udf: Allocate name buffer in directory iterator on heap

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Currently we allocate name buffer in directory iterators (struct
udf_fileident_iter) on stack. These structures are relatively large
(some 360 bytes on 64-bit architectures). For udf_rename() which needs
to keep three of these structures in parallel the stack usage becomes
rather heavy - 1536 bytes in total. Allocate the name buffer in the
iterator from heap to avoid excessive stack usage.

Link: https://lore.kernel.org/all/202212200558.lK9x1KW0-lkp@intel.com
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Jan Kara <jack@suse.cz>

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This commit is contained in:

Jan Kara 2022-12-20 12:38:45 +01:00

parent 19fd80de0a

commit 0aba4860b0

2 changed files with 16 additions and 9 deletions

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23

fs/udf/directory.c

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2

fs/udf/udfdecl.h

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