configfs: fix lockless traversals of ->s_children

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[ Upstream commit 9b9e8bb81c ]

Having the parent directory locked protects entries from removal
by another thread, but it does *not* protect cursors from being
moved around by lseek() - or freed, for that matter.

Fixes: 6f61076406 ("configfs: Introduce configfs_dirent_lock")
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Al Viro 2026-05-30 03:48:34 -04:00 • committed by Greg Kroah-Hartman

parent 7865a1bfd2

commit 91f289728e

1 changed files with 41 additions and 13 deletions

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fs/configfs/dir.c

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