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| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2020-02-12 02:21:48 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-12 21:59:11 +0300 |
| commit | 6a9746fb0b1bf79777b709dd9f045ded89c6b373 (patch) | |
| tree | aaaf97cd6c1c7c76d352f02ed3a6893092cb7e62 /drivers/usb/atm | |
| parent | d80bdabea98698f14f741600595b15db051c2bae (diff) | |
| download | linux-6a9746fb0b1bf79777b709dd9f045ded89c6b373.tar.xz | |
USB: atm: 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")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Link: https://lore.kernel.org/r/20200211232148.GA20644@embeddedor
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/atm')
| -rw-r--r-- | drivers/usb/atm/ueagle-atm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/atm/ueagle-atm.c b/drivers/usb/atm/ueagle-atm.c index 635cf0466b59..e9fed9a88737 100644 --- a/drivers/usb/atm/ueagle-atm.c +++ b/drivers/usb/atm/ueagle-atm.c @@ -350,7 +350,7 @@ struct l1_code { u8 string_header[E4_L1_STRING_HEADER]; u8 page_number_to_block_index[E4_MAX_PAGE_NUMBER]; struct block_index page_header[E4_NO_SWAPPAGE_HEADERS]; - u8 code[0]; + u8 code[]; } __packed; /* structures describing a block within a DSP page */ |