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block: ratelimit handle_bad_sector() message 

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>
This commit is contained in:
Tetsuo Handa 2020-10-08 22:37:23 +09:00 committed by Jens Axboe
parent 1da30f952a
commit f4ac712e4f
1 changed files with 4 additions and 5 deletions
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9
block/blk-core.c
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@ -646,11 +646,10 @@ 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