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{ "id": 2216547, "url": "http://patchwork.ozlabs.org/api/covers/2216547/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/cover/20260326173532.1858716-1-youssef.abdulrahman@oss.qualcomm.com/", "project": { "id": 15, "url": "http://patchwork.ozlabs.org/api/projects/15/?format=api", "name": "Ubuntu Kernel", "link_name": "ubuntu-kernel", "list_id": "kernel-team.lists.ubuntu.com", "list_email": "kernel-team@lists.ubuntu.com", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260326173532.1858716-1-youssef.abdulrahman@oss.qualcomm.com>", "list_archive_url": null, "date": "2026-03-26T17:35:31", "name": "[SRU,N,0/1] Fix potential page fault caused by sha256 calculation", "submitter": { "id": 92981, "url": "http://patchwork.ozlabs.org/api/people/92981/?format=api", "name": "Youssef Samir", "email": "youssef.abdulrahman@oss.qualcomm.com" }, "mbox": "http://patchwork.ozlabs.org/project/ubuntu-kernel/cover/20260326173532.1858716-1-youssef.abdulrahman@oss.qualcomm.com/mbox/", "series": [ { "id": 497633, "url": "http://patchwork.ozlabs.org/api/series/497633/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/list/?series=497633", "date": "2026-03-26T17:35:32", "name": "Fix potential page fault caused by sha256 calculation", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/497633/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2216547/comments/", "headers": { "Return-Path": "<kernel-team-bounces@lists.ubuntu.com>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=HJoa05f8;\n\tdkim=fail reason=\"signature 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d75a77b69052e-50b80e8bc96mr118628141cf.58.1774546535357;\n Thu, 26 Mar 2026 10:35:35 -0700 (PDT)", "by 2002:ac8:5a42:0:b0:50b:5491:ddd8 with SMTP id\n d75a77b69052e-50b80e8bc96mr118627131cf.58.1774546534537;\n Thu, 26 Mar 2026 10:35:34 -0700 (PDT)" ], "From": "Youssef Samir <youssef.abdulrahman@oss.qualcomm.com>", "To": "kernel-team@lists.ubuntu.com", "Subject": "[SRU][N][PATCH 0/1] Fix potential page fault caused by sha256\n calculation", "Date": "Thu, 26 Mar 2026 18:35:31 +0100", "Message-ID": "<20260326173532.1858716-1-youssef.abdulrahman@oss.qualcomm.com>", "X-Mailer": "git-send-email 2.43.0", "MIME-Version": "1.0", "X-Authority-Analysis": "v=2.4 cv=e7cLiKp/ c=1 sm=1 tr=0 ts=69c56e68 cx=c_pps\n a=EVbN6Ke/fEF3bsl7X48z0g==:117 a=dNlqnMcrdpbb+gQrTujlOQ==:17\n a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22\n a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=danhDmx_AAAA:8\n a=11scLQIyVtm4K2eyP2kA:9 a=a_PwQJl-kcHnX1M80qC6:22", "X-Proofpoint-GUID": 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phishscore=0\n suspectscore=0 clxscore=1011 lowpriorityscore=0 malwarescore=0 adultscore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603260126", "Received-SPF": "pass client-ip=205.220.180.131;\n envelope-from=youssef.abdulrahman@oss.qualcomm.com;\n helo=mx0b-0031df01.pphosted.com", "X-BeenThere": "kernel-team@lists.ubuntu.com", "X-Mailman-Version": "2.1.20", "Precedence": "list", "List-Id": "Kernel team discussions <kernel-team.lists.ubuntu.com>", "List-Unsubscribe": "<https://lists.ubuntu.com/mailman/options/kernel-team>,\n <mailto:kernel-team-request@lists.ubuntu.com?subject=unsubscribe>", "List-Archive": "<https://lists.ubuntu.com/archives/kernel-team>", "List-Post": "<mailto:kernel-team@lists.ubuntu.com>", "List-Help": "<mailto:kernel-team-request@lists.ubuntu.com?subject=help>", "List-Subscribe": "<https://lists.ubuntu.com/mailman/listinfo/kernel-team>,\n <mailto:kernel-team-request@lists.ubuntu.com?subject=subscribe>", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "Errors-To": "kernel-team-bounces@lists.ubuntu.com", "Sender": "\"kernel-team\" <kernel-team-bounces@lists.ubuntu.com>" }, "content": "BugLink: https://bugs.launchpad.net/bugs/2146472\n\nSRU Justification:\n\n[Impact]\n\nCalculating the SHA-256 of a buffer with a size larger than 2GB and is not divisible by 64 will lead to a page fault.\n\nMore specifically, this was seen in the firmware loader on Ubuntu 24.04.4 LTS, where CONFIG_FW_LOADER_DEBUG is enabled. Loading a firmware file that is 3619035928 bytes fails with the following splat:\n\n[1667258.914177] BUG: unable to handle page fault for address: ffffb731b3fbcd40\n[1667258.914188] #PF: supervisor read access in kernel mode\n[1667258.914193] #PF: error_code(0x0000) - not-present page\n[1667258.914198] PGD 100000067 P4D 100000067 PUD 1002d4067 PMD 529eec067 PTE 0\n[1667258.914208] Oops: 0000 [#3] PREEMPT SMP PTI\n[1667258.914214] CPU: 11 PID: 1252644 Comm: kworker/11:1 Tainted: P D W OE 6.8.0-62-generic #65-Ubuntu\n[1667258.914223] Hardware name: Wiwynn Twin Lakes MP/Twin Lakes Passive MP, BIOS YMGPE07 12/23/2019\n[1667258.914229] Workqueue: events sahara_processing [qaic]\n[1667258.914257] RIP: 0010:memcpy_orig+0x105/0x130\n[1667258.914267] Code: 0f 1f 44 00 00 83 fa 04 72 1b 8b 0e 44 8b 44 16 fc 89 0f 44 89 44 17 fc c3 cc cc cc cc 0f 1f 84 00 00 00 00 00 83 ea 01 72 19 <0f> b6 0e 74 12 4c 0f b6 46 01 4c 0f b6 0c 16 44 88 47 01 44 88 0c\n[1667258.914278] RSP: 0018:ffffb731a3c57c78 EFLAGS: 00010202\n[1667258.914284] RAX: ffffa0ac564f41b0 RBX: ffffa0ac564f41b0 RCX: 00000000d7af7212\n[1667258.914290] RDX: 0000000000000001 RSI: ffffb731b3fbcd40 RDI: ffffa0ac564f41b0\n[1667258.914295] RBP: ffffb731a3c57ca8 R08: 000000005ab6c582 R09: 0000000072a12f7b\n[1667258.914301] R10: 0000000064f65b73 R11: 000000001cb47ae9 R12: ffffffff93d71d40\n[1667258.914306] R13: ffffb731b3fbcd40 R14: 0000000000000002 R15: ffffb7322024b000\n[1667258.914311] FS: 0000000000000000(0000) GS:ffffa0bb7f580000(0000) knlGS:0000000000000000\n[1667258.914318] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[1667258.914323] CR2: ffffb731b3fbcd40 CR3: 0000000b09e3c005 CR4: 00000000007706f0\n[1667258.914329] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[1667258.914334] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[1667258.914339] PKRU: 55555554\n[1667258.914342] Call Trace:\n[1667258.914346] <TASK>\n[1667258.914350] ? show_regs+0x6d/0x80\n[1667258.914358] ? __die+0x24/0x80\n[1667258.914364] ? page_fault_oops+0x99/0x1b0\n[1667258.914372] ? kernelmode_fixup_or_oops.isra.0+0x69/0x90\n[1667258.914380] ? __bad_area_nosemaphore+0x19e/0x2c0\n[1667258.914388] ? bad_area_nosemaphore+0x16/0x30\n[1667258.914394] ? do_kern_addr_fault+0x7b/0xa0\n[1667258.914400] ? exc_page_fault+0x1a4/0x1b0\n[1667258.914407] ? asm_exc_page_fault+0x27/0x30\n[1667258.914417] ? memcpy_orig+0x105/0x130\n[1667258.914425] ? lib_sha256_base_do_update.isra.0+0x5d/0x1d0 [sha256_ssse3]\n[1667258.914433] ? __pfx_sha256_transform_rorx+0x10/0x10 [sha256_ssse3]\n[1667258.914440] sha256_finup+0xf5/0x150 [sha256_ssse3]\n[1667258.914447] sha256_avx2_digest+0x55/0x70 [sha256_ssse3]\n[1667258.914453] crypto_shash_digest+0x2a/0x60\n[1667258.914460] fw_log_firmware_info+0x113/0x1b0\n[1667258.914469] _request_firmware+0x19d/0x4b0\n[1667258.914476] firmware_request_nowarn+0x36/0x60\n[1667258.914482] sahara_processing+0x399/0x710 [qaic]\n[1667258.914501] process_one_work+0x181/0x3a0\n[1667258.914508] worker_thread+0x306/0x440\n[1667258.914514] ? _raw_spin_lock_irqsave+0xe/0x20\n[1667258.914521] ? __pfx_worker_thread+0x10/0x10\n[1667258.914526] kthread+0xef/0x120\n[1667258.914533] ? __pfx_kthread+0x10/0x10\n[1667258.914540] ret_from_fork+0x44/0x70\n[1667258.914546] ? __pfx_kthread+0x10/0x10\n[1667258.914552] ret_from_fork_asm+0x1b/0x30\n[1667258.914561] </TASK>\n[1667258.914564] Modules linked in: tls nfsv3 rpcsec_gss_krb5 nfsv4 nfs netfs snd_seq_dummy snd_hrtimer snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd soundcore qrtr_mhi(OE) qrtr(OE) xt_conntrack xt_MASQUERADE bridge stp llc xt_set ip_set nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xt_addrtype nft_compat nf_tables xfrm_user xfrm_algo openafs(POE-) overlay cfg80211 binfmt_misc nls_iso8859_1 intel_rapl_msr intel_rapl_common intel_uncore_frequency intel_uncore_frequency_common isst_if_common skx_edac skx_edac_common nfit x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel ipmi_ssif kvm cmdlinepart spi_nor irqbypass mtd qaic(OE) mei_me rapl intel_cstate i2c_i801 mhi(OE) spi_intel_pci mei switchtec(OE) ioatdma spi_intel i2c_smbus intel_pch_thermal dca ipmi_si acpi_power_meter acpi_ipmi ipmi_devintf ipmi_msghandler acpi_pad mac_hid sch_fq_codel dm_multipath nfsd msr parport_pc auth_rpcgss nfs_acl lockd ppdev grace lp parport sunrpc efi_pstore nfnetlink dmi_sysfs\n[1667258.914665] ip_tables x_tables autofs4 btrfs blake2b_generic xor raid6_pq libcrc32c dm_mirror dm_region_hash dm_log crct10dif_pclmul crc32_pclmul polyval_clmulni polyval_generic nvme ghash_clmulni_intel sha256_ssse3 bnxt_en sha1_ssse3 nvme_core xhci_pci nvme_auth xhci_pci_renesas wmi aesni_intel crypto_simd cryptd\n[1667258.914741] CR2: ffffb731b3fbcd40\n[1667258.914746] ---[ end trace 0000000000000000 ]---\n\n[Fix]\n\nCherry-pick upstream commit:\n70165dc3ec8c (\"crypto: sha256 - fix crash at kexec\")\n\n[Test Plan]\n\n* An x86_64 system with Ubuntu 24.04.4 LTS, Linux 6.8.0-101-generic x86_64 and Qualcomm AIC100 PCIe card installed\n* Create a dummy file with size larger than 2GB and not divisible by 64, compress it using zstd, then replace it with any of the firmware files in /lib/firmware/qcom/aic100/\n* Reset the AIC100 device to force reloading the firmware files by writing 1 to /sys/bus/mhi/devices/mhi0/soc_reset\n\n[Where Problems Could Occur]\n\nAny <v6.16 kernel entity that makes use of sha256_update()\n\nBreno Leitao (1):\n crypto: sha256 - fix crash at kexec\n\n include/crypto/sha256_base.h | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)" }