cvs commit: src/sys/kern kern_malloc.c src/share/man/man9 Makefile redzone.9 src/sys/vm redzone.c redzone.h src/sys/conf NOTES files options

[Pawel Jakub Dawidek]

On Tue, Jan 31, 2006 at 11:09:22AM +0000, Pawel Jakub Dawidek wrote:
+> pjd         2006-01-31 11:09:22 UTC
+> 
+>   FreeBSD src repository
+> 
+>   Modified files:
+>     sys/kern             kern_malloc.c 
+>     share/man/man9       Makefile 
+>     sys/conf             NOTES files options 
+>   Added files:
+>     share/man/man9       redzone.9 
+>     sys/vm               redzone.c redzone.h 
+>   Log:
+>   Add buffer corruption protection (RedZone) for kernel's malloc(9).
+>   It detects both: buffer underflows and buffer overflows bugs at runtime
+>   (on free(9) and realloc(9)) and prints backtraces from where memory was
+>   allocated and from where it was freed.
+>   
+>   Tested by:      kris

As I noted above, Kris did some tests with redzone(9) enabled and haven't
found any issues.

We may want to turn it on in HEAD by default for some time, so more code
can be tested.

What do you think? Kris, is there visible overhead with redzone(9)?

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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