From 34bd9c1c4f62e936d8865e6442f332cd85bdfc95 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bart.vanassche@wdc.com>
Date: Wed, 21 Jun 2017 10:55:46 -0700
Subject: [PATCH] block: Fix off-by-one errors in blk_status_to_errno() and
print_req_error()
Git-commit: 34bd9c1c4f62e936d8865e6442f332cd85bdfc95
Patch-mainline: v4.13-rc1
References: fate#322738,fate#322919,fate#322950,fate#323773
This was detected by the smatch static analyzer.
Fixes: commit 2a842acab109 ("block: introduce new block status code type")
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Coly Li <colyli@suse.de>
---
block/blk-core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 2e02314ea331..3c18ea60cb1c 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -169,7 +169,7 @@ int blk_status_to_errno(blk_status_t status)
{
int idx = (__force int)status;
- if (WARN_ON_ONCE(idx > ARRAY_SIZE(blk_errors)))
+ if (WARN_ON_ONCE(idx >= ARRAY_SIZE(blk_errors)))
return -EIO;
return blk_errors[idx].errno;
}
@@ -179,7 +179,7 @@ static void print_req_error(struct request *req, blk_status_t status)
{
int idx = (__force int)status;
- if (WARN_ON_ONCE(idx > ARRAY_SIZE(blk_errors)))
+ if (WARN_ON_ONCE(idx >= ARRAY_SIZE(blk_errors)))
return;
printk_ratelimited(KERN_ERR "%s: %s error, dev %s, sector %llu\n",
--
2.13.1