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ksmbd: use scoped_with_init_fs() for filesystem info path lookup

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Use scoped_with_init_fs() to temporarily override current->fs for
the kern_path() call in smb2_get_info_filesystem() 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-v4-14-77ee053060e0@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2026-06-01 15:56:47 +02:00
parent 385668603a
commit a82c92bcfc
1 changed files with 3 additions and 1 deletions
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4
fs/smb/server/smb2pdu.c
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@@ -9,6 +9,7 @@
#include <net/addrconf.h>
#include <linux/syscalls.h>
#include <linux/namei.h>
#include <linux/fs_struct.h>
#include <linux/statfs.h>
#include <linux/ethtool.h>
#include <linux/falloc.h>
@@ -5867,7 +5868,8 @@ static int smb2_get_info_filesystem(struct ksmbd_work *work,
if (!share->path)
return -EIO;
rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
scoped_with_init_fs()
rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
if (rc) {
pr_err("cannot create vfs path\n");
return -EIO;