Messages in this thread |  | | | Date | Fri, 04 Apr 2008 15:44:14 +0200 | | From | Vegard Nossum <> | | Subject | [ANNOUNCE] kmemcheck v7 |
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Hi,
I skipped the public announcements for versions 5 and 6, but here is 7 :)
General description: kmemcheck is a patch to the linux kernel that detects use of uninitialized memory. It does this by trapping every read and write to memory that was allocated dynamically (e.g. using kmalloc()). If a memory address is read that has not previously been written to, a message is printed to the kernel log.
Changes since v4 (rough list): - SLUB parts were broken-out into its own file to avoid cluttering the main SLUB code. - A rather lot of cleanups, including removing #ifdefs from arch code. - Some preparation in anticipation of an x86_64 port. - Make reporting safer by using a periodic timer to inspect the error queue. - Fix hang due to page flags changing too early on free(). - Fix hang due to kprobes incompatibility. - Allow CONFIG_SMP, but limit number of CPUs to 1 at run-time. - Add kmemcheck=0|1 boot option. - Add /proc/sys/kernel/kmemcheck for run-time enabling/disabling.
These patches apply to Linus's v2.6.25-rc8. The latest patchset can also be found here: http://folk.uio.no/vegardno/linux/kmemcheck/
(I will try to submit this for inclusion in 2.6.26, and testing and feedback is of course very welcome!)
I would like to thank the following people, who provided patches or helped in various ways:
Ingo Molnar Paul McKenney Pekka Enberg Pekka Paalanen Peter Zijlstra Randy Dunlap
Kind regards, Vegard Nossum
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