lib/test_kmod.c: fix rmmod double free
commit 5618cf031fecda63847cafd1091e7b8bd626cdb1 upstream. We free the misc device string twice on rmmod; fix this. Without this we cannot remove the module without crashing. Link: http://lkml.kernel.org/r/20181124050500.5257-1-mcgrof@kernel.orgSigned-off-by: NLuis Chamberlain <mcgrof@kernel.org> Reported-by: NRandy Dunlap <rdunlap@infradead.org> Reviewed-by: NAndrew Morton <akpm@linux-foundation.org> Cc: <stable@vger.kernel.org> [4.12+] Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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