Public bug reported:
Imagemagick signal handlers, if compiled with pthread support, may enter
recursive mutex locks.
This may lead to deadlock in single-threaded programs such as 'convert'.
Generally, either error checking mutexes have to be used (and crash
horribly), or signal handlers simplified, or at least stand-alone tools
compiled without pthread.
(gdb) bt
#0 0x00002aabb7776bd8 in __lll_mutex_lock_wait () from /lib/libpthread.so.0
#1 0x00002aabb7772ac8 in _L_mutex_lock_106 () from /lib/libpthread.so.0
#2 0x00002aabb7772423 in pthread_mutex_lock () from /lib/libpthread.so.0
#3 0x00002aabb5447cc5 in AcquireSemaphoreInfo () from /usr/lib/libMagick.so.9
#4 0x00002aabb544f185 in GetNextKeyInSplayTree () from /usr/lib/libMagick.so.9
#5 0x00002aabb5444141 in AsynchronousDestroyMagickResources () from
/usr/lib/libMagick.so.9
#6 0x00002aabb54032e4 in ?? () from /usr/lib/libMagick.so.9
#7 <signal handler called>
#8 0x00002aabb7776bd8 in __lll_mutex_lock_wait () from /lib/libpthread.so.0
#9 0x00002aabb7772ac8 in _L_mutex_lock_106 () from /lib/libpthread.so.0
#10 0x00002aabb7772423 in pthread_mutex_lock () from /lib/libpthread.so.0
#11 0x00002aabb5447cc5 in AcquireSemaphoreInfo () from /usr/lib/libMagick.so.9
#12 0x00002aabb53ff111 in GetLocaleInfo_ () from /usr/lib/libMagick.so.9
#13 0x00002aabb53ff451 in GetLocaleMessage () from /usr/lib/libMagick.so.9
#14 0x00002aabb53db52d in GetLocaleExceptionMessage () from
/usr/lib/libMagick.so.9
#15 0x00002aabb53db91d in ThrowMagickExceptionList () from
/usr/lib/libMagick.so.9
#16 0x00002aabb53dbaba in ThrowMagickException () from /usr/lib/libMagick.so.9
#17 0x00002aabb5447c86 in AllocateSemaphoreInfo () from /usr/lib/libMagick.so.9
#18 0x00002aabb5447ce5 in AcquireSemaphoreInfo () from /usr/lib/libMagick.so.9
#19 0x00002aabb53ff111 in GetLocaleInfo_ () from /usr/lib/libMagick.so.9
#20 0x00002aabb53ff451 in GetLocaleMessage () from /usr/lib/libMagick.so.9
#21 0x00002aabb53db52d in GetLocaleExceptionMessage () from
/usr/lib/libMagick.so.9
#22 0x00002aabb53db91d in ThrowMagickExceptionList () from
/usr/lib/libMagick.so.9
#23 0x00002aabb53dbaba in ThrowMagickException () from /usr/lib/libMagick.so.9
#24 0x00002aabb535e958 in ?? () from /usr/lib/libMagick.so.9
#25 0x00002aabb535f158 in SetCacheNexus () from /usr/lib/libMagick.so.9
#26 0x00002aabb535f464 in GetCacheNexus () from /usr/lib/libMagick.so.9
#27 0x00002aabb536f42d in CompositeImage () from /usr/lib/libMagick.so.9
#28 0x00002aabb5456f13 in CoalesceImages () from /usr/lib/libMagick.so.9
#29 0x00002aabb5407460 in MogrifyImageList () from /usr/lib/libMagick.so.9
#30 0x00002aabb540c00b in MogrifyImages () from /usr/lib/libMagick.so.9
#31 0x00002aabb53830f4 in ConvertImageCommand () from /usr/lib/libMagick.so.9
#32 0x0000000000400cc2 in ?? ()
#33 0x00002aabb5b208e4 in __libc_start_main () from /lib/libc.so.6
#34 0x0000000000400b29 in ?? ()
#35 0x00007ffff59e44f8 in ?? ()
#36 0x0000000000000000 in ?? ()
** Affects: imagemagick (Ubuntu)
Importance: Undecided
Status: New
** Changed in: imagemagick (Ubuntu)
Sourcepackagename: None => imagemagick
--
imagemagick tools should be built without threading (or recursive mutexes fixed)
https://bugs.launchpad.net/bugs/164533
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