Replace one-element array with flexible-array member in struct sgmap and refactor the rest of the code, accordingly. Issue found with the help of Coccinelle and audited and fixed, manually. 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 | 24 ++++++++++-------------- drivers/scsi/aacraid/aacraid.h | 2 +- drivers/scsi/aacraid/commctrl.c | 4 ++-- drivers/scsi/aacraid/comminit.c | 3 +-- 4 files changed, 14 insertions(+), 19 deletions(-) diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c index 03ba974f6b2a..b2849e5cc104 100644 --- a/drivers/scsi/aacraid/aachba.c +++ b/drivers/scsi/aacraid/aachba.c @@ -1336,8 +1336,7 @@ static int aac_read_block(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u32 if (ret < 0) return ret; fibsize = sizeof(struct aac_read) + - ((le32_to_cpu(readcmd->sg.count) - 1) * - sizeof (struct sgentry)); + le32_to_cpu(readcmd->sg.count) * sizeof(struct sgentry); BUG_ON (fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr))); /* @@ -1471,8 +1470,7 @@ static int aac_write_block(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u3 if (ret < 0) return ret; fibsize = sizeof(struct aac_write) + - ((le32_to_cpu(writecmd->sg.count) - 1) * - sizeof (struct sgentry)); + le32_to_cpu(writecmd->sg.count) * sizeof(struct sgentry); BUG_ON (fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr))); /* @@ -1590,9 +1588,9 @@ static int aac_scsi_64(struct fib * fib, struct scsi_cmnd * cmd) /* * Build Scatter/Gather list */ - fibsize = sizeof (struct aac_srb) - sizeof (struct sgentry) + - ((le32_to_cpu(srbcmd->sg.count) & 0xff) * - sizeof (struct sgentry64)); + fibsize = sizeof(struct aac_srb) + + (le32_to_cpu(srbcmd->sg.count) & 0xff) * + sizeof(struct sgentry64); BUG_ON (fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr))); @@ -1621,9 +1619,9 @@ static int aac_scsi_32(struct fib * fib, struct scsi_cmnd * cmd) /* * Build Scatter/Gather list */ - fibsize = sizeof (struct aac_srb) + - (((le32_to_cpu(srbcmd->sg.count) & 0xff) - 1) * - sizeof (struct sgentry)); + fibsize = sizeof(struct aac_srb) + + (le32_to_cpu(srbcmd->sg.count) & 0xff) * + sizeof(struct sgentry); BUG_ON (fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr))); @@ -1691,8 +1689,7 @@ static int aac_send_safw_bmic_cmd(struct aac_dev *dev, fibptr->hw_fib_va->header.XferState &= ~cpu_to_le32(FastResponseCapable); - fibsize = sizeof(struct aac_srb) - sizeof(struct sgentry) + - sizeof(struct sgentry64); + fibsize = sizeof(struct aac_srb) + sizeof(struct sgentry64); /* allocate DMA buffer for response */ addr = dma_map_single(&dev->pdev->dev, xfer_buf, xfer_len, @@ -2264,8 +2261,7 @@ int aac_get_adapter_info(struct aac_dev* dev) dev->a_ops.adapter_bounds = aac_bounds_32; dev->scsi_host_ptr->sg_tablesize = (dev->max_fib_size - sizeof(struct aac_fibhdr) - - sizeof(struct aac_write) + sizeof(struct sgentry)) / - sizeof(struct sgentry); + sizeof(struct aac_write)) / sizeof(struct sgentry); if (dev->dac_support) { dev->a_ops.adapter_read = aac_read_block64; dev->a_ops.adapter_write = aac_write_block64; diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h index 94eb83d38be6..3fbc22ae72b6 100644 --- a/drivers/scsi/aacraid/aacraid.h +++ b/drivers/scsi/aacraid/aacraid.h @@ -507,7 +507,7 @@ struct sge_ieee1212 { struct sgmap { __le32 count; - struct sgentry sg[1]; + struct sgentry sg[]; }; struct user_sgmap { diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c index e7cc927ed952..df811ad4afaa 100644 --- a/drivers/scsi/aacraid/commctrl.c +++ b/drivers/scsi/aacraid/commctrl.c @@ -561,8 +561,8 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg) rcode = -EINVAL; goto cleanup; } - actual_fibsize = sizeof(struct aac_srb) - sizeof(struct sgentry) + - ((user_srbcmd->sg.count & 0xff) * sizeof(struct sgentry)); + actual_fibsize = sizeof(struct aac_srb) + + (user_srbcmd->sg.count & 0xff) * sizeof(struct sgentry); actual_fibsize64 = actual_fibsize + (user_srbcmd->sg.count & 0xff) * (sizeof(struct sgentry64) - sizeof(struct sgentry)); /* User made a mistake - should not continue */ diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c index bd99c5492b7d..d8dd89c87b01 100644 --- a/drivers/scsi/aacraid/comminit.c +++ b/drivers/scsi/aacraid/comminit.c @@ -523,8 +523,7 @@ struct aac_dev *aac_init_adapter(struct aac_dev *dev) dev->max_fib_size = sizeof(struct hw_fib); dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size - sizeof(struct aac_fibhdr) - - sizeof(struct aac_write) + sizeof(struct sgentry)) - / sizeof(struct sgentry); + - sizeof(struct aac_write)) / sizeof(struct sgentry); dev->comm_interface = AAC_COMM_PRODUCER; dev->raw_io_interface = dev->raw_io_64 = 0; -- 2.34.1
