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 4508ec17357094e2075f334948393ddedbb75157 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024021928-granite-partake-3387@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..
Possible dependencies:
4508ec173570 ("smb: client: set correct id, uid and cruid for multiuser automounts") 561f82a3a24c ("smb: client: rename cifs_dfs_ref.c to namespace.c") 38c8a9a52082 ("smb: move client and server files to common directory fs/smb") b56bce502f55 ("cifs: set DFS root session in cifs_get_smb_ses()") 7ad54b98fc1f ("cifs: use origin fullpath for automounts") a1c0d00572fc ("cifs: share dfs connections and supers") a73a26d97eca ("cifs: split out ses and tcon retrieval from mount_get_conns()") 2301bc103ac4 ("cifs: remove unused smb3_fs_context::mount_options") abdb1742a312 ("cifs: get rid of mount options string parsing") 9fd29a5bae6e ("cifs: use fs_context for automounts") 68e14569d7e5 ("smb3: add dynamic trace points for tree disconnect") 13609a8b3ac6 ("cifs: move from strlcpy with unused retval to strscpy") 5dd8ce24667a ("cifs: missing directory in MAINTAINERS file") 332019e23a51 ("Merge tag '5.20-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 4508ec17357094e2075f334948393ddedbb75157 Mon Sep 17 00:00:00 2001 From: Paulo Alcantara pc@manguebit.com Date: Sun, 11 Feb 2024 20:19:30 -0300 Subject: [PATCH] smb: client: set correct id, uid and cruid for multiuser automounts
When uid, gid and cruid are not specified, we need to dynamically set them into the filesystem context used for automounting otherwise they'll end up reusing the values from the parent mount.
Fixes: 9fd29a5bae6e ("cifs: use fs_context for automounts") Reported-by: Shane Nehring snehring@iastate.edu Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2259257 Cc: stable@vger.kernel.org # 6.2+ Signed-off-by: Paulo Alcantara (Red Hat) pc@manguebit.com Signed-off-by: Steve French stfrench@microsoft.com
diff --git a/fs/smb/client/namespace.c b/fs/smb/client/namespace.c index a6968573b775..4a517b280f2b 100644 --- a/fs/smb/client/namespace.c +++ b/fs/smb/client/namespace.c @@ -168,6 +168,21 @@ static char *automount_fullpath(struct dentry *dentry, void *page) return s; }
+static void fs_context_set_ids(struct smb3_fs_context *ctx) +{ + kuid_t uid = current_fsuid(); + kgid_t gid = current_fsgid(); + + if (ctx->multiuser) { + if (!ctx->uid_specified) + ctx->linux_uid = uid; + if (!ctx->gid_specified) + ctx->linux_gid = gid; + } + if (!ctx->cruid_specified) + ctx->cred_uid = uid; +} + /* * Create a vfsmount that we can automount */ @@ -205,6 +220,7 @@ static struct vfsmount *cifs_do_automount(struct path *path) tmp.leaf_fullpath = NULL; tmp.UNC = tmp.prepath = NULL; tmp.dfs_root_ses = NULL; + fs_context_set_ids(&tmp);
rc = smb3_fs_context_dup(ctx, &tmp); if (rc) {