5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jeff Layton <jlayton@xxxxxxxxxx>
[ Upstream commit 7ecbe92696bb7fe32c80b6cf64736a0d157717a9 ]
ksmbd seems to be trying to use a cmd value of 0 when unlocking a file.
That activity requires a type of F_UNLCK with a cmd of F_SETLK. For
local POSIX locking, it doesn't matter much since vfs_lock_file ignores
@cmd, but filesystems that define their own ->lock operation expect to
see it set sanely.
Cc: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
Reviewed-by: David Howells <dhowells@xxxxxxxxxx>
Acked-by: Namjae Jeon <linkinjeon@xxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ksmbd/smb2pdu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -6803,7 +6803,7 @@ static int smb2_set_flock_flags(struct f
case SMB2_LOCKFLAG_UNLOCK:
ksmbd_debug(SMB, "received unlock request\n");
flock->fl_type = F_UNLCK;
- cmd = 0;
+ cmd = F_SETLK;
break;
}
@@ -7182,7 +7182,7 @@ out:
rlock->fl_start = smb_lock->start;
rlock->fl_end = smb_lock->end;
- rc = vfs_lock_file(filp, 0, rlock, NULL);
+ rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
if (rc)
pr_err("rollback unlock fail : %d\n", rc);
