The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 98ca62ba9e2be5863c7d069f84f7166b45a5b2f4 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024072921-steadfast-bulk-c488@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

98ca62ba9e2b ("sysctl: always initialize i_uid/i_gid") 520713a93d55 ("sysctl: treewide: drop unused argument ctl_table_root::set_ownership(table)") f9436a5d0497 ("sysctl: allow to change limits for posix messages queues") 50ec499b9a43 ("sysctl: allow change system v ipc sysctls inside ipc namespace") 0889f44e2810 ("ipc: Check permissions for checkpoint_restart sysctls at open time") 1f5c135ee509 ("ipc: Store ipc sysctls in the ipc namespace") dc55e35f9e81 ("ipc: Store mqueue sysctls in the ipc namespace") 0e9beb8a96f2 ("ipc/ipc_sysctl.c: remove fallback for !CONFIG_PROC_SYSCTL") 5563cabdde7e ("ipc: check checkpoint_restore_ns_capable() to modify C/R proc files")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 98ca62ba9e2be5863c7d069f84f7166b45a5b2f4 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= linux@weissschuh.net Date: Tue, 2 Apr 2024 23:10:34 +0200 Subject: [PATCH] sysctl: always initialize i_uid/i_gid MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

Always initialize i_uid/i_gid inside the sysfs core so set_ownership() can safely skip setting them.

Commit 5ec27ec735ba ("fs/proc/proc_sysctl.c: fix the default values of i_uid/i_gid on /proc/sys inodes.") added defaults for i_uid/i_gid when set_ownership() was not implemented. It also missed adjusting net_ctl_set_ownership() to use the same default values in case the computation of a better value failed.

Fixes: 5ec27ec735ba ("fs/proc/proc_sysctl.c: fix the default values of i_uid/i_gid on /proc/sys inodes.") Cc: stable@vger.kernel.org Signed-off-by: Thomas Weißschuh linux@weissschuh.net Signed-off-by: Joel Granados j.granados@samsung.com

diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c index b1c2c0b82116..dd7b462387a0 100644 --- a/fs/proc/proc_sysctl.c +++ b/fs/proc/proc_sysctl.c @@ -476,12 +476,10 @@ static struct inode *proc_sys_make_inode(struct super_block *sb, make_empty_dir_inode(inode); }

+ inode->i_uid = GLOBAL_ROOT_UID; + inode->i_gid = GLOBAL_ROOT_GID; if (root->set_ownership) root->set_ownership(head, &inode->i_uid, &inode->i_gid); - else { - inode->i_uid = GLOBAL_ROOT_UID; - inode->i_gid = GLOBAL_ROOT_GID; - }

return inode; }