Loic Poulain 69baa3a623 block: Deny writable memory mapping if block is read-only ... User should not be able to write block device if it is read-only at block level (e.g force_ro attribute). This is ensured in the regular fops write operation (blkdev_write_iter) but not when writing via user mapping (mmap), allowing user to actually write a read-only block device via a PROT_WRITE mapping. Example: This can lead to integrity issue of eMMC boot partition (e.g mmcblk0boot0) which is read-only by default. To fix this issue, simply deny shared writable mapping if the block is readonly. Note: Block remains writable if switch to read-only is performed after the initial mapping, but this is expected behavior according to commit a32e236eb9 ("Partially revert "block: fail op_is_write() requests to read-only partitions"")'. Signed-off-by: Loic Poulain <loic.poulain@linaro.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20230510074223.991297-1-loic.poulain@linaro.org Signed-off-by: Jens Axboe <axboe@kernel.dk>		2023-05-19 20:17:10 -06:00
..
partitions	block: Cleanup set_capacity()/bdev_set_nr_sectors()	2023-04-24 08:48:09 -06:00
Kconfig	for-6.4/block-2023-04-21	2023-04-26 12:52:58 -07:00
Kconfig.iosched	block: Default to use cgroup support for BFQ	2023-01-30 09:42:42 -07:00
Makefile	blk-mq-rdma: remove queue mapping helper for rdma devices	2023-04-13 08:59:05 +02:00
badblocks.c	…
bdev.c	block: sync part's ->bd_has_submit_bio with disk's	2023-04-25 07:36:02 -06:00
bfq-cgroup.c	blkcg: Restructure blkg_conf_prep() and friends	2023-04-13 06:46:49 -06:00
bfq-iosched.c	block, bfq: Fix division by zero error on zero wsum	2023-04-16 13:01:43 -06:00
bfq-iosched.h	block, bfq: remove BFQ_WEIGHT_LEGACY_DFL	2023-04-06 16:17:32 -06:00
bfq-wf2q.c	block, bfq: inject I/O to underutilized actuators	2023-01-29 15:18:33 -07:00
bio-integrity.c	block: bio-integrity: Copy flags when bio_integrity_payload is cloned	2023-02-16 11:05:41 -07:00
bio.c	ext4: Convert ext4_bio_write_page() to use a folio	2023-04-06 13:39:50 -04:00
blk-cgroup-fc-appid.c	cgroup: Homogenize cgroup_get_from_id() return value	2022-08-26 10:57:41 -10:00
blk-cgroup-rwstat.c	Revert "blk-cgroup: pin the gendisk in struct blkcg_gq"	2023-02-14 14:24:09 -07:00
blk-cgroup-rwstat.h	block: Use the new blk_opf_t type	2022-07-14 12:14:30 -06:00
blk-cgroup.c	for-6.4/block-2023-05-06	2023-05-06 08:28:58 -07:00
blk-cgroup.h	for-6.4/block-2023-04-21	2023-04-26 12:52:58 -07:00
blk-core.c	for-6.4/block-2023-04-21	2023-04-26 12:52:58 -07:00
blk-crypto-fallback.c	treewide: use get_random_bytes() when possible	2022-10-11 17:42:58 -06:00
blk-crypto-internal.h	blk-crypto: remove blk_crypto_insert_cloned_request()	2023-03-16 09:35:09 -06:00
blk-crypto-profile.c	blk-crypto: drop the NULL check from blk_crypto_put_keyslot()	2023-03-16 09:35:09 -06:00
blk-crypto-sysfs.c	block: make kobj_type structures constant	2023-02-09 09:38:16 -07:00
blk-crypto.c	blk-crypto: make blk_crypto_evict_key() more robust	2023-03-16 09:35:09 -06:00
blk-flush.c	blk-mq: fix the blk_mq_add_to_requeue_list call in blk_kick_flush	2023-04-16 13:01:43 -06:00
blk-ia-ranges.c	block: make kobj_type structures constant	2023-02-09 09:38:16 -07:00
blk-integrity.c	blk-integrity: register sysfs attributes on struct device	2023-04-26 18:22:50 -06:00
blk-ioc.c	…
blk-iocost.c	blkcg: Restructure blkg_conf_prep() and friends	2023-04-13 06:46:49 -06:00
blk-iolatency.c	blk-iolatency: Make initialization lazy	2023-04-13 06:46:49 -06:00
blk-ioprio.c	blk-cgroup: pass a gendisk to pd_alloc_fn	2023-02-03 08:20:05 -07:00
blk-ioprio.h	blk-ioprio: pass a gendisk to blk_ioprio_init and blk_ioprio_exit	2022-09-26 19:09:31 -06:00
blk-lib.c	blk-lib: fix blkdev_issue_secure_erase	2022-09-15 00:25:17 -06:00
blk-map.c	iov_iter: add iter_iovec() helper	2023-03-30 08:12:29 -06:00
blk-merge.c	blk-mq: release crypto keyslot before reporting I/O complete	2023-03-16 09:35:09 -06:00
blk-mq-cpumap.c	blk-mq: include <linux/blk-mq.h> in block/blk-mq.h	2023-04-13 06:52:29 -06:00
blk-mq-debugfs-zoned.c	block: move zone related fields to struct gendisk	2022-07-06 06:46:26 -06:00
blk-mq-debugfs.c	blk-mq: include <linux/blk-mq.h> in block/blk-mq.h	2023-04-13 06:52:29 -06:00
blk-mq-debugfs.h	…
blk-mq-pci.c	blk-mq: include <linux/blk-mq.h> in block/blk-mq.h	2023-04-13 06:52:29 -06:00
blk-mq-sched.c	blk-mq: cleanup __blk_mq_sched_dispatch_requests	2023-04-13 06:57:18 -06:00
blk-mq-sched.h	blk-mq: move blk_mq_sched_insert_request to blk-mq.c	2023-04-13 06:52:29 -06:00
blk-mq-sysfs.c	blk-mq: include <linux/blk-mq.h> in block/blk-mq.h	2023-04-13 06:52:29 -06:00
blk-mq-tag.c	blk-mq: include <linux/blk-mq.h> in block/blk-mq.h	2023-04-13 06:52:29 -06:00
blk-mq-virtio.c	blk-mq: include <linux/blk-mq.h> in block/blk-mq.h	2023-04-13 06:52:29 -06:00
blk-mq.c	for-6.4/block-2023-04-21	2023-04-26 12:52:58 -07:00
blk-mq.h	for-6.4/block-2023-04-21	2023-04-26 12:52:58 -07:00
blk-pm.c	blk-mq: include <linux/blk-mq.h> in block/blk-mq.h	2023-04-13 06:52:29 -06:00
blk-pm.h	…
blk-rq-qos.c	blk-rq-qos: store a gendisk instead of request_queue in struct rq_qos	2023-02-03 08:20:05 -07:00
blk-rq-qos.h	blk-iolatency: s/blkcg_rq_qos/iolat_rq_qos/	2023-04-13 06:46:49 -06:00
blk-settings.c	blk-wbt: move private information from blk-wbt.h to blk-wbt.c	2023-02-03 08:20:05 -07:00
blk-stat.c	blk-mq: include <linux/blk-mq.h> in block/blk-mq.h	2023-04-13 06:52:29 -06:00
blk-stat.h	…
blk-sysfs.c	blk-mq: include <linux/blk-mq.h> in block/blk-mq.h	2023-04-13 06:52:29 -06:00
blk-throttle.c	blk-throttle: only enable blk-stat when BLK_DEV_THROTTLING_LOW	2023-04-13 06:48:11 -06:00
blk-throttle.h	blk-throttle: pass a gendisk to blk_throtl_cancel_bios	2022-09-26 19:17:28 -06:00
blk-timeout.c	…
blk-wbt.c	blk-rq-qos: store a gendisk instead of request_queue in struct rq_qos	2023-02-03 08:20:05 -07:00
blk-wbt.h	blk-wbt: move private information from blk-wbt.h to blk-wbt.c	2023-02-03 08:20:05 -07:00
blk-zoned.c	block: remove more NULL checks after bdev_get_queue()	2023-02-21 09:23:22 -07:00
blk.h	blk-integrity: register sysfs attributes on struct device	2023-04-26 18:22:50 -06:00
bounce.c	block: change the blk_queue_bounce calling convention	2022-08-02 17:22:54 -06:00
bsg-lib.c	blk-mq: move the call to blk_put_queue out of blk_mq_destroy_queue	2022-10-25 08:25:10 -06:00
bsg.c	driver core: class: remove module * from class_create()	2023-03-17 15:16:33 +01:00
disk-events.c	…
elevator.c	block: make kobj_type structures constant	2023-02-09 09:38:16 -07:00
elevator.h	blk-mq: pass a flags argument to elevator_type->insert_requests	2023-04-13 06:52:30 -06:00
fops.c	block: Deny writable memory mapping if block is read-only	2023-05-19 20:17:10 -06:00
genhd.c	for-6.4/block-2023-05-06	2023-05-06 08:28:58 -07:00
holder.c	block: don't allow a disk link holder to itself	2022-11-16 15:19:56 -07:00
ioctl.c	block: fix scan partition for exclusively open device again	2023-02-17 06:15:57 -07:00
ioprio.c	…
kyber-iosched.c	blk-mq: pass a flags argument to elevator_type->insert_requests	2023-04-13 06:52:30 -06:00
mq-deadline.c	blk-mq: pass a flags argument to elevator_type->insert_requests	2023-04-13 06:52:30 -06:00
opal_proto.h	sed-opal: allow user authority to get locking range attributes.	2023-04-05 07:46:25 -06:00
sed-opal.c	sed-opal: geometry feature reporting command	2023-04-19 14:07:13 -06:00
t10-pi.c	…