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| author | Denis Efremov <efremov@linux.com> | 2020-07-20 19:22:15 +0300 |
|---|---|---|
| committer | Julia Lawall <Julia.Lawall@lip6.fr> | 2020-08-04 22:46:59 +0200 |
| commit | 9c568dbd677bcfc975220d3157c89c48669a23e3 (patch) | |
| tree | 2d77f779028ef791d88f6cf513a4bace98c3b1e5 /scripts/coccinelle | |
| parent | 547ade42ced037db77a82e67d70b55c0eecc49e0 (diff) | |
| download | lwn-9c568dbd677bcfc975220d3157c89c48669a23e3.tar.gz lwn-9c568dbd677bcfc975220d3157c89c48669a23e3.zip | |
coccinelle: api: extend memdup_user rule with vmemdup_user()
Add vmemdup_user() transformations to the memdup_user.cocci rule.
Commit 50fd2f298bef ("new primitive: vmemdup_user()") introduced
vmemdup_user(). The function uses kvmalloc with GPF_USER flag.
Signed-off-by: Denis Efremov <efremov@linux.com>
Diffstat (limited to 'scripts/coccinelle')
| -rw-r--r-- | scripts/coccinelle/api/memdup_user.cocci | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/scripts/coccinelle/api/memdup_user.cocci b/scripts/coccinelle/api/memdup_user.cocci index 0e29d41ecab8..60027e21c5e6 100644 --- a/scripts/coccinelle/api/memdup_user.cocci +++ b/scripts/coccinelle/api/memdup_user.cocci @@ -39,6 +39,28 @@ identifier l1,l2; - ...+> - } +@depends on patch@ +expression from,to,size; +identifier l1,l2; +@@ + +- to = \(kvmalloc\|kvzalloc\)(size,\(GFP_KERNEL\|GFP_USER\)); ++ to = vmemdup_user(from,size); + if ( +- to==NULL ++ IS_ERR(to) + || ...) { + <+... when != goto l1; +- -ENOMEM ++ PTR_ERR(to) + ...+> + } +- if (copy_from_user(to, from, size) != 0) { +- <+... when != goto l2; +- -EFAULT +- ...+> +- } + @r depends on !patch@ expression from,to,size; position p; @@ -52,6 +74,17 @@ statement S1,S2; if (copy_from_user(to, from, size) != 0) S2 +@rv depends on !patch@ +expression from,to,size; +position p; +statement S1,S2; +@@ + +* to = \(kvmalloc@p\|kvzalloc@p\)(size,\(GFP_KERNEL\|GFP_USER\)); + if (to==NULL || ...) S1 + if (copy_from_user(to, from, size) != 0) + S2 + @script:python depends on org@ p << r.p; @@ @@ -63,3 +96,15 @@ p << r.p; @@ coccilib.report.print_report(p[0], "WARNING opportunity for memdup_user") + +@script:python depends on org@ +p << rv.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING opportunity for vmemdup_user") + +@script:python depends on report@ +p << rv.p; +@@ + +coccilib.report.print_report(p[0], "WARNING opportunity for vmemdup_user") |