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| author | Ming Lei <tom.leiming@gmail.com> | 2026-04-09 21:30:14 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-04-09 19:08:35 -0600 |
| commit | 211ff1602b67e26125977f8b2f369d7c2847628c (patch) | |
| tree | d7376474d7fc27ddd9f5bdc6767f80f919b3db2c /tools/perf/scripts/python/stackcollapse.py | |
| parent | 23b3b6f0b584b70a427d5bb826d320151890d7da (diff) | |
ublk: verify all pages in multi-page bvec fall within registered range
rq_for_each_bvec() yields multi-page bvecs where bv_page is only the
first page. ublk_try_buf_match() only validated the start PFN against
the maple tree, but a bvec can span multiple pages past the end of a
registered range.
Use mas_walk() instead of mtree_load() to obtain the range boundaries
stored in the maple tree, and check that the bvec's end PFN does not
exceed the range. Also remove base_pfn from struct ublk_buf_range
since mas.index already provides the range start PFN.
Reported-by: Caleb Sander Mateos <csander@purestorage.com>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Link: https://patch.msgid.link/20260409133020.3780098-3-tom.leiming@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions