Sebastian Andrzej Siewior 9aab10a024 kernfs: Don't re-lock kernfs_root::kernfs_rwsem in kernfs_fop_readdir(). ... The readdir operation iterates over all entries and invokes dir_emit() for every entry passing kernfs_node::name as argument. Since the name argument can change, and become invalid, the kernfs_root::kernfs_rwsem lock should not be dropped to prevent renames during the operation. The lock drop around dir_emit() has been initially introduced in commit 1e5289c97b ("sysfs: Cache the last sysfs_dirent to improve readdir scalability v2") to avoid holding a global lock during a page fault. The lock drop is wrong since the support of renames and not a big burden since the lock is no longer global. Don't re-acquire kernfs_root::kernfs_rwsem while copying the name to the userpace buffer. Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Link: https://lore.kernel.org/r/20250213145023.2820193-5-bigeasy@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-02-15 17:46:32 +01:00
..
dir.c	kernfs: Don't re-lock kernfs_root::kernfs_rwsem in kernfs_fop_readdir().	2025-02-15 17:46:32 +01:00
file.c	kernfs: Acquire kernfs_rwsem in kernfs_notify_workfn().	2025-02-15 17:46:32 +01:00
inode.c	vfs-6.7.ctime	2023-10-30 09:47:13 -10:00
Kconfig
kernfs-internal.h	kernfs: RCU protect kernfs_nodes and avoid kernfs_idr_lock in kernfs_find_and_get_node_by_id()	2024-01-30 15:54:25 -08:00
Makefile
mount.c	kernfs: Acquire kernfs_rwsem in kernfs_node_dentry().	2025-02-15 17:46:32 +01:00
symlink.c	kernfs: fix all kernel-doc warnings and multiple typos	2022-11-23 19:28:26 +01:00