Messages in this thread | | | From | Krzysztof Kozlowski <> | Date | Wed, 21 Apr 2021 16:19:03 +0200 | Subject | Re: [PATCH] net/rds: Avoid potential use after free in rds_send_remove_from_sock |
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On Tue, 20 Apr 2021 at 11:13, Leon Romanovsky <leon@kernel.org> wrote: > > On Tue, Apr 20, 2021 at 12:09:06PM +0300, Leon Romanovsky wrote: > > On Tue, Apr 06, 2021 at 07:09:12PM -0500, Aditya Pakki wrote: > > > In case of rs failure in rds_send_remove_from_sock(), the 'rm' resource > > > is freed and later under spinlock, causing potential use-after-free. > > > Set the free pointer to NULL to avoid undefined behavior. > > > > > > Signed-off-by: Aditya Pakki <pakki001@umn.edu> > > > --- > > > net/rds/message.c | 1 + > > > net/rds/send.c | 2 +- > > > 2 files changed, 2 insertions(+), 1 deletion(-) > > > > Dave, Jakub > > > > Please revert this patch, given responses from Eric and Al together > > with this response from Greg here https://lore.kernel.org/lkml/YH5/i7OvsjSmqADv@kroah.com > > https://lore.kernel.org/lkml/YH5%2Fi7OvsjSmqADv@kroah.com/ > > > > > BTW, I looked on the rds code too and agree with Eric, this patch > > is a total garbage.
When reverting, consider giving credits to Kees/Coverity as he pointed out after testing linux-next that this is bogus: https://lore.kernel.org/linux-next/202104081640.1A09A99900@keescook/
Best regards, Krzysztof
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