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| /freebsd/sys/dev/mlx5/mlx5_core/ |
| H A D | mlx5_cmd.c | 47a6fb9d Thu Jan 18 21:47:52 GMT 2024 Mark Johnston <markj@FreeBSD.org> mlx5: Zero DMA memory mlx5_alloc_cmd_msg() and alloc_cmd_page()
These functions may map more memory for DMA than is actually used, since
the allocator operates on multiples of a 4KB page size. Thus,
bus_dmamap_sync() can trigger KMSAN reports when the unused portion of
a page is not zero-ed.
Reported by: KMSAN
Reviewed by: kib
MFC after: 2 weeks
Sponsored by: Klara, Inc.
Sponsored by: Juniper Networks, Inc.
Differential Revision: https://reviews.freebsd.org/D43133
47a6fb9d Thu Jan 18 21:47:52 GMT 2024 Mark Johnston <markj@FreeBSD.org> mlx5: Zero DMA memory mlx5_alloc_cmd_msg() and alloc_cmd_page()
These functions may map more memory for DMA than is actually used, since
the allocator operates on multiples of a 4KB page size. Thus,
bus_dmamap_sync() can trigger KMSAN reports when the unused portion of
a page is not zero-ed.
Reported by: KMSAN
Reviewed by: kib
MFC after: 2 weeks
Sponsored by: Klara, Inc.
Sponsored by: Juniper Networks, Inc.
Differential Revision: https://reviews.freebsd.org/D43133
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