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// 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)
|
