fs: 9p/conv.c error path fix
When buf_check_overflow() returns != 0 we will hit kfree(ERR_PTR(err)) and it will not be happy about it. Signed-off-by: NMariusz Kozlowski <m.kozlowski@tuxland.pl> Cc: Latchesar Ionkov <lucho@ionkov.net> Cc: Eric Van Hensbergen <ericvh@ericvh.myip.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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