Replace the deprecated[1] use of 1-element arrays in struct sgmap, struct sgmap64, struct sgmapraw, struct user_sgmap, and struct user_sgmap64 with modern flexible arrays. Additionally remove struct user_sgmapraw as it is unused. The resulting binary output differences from this change are limited only to stack space consumption of the smaller "srbu" variable in aac_issue_safw_bmic_identify() and aac_get_safw_ciss_luns(), as well as the smaller associated pair of memcpy()s in aac_send_safw_bmic_cmd(). Artificially growing the size of srbu back to its prior size removes all binary differences[2]. As an aside, after studying the aacraid driver code I wonder how aac_send_wellness_command() ever works. It is reporting a size 4 bytes too small for what it has constructed in memory in the DMA region: sgentry64 is size 12, whereas sgentry is size 8. Perhaps the hardware doesn't care. (Regardless, it is unchanged by this patch.) Link: https://github.com/KSPP/linux/issues/79 [1] Link: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?h=dev/v6.10-rc2/1-element&id=45e6226bcbc5e982541754eca7ac29f403e82f5e [2] Signed-off-by: Kees Cook <kees@xxxxxxxxxx> --- Cc: Adaptec OEM Raid Solutions <aacraid@xxxxxxxxxxxxx> Cc: "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> Cc: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx> Cc: linux-scsi@xxxxxxxxxxxxxxx --- drivers/scsi/aacraid/aachba.c | 26 ++++++++++++-------------- drivers/scsi/aacraid/aacraid.h | 15 +++++---------- drivers/scsi/aacraid/commctrl.c | 4 ++-- drivers/scsi/aacraid/comminit.c | 3 +-- drivers/scsi/aacraid/commsup.c | 5 +++-- 5 files changed, 23 insertions(+), 30 deletions(-) diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c index 497c6dd5df91..ec3834bda111 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))); @@ -1302,7 +1302,7 @@ 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) * + (le32_to_cpu(readcmd->sg.count) * sizeof (struct sgentry64)); BUG_ON (fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr))); @@ -1337,7 +1337,7 @@ 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) * + (le32_to_cpu(readcmd->sg.count) * sizeof (struct sgentry)); 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))); @@ -1436,7 +1436,7 @@ 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) * + (le32_to_cpu(writecmd->sg.count) * sizeof (struct sgentry64)); BUG_ON (fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr))); @@ -1473,7 +1473,7 @@ 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) * + (le32_to_cpu(writecmd->sg.count) * sizeof (struct sgentry)); BUG_ON (fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr))); @@ -1592,9 +1592,9 @@ static int aac_scsi_64(struct fib * fib, struct scsi_cmnd * cmd) /* * Build Scatter/Gather list */ - fibsize = sizeof (struct aac_srb) - sizeof (struct sgentry) + + fibsize = sizeof(struct aac_srb) + ((le32_to_cpu(srbcmd->sg.count) & 0xff) * - sizeof (struct sgentry64)); + sizeof(struct sgentry64)); BUG_ON (fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr))); @@ -1624,7 +1624,7 @@ 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) * + ((le32_to_cpu(srbcmd->sg.count) & 0xff) * sizeof (struct sgentry)); BUG_ON (fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr))); @@ -1693,8 +1693,7 @@ 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, @@ -2267,7 +2266,7 @@ 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 aac_write)) / sizeof(struct sgentry); if (dev->dac_support) { dev->a_ops.adapter_read = aac_read_block64; @@ -2278,8 +2277,7 @@ 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 8e7a0a5cb7aa..1d09d3ac6aa4 100644 --- a/drivers/scsi/aacraid/aacraid.h +++ b/drivers/scsi/aacraid/aacraid.h @@ -507,32 +507,27 @@ struct sge_ieee1212 { struct sgmap { __le32 count; - struct sgentry sg[1]; + struct sgentry sg[]; }; struct user_sgmap { u32 count; - struct user_sgentry sg[1]; + struct user_sgentry sg[]; }; struct sgmap64 { __le32 count; - struct sgentry64 sg[1]; + struct sgentry64 sg[]; }; struct user_sgmap64 { u32 count; - struct user_sgentry64 sg[1]; + struct user_sgentry64 sg[]; }; struct sgmapraw { __le32 count; - struct sgentryraw sg[1]; -}; - -struct user_sgmapraw { - u32 count; - struct user_sgentryraw sg[1]; + struct sgentryraw sg[]; }; struct creation_info diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c index e7cc927ed952..68240d6f27ab 100644 --- a/drivers/scsi/aacraid/commctrl.c +++ b/drivers/scsi/aacraid/commctrl.c @@ -523,7 +523,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg) goto cleanup; } - if ((fibsize < (sizeof(struct user_aac_srb) - sizeof(struct user_sgentry))) || + if ((fibsize < sizeof(struct user_aac_srb)) || (fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr)))) { rcode = -EINVAL; goto cleanup; @@ -561,7 +561,7 @@ 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) + + 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)); diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c index bd99c5492b7d..fee857236991 100644 --- a/drivers/scsi/aacraid/comminit.c +++ b/drivers/scsi/aacraid/comminit.c @@ -522,8 +522,7 @@ struct aac_dev *aac_init_adapter(struct aac_dev *dev) spin_lock_init(&dev->iq_lock); 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 aac_fibhdr) - sizeof(struct aac_write)) / sizeof(struct sgentry); dev->comm_interface = AAC_COMM_PRODUCER; dev->raw_io_interface = dev->raw_io_64 = 0; diff --git a/drivers/scsi/aacraid/commsup.c b/drivers/scsi/aacraid/commsup.c index 25cee03d7f97..47287559c768 100644 --- a/drivers/scsi/aacraid/commsup.c +++ b/drivers/scsi/aacraid/commsup.c @@ -2327,8 +2327,9 @@ static int aac_send_wellness_command(struct aac_dev *dev, char *wellness_str, sg64->sg[0].addr[0] = cpu_to_le32((u32)(addr & 0xffffffff)); sg64->sg[0].count = cpu_to_le32(datasize); - ret = aac_fib_send(ScsiPortCommand64, fibptr, sizeof(struct aac_srb), - FsaNormal, 1, 1, NULL, NULL); + ret = aac_fib_send(ScsiPortCommand64, fibptr, + sizeof(struct aac_srb) + sizeof(struct sgentry), + FsaNormal, 1, 1, NULL, NULL); dma_free_coherent(&dev->pdev->dev, datasize, dma_buf, addr); -- 2.34.1
