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Merge branch 'for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux

Browse Source 
Pull coccinelle updates from Julia Lawall.

* 'for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux:
  coccinelle: api: add kfree_mismatch script
  coccinelle: iterators: Add for_each_child.cocci script
  scripts: coccicheck: Change default condition for parallelism
  scripts: coccicheck: Add quotes to improve portability
  coccinelle: api: kfree_sensitive: print memset position
  coccinelle: misc: add flexible_array.cocci script
  coccinelle: api: add kvmalloc script
  scripts: coccicheck: Change default value for parallelism
  coccinelle: misc: add excluded_middle.cocci script
  scripts: coccicheck: Improve error feedback when coccicheck fails
  coccinelle: api: update kzfree script to kfree_sensitive
  coccinelle: misc: add uninitialized_var.cocci script
  coccinelle: ifnullfree: add vfree(), kvfree*() functions
  coccinelle: api: add kobj_to_dev.cocci script
  coccinelle: add patch rule for dma_alloc_coherent
  scripts: coccicheck: Add chain mode to list of modes
This commit is contained in:
Linus Torvalds 2020-10-18 14:20:35 -07:00
commit f66179ca7a
11 changed files with 1118 additions and 26 deletions
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17
scripts/coccicheck
View File

@ -75,8 +75,13 @@ else
OPTIONS="--dir $KBUILD_EXTMOD $COCCIINCLUDE"
fi
# Use only one thread per core by default if hyperthreading is enabled
THREADS_PER_CORE=$(lscpu | grep "Thread(s) per core: " | tr -cd "[:digit:]")
if [ -z "$J" ]; then
NPROC=$(getconf _NPROCESSORS_ONLN)
if [ $THREADS_PER_CORE -gt 1 -a $NPROC -gt 4 ] ; then
NPROC=$((NPROC/2))
fi
else
NPROC="$J"
fi
@ -99,7 +104,7 @@ fi
if [ "$MODE" = "" ] ; then
if [ "$ONLINE" = "0" ] ; then
echo 'You have not explicitly specified the mode to use. Using default "report" mode.'
echo 'Available modes are the following: patch, report, context, org'
echo 'Available modes are the following: patch, report, context, org, chain'
echo 'You can specify the mode with "make coccicheck MODE=<mode>"'
echo 'Note however that some modes are not implemented by some semantic patches.'
fi
@ -126,8 +131,14 @@ run_cmd_parmap() {
if [ $VERBOSE -ne 0 ] ; then
echo "Running ($NPROC in parallel): $@"
fi
echo $@ >>$DEBUG_FILE
$@ 2>>$DEBUG_FILE
if [ "$DEBUG_FILE" != "/dev/null" -a "$DEBUG_FILE" != "" ]; then
echo $@>>$DEBUG_FILE
$@ 2>>$DEBUG_FILE
else
echo $@
$@ 2>&1
fi
err=$?
if [[ $err -ne 0 ]]; then
echo "coccicheck failed"

16
scripts/coccinelle/api/alloc/zalloc-simple.cocci
View File

@ -127,6 +127,16 @@ statement S;
if ((x==NULL) || ...) S
- memset((T2)x,0,E1);
@depends on patch@
type T, T2;
expression x;
expression E1,E2,E3,E4;
statement S;
@@
x = (T)dma_alloc_coherent(E1, E2, E3, E4);
if ((x==NULL) || ...) S
- memset((T2)x, 0, E2);
//----------------------------------------------------------
// For org mode
//----------------------------------------------------------
@ -199,9 +209,9 @@ statement S;
position p;
@@
x = (T)dma_alloc_coherent@p(E2,E1,E3,E4);
x = (T)dma_alloc_coherent@p(E1,E2,E3,E4);
if ((x==NULL) || ...) S
memset((T2)x,0,E1);
memset((T2)x,0,E2);
@script:python depends on org@
p << r2.p;
@ -217,7 +227,7 @@ p << r2.p;
x << r2.x;
@@
msg="WARNING: dma_alloc_coherent use in %s already zeroes out memory, so memset is not needed" % (x)
msg="WARNING: dma_alloc_coherent used in %s already zeroes out memory, so memset is not needed" % (x)
coccilib.report.print_report(p[0], msg)
//-----------------------------------------------------------------

228
scripts/coccinelle/api/kfree_mismatch.cocci Normal file
View File

@ -0,0 +1,228 @@
// SPDX-License-Identifier: GPL-2.0-only
///
/// Check that kvmalloc'ed memory is freed by kfree functions,
/// vmalloc'ed by vfree functions and kvmalloc'ed by kvfree
/// functions.
///
// Confidence: High
// Copyright: (C) 2020 Denis Efremov ISPRAS
// Options: --no-includes --include-headers
//
virtual patch
virtual report
virtual org
virtual context
@alloc@
expression E, E1;
position kok, vok;
@@
(
if (...) {
...
E = \(kmalloc\|kzalloc\|krealloc\|kcalloc\|
kmalloc_node\|kzalloc_node\|kmalloc_array\|
kmalloc_array_node\|kcalloc_node\)(...)@kok
...
} else {
...
E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|
vzalloc_node\|vmalloc_exec\|vmalloc_32\|
vmalloc_32_user\|__vmalloc\|__vmalloc_node_range\|
__vmalloc_node\)(...)@vok
...
}
|
E = \(kmalloc\|kzalloc\|krealloc\|kcalloc\|kmalloc_node\|kzalloc_node\|
kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(...)@kok
... when != E = E1
when any
if (E == NULL) {
...
E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|
vzalloc_node\|vmalloc_exec\|vmalloc_32\|
vmalloc_32_user\|__vmalloc\|__vmalloc_node_range\|
__vmalloc_node\)(...)@vok
...
}
)
@free@
expression E;
position fok;
@@
E = \(kvmalloc\|kvzalloc\|kvcalloc\|kvzalloc_node\|kvmalloc_node\|
kvmalloc_array\)(...)
...
kvfree(E)@fok
@vfree depends on !patch@
expression E;
position a != alloc.kok;
position f != free.fok;
@@
* E = \(kmalloc\|kzalloc\|krealloc\|kcalloc\|kmalloc_node\|
* kzalloc_node\|kmalloc_array\|kmalloc_array_node\|
* kcalloc_node\)(...)@a
... when != if (...) { ... E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|vzalloc_node\|vmalloc_exec\|vmalloc_32\|vmalloc_32_user\|__vmalloc\|__vmalloc_node_range\|__vmalloc_node\)(...); ... }
when != is_vmalloc_addr(E)
when any
* \(vfree\|vfree_atomic\|kvfree\)(E)@f
@depends on patch exists@
expression E;
position a != alloc.kok;
position f != free.fok;
@@
E = \(kmalloc\|kzalloc\|krealloc\|kcalloc\|kmalloc_node\|
kzalloc_node\|kmalloc_array\|kmalloc_array_node\|
kcalloc_node\)(...)@a
... when != if (...) { ... E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|vzalloc_node\|vmalloc_exec\|vmalloc_32\|vmalloc_32_user\|__vmalloc\|__vmalloc_node_range\|__vmalloc_node\)(...); ... }
when != is_vmalloc_addr(E)
when any
- \(vfree\|vfree_atomic\|kvfree\)(E)@f
+ kfree(E)
@kfree depends on !patch@
expression E;
position a != alloc.vok;
position f != free.fok;
@@
* E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|vzalloc_node\|
* vmalloc_exec\|vmalloc_32\|vmalloc_32_user\|__vmalloc\|
* __vmalloc_node_range\|__vmalloc_node\)(...)@a
... when != is_vmalloc_addr(E)
when any
* \(kfree\|kfree_sensitive\|kvfree\)(E)@f
@depends on patch exists@
expression E;
position a != alloc.vok;
position f != free.fok;
@@
E = \(vmalloc\|vzalloc\|vmalloc_user\|vmalloc_node\|vzalloc_node\|
vmalloc_exec\|vmalloc_32\|vmalloc_32_user\|__vmalloc\|
__vmalloc_node_range\|__vmalloc_node\)(...)@a
... when != is_vmalloc_addr(E)
when any
- \(kfree\|kvfree\)(E)@f
+ vfree(E)
@kvfree depends on !patch@
expression E;
position a, f;
@@
* E = \(kvmalloc\|kvzalloc\|kvcalloc\|kvzalloc_node\|kvmalloc_node\|
* kvmalloc_array\)(...)@a
... when != is_vmalloc_addr(E)
when any
* \(kfree\|kfree_sensitive\|vfree\|vfree_atomic\)(E)@f
@depends on patch exists@
expression E;
@@
E = \(kvmalloc\|kvzalloc\|kvcalloc\|kvzalloc_node\|kvmalloc_node\|
kvmalloc_array\)(...)
... when != is_vmalloc_addr(E)
when any
- \(kfree\|vfree\)(E)
+ kvfree(E)
@kvfree_switch depends on !patch@
expression alloc.E;
position f;
@@
... when != is_vmalloc_addr(E)
when any
* \(kfree\|kfree_sensitive\|vfree\|vfree_atomic\)(E)@f
@depends on patch exists@
expression alloc.E;
position f;
@@
... when != is_vmalloc_addr(E)
when any
(
- \(kfree\|vfree\)(E)@f
+ kvfree(E)
|
- kfree_sensitive(E)@f
+ kvfree_sensitive(E)
)
@script: python depends on report@
a << vfree.a;
f << vfree.f;
@@
msg = "WARNING kmalloc is used to allocate this memory at line %s" % (a[0].line)
coccilib.report.print_report(f[0], msg)
@script: python depends on org@
a << vfree.a;
f << vfree.f;
@@
msg = "WARNING kmalloc is used to allocate this memory at line %s" % (a[0].line)
coccilib.org.print_todo(f[0], msg)
@script: python depends on report@
a << kfree.a;
f << kfree.f;
@@
msg = "WARNING vmalloc is used to allocate this memory at line %s" % (a[0].line)
coccilib.report.print_report(f[0], msg)
@script: python depends on org@
a << kfree.a;
f << kfree.f;
@@
msg = "WARNING vmalloc is used to allocate this memory at line %s" % (a[0].line)
coccilib.org.print_todo(f[0], msg)
@script: python depends on report@
a << kvfree.a;
f << kvfree.f;
@@
msg = "WARNING kvmalloc is used to allocate this memory at line %s" % (a[0].line)
coccilib.report.print_report(f[0], msg)
@script: python depends on org@
a << kvfree.a;
f << kvfree.f;
@@
msg = "WARNING kvmalloc is used to allocate this memory at line %s" % (a[0].line)
coccilib.org.print_todo(f[0], msg)
@script: python depends on report@
ka << alloc.kok;
va << alloc.vok;
f << kvfree_switch.f;
@@
msg = "WARNING kmalloc (line %s) && vmalloc (line %s) are used to allocate this memory" % (ka[0].line, va[0].line)
coccilib.report.print_report(f[0], msg)
@script: python depends on org@
ka << alloc.kok;
va << alloc.vok;
f << kvfree_switch.f;
@@
msg = "WARNING kmalloc (line %s) && vmalloc (line %s) are used to allocate this memory" % (ka[0].line, va[0].line)
coccilib.org.print_todo(f[0], msg)

35
scripts/coccinelle/api/kzfree.cocci → scripts/coccinelle/api/kfree_sensitive.cocci
View File

@ -1,13 +1,13 @@
// SPDX-License-Identifier: GPL-2.0-only
///
/// Use kzfree, kvfree_sensitive rather than memset or
/// memzero_explicit followed by kfree
/// Use kfree_sensitive, kvfree_sensitive rather than memset or
/// memzero_explicit followed by kfree.
///
// Confidence: High
// Copyright: (C) 2020 Denis Efremov ISPRAS
// Options: --no-includes --include-headers
//
// Keywords: kzfree, kvfree_sensitive
// Keywords: kfree_sensitive, kvfree_sensitive
//
virtual context
@ -18,7 +18,8 @@ virtual report
@initialize:python@
@@
# kmalloc_oob_in_memset uses memset to explicitly trigger out-of-bounds access
filter = frozenset(['kmalloc_oob_in_memset', 'kzfree', 'kvfree_sensitive'])
filter = frozenset(['kmalloc_oob_in_memset',
'kfree_sensitive', 'kvfree_sensitive'])
def relevant(p):
return not (filter & {el.current_element for el in p})
@ -56,17 +57,13 @@ type T;
- memzero_explicit@m((T)E, size);
... when != E
when strict
// TODO: uncomment when kfree_sensitive will be merged.
// Only this case is commented out because developers
// may not like patches like this since kzfree uses memset
// internally (not memzero_explicit).
//(
//- kfree(E)@p;
//+ kfree_sensitive(E);
//|
(
- kfree(E)@p;
+ kfree_sensitive(E);
|
- \(vfree\|kvfree\)(E)@p;
+ kvfree_sensitive(E, size);
//)
)
@rp_memset depends on patch@
expression E, size;
@ -80,7 +77,7 @@ type T;
when strict
(
- kfree(E)@p;
+ kzfree(E);
+ kfree_sensitive(E);
|
- \(vfree\|kvfree\)(E)@p;
+ kvfree_sensitive(E, size);
@ -88,14 +85,16 @@ type T;
@script:python depends on report@
p << r.p;
m << r.m;
@@
coccilib.report.print_report(p[0],
"WARNING: opportunity for kzfree/kvfree_sensitive")
msg = "WARNING opportunity for kfree_sensitive/kvfree_sensitive (memset at line %s)"
coccilib.report.print_report(p[0], msg % (m[0].line))
@script:python depends on org@
p << r.p;
m << r.m;
@@
coccilib.org.print_todo(p[0],
"WARNING: opportunity for kzfree/kvfree_sensitive")
msg = "WARNING opportunity for kfree_sensitive/kvfree_sensitive (memset at line %s)"
coccilib.org.print_todo(p[0], msg % (m[0].line))

45
scripts/coccinelle/api/kobj_to_dev.cocci Normal file
View File

@ -0,0 +1,45 @@
// SPDX-License-Identifier: GPL-2.0-only
///
/// Use kobj_to_dev() instead of container_of()
///
// Confidence: High
// Copyright: (C) 2020 Denis Efremov ISPRAS
// Options: --no-includes --include-headers
//
// Keywords: kobj_to_dev, container_of
//
virtual context
virtual report
virtual org
virtual patch
@r depends on !patch@
expression ptr;
symbol kobj;
position p;
@@
* container_of(ptr, struct device, kobj)@p
@depends on patch@
expression ptr;
@@
- container_of(ptr, struct device, kobj)
+ kobj_to_dev(ptr)
@script:python depends on report@
p << r.p;
@@
coccilib.report.print_report(p[0], "WARNING opportunity for kobj_to_dev()")
@script:python depends on org@
p << r.p;
@@
coccilib.org.print_todo(p[0], "WARNING opportunity for kobj_to_dev()")

256
scripts/coccinelle/api/kvmalloc.cocci Normal file
View File

@ -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")

11
scripts/coccinelle/free/ifnullfree.cocci
View File

@ -20,8 +20,14 @@ expression E;
- if (E != NULL)
(
kfree(E);
|
kvfree(E);
|
kfree_sensitive(E);
|
kvfree_sensitive(E, ...);
|
vfree(E);
|
debugfs_remove(E);
|
@ -42,9 +48,10 @@ position p;
@@
* if (E != NULL)
* \(kfree@p\|kfree_sensitive@p\|debugfs_remove@p\|debugfs_remove_recursive@p\|
* \(kfree@p\|kvfree@p\|kfree_sensitive@p\|kvfree_sensitive@p\|vfree@p\|
* debugfs_remove@p\|debugfs_remove_recursive@p\|
* usb_free_urb@p\|kmem_cache_destroy@p\|mempool_destroy@p\|
* dma_pool_destroy@p\)(E);
* dma_pool_destroy@p\)(E, ...);
@script:python depends on org@
p << r.p;

358
scripts/coccinelle/iterators/for_each_child.cocci Normal file
View File

@ -0,0 +1,358 @@
// SPDX-License-Identifier: GPL-2.0-only
// Adds missing of_node_put() before return/break/goto statement within a for_each iterator for child nodes.
//# False positives can be due to function calls within the for_each
//# loop that may encapsulate an of_node_put.
///
// Confidence: High
// Copyright: (C) 2020 Sumera Priyadarsini
// URL: http://coccinelle.lip6.fr
// Options: --no-includes --include-headers
virtual patch
virtual context
virtual org
virtual report
@r@
local idexpression n;
expression e1,e2;
iterator name for_each_node_by_name, for_each_node_by_type,
for_each_compatible_node, for_each_matching_node,
for_each_matching_node_and_match, for_each_child_of_node,
for_each_available_child_of_node, for_each_node_with_property;
iterator i;
statement S;
expression list [n1] es;
@@
(
(
for_each_node_by_name(n,e1) S
|
for_each_node_by_type(n,e1) S
|
for_each_compatible_node(n,e1,e2) S
|
for_each_matching_node(n,e1) S
|
for_each_matching_node_and_match(n,e1,e2) S
|
for_each_child_of_node(e1,n) S
|
for_each_available_child_of_node(e1,n) S
|
for_each_node_with_property(n,e1) S
)
&
i(es,n,...) S
)
@ruleone depends on patch && !context && !org && !report@
local idexpression r.n;
iterator r.i,i1;
expression e;
expression list [r.n1] es;
statement S;
@@
i(es,n,...) {
...
(
of_node_put(n);
|
e = n
|
return n;
|
i1(...,n,...) S
|
- return of_node_get(n);
+ return n;
|
+ of_node_put(n);
? return ...;
)
... when any
}
@ruletwo depends on patch && !context && !org && !report@
local idexpression r.n;
iterator r.i,i1,i2;
expression e,e1;
expression list [r.n1] es;
statement S,S2;
@@
i(es,n,...) {
...
(
of_node_put(n);
|
e = n
|
i1(...,n,...) S
|
+ of_node_put(n);
? break;
)
... when any
}
... when != n
when strict
when forall
(
n = e1;
|
?i2(...,n,...) S2
)
@rulethree depends on patch && !context && !org && !report exists@
local idexpression r.n;
iterator r.i,i1,i2;
expression e,e1;
identifier l;
expression list [r.n1] es;
statement S,S2;
@@
i(es,n,...) {
...
(
of_node_put(n);
|
e = n
|
i1(...,n,...) S
|
+ of_node_put(n);
? goto l;
)
... when any
}
... when exists
l: ... when != n
when strict
when forall
(
n = e1;
|
?i2(...,n,...) S2
)
// ----------------------------------------------------------------------------
@ruleone_context depends on !patch && (context || org || report) exists@
statement S;
expression e;
expression list[r.n1] es;
iterator r.i, i1;
local idexpression r.n;
position j0, j1;
@@
i@j0(es,n,...) {
...
(
of_node_put(n);
|
e = n
|
return n;
|
i1(...,n,...) S
|
return @j1 ...;
)
... when any
}
@ruleone_disj depends on !patch && (context || org || report)@
expression list[r.n1] es;
iterator r.i;
local idexpression r.n;
position ruleone_context.j0, ruleone_context.j1;
@@
* i@j0(es,n,...) {
...
*return @j1...;
... when any
}
@ruletwo_context depends on !patch && (context || org || report) exists@
statement S, S2;
expression e, e1;
expression list[r.n1] es;
iterator r.i, i1, i2;
local idexpression r.n;
position j0, j2;
@@
i@j0(es,n,...) {
...
(
of_node_put(n);
|
e = n
|
i1(...,n,...) S
|
break@j2;
)
... when any
}
... when != n
when strict
when forall
(
n = e1;
|
?i2(...,n,...) S2
)
@ruletwo_disj depends on !patch && (context || org || report)@
statement S2;
expression e1;
expression list[r.n1] es;
iterator r.i, i2;
local idexpression r.n;
position ruletwo_context.j0, ruletwo_context.j2;
@@
* i@j0(es,n,...) {
...
*break @j2;
... when any
}
... when != n
when strict
when forall
(
n = e1;
|
?i2(...,n,...) S2
)
@rulethree_context depends on !patch && (context || org || report) exists@
identifier l;
statement S,S2;
expression e, e1;
expression list[r.n1] es;
iterator r.i, i1, i2;
local idexpression r.n;
position j0, j3;
@@
i@j0(es,n,...) {
...
(
of_node_put(n);
|
e = n
|
i1(...,n,...) S
|
goto l@j3;
)
... when any
}
... when exists
l:
... when != n
when strict
when forall
(
n = e1;
|
?i2(...,n,...) S2
)
@rulethree_disj depends on !patch && (context || org || report) exists@
identifier l;
statement S2;
expression e1;
expression list[r.n1] es;
iterator r.i, i2;
local idexpression r.n;
position rulethree_context.j0, rulethree_context.j3;
@@
* i@j0(es,n,...) {
...
*goto l@j3;
... when any
}
... when exists
l:
... when != n
when strict
when forall
(
n = e1;
|
?i2(...,n,...) S2
)
// ----------------------------------------------------------------------------
@script:python ruleone_org depends on org@
i << r.i;
j0 << ruleone_context.j0;
j1 << ruleone_context. j1;
@@
msg = "WARNING: Function \"%s\" should have of_node_put() before return " % (i)
coccilib.org.print_safe_todo(j0[0], msg)
coccilib.org.print_link(j1[0], "")
@script:python ruletwo_org depends on org@
i << r.i;
j0 << ruletwo_context.j0;
j2 << ruletwo_context.j2;
@@
msg = "WARNING: Function \"%s\" should have of_node_put() before break " % (i)
coccilib.org.print_safe_todo(j0[0], msg)
coccilib.org.print_link(j2[0], "")
@script:python rulethree_org depends on org@
i << r.i;
j0 << rulethree_context.j0;
j3 << rulethree_context.j3;
@@
msg = "WARNING: Function \"%s\" should have of_node_put() before goto " % (i)
coccilib.org.print_safe_todo(j0[0], msg)
coccilib.org.print_link(j3[0], "")
// ----------------------------------------------------------------------------
@script:python ruleone_report depends on report@
i << r.i;
j0 << ruleone_context.j0;
j1 << ruleone_context.j1;
@@
msg = "WARNING: Function \"%s\" should have of_node_put() before return around line %s." % (i, j1[0].line)
coccilib.report.print_report(j0[0], msg)
@script:python ruletwo_report depends on report@
i << r.i;
j0 << ruletwo_context.j0;
j2 << ruletwo_context.j2;
@@
msg = "WARNING: Function \"%s\" should have of_node_put() before break around line %s." % (i,j2[0].line)
coccilib.report.print_report(j0[0], msg)
@script:python rulethree_report depends on report@
i << r.i;
j0 << rulethree_context.j0;
j3 << rulethree_context.j3;
@@
msg = "WARNING: Function \"%s\" should have of_node_put() before goto around lines %s." % (i,j3[0].line)
coccilib.report.print_report(j0[0], msg)

39
scripts/coccinelle/misc/excluded_middle.cocci Normal file
View File

@ -0,0 +1,39 @@
// SPDX-License-Identifier: GPL-2.0-only
///
/// Condition !A || A && B is equivalent to !A || B.
///
// Confidence: High
// Copyright: (C) 2020 Denis Efremov ISPRAS
// Options: --no-includes --include-headers
virtual patch
virtual context
virtual org
virtual report
@r depends on !patch@
expression A, B;
position p;
@@
* !A || (A &&@p B)
@depends on patch@
expression A, B;
@@
!A ||
- (A && B)
+ B
@script:python depends on report@
p << r.p;
@@
coccilib.report.print_report(p[0], "WARNING !A || A && B is equivalent to !A || B")
@script:python depends on org@
p << r.p;
@@
coccilib.org.print_todo(p[0], "WARNING !A || A && B is equivalent to !A || B")

88
scripts/coccinelle/misc/flexible_array.cocci Normal file
View File

@ -0,0 +1,88 @@
// SPDX-License-Identifier: GPL-2.0-only
///
/// Zero-length and one-element arrays are deprecated, see
/// Documentation/process/deprecated.rst
/// Flexible-array members should be used instead.
///
//
// Confidence: High
// Copyright: (C) 2020 Denis Efremov ISPRAS.
// Comments:
// Options: --no-includes --include-headers
virtual context
virtual report
virtual org
virtual patch
@initialize:python@
@@
def relevant(positions):
for p in positions:
if "uapi" in p.file:
return False
return True
@r depends on !patch@
identifier name, array;
type T;
position p : script:python() { relevant(p) };
@@
(
struct name {
...
* T array@p[\(0\|1\)];
};
|
struct {
...
* T array@p[\(0\|1\)];
};
|
union name {
...
* T array@p[\(0\|1\)];
};
|
union {
...
* T array@p[\(0\|1\)];
};
)
@depends on patch@
identifier name, array;
type T;
position p : script:python() { relevant(p) };
@@
(
struct name {
...
T array@p[
- 0
];
};
|
struct {
...
T array@p[
- 0
];
};
)
@script: python depends on report@
p << r.p;
@@
msg = "WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)"
coccilib.report.print_report(p[0], msg)
@script: python depends on org@
p << r.p;
@@
msg = "WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)"
coccilib.org.print_todo(p[0], msg)

51
scripts/coccinelle/misc/uninitialized_var.cocci Normal file
View File

@ -0,0 +1,51 @@
// SPDX-License-Identifier: GPL-2.0-only
///
/// Please, don't reintroduce uninitialized_var().
/// From Documentation/process/deprecated.rst:
/// For any compiler warnings about uninitialized variables, just add
/// an initializer. Using warning-silencing tricks is dangerous as it
/// papers over real bugs (or can in the future), and suppresses unrelated
/// compiler warnings (e.g. "unused variable"). If the compiler thinks it
/// is uninitialized, either simply initialize the variable or make compiler
/// changes. Keep in mind that in most cases, if an initialization is
/// obviously redundant, the compiler's dead-store elimination pass will make
/// sure there are no needless variable writes.
///
// Confidence: High
// Copyright: (C) 2020 Denis Efremov ISPRAS
// Options: --no-includes --include-headers
//
virtual context
virtual report
virtual org
@r@
identifier var;
type T;
position p;
@@
(
* T var =@p var;
|
* T var =@p *(&(var));
|
* var =@p var
|
* var =@p *(&(var))
)
@script:python depends on report@
p << r.p;
@@
coccilib.report.print_report(p[0],
"WARNING this kind of initialization is deprecated (https://www.kernel.org/doc/html/latest/process/deprecated.html#uninitialized-var)")
@script:python depends on org@
p << r.p;
@@
coccilib.org.print_todo(p[0],
"WARNING this kind of initialization is deprecated (https://www.kernel.org/doc/html/latest/process/deprecated.html#uninitialized-var)")