This is a note to let you know that I've just added the patch titled
loop: fix type of block size
to the 6.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
loop-fix-type-of-block-size.patch
and it can be found in the queue-6.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a58f07fcb87ddbbcb4072cedb98673194e38bbe3
Author: Li Wang <liwang@xxxxxxxxxx>
Date: Sat Nov 9 10:27:44 2024 +0800
loop: fix type of block size
[ Upstream commit 8e604cac499248c75ad3a26695a743ff879ded5c ]
PAGE_SIZE may be 64K, and the max block size can be PAGE_SIZE, so any
variable for holding block size can't be defined as 'unsigned short'.
Unfortunately commit 473516b36193 ("loop: use the atomic queue limits
update API") passes 'bsize' with type of 'unsigned short' to
loop_reconfigure_limits(), and causes LTP/ioctl_loop06 test failure:
12 ioctl_loop06.c:76: TINFO: Using LOOP_SET_BLOCK_SIZE with arg > PAGE_SIZE
13 ioctl_loop06.c:59: TFAIL: Set block size succeed unexpectedly
...
18 ioctl_loop06.c:76: TINFO: Using LOOP_CONFIGURE with block_size > PAGE_SIZE
19 ioctl_loop06.c:59: TFAIL: Set block size succeed unexpectedly
Fixes the issue by defining 'block size' variable with 'unsigned int', which is
aligned with block layer's definition.
(improve commit log & add fixes tag)
Fixes: 473516b36193 ("loop: use the atomic queue limits update API")
Cc: John Garry <john.g.garry@xxxxxxxxxx>
Cc: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
Reviewed-by: Jan Stancek <jstancek@xxxxxxxxxx>
Signed-off-by: Li Wang <liwang@xxxxxxxxxx>
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
Reviewed-by: John Garry <john.g.garry@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20241109022744.1126003-1-ming.lei@xxxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 78a7bb28defe4..86cc3b19faae8 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -173,7 +173,7 @@ static loff_t get_loop_size(struct loop_device *lo, struct file *file)
static bool lo_bdev_can_use_dio(struct loop_device *lo,
struct block_device *backing_bdev)
{
- unsigned short sb_bsize = bdev_logical_block_size(backing_bdev);
+ unsigned int sb_bsize = bdev_logical_block_size(backing_bdev);
if (queue_logical_block_size(lo->lo_queue) < sb_bsize)
return false;
@@ -977,7 +977,7 @@ loop_set_status_from_info(struct loop_device *lo,
return 0;
}
-static unsigned short loop_default_blocksize(struct loop_device *lo,
+static unsigned int loop_default_blocksize(struct loop_device *lo,
struct block_device *backing_bdev)
{
/* In case of direct I/O, match underlying block size */
@@ -986,7 +986,7 @@ static unsigned short loop_default_blocksize(struct loop_device *lo,
return SECTOR_SIZE;
}
-static int loop_reconfigure_limits(struct loop_device *lo, unsigned short bsize)
+static int loop_reconfigure_limits(struct loop_device *lo, unsigned int bsize)
{
struct file *file = lo->lo_backing_file;
struct inode *inode = file->f_mapping->host;
