CVE-2024-36925 (GCVE-0-2024-36925)

Vulnerability from cvelistv5 – Published: 2024-05-30 15:29 – Updated: 2025-05-04 09:12
VLAI?
Title
swiotlb: initialise restricted pool list_head when SWIOTLB_DYNAMIC=y
Summary
In the Linux kernel, the following vulnerability has been resolved: swiotlb: initialise restricted pool list_head when SWIOTLB_DYNAMIC=y Using restricted DMA pools (CONFIG_DMA_RESTRICTED_POOL=y) in conjunction with dynamic SWIOTLB (CONFIG_SWIOTLB_DYNAMIC=y) leads to the following crash when initialising the restricted pools at boot-time: | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 | Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP | pc : rmem_swiotlb_device_init+0xfc/0x1ec | lr : rmem_swiotlb_device_init+0xf0/0x1ec | Call trace: | rmem_swiotlb_device_init+0xfc/0x1ec | of_reserved_mem_device_init_by_idx+0x18c/0x238 | of_dma_configure_id+0x31c/0x33c | platform_dma_configure+0x34/0x80 faddr2line reveals that the crash is in the list validation code: include/linux/list.h:83 include/linux/rculist.h:79 include/linux/rculist.h:106 kernel/dma/swiotlb.c:306 kernel/dma/swiotlb.c:1695 because add_mem_pool() is trying to list_add_rcu() to a NULL 'mem->pools'. Fix the crash by initialising the 'mem->pools' list_head in rmem_swiotlb_device_init() before calling add_mem_pool().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1aaa736815eb04f4dae3f0b3e977b2a0677a4cfb , < f2a6b3ed20f2dea4cb645abc6a73c4595662adca (git)
Affected: 1aaa736815eb04f4dae3f0b3e977b2a0677a4cfb , < f62e0fefcdfe2c05ccb1aa80521a69524eea9c84 (git)
Affected: 1aaa736815eb04f4dae3f0b3e977b2a0677a4cfb , < 75961ffb5cb3e5196f19cae7683f35cc88b50800 (git)
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    Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.31 , ≤ 6.6.* (semver)
Unaffected: 6.8.10 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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