On Wed, Jun 28, 2023 at 11:56:12AM -0600, Gustavo A. R. Silva wrote: > Replace one-element array with flexible-array member in struct > sgmapraw. > > Issue found with the help of Coccinelle and audited and fixed, > manually. As with the other two, I see expected binary changes in aac_read_raw_io() and aac_write_raw_io() due to the simplified count calculations. Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> -Kees > > Link: https://github.com/KSPP/linux/issues/79 > Link: https://github.com/ClangBuiltLinux/linux/issues/1851 > Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx> > --- > drivers/scsi/aacraid/aachba.c | 4 ++-- > drivers/scsi/aacraid/aacraid.h | 2 +- > 2 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c > index fff0550e02e4..b3c0c2255e55 100644 > --- a/drivers/scsi/aacraid/aachba.c > +++ b/drivers/scsi/aacraid/aachba.c > @@ -1267,7 +1267,7 @@ static int aac_read_raw_io(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u3 > return ret; > command = ContainerRawIo; > fibsize = sizeof(struct aac_raw_io) + > - ((le32_to_cpu(readcmd->sg.count)-1) * sizeof(struct sgentryraw)); > + le32_to_cpu(readcmd->sg.count) * sizeof(struct sgentryraw); > } > > BUG_ON(fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr))); > @@ -1401,7 +1401,7 @@ static int aac_write_raw_io(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u > return ret; > command = ContainerRawIo; > fibsize = sizeof(struct aac_raw_io) + > - ((le32_to_cpu(writecmd->sg.count)-1) * sizeof (struct sgentryraw)); > + le32_to_cpu(writecmd->sg.count) * sizeof(struct sgentryraw); > } > > BUG_ON(fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr))); > diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h > index d1fc1ce2e36d..87015dd2abd9 100644 > --- a/drivers/scsi/aacraid/aacraid.h > +++ b/drivers/scsi/aacraid/aacraid.h > @@ -527,7 +527,7 @@ struct user_sgmap64 { > > struct sgmapraw { > __le32 count; > - struct sgentryraw sg[1]; > + struct sgentryraw sg[]; > }; > > struct user_sgmapraw { > -- > 2.34.1 > -- Kees Cook
