xfs: fix stack contents leakage in the v1 inumber ioctls

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Explicitly initialize the onstack structures to zero so we don't leak
kernel memory into userspace when converting the in-core inumbers
structure to the v1 inogrp ioctl structure.  Add a comment about why we
have to use memset to ensure that the padding holes in the structures
are set to zero.

Fixes: 5f19c7fc68 ("xfs: introduce v5 inode group structure")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>

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Darrick J. Wong 2019-07-28 21:12:32 -07:00

parent 609488bc97

commit 2e616d9f9c

1 changed files with 3 additions and 0 deletions

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fs/xfs/xfs_itable.c

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