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NFS4: Fix use-after-free in trace_event_raw_event_nfs4_set_lock
authorDave Wysochanski <dwysocha@redhat.com>
Fri, 11 Dec 2020 10:12:51 +0000 (05:12 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 19 Jan 2021 17:27:30 +0000 (18:27 +0100)
commit1b42712e43e5d574a985661e336e48b0f6ba06b6
tree1ee6e35d91670192406d3d974f74ae83e9240143tree | snapshot
parent76600f633bb977eb758a7c9bc710b28f3bde3670commit | diff
NFS4: Fix use-after-free in trace_event_raw_event_nfs4_set_lock

commit 3d1a90ab0ed93362ec8ac85cf291243c87260c21 upstream.

It is only safe to call the tracepoint before rpc_put_task() because
'data' is freed inside nfs4_lock_release (rpc_release).

Fixes: 48c9579a1afe ("Adding stateid information to tracepoints")
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/nfs/nfs4proc.c diff | blob | history