btrfs: tests: do not touch page cache if root/inode allocation failed

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Inside test_find_delalloc() of extent-io-tests.c, if we fail to allocate
a dummy root or the test inode, we go to out label to clean up.

But at that stage, @inode is still NULL and we will call
process_page_range() to access the page cache of the inode, this will
cause NULL pointer dereference.

This is a very minor bug, as it only affects selftests which are not
compiled in by default for most distros, and very hard to trigger.

Fix it by adding a new out_root_info label to handle root and inode
allocation failure.

This is a pre-existing bug reported by Sashiko while reviewing another
patch.

Link: https://sashiko.dev/#/patchset/cover.1786095309.git.wqu%40suse.com
Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

...

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Qu Wenruo 2026-08-11 15:31:49 +09:30 • committed by David Sterba

parent 2acb9f3d1c

commit 0c1032c8c3

1 changed files with 3 additions and 2 deletions

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fs/btrfs/tests/extent-io-tests.c

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