{"id":"CVE-2024-56568","summary":"iommu/arm-smmu: Defer probe of clients after smmu device bound","details":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/arm-smmu: Defer probe of clients after smmu device bound\n\nNull pointer dereference occurs due to a race between smmu\ndriver probe and client driver probe, when of_dma_configure()\nfor client is called after the iommu_device_register() for smmu driver\nprobe has executed but before the driver_bound() for smmu driver\nhas been called.\n\nFollowing is how the race occurs:\n\nT1:Smmu device probe\t\tT2: Client device probe\n\nreally_probe()\narm_smmu_device_probe()\niommu_device_register()\n\t\t\t\t\treally_probe()\n\t\t\t\t\tplatform_dma_configure()\n\t\t\t\t\tof_dma_configure()\n\t\t\t\t\tof_dma_configure_id()\n\t\t\t\t\tof_iommu_configure()\n\t\t\t\t\tiommu_probe_device()\n\t\t\t\t\tiommu_init_device()\n\t\t\t\t\tarm_smmu_probe_device()\n\t\t\t\t\tarm_smmu_get_by_fwnode()\n\t\t\t\t\t\tdriver_find_device_by_fwnode()\n\t\t\t\t\t\tdriver_find_device()\n\t\t\t\t\t\tnext_device()\n\t\t\t\t\t\tklist_next()\n\t\t\t\t\t\t    /* null ptr\n\t\t\t\t\t\t       assigned to smmu */\n\t\t\t\t\t/* null ptr dereference\n\t\t\t\t\t   while smmu-\u003estreamid_mask */\ndriver_bound()\n\tklist_add_tail()\n\nWhen this null smmu pointer is dereferenced later in\narm_smmu_probe_device, the device crashes.\n\nFix this by deferring the probe of the client device\nuntil the smmu device has bound to the arm smmu driver.\n\n[will: Add comment]","modified":"2026-03-10T21:52:50.818376Z","published":"2024-12-27T14:23:11.733Z","related":["MGASA-2025-0030","MGASA-2025-0032","SUSE-SU-2025:0289-1","SUSE-SU-2025:0428-1","SUSE-SU-2025:0499-1","SUSE-SU-2025:0557-1","SUSE-SU-2025:0784-1","SUSE-SU-2025:0847-1","SUSE-SU-2025:0856-1","USN-7379-2","USN-7380-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56568.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/229e6ee43d2a160a1592b83aad620d6027084aad"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4a9485918a042e3114890dfbe19839a1897f8b2c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5018696b19bc6c021e934a8a59f4b1dd8c0ac9f8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c2527d07c7e9cda2c6165d5edccf74752baac1b0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dc02407ea952e20c544a078a6be2e6f008327973"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f8f794f387ad21c4696e5cd0626cb6f8a5f6aea5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56568.json"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56568"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"021bb8420d44cf56102d44fca9af628625e75482"},{"fixed":"c2527d07c7e9cda2c6165d5edccf74752baac1b0"},{"fixed":"dc02407ea952e20c544a078a6be2e6f008327973"},{"fixed":"f8f794f387ad21c4696e5cd0626cb6f8a5f6aea5"},{"fixed":"4a9485918a042e3114890dfbe19839a1897f8b2c"},{"fixed":"5018696b19bc6c021e934a8a59f4b1dd8c0ac9f8"},{"fixed":"229e6ee43d2a160a1592b83aad620d6027084aad"}]}],"versions":["v4.10","v4.10-rc1","v4.10-rc2","v4.10-rc3","v4.10-rc4","v4.10-rc5","v4.10-rc6","v4.10-rc7","v4.10-rc8","v4.11","v4.11-rc1","v4.11-rc2","v4.11-rc3","v4.11-rc4","v4.11-rc5","v4.11-rc6","v4.11-rc7","v4.11-rc8","v4.12","v4.12-rc1","v4.12-rc2","v4.12-rc3","v4.12-rc4","v4.12-rc5","v4.12-rc6","v4.12-rc7","v4.13","v4.13-rc1","v4.13-rc2","v4.13-rc3","v4.13-rc4","v4.13-rc5","v4.13-rc6","v4.13-rc7","v4.14","v4.14-rc1","v4.14-rc2","v4.14-rc3","v4.14-rc4","v4.14-rc5","v4.14-rc6","v4.14-rc7","v4.14-rc8","v4.15","v4.15-rc1","v4.15-rc2","v4.15-rc3","v4.15-rc4","v4.15-rc5","v4.15-rc6","v4.15-rc7","v4.15-rc8","v4.15-rc9","v4.16","v4.16-rc1","v4.16-rc2","v4.16-rc3","v4.16-rc4","v4.16-rc5","v4.16-rc6","v4.16-rc7","v4.17","v4.17-rc1","v4.17-rc2","v4.17-rc3","v4.17-rc4","v4.17-rc5","v4.17-rc6","v4.17-rc7","v4.18","v4.18-rc1","v4.18-rc2","v4.18-rc3","v4.18-rc4","v4.18-rc5","v4.18-rc6","v4.18-rc7","v4.18-rc8","v4.19","v4.19-rc1","v4.19-rc2","v4.19-rc3","v4.19-rc4","v4.19-rc5","v4.19-rc6","v4.19-rc7","v4.19-rc8","v4.20","v4.20-rc1","v4.20-rc2","v4.20-rc3","v4.20-rc4","v4.20-rc5","v4.20-rc6","v4.20-rc7","v4.8","v4.8-rc5","v4.8-rc6","v4.8-rc7","v4.8-rc8","v4.9","v4.9-rc1","v4.9-rc2","v4.9-rc3","v4.9-rc4","v4.9-rc5","v4.9-rc6","v4.9-rc7","v4.9-rc8","v5.0","v5.0-rc1","v5.0-rc2","v5.0-rc3","v5.0-rc4","v5.0-rc5","v5.0-rc6","v5.0-rc7","v5.0-rc8","v5.1","v5.1-rc1","v5.1-rc2","v5.1-rc3","v5.1-rc4","v5.1-rc5","v5.1-rc6","v5.1-rc7","v5.10","v5.10-rc1","v5.10-rc2","v5.10-rc3","v5.10-rc4","v5.10-rc5","v5.10-rc6","v5.10-rc7","v5.10.1","v5.10.10","v5.10.100","v5.10.101","v5.10.102","v5.10.103","v5.10.104","v5.10.105","v5.10.106","v5.10.107","v5.10.108","v5.10.109","v5.10.11","v5.10.110","v5.10.111","v5.10.112","v5.10.113","v5.10.114","v5.10.115","v5.10.116","v5.10.117","v5.10.118","v5.10.119","v5.10.12","v5.10.120","v5.10.121","v5.10.122","v5.10.123","v5.10.124","v5.10.125","v5.10.126","v5.10.127","v5.10.128","v5.10.129","v5.10.13","v5.10.130","v5.10.131","v5.10.132","v5.10.133","v5.10.134","v5.10.135","v5.10.136","v5.10.137","v5.10.138","v5.10.139","v5.10.14","v5.10.140","v5.10.141","v5.10.142","v5.10.143","v5.10.144","v5.10.145","v5.10.146","v5.10.147","v5.10.148","v5.10.149","v5.10.15","v5.10.150","v5.10.151","v5.10.152","v5.10.153","v5.10.154","v5.10.155","v5.10.156","v5.10.157","v5.10.158","v5.10.159","v5.10.16","v5.10.160","v5.10.161","v5.10.162","v5.10.163","v5.10.164","v5.10.165","v5.10.166","v5.10.167","v5.10.168","v5.10.169","v5.10.17","v5.10.170","v5.10.171","v5.10.172","v5.10.173","v5.10.174","v5.10.175","v5.10.176","v5.10.177","v5.10.178","v5.10.179","v5.10.18","v5.10.180","v5.10.181","v5.10.182","v5.10.183","v5.10.184","v5.10.185","v5.10.186","v5.10.187","v5.10.188","v5.10.189","v5.10.19","v5.10.190","v5.10.191","v5.10.192","v5.10.193","v5.10.194","v5.10.195","v5.10.196","v5.10.197","v5.10.198","v5.10.199","v5.10.2","v5.10.20","v5.10.200","v5.10.201","v5.10.202","v5.10.203","v5.10.204","v5.10.205","v5.10.206","v5.10.207","v5.10.208","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