Suggest kvmalloc instead of opencoded kmalloc && vmalloc condition.
Signed-off-by: Denis Efremov <[email protected]>
---
If coccinelle fails with "Segmentation fault" during analysis, then
one needs to increase stack limit, e.g. ulimit -s 32767.
Current, I've sent only one patch for this rule and will send the rest
after the merge window. https://lkml.org/lkml/2020/7/31/986
scripts/coccinelle/api/kvmalloc.cocci | 127 ++++++++++++++++++++++++++
1 file changed, 127 insertions(+)
create mode 100644 scripts/coccinelle/api/kvmalloc.cocci
diff --git a/scripts/coccinelle/api/kvmalloc.cocci b/scripts/coccinelle/api/kvmalloc.cocci
new file mode 100644
index 000000000000..76d6aeab7c09
--- /dev/null
+++ b/scripts/coccinelle/api/kvmalloc.cocci
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0-only
+///
+/// Find conditions in code for kmalloc/vmalloc calls.
+/// Suggest to use kvmalloc instead.
+///
+// Confidence: High
+// Copyright: (C) 2020 Denis Efremov ISPRAS
+// Options: --no-includes --include-headers
+//
+
+virtual patch
+virtual report
+virtual org
+virtual context
+
+@opportunity depends on !patch@
+expression E, E1, size;
+position p;
+@@
+
+(
+* if (\(size <= E1\|size < E1\|size == E1\|size > E1\) || ...)@p {
+ ...
+* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
+* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...)
+ ...
+ } else {
+ ...
+* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
+ ...
+ }
+|
+* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
+* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...)
+ ... when != E = E1
+ when != size = E1
+ when any
+* if (\(!E\|E == NULL\))@p {
+ ...
+* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
+ ...
+ }
+)
+
+@depends on patch@
+expression E, E1, flags, size, node;
+identifier x;
+type T;
+@@
+
+(
+- if (\(size <= E1\|size < E1\|size == E1\|size > E1\))
+- E = kmalloc(size, flags);
+- else
+- E = vmalloc(size);
++ E = kvmalloc(size, flags);
+|
+- E = kmalloc(size, flags | __GFP_NOWARN);
+- if (\(!E\|E == NULL\))
+- E = vmalloc(size);
++ E = kvmalloc(size, flags);
+|
+- T x = kmalloc(size, flags | __GFP_NOWARN);
+- if (\(!x\|x == NULL\))
+- x = vmalloc(size);
++ T x = kvmalloc(size, flags);
+|
+- if (\(size <= E1\|size < E1\|size == E1\|size > E1\))
+- E = kzalloc(size, flags);
+- else
+- E = vzalloc(size);
++ E = kvzalloc(size, flags);
+|
+- E = kzalloc(size, flags | __GFP_NOWARN);
+- if (\(!E\|E == NULL\))
+- E = vzalloc(size);
++ E = kvzalloc(size, flags);
+|
+- T x = kzalloc(size, flags | __GFP_NOWARN);
+- if (\(!x\|x == NULL\))
+- x = vzalloc(size);
++ T x = kvzalloc(size, flags);
+|
+- if (\(size <= E1\|size < E1\|size == E1\|size > E1\))
+- E = kmalloc_node(size, flags, node);
+- else
+- E = vmalloc_node(size, node);
++ E = kvmalloc_node(size, flags, node);
+|
+- E = kmalloc_node(size, flags | __GFP_NOWARN, node);
+- if (\(!E\|E == NULL\))
+- E = vmalloc_node(size, node);
++ E = kvmalloc_node(size, flags, node);
+|
+- T x = kmalloc_node(size, flags | __GFP_NOWARN, node);
+- if (\(!x\|x == NULL\))
+- x = vmalloc_node(size, node);
++ T x = kvmalloc_node(size, flags, node);
+|
+- if (\(size <= E1\|size < E1\|size == E1\|size > E1\))
+- E = kvzalloc_node(size, flags, node);
+- else
+- E = vzalloc_node(size, node);
++ E = kvzalloc_node(size, flags, node);
+|
+- E = kvzalloc_node(size, flags | __GFP_NOWARN, node);
+- if (\(!E\|E == NULL\))
+- E = vzalloc_node(size, node);
++ E = kvzalloc_node(size, flags, node);
+|
+- T x = kvzalloc_node(size, flags | __GFP_NOWARN, node);
+- if (\(!x\|x == NULL\))
+- x = vzalloc_node(size, node);
++ T x = kvzalloc_node(size, flags, node);
+)
+
+@script: python depends on report@
+p << opportunity.p;
+@@
+
+coccilib.report.print_report(p[0], "WARNING: opportunity for kvmalloc")
+
+@script: python depends on org@
+p << opportunity.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING: opportunity for kvmalloc")
--
2.26.2
On Mon, 3 Aug 2020, Markus Elfring wrote:
> …
> > +++ b/scripts/coccinelle/api/kvmalloc.cocci
> …
> > +@opportunity depends on !patch@
> > +expression E, E1, size;
> > +position p;
> > +@@
> > +
> > +(
> …
> > +|
> > +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
> > +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...)
> > + ... when != E = E1
> > + when != size = E1
> > + when any
> > +* if (\(!E\|E == NULL\))@p {
Actually, you shouldn't need both E == NULL and !E. E == NULL should be
sufficient.
julia
> …
>
> I suggest to extend the SmPL code exclusion specification so that
> pointer dereferences will be filtered out before the shown null pointer detection.
>
>
> > +@depends on patch@
> > +expression E, E1, flags, size, node;
> > +identifier x;
> > +type T;
> > +@@
> > +
> > +(
> > +- if (\(size <= E1\|size < E1\|size == E1\|size > E1\))
>
> This condition check is repeated a few times.
> Thus I imagine that the usage of another metavariable with a SmPL constraint
> can eventually be helpful.
>
> +binary operator bo = {<=, <, ==, >};
> …
> +-if (size bo E1)
>
>
>
> > +- E = kmalloc(size, flags);
> > +- else
> > +- E = vmalloc(size);
>
> Will it be interesting to support also the use of conditional operators
> by another part of a SmPL disjunction?
>
> -E = (…) ? kmalloc(size, flags) : vmalloc(size);
>
>
> > ++ E = kvmalloc(size, flags);
> > +|
> > +- E = kmalloc(size, flags | __GFP_NOWARN);
> > +- if (\(!E\|E == NULL\))
> > +- E = vmalloc(size);
> > ++ E = kvmalloc(size, flags);
>
> This source code replacement line is repeated. Thus I imagine
> that it would be nice if such SmPL code duplication could be avoided
> by the application of another SmPL disjunction.
> Unfortunately, the software “Coccinelle 1.0.8-00146-g04f36d53” presents
> the error message “15: no available token to attach to” then.
> Would you like to adjust anything in this area?
>
> Regards,
> Markus
>
Suggest kvmalloc instead of opencoded kmalloc && vmalloc condition.
Signed-off-by: Denis Efremov <[email protected]>
---
Changes in v2:
- binary operator cmp added
- NULL comparisions simplified
- "T x" case added to !patch mode
scripts/coccinelle/api/kvmalloc.cocci | 142 ++++++++++++++++++++++++++
1 file changed, 142 insertions(+)
create mode 100644 scripts/coccinelle/api/kvmalloc.cocci
diff --git a/scripts/coccinelle/api/kvmalloc.cocci b/scripts/coccinelle/api/kvmalloc.cocci
new file mode 100644
index 000000000000..20b22e3d0f74
--- /dev/null
+++ b/scripts/coccinelle/api/kvmalloc.cocci
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0-only
+///
+/// Find if/else condition with kmalloc/vmalloc calls.
+/// Suggest to use kvmalloc instead.
+///
+// Confidence: High
+// Copyright: (C) 2020 Denis Efremov ISPRAS
+// Options: --no-includes --include-headers
+//
+
+virtual patch
+virtual report
+virtual org
+virtual context
+
+@opportunity depends on !patch@
+expression E, E1, size;
+binary operator cmp = {<=, <, ==, >, >=};
+identifier x;
+type T;
+position p;
+@@
+
+(
+* if (size cmp E1 || ...)@p {
+ ...
+* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
+* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...)
+ ...
+ } else {
+ ...
+* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
+ ...
+ }
+|
+* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
+* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...)
+ ... when != E = E1
+ when != size = E1
+ when any
+* if (E == NULL)@p {
+ ...
+* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
+ ...
+ }
+|
+* T x = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
+* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...);
+ ... when != x = E1
+ when != size = E1
+ when any
+* if (x == NULL)@p {
+ ...
+* x = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
+ ...
+ }
+)
+
+@depends on patch@
+expression E, E1, flags, size, node;
+binary operator cmp = {<=, <, ==, >, >=};
+identifier x;
+type T;
+@@
+
+(
+- if (size cmp E1)
+- E = kmalloc(size, flags);
+- else
+- E = vmalloc(size);
++ E = kvmalloc(size, flags);
+|
+- E = kmalloc(size, flags | __GFP_NOWARN);
+- if (E == NULL)
+- E = vmalloc(size);
++ E = kvmalloc(size, flags);
+|
+- T x = kmalloc(size, flags | __GFP_NOWARN);
+- if (x == NULL)
+- x = vmalloc(size);
++ T x = kvmalloc(size, flags);
+|
+- if (size cmp E1)
+- E = kzalloc(size, flags);
+- else
+- E = vzalloc(size);
++ E = kvzalloc(size, flags);
+|
+- E = kzalloc(size, flags | __GFP_NOWARN);
+- if (E == NULL)
+- E = vzalloc(size);
++ E = kvzalloc(size, flags);
+|
+- T x = kzalloc(size, flags | __GFP_NOWARN);
+- if (x == NULL)
+- x = vzalloc(size);
++ T x = kvzalloc(size, flags);
+|
+- if (size cmp E1)
+- E = kmalloc_node(size, flags, node);
+- else
+- E = vmalloc_node(size, node);
++ E = kvmalloc_node(size, flags, node);
+|
+- E = kmalloc_node(size, flags | __GFP_NOWARN, node);
+- if (E == NULL)
+- E = vmalloc_node(size, node);
++ E = kvmalloc_node(size, flags, node);
+|
+- T x = kmalloc_node(size, flags | __GFP_NOWARN, node);
+- if (x == NULL)
+- x = vmalloc_node(size, node);
++ T x = kvmalloc_node(size, flags, node);
+|
+- if (size cmp E1)
+- E = kvzalloc_node(size, flags, node);
+- else
+- E = vzalloc_node(size, node);
++ E = kvzalloc_node(size, flags, node);
+|
+- E = kvzalloc_node(size, flags | __GFP_NOWARN, node);
+- if (E == NULL)
+- E = vzalloc_node(size, node);
++ E = kvzalloc_node(size, flags, node);
+|
+- T x = kvzalloc_node(size, flags | __GFP_NOWARN, node);
+- if (x == NULL)
+- x = vzalloc_node(size, node);
++ T x = kvzalloc_node(size, flags, node);
+)
+
+@script: python depends on report@
+p << opportunity.p;
+@@
+
+coccilib.report.print_report(p[0], "WARNING: opportunity for kvmalloc")
+
+@script: python depends on org@
+p << opportunity.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING: opportunity for kvmalloc")
--
2.26.2
Suggest kvmalloc, kvfree instead of opencoded patterns.
Signed-off-by: Denis Efremov <[email protected]>
---
Changes in v2:
- binary operator cmp added
- NULL comparisions simplified
- "T x" case added to !patch mode
Changes in v3:
- kvfree rules added
scripts/coccinelle/api/kvmalloc.cocci | 188 ++++++++++++++++++++++++++
1 file changed, 188 insertions(+)
create mode 100644 scripts/coccinelle/api/kvmalloc.cocci
diff --git a/scripts/coccinelle/api/kvmalloc.cocci b/scripts/coccinelle/api/kvmalloc.cocci
new file mode 100644
index 000000000000..2cb9281cc092
--- /dev/null
+++ b/scripts/coccinelle/api/kvmalloc.cocci
@@ -0,0 +1,188 @@
+// SPDX-License-Identifier: GPL-2.0-only
+///
+/// Find if/else condition with kmalloc/vmalloc calls.
+/// Suggest to use kvmalloc instead. Same for kvfree.
+///
+// Confidence: High
+// Copyright: (C) 2020 Denis Efremov ISPRAS
+// Options: --no-includes --include-headers
+//
+
+virtual patch
+virtual report
+virtual org
+virtual context
+
+@initialize:python@
+@@
+filter = frozenset(['kvfree'])
+
+def relevant(p):
+ return not (filter & {el.current_element for el in p})
+
+@kvmalloc depends on !patch@
+expression E, E1, size;
+binary operator cmp = {<=, <, ==, >, >=};
+identifier x;
+type T;
+position p;
+@@
+
+(
+* if (size cmp E1 || ...)@p {
+ ...
+* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
+* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...)
+ ...
+ } else {
+ ...
+* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
+ ...
+ }
+|
+* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
+* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...)
+ ... when != E = E1
+ when != size = E1
+ when any
+* if (E == NULL)@p {
+ ...
+* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
+ ...
+ }
+|
+* T x = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
+* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...);
+ ... when != x = E1
+ when != size = E1
+ when any
+* if (x == NULL)@p {
+ ...
+* x = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
+ ...
+ }
+)
+
+@kvfree depends on !patch@
+expression E;
+position p : script:python() { relevant(p) };
+@@
+
+* if (is_vmalloc_addr(E))@p {
+ ...
+* vfree(E)
+ ...
+ } else {
+ ... when != krealloc(E, ...)
+ when any
+* \(kfree\|kzfree\)(E)
+ ...
+ }
+
+@depends on patch@
+expression E, E1, flags, size, node;
+binary operator cmp = {<=, <, ==, >, >=};
+identifier x;
+type T;
+@@
+
+(
+- if (size cmp E1)
+- E = kmalloc(size, flags);
+- else
+- E = vmalloc(size);
++ E = kvmalloc(size, flags);
+|
+- E = kmalloc(size, flags | __GFP_NOWARN);
+- if (E == NULL)
+- E = vmalloc(size);
++ E = kvmalloc(size, flags);
+|
+- T x = kmalloc(size, flags | __GFP_NOWARN);
+- if (x == NULL)
+- x = vmalloc(size);
++ T x = kvmalloc(size, flags);
+|
+- if (size cmp E1)
+- E = kzalloc(size, flags);
+- else
+- E = vzalloc(size);
++ E = kvzalloc(size, flags);
+|
+- E = kzalloc(size, flags | __GFP_NOWARN);
+- if (E == NULL)
+- E = vzalloc(size);
++ E = kvzalloc(size, flags);
+|
+- T x = kzalloc(size, flags | __GFP_NOWARN);
+- if (x == NULL)
+- x = vzalloc(size);
++ T x = kvzalloc(size, flags);
+|
+- if (size cmp E1)
+- E = kmalloc_node(size, flags, node);
+- else
+- E = vmalloc_node(size, node);
++ E = kvmalloc_node(size, flags, node);
+|
+- E = kmalloc_node(size, flags | __GFP_NOWARN, node);
+- if (E == NULL)
+- E = vmalloc_node(size, node);
++ E = kvmalloc_node(size, flags, node);
+|
+- T x = kmalloc_node(size, flags | __GFP_NOWARN, node);
+- if (x == NULL)
+- x = vmalloc_node(size, node);
++ T x = kvmalloc_node(size, flags, node);
+|
+- if (size cmp E1)
+- E = kvzalloc_node(size, flags, node);
+- else
+- E = vzalloc_node(size, node);
++ E = kvzalloc_node(size, flags, node);
+|
+- E = kvzalloc_node(size, flags | __GFP_NOWARN, node);
+- if (E == NULL)
+- E = vzalloc_node(size, node);
++ E = kvzalloc_node(size, flags, node);
+|
+- T x = kvzalloc_node(size, flags | __GFP_NOWARN, node);
+- if (x == NULL)
+- x = vzalloc_node(size, node);
++ T x = kvzalloc_node(size, flags, node);
+)
+
+@depends on patch@
+expression E;
+position p : script:python() { relevant(p) };
+@@
+
+- if (is_vmalloc_addr(E))@p
+- vfree(E);
+- else
+- kfree(E);
++ kvfree(E);
+
+@script: python depends on report@
+p << kvmalloc.p;
+@@
+
+coccilib.report.print_report(p[0], "WARNING: opportunity for kvmalloc")
+
+@script: python depends on org@
+p << kvmalloc.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING: opportunity for kvmalloc")
+
+@script: python depends on report@
+p << kvfree.p;
+@@
+
+coccilib.report.print_report(p[0], "WARNING: opportunity for kvfree")
+
+@script: python depends on org@
+p << kvfree.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING: opportunity for kvfree")
--
2.26.2
On Tue, 4 Aug 2020, Markus Elfring wrote:
> > Changes in v3:
> > - kvfree rules added
>
> I find it interesting to you found such an addition needed for this SmPL script.
> I imagine that it can be helpful to support such a source code search by
> a separate script for the semantic patch language.
>
> I am curious if my patch review comments for the second version got also a bit
> of your software development attention.
>
> Another implementation detail is relevant for further clarification.
> The SmPL rules for patch generation differ in search functionality
> which is provided for other operation modes.
> Can these deviations influence the confidence level?
I see no useful information in this review, nor in the v2 review.
julia
Suggest kvmalloc, kvfree instead of opencoded patterns.
Signed-off-by: Denis Efremov <[email protected]>
---
Changes in v2:
- binary operator cmp added
- NULL comparisions simplified
- "T x" case added to !patch mode
Changes in v3:
- kvfree rules added
Changes in v4:
- pattern updated to match only GFP_KERNEL/__GFP_NOWARN flags
to avoid possible false-positives
All patches are sent:
[1] https://lore.kernel.org/patchwork/patch/1296428/
[2] https://lore.kernel.org/patchwork/patch/1296636/
[3] https://lore.kernel.org/patchwork/patch/1282895/
[4] https://lore.kernel.org/patchwork/patch/1296631/
scripts/coccinelle/api/kvmalloc.cocci | 256 ++++++++++++++++++++++++++
1 file changed, 256 insertions(+)
create mode 100644 scripts/coccinelle/api/kvmalloc.cocci
diff --git a/scripts/coccinelle/api/kvmalloc.cocci b/scripts/coccinelle/api/kvmalloc.cocci
new file mode 100644
index 000000000000..c30dab718a49
--- /dev/null
+++ b/scripts/coccinelle/api/kvmalloc.cocci
@@ -0,0 +1,256 @@
+// SPDX-License-Identifier: GPL-2.0-only
+///
+/// Find if/else condition with kmalloc/vmalloc calls.
+/// Suggest to use kvmalloc instead. Same for kvfree.
+///
+// Confidence: High
+// Copyright: (C) 2020 Denis Efremov ISPRAS
+// Options: --no-includes --include-headers
+//
+
+virtual patch
+virtual report
+virtual org
+virtual context
+
+@initialize:python@
+@@
+filter = frozenset(['kvfree'])
+
+def relevant(p):
+ return not (filter & {el.current_element for el in p})
+
+@kvmalloc depends on !patch@
+expression E, E1, size;
+identifier flags;
+binary operator cmp = {<=, <, ==, >, >=};
+identifier x;
+type T;
+position p;
+@@
+
+(
+* if (size cmp E1 || ...)@p {
+ ...
+* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
+* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)
+* (..., size, \(flags\|GFP_KERNEL\|\(GFP_KERNEL\|flags\)|__GFP_NOWARN\), ...)
+ ...
+ } else {
+ ...
+* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
+ ...
+ }
+|
+* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
+* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)
+* (..., size, \(flags\|GFP_KERNEL\|\(GFP_KERNEL\|flags\)|__GFP_NOWARN\), ...)
+ ... when != E = E1
+ when != size = E1
+ when any
+* if (E == NULL)@p {
+ ...
+* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
+ ...
+ }
+|
+* T x = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
+* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)
+* (..., size, \(flags\|GFP_KERNEL\|\(GFP_KERNEL\|flags\)|__GFP_NOWARN\), ...);
+ ... when != x = E1
+ when != size = E1
+ when any
+* if (x == NULL)@p {
+ ...
+* x = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...)
+ ...
+ }
+)
+
+@kvfree depends on !patch@
+expression E;
+position p : script:python() { relevant(p) };
+@@
+
+* if (is_vmalloc_addr(E))@p {
+ ...
+* vfree(E)
+ ...
+ } else {
+ ... when != krealloc(E, ...)
+ when any
+* \(kfree\|kzfree\)(E)
+ ...
+ }
+
+@depends on patch@
+expression E, E1, size, node;
+binary operator cmp = {<=, <, ==, >, >=};
+identifier flags, x;
+type T;
+@@
+
+(
+- if (size cmp E1)
+- E = kmalloc(size, flags);
+- else
+- E = vmalloc(size);
++ E = kvmalloc(size, flags);
+|
+- if (size cmp E1)
+- E = kmalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\));
+- else
+- E = vmalloc(size);
++ E = kvmalloc(size, GFP_KERNEL);
+|
+- E = kmalloc(size, flags | __GFP_NOWARN);
+- if (E == NULL)
+- E = vmalloc(size);
++ E = kvmalloc(size, flags);
+|
+- E = kmalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\));
+- if (E == NULL)
+- E = vmalloc(size);
++ E = kvmalloc(size, GFP_KERNEL);
+|
+- T x = kmalloc(size, flags | __GFP_NOWARN);
+- if (x == NULL)
+- x = vmalloc(size);
++ T x = kvmalloc(size, flags);
+|
+- T x = kmalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\));
+- if (x == NULL)
+- x = vmalloc(size);
++ T x = kvmalloc(size, GFP_KERNEL);
+|
+- if (size cmp E1)
+- E = kzalloc(size, flags);
+- else
+- E = vzalloc(size);
++ E = kvzalloc(size, flags);
+|
+- if (size cmp E1)
+- E = kzalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\));
+- else
+- E = vzalloc(size);
++ E = kvzalloc(size, GFP_KERNEL);
+|
+- E = kzalloc(size, flags | __GFP_NOWARN);
+- if (E == NULL)
+- E = vzalloc(size);
++ E = kvzalloc(size, flags);
+|
+- E = kzalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\));
+- if (E == NULL)
+- E = vzalloc(size);
++ E = kvzalloc(size, GFP_KERNEL);
+|
+- T x = kzalloc(size, flags | __GFP_NOWARN);
+- if (x == NULL)
+- x = vzalloc(size);
++ T x = kvzalloc(size, flags);
+|
+- T x = kzalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\));
+- if (x == NULL)
+- x = vzalloc(size);
++ T x = kvzalloc(size, GFP_KERNEL);
+|
+- if (size cmp E1)
+- E = kmalloc_node(size, flags, node);
+- else
+- E = vmalloc_node(size, node);
++ E = kvmalloc_node(size, flags, node);
+|
+- if (size cmp E1)
+- E = kmalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node);
+- else
+- E = vmalloc_node(size, node);
++ E = kvmalloc_node(size, GFP_KERNEL, node);
+|
+- E = kmalloc_node(size, flags | __GFP_NOWARN, node);
+- if (E == NULL)
+- E = vmalloc_node(size, node);
++ E = kvmalloc_node(size, flags, node);
+|
+- E = kmalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node);
+- if (E == NULL)
+- E = vmalloc_node(size, node);
++ E = kvmalloc_node(size, GFP_KERNEL, node);
+|
+- T x = kmalloc_node(size, flags | __GFP_NOWARN, node);
+- if (x == NULL)
+- x = vmalloc_node(size, node);
++ T x = kvmalloc_node(size, flags, node);
+|
+- T x = kmalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node);
+- if (x == NULL)
+- x = vmalloc_node(size, node);
++ T x = kvmalloc_node(size, GFP_KERNEL, node);
+|
+- if (size cmp E1)
+- E = kvzalloc_node(size, flags, node);
+- else
+- E = vzalloc_node(size, node);
++ E = kvzalloc_node(size, flags, node);
+|
+- if (size cmp E1)
+- E = kvzalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node);
+- else
+- E = vzalloc_node(size, node);
++ E = kvzalloc_node(size, GFP_KERNEL, node);
+|
+- E = kvzalloc_node(size, flags | __GFP_NOWARN, node);
+- if (E == NULL)
+- E = vzalloc_node(size, node);
++ E = kvzalloc_node(size, flags, node);
+|
+- E = kvzalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node);
+- if (E == NULL)
+- E = vzalloc_node(size, node);
++ E = kvzalloc_node(size, GFP_KERNEL, node);
+|
+- T x = kvzalloc_node(size, flags | __GFP_NOWARN, node);
+- if (x == NULL)
+- x = vzalloc_node(size, node);
++ T x = kvzalloc_node(size, flags, node);
+|
+- T x = kvzalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node);
+- if (x == NULL)
+- x = vzalloc_node(size, node);
++ T x = kvzalloc_node(size, GFP_KERNEL, node);
+)
+
+@depends on patch@
+expression E;
+position p : script:python() { relevant(p) };
+@@
+
+- if (is_vmalloc_addr(E))@p
+- vfree(E);
+- else
+- kfree(E);
++ kvfree(E);
+
+@script: python depends on report@
+p << kvmalloc.p;
+@@
+
+coccilib.report.print_report(p[0], "WARNING opportunity for kvmalloc")
+
+@script: python depends on org@
+p << kvmalloc.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING opportunity for kvmalloc")
+
+@script: python depends on report@
+p << kvfree.p;
+@@
+
+coccilib.report.print_report(p[0], "WARNING opportunity for kvfree")
+
+@script: python depends on org@
+p << kvfree.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING opportunity for kvfree")
--
2.26.2