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iomap: prevent ioend merge when io_private differs

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Different io_private values indicate distinct completion contexts that
must not be merged together, as this could leak or corrupt the private
data associated with each ioend.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Link: https://patch.msgid.link/20260713074206.1768006-1-yi.zhang@huaweicloud.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
This commit is contained in:
Zhang Yi 2026-07-13 15:42:06 +08:00 committed by Christian Brauner
parent 1c9cb1826b
commit c97cd6f447
1 changed files with 2 additions and 0 deletions
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2
fs/iomap/ioend.c
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@ -385,6 +385,8 @@ static bool iomap_ioend_can_merge(struct iomap_ioend *ioend,
if (ioend->io_bio.bi_status != next->io_bio.bi_status)
return false;
if (ioend->io_private != next->io_private)
return false;
if (next->io_flags & IOMAP_IOEND_BOUNDARY)
return false;
if ((ioend->io_flags & IOMAP_IOEND_NOMERGE_FLAGS) !=