block: ratelimit handle_bad_sector() message

[ Upstream commit f4ac712e4fe009635344b9af5d890fe25fcc8c0d ]

syzbot is reporting unkillable task [1], for the caller is failing to
handle a corrupted filesystem image which attempts to access beyond
the end of the device. While we need to fix the caller, flooding the
console with handle_bad_sector() message is unlikely useful.

[1] https://syzkaller.appspot.com/bug?id=f1f49fb971d7a3e01bd8ab8cff2ff4572ccf3092

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/block/blk-core.c b/block/blk-core.c
index 619a3dcd3f5e7d1e3b097e3216dbb50d6a6990da..8d6435b73118615dcd5c8b18fce9db2f75ebdbfd 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -798,11 +798,10 @@ static void handle_bad_sector(struct bio *bio, sector_t maxsector)
 {
        char b[BDEVNAME_SIZE];
 
-       printk(KERN_INFO "attempt to access beyond end of device\n");
-       printk(KERN_INFO "%s: rw=%d, want=%Lu, limit=%Lu\n",
-                       bio_devname(bio, b), bio->bi_opf,
-                       (unsigned long long)bio_end_sector(bio),
-                       (long long)maxsector);
+       pr_info_ratelimited("attempt to access beyond end of device\n"
+                           "%s: rw=%d, want=%llu, limit=%llu\n",
+                           bio_devname(bio, b), bio->bi_opf,
+                           bio_end_sector(bio), maxsector);
 }
 
 #ifdef CONFIG_FAIL_MAKE_REQUEST