Christian A. Ehrhardt 13f3956eb5 block: Fix WARNING in _copy_from_iter ... Syzkaller reports a warning in _copy_from_iter because an iov_iter is supposedly used in the wrong direction. The reason is that syzcaller managed to generate a request with a transfer direction of SG_DXFER_TO_FROM_DEV. This instructs the kernel to copy user buffers into the kernel, read into the copied buffers and then copy the data back to user space. Thus the iovec is used in both directions. Detect this situation in the block layer and construct a new iterator with the correct direction for the copy-in. Reported-by: syzbot+a532b03fdfee2c137666@syzkaller.appspotmail.com Closes: https://lore.kernel.org/lkml/0000000000009b92c10604d7a5e9@google.com/t/ Reported-by: syzbot+63dec323ac56c28e644f@syzkaller.appspotmail.com Closes: https://lore.kernel.org/lkml/0000000000003faaa105f6e7c658@google.com/T/ Signed-off-by: Christian A. Ehrhardt <lk@c--e.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20240121202634.275068-1-lk@c--e.de Signed-off-by: Jens Axboe <axboe@kernel.dk>		2024-01-23 08:56:55 -07:00
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partitions	block: Move checking GENHD_FL_NO_PART to bdev_add_partition()	2024-01-22 09:51:29 -07:00
Kconfig	…
Kconfig.iosched	…
Makefile	…
badblocks.c	…
bdev.c	vfs-6.8.super	2024-01-08 10:43:51 -08:00
bfq-cgroup.c	…
bfq-iosched.c	…
bfq-iosched.h	…
bfq-wf2q.c	…
bio-integrity.c	block: bio-integrity: fix kcalloc() arguments order	2024-01-16 09:51:22 -07:00
bio.c	…
blk-cgroup-fc-appid.c	…
blk-cgroup-rwstat.c	…
blk-cgroup-rwstat.h	…
blk-cgroup.c	block: Correct a documentation comment in blk-cgroup.c	2024-01-15 07:23:38 -07:00
blk-cgroup.h	blk-cgroup: fix rcu lockdep warning in blkg_lookup()	2024-01-04 16:08:54 -07:00
blk-core.c	for-6.8/block-2024-01-08	2024-01-11 13:58:04 -08:00
blk-crypto-fallback.c	…
blk-crypto-internal.h	…
blk-crypto-profile.c	…
blk-crypto-sysfs.c	…
blk-crypto.c	…
blk-flush.c	…
blk-ia-ranges.c	…
blk-integrity.c	…
blk-ioc.c	…
blk-iocost.c	block/iocost: silence warning on 'last_period' potentially being unused	2024-01-10 08:43:06 -07:00
blk-iolatency.c	…
blk-ioprio.c	…
blk-ioprio.h	…
blk-lib.c	…
blk-map.c	block: Fix WARNING in _copy_from_iter	2024-01-23 08:56:55 -07:00
blk-merge.c	…
blk-mq-cpumap.c	…
blk-mq-debugfs-zoned.c	…
blk-mq-debugfs.c	blk-mq: Remove the hctx 'run' debugfs attribute	2024-01-17 14:16:34 -07:00
blk-mq-debugfs.h	…
blk-mq-pci.c	…
blk-mq-sched.c	blk-mq: Remove the hctx 'run' debugfs attribute	2024-01-17 14:16:34 -07:00
blk-mq-sched.h	…
blk-mq-sysfs.c	…
blk-mq-tag.c	…
blk-mq-virtio.c	…
blk-mq.c	for-6.8/block-2024-01-18	2024-01-18 18:22:40 -08:00
blk-mq.h	…
blk-pm.c	…
blk-pm.h	…
blk-rq-qos.c	…
blk-rq-qos.h	…
blk-settings.c	block: floor the discard granularity to the physical block size	2024-01-04 16:05:49 -07:00
blk-stat.c	…
blk-stat.h	…
blk-sysfs.c	for-6.8/block-2024-01-08	2024-01-11 13:58:04 -08:00
blk-throttle.c	…
blk-throttle.h	…
blk-timeout.c	…
blk-wbt.c	…
blk-wbt.h	…
blk-zoned.c	block: Treat sequential write preferred zone type as invalid	2024-01-08 08:34:24 -07:00
blk.h	…
bounce.c	…
bsg-lib.c	…
bsg.c	…
disk-events.c	…
early-lookup.c	…
elevator.c	…
elevator.h	…
fops.c	…
genhd.c	…
holder.c	…
ioctl.c	block: Move checking GENHD_FL_NO_PART to bdev_add_partition()	2024-01-22 09:51:29 -07:00
ioprio.c	block: move __get_task_ioprio() into header file	2024-01-08 12:27:39 -07:00
kyber-iosched.c	…
mq-deadline.c	…
opal_proto.h	…
sed-opal.c	…
t10-pi.c	…