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ksmbd: use scoped_with_init_fs() for share path resolution

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Use scoped_with_init_fs() to temporarily override current->fs for
the kern_path() call in share_config_request() so the share path
lookup happens in init's filesystem context.

All ksmbd paths ← SMB command handlers ← handle_ksmbd_work() ← workqueue
← ksmbd_conn_handler_loop() ← kthread

Link: https://patch.msgid.link/20260601-work-kthread-nullfs-v4-13-77ee053060e0@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2026-06-01 15:56:46 +02:00
parent 2a868a445b
commit 385668603a
1 changed files with 3 additions and 1 deletions
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4
fs/smb/server/mgmt/share_config.c
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@@ -9,6 +9,7 @@
#include <linux/rwsem.h>
#include <linux/parser.h>
#include <linux/namei.h>
#include <linux/fs_struct.h>
#include <linux/sched.h>
#include <linux/mm.h>
@@ -193,7 +194,8 @@ static struct ksmbd_share_config *share_config_request(struct ksmbd_work *work,
goto out;
}
ret = kern_path(share->path, 0, &share->vfs_path);
scoped_with_init_fs()
ret = kern_path(share->path, 0, &share->vfs_path);
ksmbd_revert_fsids(work);
if (ret) {
ksmbd_debug(SMB, "failed to access '%s'\n",