diff options
| author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2017-11-10 19:15:02 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2017-11-20 20:18:39 -0500 |
| commit | 06feb5d0bf9953c6918d0e35feef64521c5236c4 (patch) | |
| tree | 2ffbfadecf15c2549e5a58524aba9f4ff1819102 /scripts/coccinelle/free | |
| parent | 8a28caf02b7763f3d0b3813805ecd3ede0589c73 (diff) | |
scripts/coccinelle: add some more coccinelle tests
Add some useful static code analysis scripts for coccinelle
copied from the Linux kernel v4.14-rc8:
Warn on check against NULL before calling free.
scripts/coccinelle/free/ifnullfree.cocci
Detect superfluous NULL check for list iterator.
scripts/coccinelle/iterators/itnull.cocci
Check if list iterator is reassigned.
scripts/coccinelle/iterators/list_entry_update.cocci
Check if list iterator is used after loop.
scripts/coccinelle/iterators/use_after_iter.cocci
Find wrong argument of sizeof in allocation function:
scripts/coccinelle/misc/badty.cocci
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Diffstat (limited to 'scripts/coccinelle/free')
| -rw-r--r-- | scripts/coccinelle/free/ifnullfree.cocci | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/scripts/coccinelle/free/ifnullfree.cocci b/scripts/coccinelle/free/ifnullfree.cocci new file mode 100644 index 0000000000..14a4cd98e8 --- /dev/null +++ b/scripts/coccinelle/free/ifnullfree.cocci @@ -0,0 +1,59 @@ +/// NULL check before some freeing functions is not needed. +/// +/// Based on checkpatch warning +/// "kfree(NULL) is safe this check is probably not required" +/// and kfreeaddr.cocci by Julia Lawall. +/// +// Copyright: (C) 2014 Fabian Frederick. GPLv2. +// Comments: - +// Options: --no-includes --include-headers + +virtual patch +virtual org +virtual report +virtual context + +@r2 depends on patch@ +expression E; +@@ +- if (E != NULL) +( + kfree(E); +| + kzfree(E); +| + debugfs_remove(E); +| + debugfs_remove_recursive(E); +| + usb_free_urb(E); +| + kmem_cache_destroy(E); +| + mempool_destroy(E); +| + dma_pool_destroy(E); +) + +@r depends on context || report || org @ +expression E; +position p; +@@ + +* if (E != NULL) +* \(kfree@p\|kzfree@p\|debugfs_remove@p\|debugfs_remove_recursive@p\| +* usb_free_urb@p\|kmem_cache_destroy@p\|mempool_destroy@p\| +* dma_pool_destroy@p\)(E); + +@script:python depends on org@ +p << r.p; +@@ + +cocci.print_main("NULL check before that freeing function is not needed", p) + +@script:python depends on report@ +p << r.p; +@@ + +msg = "WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values." +coccilib.report.print_report(p[0], msg) |