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netfilter: nf_log: fix uninit read in nf_log_proc_dostring
authorJann Horn <jannh@google.com>
Wed, 20 Jun 2018 16:33:45 +0000 (18:33 +0200)
committerPablo Neira Ayuso <pablo@netfilter.org>
Tue, 26 Jun 2018 14:48:23 +0000 (16:48 +0200)
commite76ef5e5820882a7131e8f9853d065c45a482f97
tree527ee8d7048c5e0df7398273a7bac5cac5bda6c5tree | snapshot
parentee55659ed3deb31b5322dd441331da1f18e23b42commit | diff
netfilter: nf_log: fix uninit read in nf_log_proc_dostring

When proc_dostring() is called with a non-zero offset in strict mode, it
doesn't just write to the ->data buffer, it also reads. Make sure it
doesn't read uninitialized data.

Fixes: 77a689490b10 ("netfilter: nf_log: fix error on write NONE to [...]")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
net/netfilter/nf_log.c diff | blob | history
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