ubuntu-x-swat team mailing list archive

[Bryce Harrington <bryce@xxxxxxxxxxxxxxxxxxx>]

Not obvious why the pointers are mismatched in this case and trigger the assert.
This bug report is worth sending upstream.

** Description changed:

  Running "xauth generate" with a large timeout value (e.g., "xauth
  generate :0.0 . trusted timeout 99999999") causes the X server to crash
  with an assertion failure.  Immediately upon running the command, the X
  server crashes, and after a few seconds, the login screen appears.
  
  I have attached a full backtrace.  Xorg.0.log and dmesg don't contain
  any relevant data.
  
  SecurityAuthorizationExpired: Assertion `pAuth->timer == timer' failed.
  
- 
- Program received signal SIGABRT, Aborted.
- 0x0070b422 in __kernel_vsyscall ()
- (gdb) backtrace full
- #0  0x0070b422 in __kernel_vsyscall ()
- No symbol table info available.
- #1  0x003a64d1 in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
-         resultvar = <value optimized out>
-         pid = 4968436
-         selftid = 6161
- #2  0x003a9932 in *__GI_abort () at abort.c:92
-         act = {__sigaction_handler = {sa_handler = 0x4bcff4, sa_sigaction = 0x4bcff4}, sa_mask = {__val = {305, 56,
-               4973472, 4968436, 4973472, 102, 3221022944, 4110285, 166804032, 4968436, 4968436, 103, 3221023144,
-               4045848, 167320064, 167320064, 102, 166804032, 0, 4222451712, 167320064, 167320165, 167320064,
-               167320064, 167320166, 167320364, 167320064, 167320364, 0, 0, 0, 0}}, sa_flags = 0, sa_restorer = 0}
-         sigs = {__val = {32, 0 <repeats 31 times>}}
  #3  0x0039f648 in *__GI___assert_fail (assertion=0x81e1ac0 "pAuth->timer == timer",
-     file=0x81e1aaa "../../Xext/security.c", line=322, function=0x81e1e3a "SecurityAuthorizationExpired") at assert.c:81
-         buf = 0x9f64128 "X: ../../Xext/security.c:322: SecurityAuthorizationExpired: Assertion `pAuth->timer == timer' failed.\n"
+         file=0x81e1aaa "../../Xext/security.c", line=322, function=0x81e1e3a "SecurityAuthorizationExpired") at assert.c:81
+         buf = 0x9f64128 "X: ../../Xext/security.c:322: SecurityAuthorizationExpired: Assertion `pAuth->timer == timer' failed.\n"
  #4  0x0815f5bc in SecurityAuthorizationExpired (timer=0x9ff7018, time=3179634, pval=0x6) at ../../Xext/security.c:322
-         __PRETTY_FUNCTION__ = "SecurityAuthorizationExpired"
+         __PRETTY_FUNCTION__ = "SecurityAuthorizationExpired"
  #5  0x081313c2 in TimerSet (timer=0x9ff7018, flags=<value optimized out>, millis=3179338,
-     func=0x815f520 <SecurityAuthorizationExpired>, arg=0x9ee0c70) at ../../os/WaitFor.c:465
-         prev = <value optimized out>
-         now = 6
+         func=0x815f520 <SecurityAuthorizationExpired>, arg=0x9ee0c70) at ../../os/WaitFor.c:465
+         prev = <value optimized out>
+         now = 6
  #6  0x0815f4f5 in SecurityStartAuthorizationTimer (pAuth=0x9ee0c70) at ../../Xext/security.c:353
- No locals.
  #7  0x0815fa01 in ProcSecurityGenerateAuthorization (client=0x9dfa820) at ../../Xext/security.c:578
-         pAuth = 0x9ee0c70
-         err = <value optimized out>
-         authId = 372
-         rep = {type = 164 '\244', pad0 = 96 '`', sequenceNumber = 2079, length = 3221023496, authId = 0,
-           dataLength = 4, pad1 = 0, pad2 = 165652512, pad3 = 0, pad4 = 165652512, pad5 = 162973096}
-         trustLevel = 0
-         group = 0
-         timeout = 99999999
-         values = <value optimized out>
-         protoname = 0xa002584 "MIT-MAGIC-COOKIE-1"
-         authdata_len = <value optimized out>
-         pAuthdata = <value optimized out>
-         eventMask = 0
- #8  0x0808d17f in Dispatch () at ../../dix/dispatch.c:456
-         result = <value optimized out>
-         client = 0x9dfa820
-         nready = 0
-         start_tick = 2780
- #9  0x08072515 in main (argc=8, argv=0xbffcecb4, envp=0xbffcecd8) at ../../dix/main.c:397
-         i = <value optimized out>
-         alwaysCheckForInput = {0, 1}
- 
+         pAuth = 0x9ee0c70
+         err = <value optimized out>
+         authId = 372
+         rep = {type = 164 '\244', pad0 = 96 '`', sequenceNumber = 2079, length = 3221023496, authId = 0,
+           dataLength = 4, pad1 = 0, pad2 = 165652512, pad3 = 0, pad4 = 165652512, pad5 = 162973096}
+         trustLevel = 0
+         group = 0
+         timeout = 99999999
+         values = <value optimized out>
+         protoname = 0xa002584 "MIT-MAGIC-COOKIE-1"
+         authdata_len = <value optimized out>
+         pAuthdata = <value optimized out>
+         eventMask = 0
  
  lsb_release -rd:
  Description:	Ubuntu 9.10
  Release:	9.10
  
  apt-cache policy xserver-xorg-core:
  xserver-xorg-core:
    Installed: 2:1.6.4-2ubuntu4.1
    Candidate: 2:1.6.4-2ubuntu4.1
    Version table:
   *** 2:1.6.4-2ubuntu4.1 0
          500 http://us.archive.ubuntu.com karmic-updates/main Packages
          500 http://security.ubuntu.com karmic-security/main Packages
          100 /var/lib/dpkg/status
       2:1.6.4-2ubuntu4 0
          500 http://us.archive.ubuntu.com karmic/main Packages

** Changed in: xorg-server (Ubuntu)
   Importance: Medium => High

** Also affects: xorg-server (Ubuntu Lucid)
   Importance: High
       Status: Triaged

-- 
"xauth generate" with large timeout triggers assertion
https://bugs.launchpad.net/bugs/519049
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg-server in ubuntu.