From: Eric Wong <e@80x24.org>
To: Junio C Hamano <gitster@pobox.com>
Cc: git@vger.kernel.org, Derrick Stolee <stolee@gmail.com>,
Johannes Schindelin <Johannes.Schindelin@gmx.de>,
Phillip Wood <phillip.wood123@gmail.com>
Subject: [PATCH v3 02/20] coccicheck: detect hashmap_entry.hash assignment
Date: Sun, 6 Oct 2019 23:30:25 +0000 [thread overview]
Message-ID: <20191006233043.3516-3-e@80x24.org> (raw)
In-Reply-To: <20191006233043.3516-1-e@80x24.org>
Assigning hashmap_entry.hash manually leaves hashmap_entry.next
uninitialized, which can be dangerous once the hashmap_entry is
inserted into a hashmap. Detect those assignments and use
hashmap_entry_init, instead.
Signed-off-by: Eric Wong <e@80x24.org>
Reviewed-by: Derrick Stolee <stolee@gmail.com>
---
contrib/coccinelle/hashmap.cocci | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
create mode 100644 contrib/coccinelle/hashmap.cocci
diff --git a/contrib/coccinelle/hashmap.cocci b/contrib/coccinelle/hashmap.cocci
new file mode 100644
index 0000000000..d69e120ccf
--- /dev/null
+++ b/contrib/coccinelle/hashmap.cocci
@@ -0,0 +1,16 @@
+@ hashmap_entry_init_usage @
+expression E;
+struct hashmap_entry HME;
+@@
+- HME.hash = E;
++ hashmap_entry_init(&HME, E);
+
+@@
+identifier f !~ "^hashmap_entry_init$";
+expression E;
+struct hashmap_entry *HMEP;
+@@
+ f(...) {<...
+- HMEP->hash = E;
++ hashmap_entry_init(HMEP, E);
+ ...>}
next prev parent reply other threads:[~2019-10-06 23:30 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-06 23:30 [PATCH v3 00/20] hashmap bug/safety/ease-of-use fixes Eric Wong
2019-10-06 23:30 ` [PATCH v3 01/20] diff: use hashmap_entry_init on moved_entry.ent Eric Wong
2019-10-06 23:30 ` Eric Wong [this message]
2019-10-06 23:30 ` [PATCH v3 03/20] packfile: use hashmap_entry in delta_base_cache_entry Eric Wong
2019-10-06 23:30 ` [PATCH v3 04/20] hashmap_entry_init takes "struct hashmap_entry *" Eric Wong
2019-10-06 23:30 ` [PATCH v3 05/20] hashmap_get_next takes "const struct " Eric Wong
2019-10-06 23:30 ` [PATCH v3 06/20] hashmap_add takes "struct " Eric Wong
2019-10-06 23:30 ` [PATCH v3 07/20] hashmap_get takes "const struct " Eric Wong
2019-10-06 23:30 ` [PATCH v3 08/20] hashmap_remove " Eric Wong
2019-10-06 23:30 ` [PATCH v3 09/20] hashmap_put takes "struct " Eric Wong
2019-10-06 23:30 ` [PATCH v3 10/20] introduce container_of macro Eric Wong
2019-10-06 23:30 ` [PATCH v3 11/20] hashmap_get_next returns "struct hashmap_entry *" Eric Wong
2019-10-06 23:30 ` [PATCH v3 12/20] hashmap: use *_entry APIs to wrap container_of Eric Wong
2019-10-06 23:30 ` [PATCH v3 13/20] hashmap_get{,_from_hash} return "struct hashmap_entry *" Eric Wong
2019-10-06 23:30 ` [PATCH v3 14/20] hashmap_cmp_fn takes hashmap_entry params Eric Wong
2019-10-06 23:30 ` [PATCH v3 15/20] hashmap: use *_entry APIs for iteration Eric Wong
2019-10-06 23:30 ` [PATCH v3 16/20] hashmap: hashmap_{put,remove} return hashmap_entry * Eric Wong
2019-10-06 23:30 ` [PATCH v3 17/20] hashmap: introduce hashmap_free_entries Eric Wong
2019-10-06 23:30 ` [PATCH v3 18/20] OFFSETOF_VAR macro to simplify hashmap iterators Eric Wong
2019-10-06 23:30 ` [PATCH v3 19/20] hashmap: remove type arg from hashmap_{get,put,remove}_entry Eric Wong
2019-10-06 23:30 ` [PATCH v3 20/20] hashmap_entry: remove first member requirement from docs Eric Wong
2019-10-07 1:52 ` Junio C Hamano
2019-10-07 8:43 ` [PATCH v3 21/20] convert: drop invalid comment for subprocess_entry Eric Wong
2019-10-08 2:15 ` Junio C Hamano
2019-10-08 2:56 ` Eric Wong
2019-10-07 1:24 ` [PATCH v3 00/20] hashmap bug/safety/ease-of-use fixes Junio C Hamano
2019-10-08 8:58 ` Johannes Schindelin
2019-10-08 13:56 ` Derrick Stolee
2019-10-08 13:59 ` Derrick Stolee
2019-10-09 1:20 ` Junio C Hamano
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