On Wed, Jun 28, 2023 at 11:57:30AM -0600, Gustavo A. R. Silva wrote: > Replace one-element array with flexible-array member in struct > sgmap64 and refactor the rest of the code, accordingly. > > Issue found with the help of Coccinelle and audited and fixed, > manually. Like with the sgmap patch, I see (expected) binary differences in aac_write_block64() and aac_read_block64() due to the simplified calculations. I don't see anything unaccounted for, so: 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 | 9 +++------ > drivers/scsi/aacraid/aacraid.h | 2 +- > 2 files changed, 4 insertions(+), 7 deletions(-) > > diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c > index b2849e5cc104..90df697e7c5f 100644 > --- a/drivers/scsi/aacraid/aachba.c > +++ b/drivers/scsi/aacraid/aachba.c > @@ -1301,8 +1301,7 @@ static int aac_read_block64(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u > if (ret < 0) > return ret; > fibsize = sizeof(struct aac_read64) + > - ((le32_to_cpu(readcmd->sg.count) - 1) * > - sizeof (struct sgentry64)); > + le32_to_cpu(readcmd->sg.count) * sizeof(struct sgentry64); > BUG_ON (fibsize > (fib->dev->max_fib_size - > sizeof(struct aac_fibhdr))); > /* > @@ -1433,8 +1432,7 @@ static int aac_write_block64(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, > if (ret < 0) > return ret; > fibsize = sizeof(struct aac_write64) + > - ((le32_to_cpu(writecmd->sg.count) - 1) * > - sizeof (struct sgentry64)); > + le32_to_cpu(writecmd->sg.count) * sizeof(struct sgentry64); > BUG_ON (fibsize > (fib->dev->max_fib_size - > sizeof(struct aac_fibhdr))); > /* > @@ -2271,8 +2269,7 @@ int aac_get_adapter_info(struct aac_dev* dev) > dev->scsi_host_ptr->sg_tablesize = > (dev->max_fib_size - > sizeof(struct aac_fibhdr) - > - sizeof(struct aac_write64) + > - sizeof(struct sgentry64)) / > + sizeof(struct aac_write64)) / > sizeof(struct sgentry64); > } else { > dev->a_ops.adapter_read = aac_read_block; > diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h > index 3fbc22ae72b6..fb3d93e4a99e 100644 > --- a/drivers/scsi/aacraid/aacraid.h > +++ b/drivers/scsi/aacraid/aacraid.h > @@ -517,7 +517,7 @@ struct user_sgmap { > > struct sgmap64 { > __le32 count; > - struct sgentry64 sg[1]; > + struct sgentry64 sg[]; > }; > > struct user_sgmap64 { > -- > 2.34.1 > -- Kees Cook
