[squid-users] negotiate_wrapper_auth double free or corruption

[Alex Rousskov]

On 4/10/19 9:54 AM, spokke wrote:
> sometime on the cache log appear a really ugly crash message:
> ** Error in `(negotiate_wrapper_auth)': double free or corruption (!prev):
> 0x00000000021c8980 ***
> ======= Backtrace: =========
> /lib64/libc.so.6(+0x81489)[0x7fec93d8e489]
> (negotiate_wrapper_auth)[0x401bb1]
> (negotiate_wrapper_auth)[0x4016a6]
> /lib64/libc.so.6(__libc_start_main+0xf5)[0x7fec93d2f3d5]
> (negotiate_wrapper_auth)[0x40170b]


> seems that the wrapper crash but i dont undestand why...

AFAICT, the wrapper is buggy[1]. However, this is not my area of
expertise, you may be suffering from other wrapper bugs, and/or problems
other than wrapper bugs may be causing the symptoms you are reporting.


> i've tried to reduce
> or increase the number of childrens/startup/idle processes but the errors
> always appear....someone can help me to undestand this issue??

The issue here is memory corruption, most likely due to a bug in some
software. See above for more details.

Alex.
[1] https://bugs.squid-cache.org/show_bug.cgi?id=4936