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pNFS: Fix disk addr range check in block/scsi layout

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[ Upstream commit 7db6e66663681abda54f81d5916db3a3b8b1a13d ]

At the end of the isect translation, disc_addr represents the physical
disk offset. Thus, end calculated from disk_addr is also a physical disk
offset. Therefore, range checking should be done using map->disk_offset,
not map->start.

Signed-off-by: Sergey Bashirov <sergeybashirov@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20250702133226.212537-1-sergeybashirov@gmail.com
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sergey Bashirov
2025-07-02 16:32:21 +03:00
committed by Greg Kroah-Hartman
parent 7a2105bbc7
commit dd7cb4936e
1 changed files with 2 additions and 2 deletions
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4
fs/nfs/blocklayout/blocklayout.c
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@@ -171,8 +171,8 @@ do_add_page_to_bio(struct bio *bio, int npg, int rw, sector_t isect,
/* limit length to what the device mapping allows */
end = disk_addr + *len;
if (end >= map->start + map->len)
*len = map->start + map->len - disk_addr;
if (end >= map->disk_offset + map->len)
*len = map->disk_offset + map->len - disk_addr;
retry:
if (!bio) {