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Brian Foster
91481af949
The XFS filestreams allocator caches dir inode -> agno mappings in an MRU mechanism that holds elements in memory for an amount of time and then cleans up expired elements in the background. The elements typically held inode pointers without holding a reference to the associated inode. This means that if the inode is reclaimed before an expired entry is cleaned up, the MRU reaper can access freed memory and cause a panic. Test for this problem by performing continuous filestreams allocations under short-lived parent directory inodes. This will produce KASAN use-after-free splats if enabled during the test. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
3 lines
43 B
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3 lines
43 B
Plaintext
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