Segafult while running make(1) from /lib/init/rc with -j

[Alejandro Colomar (man-pages)]

Hi,

I wrote some script to use make(1) to run rc scripts in parallel.
When running make(1) without -j, it works fine.  However, when I run it 
in parallel (-j2, for the simplest thing), I run into a segfault (when 
I'm lucky and the system doesn't simply black out forever).

I expected this kind of issues, and maybe make(1) has some assumptions 
that some resources are available which aren't at the time of running rc 
init scripts, and if it's that I'll assume my fault and stop trying to 
use make(1).

However, in case this is some obscure bug in make(1) (or glibc, as the 
report also mentions), I'll report it to you.  I could try to write a 
simpler Makefile that runs let's say a few sleep(1)s at the beginning of 
the rc scripts, and see if that still reproduces the segfault, but for 
the moment, I'll share what I see with the real Makefile, in case it's 
useful to you:


[    2.145704] make[169]: segfault at 7ffed5438f80 ip 00007f00f48227d7 
sp 00007ffed5438f80 error 6 in libc-2.33.so[7f00f47de000+148000]
[    2.146108] Code: df ff ff e8 7b 17 0a 00 ba 01 00 00 00 e9 82 f3 ff 
ff 90 41 57 49 89 d7 41 56 41 55 41 54 55 48 89 fd 53 48 81 ec 18 05 00 
00 <48> 89 34 24 89 4c 24 48 64 48 8b 04 25 28 00 00 00 48 89 84 24 08
make: *** [Makefile:66: S] Segmentation fault


Does it make any sense?

Thanks,

Alex

--
Alejandro Colomar
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
http://www.alejandro-colomar.es/