{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2022-48795", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nparisc: Fix data TLB miss in sba_unmap_sg\n\nRolf Eike Beer reported the following bug:\n\n[1274934.746891] Bad Address (null pointer deref?): Code=15 (Data TLB miss fault) at addr 0000004140000018\n[1274934.746891] CPU: 3 PID: 5549 Comm: cmake Not tainted 5.15.4-gentoo-parisc64 #4\n[1274934.746891] Hardware name: 9000/785/C8000\n[1274934.746891]\n[1274934.746891] YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI\n[1274934.746891] PSW: 00001000000001001111111000001110 Not tainted\n[1274934.746891] r00-03 000000ff0804fe0e 0000000040bc9bc0 00000000406760e4 0000004140000000\n[1274934.746891] r04-07 0000000040b693c0 0000004140000000 000000004a2b08b0 0000000000000001\n[1274934.746891] r08-11 0000000041f98810 0000000000000000 000000004a0a7000 0000000000000001\n[1274934.746891] r12-15 0000000040bddbc0 0000000040c0cbc0 0000000040bddbc0 0000000040bddbc0\n[1274934.746891] r16-19 0000000040bde3c0 0000000040bddbc0 0000000040bde3c0 0000000000000007\n[1274934.746891] r20-23 0000000000000006 000000004a368950 0000000000000000 0000000000000001\n[1274934.746891] r24-27 0000000000001fff 000000000800000e 000000004a1710f0 0000000040b693c0\n[1274934.746891] r28-31 0000000000000001 0000000041f988b0 0000000041f98840 000000004a171118\n[1274934.746891] sr00-03 00000000066e5800 0000000000000000 0000000000000000 00000000066e5800\n[1274934.746891] sr04-07 0000000000000000 0000000000000000 0000000000000000 0000000000000000\n[1274934.746891]\n[1274934.746891] IASQ: 0000000000000000 0000000000000000 IAOQ: 00000000406760e8 00000000406760ec\n[1274934.746891] IIR: 48780030 ISR: 0000000000000000 IOR: 0000004140000018\n[1274934.746891] CPU: 3 CR30: 00000040e3a9c000 CR31: ffffffffffffffff\n[1274934.746891] ORIG_R28: 0000000040acdd58\n[1274934.746891] IAOQ[0]: sba_unmap_sg+0xb0/0x118\n[1274934.746891] IAOQ[1]: sba_unmap_sg+0xb4/0x118\n[1274934.746891] RP(r2): sba_unmap_sg+0xac/0x118\n[1274934.746891] Backtrace:\n[1274934.746891] [<00000000402740cc>] dma_unmap_sg_attrs+0x6c/0x70\n[1274934.746891] [<000000004074d6bc>] scsi_dma_unmap+0x54/0x60\n[1274934.746891] [<00000000407a3488>] mptscsih_io_done+0x150/0xd70\n[1274934.746891] [<0000000040798600>] mpt_interrupt+0x168/0xa68\n[1274934.746891] [<0000000040255a48>] __handle_irq_event_percpu+0xc8/0x278\n[1274934.746891] [<0000000040255c34>] handle_irq_event_percpu+0x3c/0xd8\n[1274934.746891] [<000000004025ecb4>] handle_percpu_irq+0xb4/0xf0\n[1274934.746891] [<00000000402548e0>] generic_handle_irq+0x50/0x70\n[1274934.746891] [<000000004019a254>] call_on_stack+0x18/0x24\n[1274934.746891]\n[1274934.746891] Kernel panic - not syncing: Bad Address (null pointer deref?)\n\nThe bug is caused by overrunning the sglist and incorrectly testing\nsg_dma_len(sglist) before nents. Normally this doesn't cause a crash,\nbut in this case sglist crossed a page boundary. This occurs in the\nfollowing code:\n\n\twhile (sg_dma_len(sglist) && nents--) {\n\nThe fix is simply to test nents first and move the decrement of nents\ninto the loop." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "1da177e4c3f4", "version_value": "f23f0444ead4" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "4.9.303", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.14.268", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.231", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.181", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.102", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.25", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.16.11", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.17", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/f23f0444ead4d941165aa82ce2fcbb997dc00e97", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/f23f0444ead4d941165aa82ce2fcbb997dc00e97" }, { "url": "https://git.kernel.org/stable/c/de75676ee99bf9f25b1124ff301b3f7b8ba597d4", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/de75676ee99bf9f25b1124ff301b3f7b8ba597d4" }, { "url": "https://git.kernel.org/stable/c/867e50231c7605547d9334904d70a181f39f2d9e", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/867e50231c7605547d9334904d70a181f39f2d9e" }, { "url": "https://git.kernel.org/stable/c/efccc9b0c7e28d0eb7918a236e59f60dc23db4c3", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/efccc9b0c7e28d0eb7918a236e59f60dc23db4c3" }, { "url": "https://git.kernel.org/stable/c/f8f519d7df66c334b5e08f896ac70ee3b53add3b", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/f8f519d7df66c334b5e08f896ac70ee3b53add3b" }, { "url": "https://git.kernel.org/stable/c/8c8e949ae81e7f5ab58f9f9f8e9b573b93173dd2", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/8c8e949ae81e7f5ab58f9f9f8e9b573b93173dd2" }, { "url": "https://git.kernel.org/stable/c/e40ae3133ed87d6d526f3c8fc6a5f9a2d72dcdbf", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/e40ae3133ed87d6d526f3c8fc6a5f9a2d72dcdbf" }, { "url": "https://git.kernel.org/stable/c/b7d6f44a0fa716a82969725516dc0b16bc7cd514", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/b7d6f44a0fa716a82969725516dc0b16bc7cd514" } ] }, "generator": { "engine": "bippy-c9c4e1df01b2" } }