034174598b
Use kmemdup_user rather than duplicating its implementation This is a little bit restricted to reduce false positives Signed-off-by: Nicolas Palix <npalix@diku.dk> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Michal Marek <mmarek@suse.cz>
36 lines
799 B
Plaintext
36 lines
799 B
Plaintext
/// Use kmemdup_user rather than duplicating its implementation
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/// This is a little bit restricted to reduce false positives
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///
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// Confidence: High
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// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
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// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
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// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
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// URL: http://coccinelle.lip6.fr/
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// Comments:
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// Options: -no_includes -include_headers
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virtual patch
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@@
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expression from,to,size,flag;
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position p;
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identifier l1,l2;
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@@
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- to = \(kmalloc@p\|kzalloc@p\)(size,flag);
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+ to = memdup_user(from,size);
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if (
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- to==NULL
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+ IS_ERR(to)
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|| ...) {
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<+... when != goto l1;
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- -ENOMEM
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+ PTR_ERR(to)
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...+>
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}
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- if (copy_from_user(to, from, size) != 0) {
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- <+... when != goto l2;
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- -EFAULT
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- ...+>
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- }
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