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| author | Damien Le Moal <damien.lemoal@wdc.com> | 2018-10-12 13:08:42 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-10-25 20:17:40 +0300 |
| commit | 5f832a395859de7191e638e3777ae57f37d46d08 (patch) | |
| tree | 54acd5b024436bdffffeee21e11e0783d254d624 /drivers/scsi/sd_zbc.c | |
| parent | d2e428e49eec9b7ff175d7d5941d50e5a7d15324 (diff) | |
| download | linux-5f832a395859de7191e638e3777ae57f37d46d08.tar.xz | |
scsi: sd_zbc: Fix sd_zbc_check_zones() error checks
The unsigned 32 bits overflow check for the zone size value is already
done within sd_zbc_check_zones() with the test:
} else if (logical_to_sectors(sdkp->device, zone_blocks) > UINT_MAX) {
so there is no need to check again for an out of range value in
sd_zbc_read_zones(). Simplify the code and fix sd_zbc_check_zones()
error return to -EFBIG instead of -ENODEV if the zone size is too large.
Change the return type of sd_zbc_check_zones() to an int for the error
code and return the zone size (zone_blocks) through a u32 pointer to
avoid overflowing the signed 32 return value.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/scsi/sd_zbc.c')
| -rw-r--r-- | drivers/scsi/sd_zbc.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c index ca73c46931c0..0678e1e108b0 100644 --- a/drivers/scsi/sd_zbc.c +++ b/drivers/scsi/sd_zbc.c @@ -373,7 +373,7 @@ static int sd_zbc_check_zoned_characteristics(struct scsi_disk *sdkp, * Returns the zone size in number of blocks upon success or an error code * upon failure. */ -static s64 sd_zbc_check_zones(struct scsi_disk *sdkp) +static int sd_zbc_check_zones(struct scsi_disk *sdkp, u32 *zblocks) { u64 zone_blocks = 0; sector_t max_lba, block = 0; @@ -381,7 +381,7 @@ static s64 sd_zbc_check_zones(struct scsi_disk *sdkp) unsigned char *rec; unsigned int buf_len; unsigned int list_length; - s64 ret; + int ret; u8 same; /* Get a buffer */ @@ -472,9 +472,10 @@ out: if (sdkp->first_scan) sd_printk(KERN_NOTICE, sdkp, "Zone size too large\n"); - ret = -ENODEV; + ret = -EFBIG; } else { - ret = zone_blocks; + *zblocks = zone_blocks; + ret = 0; } out_free: @@ -668,7 +669,7 @@ err: int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf) { - int64_t zone_blocks; + u32 zone_blocks; int ret; if (!sd_is_zoned(sdkp)) @@ -687,12 +688,8 @@ int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf) * Check zone size: only devices with a constant zone size (except * an eventual last runt zone) that is a power of 2 are supported. */ - zone_blocks = sd_zbc_check_zones(sdkp); - ret = -EFBIG; - if (zone_blocks != (u32)zone_blocks) - goto err; - ret = zone_blocks; - if (ret < 0) + ret = sd_zbc_check_zones(sdkp, &zone_blocks); + if (ret != 0) goto err; /* The drive satisfies the kernel restrictions: set it up */ |