From: Hangyu Hua hbh25y@gmail.com
mainline inclusion from mainline-v6.3-rc1 commit d3ca9f7aeba793d74361d88a8800b2f205c9236b category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6KEWO?from=project-issue CVE: CVE-2023-1193
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
--------------------------------
argv needs to be free when setup_async_work fails or when the current process is woken up.
Fixes: e2f34481b24d ("cifsd: add server-side procedures for SMB3") Cc: stable@vger.kernel.org Signed-off-by: Hangyu Hua hbh25y@gmail.com Acked-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Zizhi Wo wozizhi@huawei.com --- fs/ksmbd/smb2pdu.c | 28 +++++++++++++--------------- fs/ksmbd/vfs_cache.c | 5 ++--- 2 files changed, 15 insertions(+), 18 deletions(-)
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 979cde35721d..a89e6644afa9 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -6655,7 +6655,7 @@ int smb2_cancel(struct ksmbd_work *work) struct ksmbd_conn *conn = work->conn; struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); struct smb2_hdr *chdr; - struct ksmbd_work *cancel_work = NULL, *iter; + struct ksmbd_work *iter; struct list_head *command_list;
ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", @@ -6677,7 +6677,9 @@ int smb2_cancel(struct ksmbd_work *work) "smb2 with AsyncId %llu cancelled command = 0x%x\n", le64_to_cpu(hdr->Id.AsyncId), le16_to_cpu(chdr->Command)); - cancel_work = iter; + iter->state = KSMBD_WORK_CANCELLED; + if (iter->cancel_fn) + iter->cancel_fn(iter->cancel_argv); break; } spin_unlock(&conn->request_lock); @@ -6696,18 +6698,12 @@ int smb2_cancel(struct ksmbd_work *work) "smb2 with mid %llu cancelled command = 0x%x\n", le64_to_cpu(hdr->MessageId), le16_to_cpu(chdr->Command)); - cancel_work = iter; + iter->state = KSMBD_WORK_CANCELLED; break; } spin_unlock(&conn->request_lock); }
- if (cancel_work) { - cancel_work->state = KSMBD_WORK_CANCELLED; - if (cancel_work->cancel_fn) - cancel_work->cancel_fn(cancel_work->cancel_argv); - } - /* For SMB2_CANCEL command itself send no response*/ work->send_no_response = 1; return 0; @@ -7071,6 +7067,14 @@ int smb2_lock(struct ksmbd_work *work)
ksmbd_vfs_posix_lock_wait(flock);
+ spin_lock(&work->conn->request_lock); + spin_lock(&fp->f_lock); + list_del(&work->fp_entry); + work->cancel_fn = NULL; + kfree(argv); + spin_unlock(&fp->f_lock); + spin_unlock(&work->conn->request_lock); + if (work->state != KSMBD_WORK_ACTIVE) { list_del(&smb_lock->llist); spin_lock(&work->conn->llist_lock); @@ -7079,9 +7083,6 @@ int smb2_lock(struct ksmbd_work *work) locks_free_lock(flock);
if (work->state == KSMBD_WORK_CANCELLED) { - spin_lock(&fp->f_lock); - list_del(&work->fp_entry); - spin_unlock(&fp->f_lock); rsp->hdr.Status = STATUS_CANCELLED; kfree(smb_lock); @@ -7103,9 +7104,6 @@ int smb2_lock(struct ksmbd_work *work) list_del(&smb_lock->clist); spin_unlock(&work->conn->llist_lock);
- spin_lock(&fp->f_lock); - list_del(&work->fp_entry); - spin_unlock(&fp->f_lock); goto retry; } else if (!rc) { spin_lock(&work->conn->llist_lock); diff --git a/fs/ksmbd/vfs_cache.c b/fs/ksmbd/vfs_cache.c index 26db346c5c4f..2a445befcc62 100644 --- a/fs/ksmbd/vfs_cache.c +++ b/fs/ksmbd/vfs_cache.c @@ -364,12 +364,11 @@ static void __put_fd_final(struct ksmbd_work *work, struct ksmbd_file *fp)
static void set_close_state_blocked_works(struct ksmbd_file *fp) { - struct ksmbd_work *cancel_work, *ctmp; + struct ksmbd_work *cancel_work;
spin_lock(&fp->f_lock); - list_for_each_entry_safe(cancel_work, ctmp, &fp->blocked_works, + list_for_each_entry(cancel_work, &fp->blocked_works, fp_entry) { - list_del(&cancel_work->fp_entry); cancel_work->state = KSMBD_WORK_CLOSED; cancel_work->cancel_fn(cancel_work->cancel_argv); }