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Howlett" , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Suren Baghdasaryan , Vlastimil Babka , linux-kernel@vger.kernel.org, linux-mm@kvack.org, stable@vger.kernel.org X-Mailer: b4 0.16.1-dev X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: C1CA6140008 X-Stat-Signature: nfb3wsp5qr5e7auz8py3nhrpej4ff4oe X-Rspam-User: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-HE-Tag: 1793269126-195831 X-HE-Meta: U2FsdGVkX188lAEVSQQuZwzmk8Zbr6oEDAZxpOrKBWxWuKwc11qx46xqTDk6/3tCGw1HsgcLhGRcVxpTN786rdDl2yAoz6f4aFHum6tfCvnOnnjqV0lx8jnQqG24IQGuH/LBQWivkeQKCzHlelTFXgaecHusHEwFlk2fCbI0wjgusyDn2ddfaKvsDYIcrCnO3pqcMYDu5RBB2ucLTMDf33V3gjeDvftfeHbKdYxS20OZgscDf2TqX/w+xAkkjpCagcjcXII/FTu1y5b1LAsjUwcUgfUEOBaY86VgWiXrk8vWMQ1odmG2wdqcoJG0Sm79EpA9OSF59R/kE/ashwsls0pJxcME9zfqTe7/B4YpH+dDvrWh44/OIz41QPLugB3kIctn0iTTuL9yGFGGL8U50QpYb8SnbKYH5erX0UjvdpFkMJ1LH+yl4eqFSS3jIpFt51Ys8pixCOUmqD4hlM993xPLAnjZIOh1+mw56KHmODSPkIcZ9JA0i5tLaKk9sDYpAQYoOazYBdKis2D+j4rFvQeY274bL7PbvAiV/Hx418UBRauP4AB3GA8fq5GMaeI0bxCdxY29MhK5QB1fuMODgUawjjdTzV9WS/u6/LpQvMP2tYkYxDbe9DdfF13wUzQkkV44CrwL92YbcVcfKYYRdWBk+gwszWvLNPmPl7e/KgsNBdTpuXETKEc6Eq+RkP2IMkFlqCj2NoAEQ/iRaAo/GSD+YBZCBwfBNVQqcnhBlFcfI9CCgvKxpSAoe0Tz2FIspTiYORretb3XYetZKy6TIfjQUtOLKP7e2uYfn5ELXJV6eeKpUDDGPvlFHi0ohVQp3BLiQd61TyJ6e/f0MNfhG/UuFYu5bERdBG3swpECC6MAz5olQa8Da6wJDa6lFJ+zHXSvtXjJgNsXEMFcSDa5hFPOw6FOs7AjkB8En0o22gy4ATYb6qG42CEihUTWh+4zxUeqIhFdM6XdNSnjyKc Hd3ihAkR FYt5RhQ9Oxkg+18nvTYiIVBN9zudZHxY/RS0dbLUnbLwRX4Pydqhi0SOhD17bBmmNlcNzwaTHZ9+ojer1jVZeCqk0cs2M0nL8mdAqv0Vfy7iTHpv8NTnOQi2+CeYpkiKu09LkL4lsSltceSMbBPZJe7g0YOix2njO29EVcBWFeDxjxHu/G6NxyNnGsmacfFwDwdGucJ6oc/VqiSI4iX/A/ZmxUMgnbfnxp1t0Ml4oJ8FVsJYip8BenE3Odg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On systems with unaccepted memory, memblock allocations accept the allocated range, but when cma_declare_contiguous_multi() uses open coded allocation of multiple ranges, it reserves them with memblock_reserve() and they are never accepted. These pages are released to the buddy allocator by cma_activate_area() with __free_pages() that does not check for unaccepted memory, so the first access to such a page in a TDX or SEV-SNP guest is fatal. Accept the memory of each range when it is reserved. Fixes: c009da4258f9 ("mm, cma: support multiple contiguous ranges, if requested") Cc: stable@vger.kernel.org Signed-off-by: Mike Rapoport (Microsoft) --- mm/cma.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/cma.c b/mm/cma.c index a10ea37a261da..0035efb1130a5 100644 --- a/mm/cma.c +++ b/mm/cma.c @@ -678,6 +678,8 @@ int __init cma_declare_contiguous_multi(phys_addr_t total_size, break; } + accept_memory(mlp->base, size); + pr_debug("created region %d: %016llx - %016llx\n", nr, (u64)mlp->base, (u64)mlp->base + size); cmrp = &cma->ranges[nr++]; -- 2.53.0