path: root/fs/aio.c
diff options
authorLinus Torvalds <torvalds@linux-foundation.org>2018-12-14 12:18:30 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-12-14 12:18:30 -0800
commit380ef2c9ad4fdd5fdd81055857be21ae5f581877 (patch)
tree2d0406850494e77236e8eb20feb8c8d2889316ff /fs/aio.c
parent743e3c8f19db951ce9d20e6accb290444f4737a4 (diff)
parent927b6b2d69b4cc900fa50d7e46d8f1fa91c91b3a (diff)
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 (limited to 'fs/aio.c')
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/aio.c b/fs/aio.c
index 97f983592925..aac9659381d2 100644
--- 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))