fs: Free any excess xarray nodes in clear_inode()

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For many years we've had a hard to hit leak of xarray nodes.  Hugh
documented it well in commit 786b31121a.  Recently people and
syzbot have found ways to force it to happen with madvise.  Rather
than fix the leaks where they happen, just call xa_destroy() which
has the side-effect of cycling the i_pages lock.

Cc: Rik van Riel <riel@surriel.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Jinjiang Tu <tujinjiang@huawei.com>
Cc: Dave Jones <davej@codemonkey.org.uk>
Link: https://lore.kernel.org/all/20260121062243.1893129-1-tujinjiang@huawei.com/
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://patch.msgid.link/20260623192850.1595958-1-willy@infradead.org
Reviewed-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

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Matthew Wilcox (Oracle) 2026-06-23 20:28:48 +01:00 • committed by Christian Brauner

parent 0baad6f9b9

commit ee3f011250

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fs/inode.c

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