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3 ksmbd SMB3 server fixes

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Merge tag 'v6.15-rc8-ksmbd-server-fixes' of git://git.samba.org/ksmbd

Pull smb server fixes from Steve French:

 - Fix for rename regression due to the recent VFS lookup changes

 - Fix write failure

 - locking fix for oplock handling

* tag 'v6.15-rc8-ksmbd-server-fixes' of git://git.samba.org/ksmbd:
  ksmbd: use list_first_entry_or_null for opinfo_get_list()
  ksmbd: fix rename failure
  ksmbd: fix stream write failure
This commit is contained in:
Linus Torvalds 2025-05-23 08:42:29 -07:00
commit e0f8e1a7c1
2 changed files with 9 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

7
fs/smb/server/oplock.c
View file

@ -146,12 +146,9 @@ static struct oplock_info *opinfo_get_list(struct ksmbd_inode *ci)
{
struct oplock_info *opinfo;
if (list_empty(&ci->m_op_list))
return NULL;
down_read(&ci->m_lock);
opinfo = list_first_entry(&ci->m_op_list, struct oplock_info,
op_entry);
opinfo = list_first_entry_or_null(&ci->m_op_list, struct oplock_info,
op_entry);
if (opinfo) {
if (opinfo->conn == NULL ||
!atomic_inc_not_zero(&opinfo->refcount))

16
fs/smb/server/vfs.c
View file

@ -409,10 +409,15 @@ static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos,
ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n",
*pos, count);
if (*pos >= XATTR_SIZE_MAX) {
pr_err("stream write position %lld is out of bounds\n", *pos);
return -EINVAL;
}
size = *pos + count;
if (size > XATTR_SIZE_MAX) {
size = XATTR_SIZE_MAX;
count = (*pos + count) - XATTR_SIZE_MAX;
count = XATTR_SIZE_MAX - *pos;
}
v_len = ksmbd_vfs_getcasexattr(idmap,
@ -426,13 +431,6 @@ static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos,
goto out;
}
if (v_len <= *pos) {
pr_err("stream write position %lld is out of bounds (stream length: %zd)\n",
*pos, v_len);
err = -EINVAL;
goto out;
}
if (v_len < size) {
wbuf = kvzalloc(size, KSMBD_DEFAULT_GFP);
if (!wbuf) {
@ -684,7 +682,7 @@ int ksmbd_vfs_rename(struct ksmbd_work *work, const struct path *old_path,
struct ksmbd_file *parent_fp;
int new_type;
int err, lookup_flags = LOOKUP_NO_SYMLINKS;
int target_lookup_flags = LOOKUP_RENAME_TARGET;
int target_lookup_flags = LOOKUP_RENAME_TARGET | LOOKUP_CREATE;
if (ksmbd_override_fsids(work))
return -ENOMEM;