Error in `trinity': free(): invalid next size (normal): 0x08683438 ***

After a rather longer time w/o any issue I saw today this at a 32 bit Gentoox86 Linux KVM guest w/ v1.4-611-g01c61fc :

...
[child1:18922] <timed out>
[child1:18933] <timed out>
*** Error in `trinity': free(): invalid next size (normal): 0x08683438 *** ======= Backtrace: ========= /lib/libc.so.6(+0x734ef)[0xb76064ef] /lib/libc.so.6(+0x79992)[0xb760c992] /lib/libc.so.6(+0x7aac1)[0xb760dac1] trinity(output_syscall_prefix+0x1b5)[0x8054465] trinity(child_random_syscalls+0x1ce)[0x805f52e] trinity(child_process+0x7e)[0x8054f8e] trinity(main_loop+0x1f9)[0x8059469] trinity(main+0x254)[0x8053b94] /lib/libc.so.6(__libc_start_main+0xf5)[0xb75afee5] trinity[0x8054135]
======= Memory map: ========

08048000-0807a000 r-xp 00000000 fe:04 156960     /usr/bin/trinity
0807a000-0807b000 r--p 00031000 fe:04 156960     /usr/bin/trinity
0807b000-080e4000 rw-p 00032000 fe:04 156960     /usr/bin/trinity
0865e000-0867f000 rw-p 00000000 00:00 0          [heap]
0867f000-086a0000 rw-p 00000000 00:00 0          [heap]
b41c4000-b41e0000 r-xp 00000000 fe:04 270617     /usr/lib/gcc/i686-pc-linux-gnu/4.7.3/libgcc_s.so.1
b41e0000-b41e1000 r--p 0001b000 fe:04 270617     /usr/lib/gcc/i686-pc-linux-gnu/4.7.3/libgcc_s.so.1
b41e1000-b41e2000 rw-p 0001c000 fe:04 270617     /usr/lib/gcc/i686-pc-linux-gnu/4.7.3/libgcc_s.so.1
b41e9000-b4be9000 -w-s 00000000 00:04 75464      /dev/zero (deleted)
b4be9000-b55e9000 r--s 00000000 00:04 75463      /dev/zero (deleted)
b55e9000-b5fe9000 rw-s 00000000 00:04 75462      /dev/zero (deleted)
b5fe9000-b63e9000 -w-s 00000000 00:04 75461      /dev/zero (deleted)
b63e9000-b67e9000 r--s 00000000 00:04 75460      /dev/zero (deleted)
b67e9000-b6be9000 rw-s 00000000 00:04 75459      /dev/zero (deleted)
b6be9000-b6de9000 -w-s 00000000 00:04 75458      /dev/zero (deleted)
b6de9000-b6fe9000 rw-s 00000000 00:04 75457      /dev/zero (deleted)
b6fe9000-b71e9000 rw-s 00000000 00:04 75456      /dev/zero (deleted)
b71e9000-b72e9000 rw-s 00000000 00:04 75455      /dev/zero (deleted)
b72e9000-b73e9000 r--s 00000000 00:04 75454      /dev/zero (deleted)
b73e9000-b74e9000 rw-s 00000000 00:04 75453      /dev/zero (deleted)
b74e9000-b74eb000 -w-s 00000000 00:04 75452      /dev/zero (deleted)
b74eb000-b74ed000 r--s 00000000 00:04 75451      /dev/zero (deleted)
b74ed000-b750b000 ---s 00000000 00:04 75446      /dev/zero (deleted)
b750b000-b7510000 rw-s 0001e000 00:04 75446      /dev/zero (deleted)
b7510000-b752e000 ---s 00023000 00:04 75446      /dev/zero (deleted)
b752e000-b7592000 rw-s 00000000 00:04 75445      /dev/zero (deleted)
b7592000-b7593000 rw-p 00000000 00:00 0 
b7593000-b7738000 r-xp 00000000 fe:04 267078     /lib/libc-2.19.so
b7738000-b7739000 ---p 001a5000 fe:04 267078     /lib/libc-2.19.so
b7739000-b773b000 r--p 001a5000 fe:04 267078     /lib/libc-2.19.so
b773b000-b773c000 rw-p 001a7000 fe:04 267078     /lib/libc-2.19.so

b773c000-b773f000 rw-p 00000000 00:00 0
b773f000-b7740000 rw-p 00000000 00:00 0
b7740000-b7741000 rw-s 00000000 00:04 75450 /dev/zero (deleted)
b7741000-b7742000 rw-p 00000000 00:00 0
b7742000-b7743000 rw-s 00000000 00:04 75449 /dev/zero (deleted)
b7743000-b7744000 rw-s 00000000 00:04 75448 /dev/zero (deleted)
b7744000-b7746000 rw-p 00000000 00:00 0

b7746000-b7748000 r--p 00000000 00:00 0          [vvar]
b7748000-b774a000 r-xp 00000000 00:00 0          [vdso]
b774a000-b776a000 r-xp 00000000 fe:04 267077     /lib/ld-2.19.so
b776a000-b776b000 rw-p 00000000 00:00 0
b776b000-b776c000 r--p 0001f000 fe:04 267077     /lib/ld-2.19.so
b776c000-b776d000 rw-p 00020000 fe:04 267077     /lib/ld-2.19.so
bf92e000-bf94f000 rw-p 00000000 00:00 0          [stack]

[child0:18948] <timed out>
[child0:18948] <timed out>
[child0:18959] <timed out>

Toralf
pgp key: 0076 E94E

No idea what happened here tbh. My best guess is one of the prior syscalls stomped on something. I've got some work in progress to fix some of this stuff up, which I'll land over the next couple weeks.

Dave