This is a note to let you know that I've just added the patch titled btrfs: check unsupported filters in balance arguments to the 4.3-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: btrfs-check-unsupported-filters-in-balance-arguments.patch and it can be found in the queue-4.3 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 849ef9286f30c88113906dc35f44a499c0cb385d Mon Sep 17 00:00:00 2001 From: David Sterba <dsterba@xxxxxxxx> Date: Mon, 12 Oct 2015 16:55:54 +0200 Subject: btrfs: check unsupported filters in balance arguments From: David Sterba <dsterba@xxxxxxxx> commit 849ef9286f30c88113906dc35f44a499c0cb385d upstream. We don't verify that all the balance filter arguments supplemented by the flags are actually known to the kernel. Thus we let it silently pass and do nothing. At the moment this means only the 'limit' filter, but we're going to add a few more soon so it's better to have that fixed. Also in older stable kernels so that it works with newer userspace tools. Signed-off-by: David Sterba <dsterba@xxxxxxxx> Signed-off-by: Chris Mason <clm@xxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/btrfs/ioctl.c | 5 +++++ fs/btrfs/volumes.h | 8 ++++++++ 2 files changed, 13 insertions(+) --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -4644,6 +4644,11 @@ locked: goto out_bctl; } + if (bctl->flags & ~(BTRFS_BALANCE_ARGS_MASK | BTRFS_BALANCE_TYPE_MASK)) { + ret = -EINVAL; + goto out_bargs; + } + do_balance: /* * Ownership of bctl and mutually_exclusive_operation_running --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -384,6 +384,14 @@ struct map_lookup { BTRFS_BALANCE_ARGS_VRANGE | \ BTRFS_BALANCE_ARGS_LIMIT) +#define BTRFS_BALANCE_ARGS_MASK \ + (BTRFS_BALANCE_ARGS_PROFILES | \ + BTRFS_BALANCE_ARGS_USAGE | \ + BTRFS_BALANCE_ARGS_DEVID | \ + BTRFS_BALANCE_ARGS_DRANGE | \ + BTRFS_BALANCE_ARGS_VRANGE | \ + BTRFS_BALANCE_ARGS_LIMIT) + /* * Profile changing flags. When SOFT is set we won't relocate chunk if * it already has the target profile (even though it may be Patches currently in stable-queue which might be from dsterba@xxxxxxxx are queue-4.3/btrfs-check-unsupported-filters-in-balance-arguments.patch queue-4.3/btrfs-fix-signed-overflows-in-btrfs_sync_file.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html