Date: Wed, 11 Aug 2010 22:10:37 +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: <201008112211.o7BMBt94026067@repoman.freebsd.org>
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mdf 2010-08-11 22:10:37 UTC
FreeBSD src repository
Modified files:
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 211194 on 2010-08-11 22:10:37Z by mdf
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
Reviewed by: alc
Reviewed by: brueffer, Ulrich Spörlein <uqs spoerlein net> (man page)
Silence from: -arch
Approved by: zml (mentor)
MFC after: 1 month
Revision Changes Path
1.6 +87 -31 src/share/man/man9/memguard.9
1.175 +21 -18 src/sys/kern/kern_malloc.c
1.9 +288 -256 src/sys/vm/memguard.c
1.5 +16 -5 src/sys/vm/memguard.h
1.95 +1 -0 src/sys/vm/vm_extern.h
1.145 +27 -8 src/sys/vm/vm_kern.c
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