| Message ID | Y7zBtCZ/eRJCpjBf@work (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [next] cifs: Replace zero-length arrays with flexible-array members | expand |
On Mon, Jan 09, 2023 at 07:39:00PM -0600, Gustavo A. R. Silva wrote: > Zero-length arrays are deprecated[1] and we are moving towards > adopting C99 flexible-array members instead. So, replace zero-length > arrays in a couple of structures with flex-array members. > > This helps with the ongoing efforts to tighten the FORTIFY_SOURCE > routines on memcpy() and help us make progress towards globally > enabling -fstrict-flex-arrays=3 [2]. > > Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays [1] > Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [2] > Link: https://github.com/KSPP/linux/issues/78 > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org>
merged into cifs-2.6.git for-next On Thu, Jan 12, 2023 at 4:52 PM Kees Cook <keescook@chromium.org> wrote: > > On Mon, Jan 09, 2023 at 07:39:00PM -0600, Gustavo A. R. Silva wrote: > > Zero-length arrays are deprecated[1] and we are moving towards > > adopting C99 flexible-array members instead. So, replace zero-length > > arrays in a couple of structures with flex-array members. > > > > This helps with the ongoing efforts to tighten the FORTIFY_SOURCE > > routines on memcpy() and help us make progress towards globally > > enabling -fstrict-flex-arrays=3 [2]. > > > > Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays [1] > > Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [2] > > Link: https://github.com/KSPP/linux/issues/78 > > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> > > Reviewed-by: Kees Cook <keescook@chromium.org> > > -- > Kees Cook
diff --git a/fs/cifs/ntlmssp.h b/fs/cifs/ntlmssp.h index 55758b9ec877..2c5dde2ece58 100644 --- a/fs/cifs/ntlmssp.h +++ b/fs/cifs/ntlmssp.h @@ -83,7 +83,7 @@ typedef struct _NEGOTIATE_MESSAGE { SECURITY_BUFFER WorkstationName; /* RFC 1001 and ASCII */ /* SECURITY_BUFFER for version info not present since we do not set the version is present flag */ - char DomainString[0]; + char DomainString[]; /* followed by WorkstationString */ } __attribute__((packed)) NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE; @@ -135,7 +135,7 @@ typedef struct _AUTHENTICATE_MESSAGE { __le32 NegotiateFlags; /* SECURITY_BUFFER for version info not present since we do not set the version is present flag */ - char UserString[0]; + char UserString[]; } __attribute__((packed)) AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE; /*
Zero-length arrays are deprecated[1] and we are moving towards adopting C99 flexible-array members instead. So, replace zero-length arrays in a couple of structures with flex-array members. This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines on memcpy() and help us make progress towards globally enabling -fstrict-flex-arrays=3 [2]. Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays [1] Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [2] Link: https://github.com/KSPP/linux/issues/78 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> --- fs/cifs/ntlmssp.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)