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btrfs: only free root_path if it was allocated from the heap

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Noticed this while doing some snapshots in a chroot environment

btrfs receive can set root_path to either realmnt, which is passed in from the
command line, or to a heap allocated via find_mount_root  in do_receive.  We
should only free the later, not the former, as the former results in an invalid
pointer warning from glibc during free.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Neil Horman 2015-12-03 13:45:44 -05:00 committed by David Sterba
parent e3bd2d145f
commit 2cb9b4dbbd
1 changed files with 3 additions and 1 deletions
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4
cmds-receive.c
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@ -1201,7 +1201,9 @@ out:
close(r->write_fd);
r->write_fd = -1;
}
free(r->root_path);
if (r->root_path != realmnt)
free(r->root_path);
r->root_path = NULL;
r->dest_dir_path = NULL;
free(dest_dir_full_path);