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authorJulia Lawall <julia@diku.dk>2008-09-24 23:22:22 +0200
committerEric Van Hensbergen <ericvh@ericvh-desktop.austin.ibm.com>2008-09-24 23:22:22 +0200
commit620678244bc7b83287e2e283ed4fe6b959e94b7d (patch)
tree1d79a263ffd1f406cd3b9fb7ff79b126bc2236d6 /fs/quota.c
parent9p-trans_fd: fix and clean up module init/exit paths (diff)
downloadlinux-620678244bc7b83287e2e283ed4fe6b959e94b7d.tar.xz
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9p: introduce missing kfree
Error handling code following a kmalloc should free the allocated data. The semantic match that finds the problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r exists@ local idexpression x; statement S; expression E; identifier f,l; position p1,p2; expression *ptr != NULL; @@ ( if ((x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...)) == NULL) S | x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...); ... if (x == NULL) S ) <... when != x when != if (...) { <+...x...+> } x->f = E ...> ( return \(0\|<+...x...+>\|ptr\); | return@p2 ...; ) @script:python@ p1 << r.p1; p2 << r.p2; @@ print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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