Bug 2334792 (CVE-2024-56710)

Summary: CVE-2024-56710 kernel: ceph: fix memory leak in ceph_direct_read_write()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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OS: Linux   
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Description OSIDB Bzimport 2024-12-29 09:01:21 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ceph: fix memory leak in ceph_direct_read_write()

The bvecs array which is allocated in iter_get_bvecs_alloc() is leaked
and pages remain pinned if ceph_alloc_sparse_ext_map() fails.

There is no need to delay the allocation of sparse_ext map until after
the bvecs array is set up, so fix this by moving sparse_ext allocation
a bit earlier.  Also, make a similar adjustment in __ceph_sync_read()
for consistency (a leak of the same kind in __ceph_sync_read() has been
addressed differently).
Comment 1 Avinash Hanwate 2024-12-29 10:22:55 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024122913-CVE-2024-56710-78af@gregkh/T