CVE-2024-57875

Description

In the Linux kernel, the following vulnerability has been resolved: block: RCU protect disk->conv_zones_bitmap Ensure that a disk revalidation changing the conventional zones bitmap of a disk does not cause invalid memory references when using the disk_zone_is_conv() helper by RCU protecting the disk->conv_zones_bitmap pointer. disk_zone_is_conv() is modified to operate under the RCU read lock and the function disk_set_conv_zones_bitmap() is added to update a disk conv_zones_bitmap pointer using rcu_replace_pointer() with the disk zone_wplugs_lock spinlock held. disk_free_zone_resources() is modified to call disk_update_zone_resources() with a NULL bitmap pointer to free the disk conv_zones_bitmap. disk_set_conv_zones_bitmap() is also used in disk_update_zone_resources() to set the new (revalidated) bitmap and free the old one.

Reserved 2025-01-11 | Published 2025-01-11 | Updated 2025-01-20 | Assigner Linux

Product status

Default status
unaffected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 493326c4f10cc71a42c27fdc97ce112182ee4cbc
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d7cb6d7414ea1b33536fa6d11805cb8dceec1f97
affected

Default status
affected

6.12.5
unaffected

6.13
unaffected

References

git.kernel.org/...c/493326c4f10cc71a42c27fdc97ce112182ee4cbc

git.kernel.org/...c/d7cb6d7414ea1b33536fa6d11805cb8dceec1f97

cve.org (CVE-2024-57875)

nvd.nist.gov (CVE-2024-57875)

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