Coccinelle: limit memdup_user transformation to GFP_KERNEL case
Memdup_user encapsulates a memory allocation with the flag GFP_KERNEL, so only allow this flag in the original code. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Michal Marek <mmarek@suse.com>
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1 changed files with 4 additions and 4 deletions
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@ -15,11 +15,11 @@ virtual org
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virtual report
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@depends on patch@
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expression from,to,size,flag;
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expression from,to,size;
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identifier l1,l2;
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@@
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- to = \(kmalloc\|kzalloc\)(size,flag);
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- to = \(kmalloc\|kzalloc\)(size,GFP_KERNEL);
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+ to = memdup_user(from,size);
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if (
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- to==NULL
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@ -37,12 +37,12 @@ identifier l1,l2;
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- }
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@r depends on !patch@
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expression from,to,size,flag;
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expression from,to,size;
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position p;
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statement S1,S2;
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@@
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* to = \(kmalloc@p\|kzalloc@p\)(size,flag);
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* to = \(kmalloc@p\|kzalloc@p\)(size,GFP_KERNEL);
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if (to==NULL || ...) S1
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if (copy_from_user(to, from, size) != 0)
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S2
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