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Since these strings are expected to be NUL-terminated and the buffers
are exactly sized (in vnic_client_data_len()) with no padding, strncpy()
can be safely replaced with strscpy() here, as strncpy() on
NUL-terminated string is considered deprecated[1]. This has the
side-effect of silencing a -Warray-bounds warning due to the compiler
being confused about the vlcd incrementing:
In file included from ./include/linux/string.h:253,
from ./include/linux/bitmap.h:10,
from ./include/linux/cpumask.h:12,
from ./include/linux/mm_types_task.h:14,
from ./include/linux/mm_types.h:5,
from ./include/linux/buildid.h:5,
from ./include/linux/module.h:14,
from drivers/net/ethernet/ibm/ibmvnic.c:35:
In function '__fortify_strncpy',
inlined from 'vnic_add_client_data' at drivers/net/ethernet/ibm/ibmvnic.c:3919:2:
./include/linux/fortify-string.h:39:30: warning: '__builtin_strncpy' offset 12 from the object at 'v
lcd' is out of the bounds of referenced subobject 'name' with type 'char[]' at offset 12 [-Warray-bo
unds]
39 | #define __underlying_strncpy __builtin_strncpy
| ^
./include/linux/fortify-string.h:51:9: note: in expansion of macro '__underlying_strncpy'
51 | return __underlying_strncpy(p, q, size);
| ^~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/ibm/ibmvnic.c: In function 'vnic_add_client_data':
drivers/net/ethernet/ibm/ibmvnic.c:3883:7: note: subobject 'name' declared here
3883 | char name[];
| ^~~~
[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings
Cc: Dany Madden <drt@linux.ibm.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Cc: Thomas Falcon <tlfalcon@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.