Rocky Linux: CVE-2024-35797: kernel (RLSA-2024-6567)
Description
In the Linux kernel, the following vulnerability has been resolved: mm: cachestat: fix two shmem bugs When cachestat on shmem races with swapping and invalidation, there are two possible bugs: 1) A swapin error can have resulted in a poisoned swap entry in the shmem inode's xarray. Calling get_shadow_from_swap_cache() on it will result in an out-of-bounds access to swapper_spaces[]. Validate the entry with non_swap_entry() before going further. 2) When we find a valid swap entry in the shmem's inode, the shadow entry in the swapcache might not exist yet: swap IO is still in progress and we're before __remove_mapping; swapin, invalidation, or swapoff have removed the shadow from swapcache after we saw the shmem swap entry. This will send a NULL to workingset_test_recent(). The latter purely operates on pointer bits, so it won't crash - node 0, memcg ID 0, eviction timestamp 0, etc. are all valid inputs - but it's a bogus test. In theory that could result in a false "recently evicted" count. Such a false positive wouldn't be the end of the world. But for code clarity and (future) robustness, be explicit about this case. Bail on get_shadow_from_swap_cache() returning NULL.
Solution(s)
- rocky-upgrade-bpftool
- rocky-upgrade-bpftool-debuginfo
- rocky-upgrade-kernel
- rocky-upgrade-kernel-core
- rocky-upgrade-kernel-cross-headers
- rocky-upgrade-kernel-debug
- rocky-upgrade-kernel-debug-core
- rocky-upgrade-kernel-debug-debuginfo
- rocky-upgrade-kernel-debug-devel
- rocky-upgrade-kernel-debug-devel-matched
- rocky-upgrade-kernel-debug-modules
- rocky-upgrade-kernel-debug-modules-core
- rocky-upgrade-kernel-debug-modules-extra
- rocky-upgrade-kernel-debug-uki-virt
- rocky-upgrade-kernel-debuginfo
- rocky-upgrade-kernel-devel
- rocky-upgrade-kernel-devel-matched
- rocky-upgrade-kernel-headers
- rocky-upgrade-kernel-modules
- rocky-upgrade-kernel-modules-core
- rocky-upgrade-kernel-modules-extra
- rocky-upgrade-kernel-rt
- rocky-upgrade-kernel-rt-core
- rocky-upgrade-kernel-rt-debug
- rocky-upgrade-kernel-rt-debug-core
- rocky-upgrade-kernel-rt-debug-debuginfo
- rocky-upgrade-kernel-rt-debug-devel
- rocky-upgrade-kernel-rt-debug-kvm
- rocky-upgrade-kernel-rt-debug-modules
- rocky-upgrade-kernel-rt-debug-modules-core
- rocky-upgrade-kernel-rt-debug-modules-extra
- rocky-upgrade-kernel-rt-debuginfo
- rocky-upgrade-kernel-rt-devel
- rocky-upgrade-kernel-rt-kvm
- rocky-upgrade-kernel-rt-modules
- rocky-upgrade-kernel-rt-modules-core
- rocky-upgrade-kernel-rt-modules-extra
- rocky-upgrade-kernel-tools
- rocky-upgrade-kernel-tools-debuginfo
- rocky-upgrade-kernel-tools-libs
- rocky-upgrade-kernel-tools-libs-devel
- rocky-upgrade-kernel-uki-virt
- rocky-upgrade-kernel-zfcpdump
- rocky-upgrade-kernel-zfcpdump-core
- rocky-upgrade-kernel-zfcpdump-debuginfo
- rocky-upgrade-kernel-zfcpdump-devel
- rocky-upgrade-kernel-zfcpdump-devel-matched
- rocky-upgrade-kernel-zfcpdump-modules
- rocky-upgrade-kernel-zfcpdump-modules-core
- rocky-upgrade-kernel-zfcpdump-modules-extra
- rocky-upgrade-libperf
- rocky-upgrade-libperf-debuginfo
- rocky-upgrade-perf
- rocky-upgrade-perf-debuginfo
- rocky-upgrade-python3-perf
- rocky-upgrade-python3-perf-debuginfo
- rocky-upgrade-rtla
- rocky-upgrade-rv
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