cve-2024-36925
Vulnerability from cvelistv5
Published
2024-05-30 15:29
Modified
2024-12-19 09:02
Severity ?
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().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/75961ffb5cb3e5196f19cae7683f35cc88b50800Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f2a6b3ed20f2dea4cb645abc6a73c4595662adcaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f62e0fefcdfe2c05ccb1aa80521a69524eea9c84Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/75961ffb5cb3e5196f19cae7683f35cc88b50800Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f2a6b3ed20f2dea4cb645abc6a73c4595662adcaPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f62e0fefcdfe2c05ccb1aa80521a69524eea9c84Patch
Impacted products
Vendor Product Version
Linux Linux Version: 1aaa736815eb04f4dae3f0b3e977b2a0677a4cfb
Version: 1aaa736815eb04f4dae3f0b3e977b2a0677a4cfb
Version: 1aaa736815eb04f4dae3f0b3e977b2a0677a4cfb
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   Linux Linux Version: 6.6
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