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md: bcache: check the return value of kzalloc() in detached_dev_do_request()
commit40f567bbb3
upstream. The function kzalloc() in detached_dev_do_request() can fail, so its return value should be checked. Fixes:bc082a55d2
("bcache: fix inaccurate io state for detached bcache devices") Reported-by: TOTE Robot <oslab@tsinghua.edu.cn> Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: Coly Li <colyli@suse.de> Link: https://lore.kernel.org/r/20220527152818.27545-4-colyli@suse.de Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1105,6 +1105,12 @@ static void detached_dev_do_request(struct bcache_device *d, struct bio *bio,
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* which would call closure_get(&dc->disk.cl)
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*/
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ddip = kzalloc(sizeof(struct detached_dev_io_private), GFP_NOIO);
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if (!ddip) {
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bio->bi_status = BLK_STS_RESOURCE;
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bio->bi_end_io(bio);
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return;
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}
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ddip->d = d;
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/* Count on the bcache device */
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ddip->orig_bdev = orig_bdev;
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