{"id":"CVE-2024-36925","summary":"swiotlb: initialise restricted pool list_head when SWIOTLB_DYNAMIC=y","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nswiotlb: initialise restricted pool list_head when SWIOTLB_DYNAMIC=y\n\nUsing restricted DMA pools (CONFIG_DMA_RESTRICTED_POOL=y) in conjunction\nwith dynamic SWIOTLB (CONFIG_SWIOTLB_DYNAMIC=y) leads to the following\ncrash when initialising the restricted pools at boot-time:\n\n  | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008\n  | Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP\n  | pc : rmem_swiotlb_device_init+0xfc/0x1ec\n  | lr : rmem_swiotlb_device_init+0xf0/0x1ec\n  | Call trace:\n  |  rmem_swiotlb_device_init+0xfc/0x1ec\n  |  of_reserved_mem_device_init_by_idx+0x18c/0x238\n  |  of_dma_configure_id+0x31c/0x33c\n  |  platform_dma_configure+0x34/0x80\n\nfaddr2line reveals that the crash is in the list validation code:\n\n  include/linux/list.h:83\n  include/linux/rculist.h:79\n  include/linux/rculist.h:106\n  kernel/dma/swiotlb.c:306\n  kernel/dma/swiotlb.c:1695\n\nbecause add_mem_pool() is trying to list_add_rcu() to a NULL\n'mem-\u003epools'.\n\nFix the crash by initialising the 'mem-\u003epools' list_head in\nrmem_swiotlb_device_init() before calling add_mem_pool().","modified":"2026-04-02T12:16:34.256062Z","published":"2024-05-30T15:29:19.111Z","related":["MGASA-2024-0263","MGASA-2024-0266"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36925.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/75961ffb5cb3e5196f19cae7683f35cc88b50800"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f2a6b3ed20f2dea4cb645abc6a73c4595662adca"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f62e0fefcdfe2c05ccb1aa80521a69524eea9c84"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36925.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-36925"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1aaa736815eb04f4dae3f0b3e977b2a0677a4cfb"},{"fixed":"f2a6b3ed20f2dea4cb645abc6a73c4595662adca"},{"fixed":"f62e0fefcdfe2c05ccb1aa80521a69524eea9c84"},{"fixed":"75961ffb5cb3e5196f19cae7683f35cc88b50800"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-36925.json"}}],"schema_version":"1.7.5"}