Date: Fri, 10 Sep 2010 21:53:47 +0000 (UTC) From: Matthew D Fleming <mdf@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/share/man/man9 memguard.9 src/sys/kern kern_malloc.c src/sys/vm memguard.c memguard.h vm_extern.h vm_kern.c Message-ID: <201009102154.o8ALsfqZ047290@repoman.freebsd.org>
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mdf 2010-09-10 21:53:47 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_7)
share/man/man9 memguard.9
sys/kern kern_malloc.c
sys/vm memguard.c memguard.h vm_extern.h
vm_kern.c
Log:
SVN rev 212437 on 2010-09-10 21:53:47Z by mdf
MFC r211194, r211229, r212058, r212063: memguard(9) rewrite
r211194:
Rework memguard(9) to reserve significantly more KVA to detect
use-after-free over a longer time. Also release the backing pages of
a guarded allocation at free(9) time to reduce the overhead of using
memguard(9). Allow setting and varying the malloc type at run-time.
Add knobs to allow:
- randomly guarding memory
- adding un-backed KVA guard pages to detect underflow and overflow
- a lower limit on the size of allocations that are guarded
r211229:
Fix compile. It seemed better to have memguard.c include opt_vm.h in
case future compile-time knobs were added that it wants to use.
Also add include guards and forward declarations to vm/memguard.h.
r212058:
The realloc case for memguard(9) will copy too many bytes when
reallocating to a smaller-sized allocation. Fix this issue.
r212063:
Have memguard(9) crash with an easier-to-debug message on double-free.
Revision Changes Path
1.5.2.1 +87 -31 src/share/man/man9/memguard.9
1.162.2.6 +17 -21 src/sys/kern/kern_malloc.c
1.6.2.2 +327 -264 src/sys/vm/memguard.c
1.3.2.1 +26 -5 src/sys/vm/memguard.h
1.78.2.5 +1 -0 src/sys/vm/vm_extern.h
1.128.2.5 +27 -8 src/sys/vm/vm_kern.c
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