On 2019/08/06 1:41, Bart Van Assche wrote: > Hi Jan, > > A new kernel warning is triggered by blktests block/001 that did not happen > without this patch. Reverting commit 89e524c04fa9 ("loop: Fix mount(2) > failure due to race with LOOP_SET_FD") makes that kernel warning disappear. > Is this reproducible on your setup? > > Thanks, > > Bart. > > kernel: WARNING: CPU: 5 PID: 907 at fs/block_dev.c:1899 __blkdev_put+0x396/0x3a0 Hmm, this is reported as below one. WARNING in __blkdev_put (2) https://syzkaller.appspot.com/bug?id=1ac7a7a8440522302ccb634ba69f8e1e6f203902