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Groups > linux.kernel > #1697362
| From | Christopher Lameter <cl@linux.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [v3] mm: Add SLUB free list pointer obfuscation |
| Date | 2017-07-26 19:00 +0200 |
| Message-ID | <u7xPb-2P1-19@gated-at.bofh.it> (permalink) |
| References | <u02Qa-5ct-1@gated-at.bofh.it> <u6SVI-227-15@gated-at.bofh.it> <u7in7-1wt-3@gated-at.bofh.it> <u7vNn-1yO-5@gated-at.bofh.it> <u7xma-2CU-21@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Wed, 26 Jul 2017, Kees Cook wrote: > >> What happens if, instead of BUG_ON, we do: > >> > >> if (unlikely(WARN_RATELIMIT(object == fp, "double-free detected")) > >> return; > > > > This may work for the free fastpath but the set_freepointer function is > > use in multiple other locations. Maybe just add this to the fastpath > > instead of to this fucnction? > > Do you mean do_slab_free()? Yes inserting these lines into do_slab_free() would simple ignore the double free operation in the fast path and that would be safe. Although in either case we are adding code to the fastpath...
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Re: [v3] mm: Add SLUB free list pointer obfuscation Alexander Popov <alex.popov@linux.com> - 2017-07-24 23:20 +0200
Re: [v3] mm: Add SLUB free list pointer obfuscation Alexander Popov <alex.popov@linux.com> - 2017-07-25 11:50 +0200
Re: [v3] mm: Add SLUB free list pointer obfuscation Kees Cook <keescook@chromium.org> - 2017-07-26 02:30 +0200
Re: [v3] mm: Add SLUB free list pointer obfuscation Christopher Lameter <cl@linux.com> - 2017-07-26 16:50 +0200
Re: [v3] mm: Add SLUB free list pointer obfuscation Kees Cook <keescook@chromium.org> - 2017-07-26 18:30 +0200
Re: [v3] mm: Add SLUB free list pointer obfuscation Christopher Lameter <cl@linux.com> - 2017-07-26 19:00 +0200
Re: [v3] mm: Add SLUB free list pointer obfuscation Kees Cook <keescook@chromium.org> - 2017-07-26 19:20 +0200
Re: [v3] mm: Add SLUB free list pointer obfuscation Christopher Lameter <cl@linux.com> - 2017-07-27 17:20 +0200
Re: [v3] mm: Add SLUB free list pointer obfuscation Alexander Popov <alex.popov@linux.com> - 2017-07-28 00:50 +0200
Re: [v3] mm: Add SLUB free list pointer obfuscation Christopher Lameter <cl@linux.com> - 2017-07-28 02:00 +0200
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