From: Jia-Ju Bai baijiaju1990@gmail.com
commit 40f567bbb3b0639d2ec7d1c6ad4b1b018f80cf19 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/md/bcache/request.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/md/bcache/request.c +++ b/drivers/md/bcache/request.c @@ -1107,6 +1107,12 @@ static void detached_dev_do_request(stru * 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->orig_bdev = orig_bdev;