David Carlier 958e032618 eventfs: Use list_add_tail_rcu() for SRCU-protected children list ...

[ Upstream commit f67950b288 ]

Commit d2603279c7 ("eventfs: Use list_del_rcu() for SRCU protected
list variable") converted the removal side to pair with the
list_for_each_entry_srcu() walker in eventfs_iterate(). The insertion
in eventfs_create_dir() was left as a plain list_add_tail(), which on
weakly-ordered architectures can expose a new entry to the SRCU reader
before its list pointers and fields are observable.

Use list_add_tail_rcu() so the publication pairs with the existing
list_del_rcu() and list_for_each_entry_srcu().

Fixes: 43aa6f97c2 ("eventfs: Get rid of dentry pointers without refcounts")
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260418152251.199343-1-devnexen@gmail.com
Signed-off-by: David Carlier <devnexen@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
[ adapted scoped_guard(mutex, &eventfs_mutex) block to explicit mutex_lock()/mutex_unlock() pair ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2026-05-23 13:03:34 +02:00

..

event_inode.c

eventfs: Use list_add_tail_rcu() for SRCU-protected children list

2026-05-23 13:03:34 +02:00

inode.c

eventfs: Hold eventfs_mutex and SRCU when remount walks events

2026-05-17 17:13:41 +02:00

internal.h

eventfs: Hold eventfs_mutex and SRCU when remount walks events

2026-05-17 17:13:41 +02:00

Makefile

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