From: Jia-Ju Bai baijiaju1990@gmail.com
mainline inclusion from v5.19-rc1 commit 40f567bbb3b0639d2ec7d1c6ad4b1b018f80cf19 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I59A5L?from=project-issue CVE: N/A
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The function kzalloc() in detached_dev_do_request() can fail, so its return value should be checked.
Fixes: bc082a55d25c ("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 Reviewed-by: Jason Yan yanaijie@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/md/bcache/request.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c index 19014a87a7db..c1a1bd7aa9ec 100644 --- a/drivers/md/bcache/request.c +++ b/drivers/md/bcache/request.c @@ -1104,6 +1104,12 @@ static void detached_dev_do_request(struct bcache_device *d, struct bio *bio) * which would call closure_get(&dc->disk.cl) */ ddip = kzalloc(sizeof(struct detached_dev_io_private), GFP_NOIO); + if (!ddip) { + bio->bi_status = BLK_STS_RESOURCE; + bio->bi_end_io(bio); + return; + } + ddip->d = d; /* Count on the bcache device */ ddip->start_time = part_start_io_acct(d->disk, &ddip->part, bio);