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commit 380ef2c9ad4fdd5fdd81055857be21ae5f581877
parent 743e3c8f19db951ce9d20e6accb290444f4737a4
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Fri, 14 Dec 2018 12:18:30 -0800

Merge tag 'for-linus-20181214' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "Three small fixes for this week. contains:

   - spectre indexing fix for aio (Jeff)

   - fix for the previous zeroing bio fix, we don't need it for user
     mapped pages, and in fact it breaks some applications if we do
     (Keith)

   - allocation failure fix for null_blk with zoned (Shin'ichiro)"

* tag 'for-linus-20181214' of git://git.kernel.dk/linux-block:
  block: Fix null_blk_zoned creation failure with small number of zones
  aio: fix spectre gadget in lookup_ioctx
  block/bio: Do not zero user pages

Diffstat:
Mblock/bio.c | 3++-
Mblock/blk-zoned.c | 2+-
Mfs/aio.c | 2++
3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/block/bio.c b/block/bio.c @@ -1261,7 +1261,8 @@ struct bio *bio_copy_user_iov(struct request_queue *q, if (ret) goto cleanup; } else { - zero_fill_bio(bio); + if (bmd->is_our_pages) + zero_fill_bio(bio); iov_iter_advance(iter, bio->bi_iter.bi_size); } diff --git a/block/blk-zoned.c b/block/blk-zoned.c @@ -378,7 +378,7 @@ static struct blk_zone *blk_alloc_zones(int node, unsigned int *nr_zones) struct page *page; int order; - for (order = get_order(size); order > 0; order--) { + for (order = get_order(size); order >= 0; order--) { page = alloc_pages_node(node, GFP_NOIO | __GFP_ZERO, order); if (page) { *nr_zones = min_t(unsigned int, *nr_zones, diff --git a/fs/aio.c b/fs/aio.c @@ -45,6 +45,7 @@ #include <asm/kmap_types.h> #include <linux/uaccess.h> +#include <linux/nospec.h> #include "internal.h" @@ -1038,6 +1039,7 @@ static struct kioctx *lookup_ioctx(unsigned long ctx_id) if (!table || id >= table->nr) goto out; + id = array_index_nospec(id, table->nr); ctx = rcu_dereference(table->table[id]); if (ctx && ctx->user_id == ctx_id) { if (percpu_ref_tryget_live(&ctx->users))