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authorLinus Torvalds <torvalds@linux-foundation.org>2019-12-13 23:27:19 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2019-12-13 23:27:19 +0100
commitf1fcd7786ec8e316b69860ab856f29f346a9b301 (patch)
treee913c7a36d17e6aad5e451fffa37e4a3d51c7115 /block
parentMerge tag 'io_uring-5.5-20191212' of git://git.kernel.dk/linux-block (diff)
parentblk-cgroup: remove blkcg_drain_queue (diff)
downloadlinux-f1fcd7786ec8e316b69860ab856f29f346a9b301.tar.xz
linux-f1fcd7786ec8e316b69860ab856f29f346a9b301.zip
Merge tag 'for-linus-20191212' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe: - stable fix for the bi_size overflow. Not a corruption issue, but a case wher we could merge but disallowed (Andreas) - NVMe pull request via Keith, with various fixes. - MD pull request from Song. - Merge window regression fix for the rq passthrough stats (Logan) - Remove unused blkcg_drain_queue() function (Guoqing) * tag 'for-linus-20191212' of git://git.kernel.dk/linux-block: blk-cgroup: remove blkcg_drain_queue block: fix NULL pointer dereference in account statistics with IDE md: make sure desc_nr less than MD_SB_DISKS md: raid1: check rdev before reference in raid1_sync_request func raid5: need to set STRIPE_HANDLE for batch head block: fix "check bi_size overflow before merge" nvme/pci: Fix read queue count nvme/pci Limit write queue sizes to possible cpus nvme/pci: Fix write and poll queue types nvme/pci: Remove last_cq_head nvme: Namepace identification descriptor list is optional nvme-fc: fix double-free scenarios on hw queues nvme: else following return is not needed nvme: add error message on mismatching controller ids nvme_fc: add module to ops template to allow module references nvmet-loop: Avoid preallocating big SGL for data nvme-fc: Avoid preallocating big SGL for data nvme-rdma: Avoid preallocating big SGL for data
Diffstat (limited to 'block')
-rw-r--r--block/bio.c4
-rw-r--r--block/blk-cgroup.c20
-rw-r--r--block/blk-core.c5
3 files changed, 6 insertions, 23 deletions
diff --git a/block/bio.c b/block/bio.c
index 9d54aa37ce6c..a5d75f6bf4c7 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -754,10 +754,12 @@ bool __bio_try_merge_page(struct bio *bio, struct page *page,
if (WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)))
return false;
- if (bio->bi_vcnt > 0 && !bio_full(bio, len)) {
+ if (bio->bi_vcnt > 0) {
struct bio_vec *bv = &bio->bi_io_vec[bio->bi_vcnt - 1];
if (page_is_mergeable(bv, page, len, off, same_page)) {
+ if (bio->bi_iter.bi_size > UINT_MAX - len)
+ return false;
bv->bv_len += len;
bio->bi_iter.bi_size += len;
return true;
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 708dea92dac8..a229b94d5390 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1062,26 +1062,6 @@ err_unlock:
}
/**
- * blkcg_drain_queue - drain blkcg part of request_queue
- * @q: request_queue to drain
- *
- * Called from blk_drain_queue(). Responsible for draining blkcg part.
- */
-void blkcg_drain_queue(struct request_queue *q)
-{
- lockdep_assert_held(&q->queue_lock);
-
- /*
- * @q could be exiting and already have destroyed all blkgs as
- * indicated by NULL root_blkg. If so, don't confuse policies.
- */
- if (!q->root_blkg)
- return;
-
- blk_throtl_drain(q);
-}
-
-/**
* blkcg_exit_queue - exit and release blkcg part of request_queue
* @q: request_queue being released
*
diff --git a/block/blk-core.c b/block/blk-core.c
index e4b27f7e9f51..e0a094fddee5 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1310,7 +1310,7 @@ EXPORT_SYMBOL_GPL(blk_rq_err_bytes);
void blk_account_io_completion(struct request *req, unsigned int bytes)
{
- if (blk_do_io_stat(req)) {
+ if (req->part && blk_do_io_stat(req)) {
const int sgrp = op_stat_group(req_op(req));
struct hd_struct *part;
@@ -1328,7 +1328,8 @@ void blk_account_io_done(struct request *req, u64 now)
* normal IO on queueing nor completion. Accounting the
* containing request is enough.
*/
- if (blk_do_io_stat(req) && !(req->rq_flags & RQF_FLUSH_SEQ)) {
+ if (req->part && blk_do_io_stat(req) &&
+ !(req->rq_flags & RQF_FLUSH_SEQ)) {
const int sgrp = op_stat_group(req_op(req));
struct hd_struct *part;