Re: [PATCH] btrfs: Fix potential null pointer deref

From: Josef Bacik
Date: Mon Sep 21 2020 - 15:16:37 EST

On 9/21/20 3:12 PM, Alex Dewar wrote:
In btrfs_destroy_inode(), the variable root may be NULL, but the check
for this takes place after its value has already been dereferenced to
access its fs_info member. Move the dereference operation to later in
the function.

Fixes: a6dbd429d8dd ("Btrfs: fix panic when trying to destroy a newly allocated")
Addresses-Coverity: CID 1497103: Null pointer dereferences (REVERSE_INULL)
Signed-off-by: Alex Dewar <a.dewar@xxxxxxxxxxxx>

Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx>