btrfs: add the missing error handling inside get_canonical_dev_path

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[ Upstream commit fe4de594f7 ]

Inside function get_canonical_dev_path(), we call d_path() to get the
final device path.

But d_path() can return error, and in that case the next strscpy() call
will trigger an invalid memory access.

Add back the missing error handling for d_path().

Reported-by: Boris Burkov <boris@bur.io>
Fixes: 7e06de7c83 ("btrfs: canonicalize the device path before adding it")
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Qu Wenruo 2025-01-08 14:14:04 +10:30 • committed by Greg Kroah-Hartman

parent 1654578a3b

commit d0fb574193

1 changed files with 4 additions and 0 deletions

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fs/btrfs/volumes.c

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