Okay so piecing everything together...
#5 0xb7c275b6 in free () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#6 0xb7862e25 in free_block (bufmgr_fake=0x93730f0, block=0xcc956c8)
at ../../../libdrm/intel/intel_bufmgr_fake.c:473
bo_fake = (drm_intel_bo_fake *) 0x937cac0
static void free_block(drm_intel_bufmgr_fake *bufmgr_fake, struct block *block)
{
...
mmFreeMem(block->mem);
free(block); /* <-- boom */
}
}
*** glibc detected *** /usr/bin/X: double free or corruption (out):
0x0d73de98 ***
Sounds like a double free. Could 2 sessions cause 2 frees? Or is it
something else. Probably needs additional debug statements to track the
frees. Maybe upstream can provide better insights when they respond.
--
Switching to another user and then to anything else causes freeze in
drm_intel_bo_unreference ()
https://bugs.launchpad.net/bugs/348428
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