6.1-stable review patch. If anyone has any objections, please let me know.
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From: Martin Wilck mwilck@suse.com
commit f81eaf08385ddd474a2f41595a7757502870c0eb upstream.
Ff the device returns page 0xb1 with length 8 (happens with qemu v2.x, for example), sd_read_block_characteristics() may attempt an out-of-bounds memory access when accessing the zoned field at offset 8.
Fixes: 7fb019c46eee ("scsi: sd: Switch to using scsi_device VPD pages") Cc: stable@vger.kernel.org Signed-off-by: Martin Wilck mwilck@suse.com Link: https://lore.kernel.org/r/20240912134308.282824-1-mwilck@suse.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/scsi/sd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -2998,7 +2998,7 @@ static void sd_read_block_characteristic rcu_read_lock(); vpd = rcu_dereference(sdkp->device->vpd_pgb1);
- if (!vpd || vpd->len < 8) { + if (!vpd || vpd->len <= 8) { rcu_read_unlock(); return; }