(0xb6e7d3f8, FUTEX_WAKE_PRIVATE, 2147483647) = 0<br>futex(0xb6e7d36c, FUTEX_WAKE_PRIVATE, 2147483647) = 0<br>futex(0xb6e7d370, FUTEX_WAKE_PRIVATE, 2147483647) = 0<br>write(3, &quot;\200\1\0\0\0\16\0\0\1s\200\0\0\0&quot;, 14) = 14<br>poll([{fd=3, events=POLLIN}], 1, -1<br></div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Dec 17, 2021 at 10:29 AM Roberts, William C &lt;<a href="mailto:[email protected]">[email protected]</a>&gt; wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">




<div dir="ltr">
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
That&#39;s weird, could you strace it and see where it&#39;s hanging?</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
What kernel version is that? I&#39;m assuming your using the /dev/tpm0 or /dev/tpmrm0 device directly since I see the sudo.</div>
<div id="gmail-m_-6506513492750421582appendonsend"></div>
<hr style="display:inline-block;width:98%">
<div id="gmail-m_-6506513492750421582divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Han &lt;<a href="mailto:[email protected]" target="_blank">[email protected]</a>&gt;<br>
<b>Sent:</b> Wednesday, December 15, 2021 5:56 PM<br>
<b>To:</b> <a href="mailto:[email protected]" target="_blank">[email protected]</a> &lt;<a href="mailto:[email protected]" target="_blank">[email protected]</a>&gt;<br>
<b>Subject:</b> [tpm2] tpm2_flushcontext stuck</font>
<div> </div>
</div>
<div>
<div dir="ltr">Hi,
<div><br>
</div>
<div>I&#39;m using tpm2-tools 5.0 in Debian 11 Bullseye based Raspberry Pi OS.  I&#39;m trying to run tpm2_flushcontext but the command got stuck and it&#39;s not showing anything. Is the data in TPM corrupted?  How can I check? </div>
<div><br>
</div>
<div>$ sudo tpm2_flushcontext 0x80000000<br>
</div>
<div>&lt; no output at all and stuck here &gt;</div>
<div><br>
</div>
<div>(note: the handle 0x80000000 was obtained from previous command output when I was running previous version tpm2-tools 3.1.3 on Debian 10 Buster based OS: </div>
<div><br>
</div>
<div>
<pre style="box-sizing:border-box;font-family:ui-monospace,SFMono-Regular,&quot;SF Mono&quot;,Menlo,Consolas,&quot;Liberation Mono&quot;,monospace;font-size:11.9px;margin-top:0px;margin-bottom:16px;padding:16px;overflow:auto;line-height:1.45;border-radius:6px;color:rgb(36,41,47)"><code style="box-sizing:border-box;font-family:ui-monospace,SFMono-Regular,&quot;SF Mono&quot;,Menlo,Consolas,&quot;Liberation Mono&quot;,monospace;font-size:11.9px;padding:0px;margin:0px;background:transparent;border-radius:6px;word-break:normal;border:0px;display:inline;overflow:visible;line-height:inherit">$ sudo tpm2_createprimary -H o -g sha256 -G ecc -C context.out
ObjectAttribute: 0x00030072

CreatePrimary Succeed ! Handle: 0x80000000) </code></pre>
</div>
</div>
</div>
</div>

</blockquote></div>
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