netfilter: nf_log: don't hold nf_log_mutex during user access
The old code would indefinitely block other users of nf_log_mutex if a userspace access in proc_dostring() blocked e.g. due to a userfaultfd region. Fix it by moving proc_dostring() out of the locked region. This is a followup to commit 266d07cb ("netfilter: nf_log: fix sleeping function called from invalid context"), which changed this code from using rcu_read_lock() to taking nf_log_mutex. Fixes: 266d07cb ("netfilter: nf_log: fix sleeping function calle[...]") Signed-off-by:Jann Horn <jannh@google.com> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org>
parent
dffd22ae
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