https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253335
Mark Johnston <ma...@freebsd.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|New |Open
Assignee|kev...@freebsd.org |ma...@freebsd.org
--- Comment #7 from Mark Johnston <ma...@freebsd.org> ---
We're crashing on a write to 0xf4215a70. Shortly before, we had mmapped a
region containing that address:
71585 mmap(0,65536,7,4098,-1,0) = 0xf4206000
71585 mprotect(0xf4206000,0x10000,7) = 0
and I can't see any subsequent system calls that would modify that mapping, but
procstat -v shows:
71585 0xf4206000 0xf4215000 rwx 1 2 2 0 ----- df
71585 0xf4215000 0xf4216000 r-x 1 2 2 0 ----- df
so indeed the last page is not writeable. I'm not sure why libpcre is
mprotect()ing a region to set the permissions specified by the preceding mmap()
call.
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