[tor-bugs] #25313 [Core Tor/Tor]: Sandbox: Caught a bad syscall attempt (syscall poll)

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#25313: Sandbox: Caught a bad syscall attempt (syscall poll)
------------------------------+--------------------
     Reporter:  cypherpunks   |      Owner:  (none)
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
------------------------------+--------------------
 {{{
  (Sandbox) Caught a bad syscall attempt (syscall poll)
  /usr/bin/tor(+0x1a5baa)[0x560fee34ebaa]
  /lib/x86_64-linux-gnu/libc.so.6(__poll+0x10)[0x7fd66246c690]
  /lib/x86_64-linux-gnu/libc.so.6(__poll+0x10)[0x7fd66246c690]
  /lib/x86_64-linux-gnu/libc.so.6(+0x11b573)[0x7fd6624a8573]
  /lib/x86_64-linux-gnu/libc.so.6(+0x11c189)[0x7fd6624a9189]
  /lib/x86_64-linux-gnu/libc.so.6(+0x1187f2)[0x7fd6624a57f2]
  /lib/x86_64-linux-gnu/libc.so.6(+0x118a3e)[0x7fd6624a5a3e]
  /lib/x86_64-linux-gnu/libc.so.6(getpwnam_r+0x1cd)[0x7fd6624443ed]
  /lib/x86_64-linux-gnu/libc.so.6(getpwnam+0x90)[0x7fd662443d20]
  /usr/bin/tor(tor_getpwnam+0x29)[0x560fee3369e9]
  /usr/bin/tor(check_private_dir+0x9f)[0x560fee3480bf]
  /usr/bin/tor(create_keys_directory+0x34)[0x560fee29b924]
  /usr/bin/tor(init_keys+0x89)[0x560fee2439d9]
  /usr/bin/tor(do_main_loop+0x54)[0x560fee1fd5b4]
  /usr/bin/tor(tor_run_main+0x275)[0x560fee1fef25]
  /usr/bin/tor(tor_main+0x3a)[0x560fee1f836a]
  /usr/bin/tor(main+0x19)[0x560fee1f80d9]
  /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1)[0x7fd6623ad2b1]
  /usr/bin/tor(_start+0x2a)[0x560fee1f812a]

 }}}

 config
 {{{
 OfflineMasterKey 1
 RunAsDaemon 0
 Log notice syslog
 OutboundBindAddress xxxxxx
 SocksPort 0
 User xxxx
 DataDirectory xxxxx
 ORPort xxxxxxx
 ORPort xxxxxxxxx
 OutboundBindAddress xxxxxxx
 DirPort xxxxxxxxx
 ControlSocket 0
 CookieAuthentication 0
 Sandbox 1
 ExitRelay 0
 ExitPolicy reject *:*
 }}}

 os: debian 9 on KVM

 reproducible with:

 0.3.2.9-1~d90.stretch+1
 0.3.3.2-alpha-1~d90.stretch+1
 0.3.4.0-alpha-dev-20180220T150525Z-1~d90.stretch+1

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25313>
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