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SUSE: CVE-2024-42161: SUSE Linux Security Advisory

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SUSE: CVE-2024-42161: SUSE Linux Security Advisory

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
07/30/2024
Created
08/14/2024
Added
08/14/2024
Modified
08/14/2024

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Avoid uninitialized value in BPF_CORE_READ_BITFIELD [Changes from V1: - Use a default branch in the switch statement to initialize `val'.] GCC warns that `val' may be used uninitialized in the BPF_CRE_READ_BITFIELD macro, defined in bpf_core_read.h as: [...] unsigned long long val; \ [...] \ switch (__CORE_RELO(s, field, BYTE_SIZE)) { \ case 1: val = *(const unsigned char *)p; break; \ case 2: val = *(const unsigned short *)p; break; \ case 4: val = *(const unsigned int *)p; break; \ case 8: val = *(const unsigned long long *)p; break; \ } \ [...] val; \ } \ This patch adds a default entry in the switch statement that sets `val' to zero in order to avoid the warning, and random values to be used in case __builtin_preserve_field_info returns unexpected values for BPF_FIELD_BYTE_SIZE. Tested in bpf-next master. No regressions.

Solution(s)

  • suse-upgrade-cluster-md-kmp-rt
  • suse-upgrade-dlm-kmp-rt
  • suse-upgrade-gfs2-kmp-rt
  • suse-upgrade-kernel-devel-rt
  • suse-upgrade-kernel-rt
  • suse-upgrade-kernel-rt-devel
  • suse-upgrade-kernel-rt-extra
  • suse-upgrade-kernel-rt-livepatch
  • suse-upgrade-kernel-rt-livepatch-devel
  • suse-upgrade-kernel-rt-optional
  • suse-upgrade-kernel-rt-vdso
  • suse-upgrade-kernel-rt_debug
  • suse-upgrade-kernel-rt_debug-devel
  • suse-upgrade-kernel-rt_debug-livepatch-devel
  • suse-upgrade-kernel-rt_debug-vdso
  • suse-upgrade-kernel-source-rt
  • suse-upgrade-kernel-syms-rt
  • suse-upgrade-kselftests-kmp-rt
  • suse-upgrade-ocfs2-kmp-rt
  • suse-upgrade-reiserfs-kmp-rt

References

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