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btrfs: fix use of uninitialized variable at rm device ioctl

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commit 37b4599547 upstream.

Clang static analysis reports this problem
ioctl.c:3333:8: warning: 3rd function call argument is an
  uninitialized value
    ret = exclop_start_or_cancel_reloc(fs_info,

cancel is only set in one branch of an if-check and is always used.  So
initialize to false.

Fixes: 1a15eb724a ("btrfs: use btrfs_get_dev_args_from_path in dev removal ioctls")
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tom Rix 2022-01-21 05:45:22 -08:00 committed by Greg Kroah-Hartman
parent cb91c0548f
commit 3b9f491386
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/ioctl.c
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@ -3291,7 +3291,7 @@ static long btrfs_ioctl_rm_dev(struct file *file, void __user *arg)
struct block_device *bdev = NULL;
fmode_t mode;
int ret;
bool cancel;
bool cancel = false;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;