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| author | Hans Petter Selasky <hselasky@FreeBSD.org> | 2022-06-23 09:31:17 +0000 |
|---|---|---|
| committer | Hans Petter Selasky <hselasky@FreeBSD.org> | 2022-06-25 10:01:59 +0000 |
| commit | 6c4b6f55f77d8d7cee1b277bd6579a77d6890ef9 (patch) | |
| tree | 7714d2104f51d2a8277934625ee210ba4ad66e9d /lib/libcbor/cbor/cbor_export.h | |
| parent | 61c74fb66f1bef776923cbd5b2a62fb06b003f0c (diff) | |
| download | src-6c4b6f55f77d8d7cee1b277bd6579a77d6890ef9.tar.gz src-6c4b6f55f77d8d7cee1b277bd6579a77d6890ef9.zip | |
busdma: Protect ARM busdma bounce page counters using the bounce page lock.
In bus_dmamap_unload() on ARM, the counters for free_bpages and reserved_bpages
appear to be vulnerable to unprotected read-modify-write operations that result
in accounting that looks like a page leak.
This was noticed on a 2GB quad core i.MX6 system that has more than one device
attached via FTDI based USB serial connection.
Submitted by: John Hein <jcfyecrayz@liamekaens.com>
Differential Revision: https://reviews.freebsd.org/D35553
PR: 264836
MFC after: 3 days
Sponsored by: NVIDIA Networking
Diffstat (limited to 'lib/libcbor/cbor/cbor_export.h')
0 files changed, 0 insertions, 0 deletions