[merged] lib-ts_fsm-replace-zero-length-array-with-flexible-array-member.patch removed from -mm tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



The patch titled
     Subject: lib/ts_fsm.c: replace zero-length array with flexible-array member
has been removed from the -mm tree.  Its filename was
     lib-ts_fsm-replace-zero-length-array-with-flexible-array-member.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
From: "Gustavo A. R. Silva" <gustavo@xxxxxxxxxxxxxx>
Subject: lib/ts_fsm.c: replace zero-length array with flexible-array member

The current codebase makes use of the zero-length array language extension
to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:

struct foo {
        int stuff;
        struct boo array[];
};

By making use of the mechanism above, we will get a compiler warning in
case the flexible array does not occur last in the structure, which will
help us prevent some kind of undefined behavior bugs from being
inadvertenly introduced[3] to the codebase from now on.

This issue was found with the help of Coccinelle.

[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour")

Link: http://lkml.kernel.org/r/20200211205813.GA25602@embeddedor
Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 lib/ts_fsm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/ts_fsm.c~lib-ts_fsm-replace-zero-length-array-with-flexible-array-member
+++ a/lib/ts_fsm.c
@@ -32,7 +32,7 @@
 struct ts_fsm
 {
 	unsigned int		ntokens;
-	struct ts_fsm_token	tokens[0];
+	struct ts_fsm_token	tokens[];
 };
 
 /* other values derived from ctype.h */
_

Patches currently in -mm which might be from gustavo@xxxxxxxxxxxxxx are





[Index of Archives]     [Kernel Archive]     [IETF Annouce]     [DCCP]     [Netdev]     [Networking]     [Security]     [Bugtraq]     [Yosemite]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux SCSI]

  Powered by Linux