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Alma Linux: CVE-2024-40914: Important: kernel security update (ALSA-2024-5928)

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Alma Linux: CVE-2024-40914: Important: kernel security update (ALSA-2024-5928)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
07/12/2024
Created
11/05/2024
Added
11/04/2024
Modified
11/04/2024

Description

In the Linux kernel, the following vulnerability has been resolved: mm/huge_memory: don't unpoison huge_zero_folio When I did memory failure tests recently, below panic occurs: kernel BUG at include/linux/mm.h:1135! invalid opcode: 0000 [#1] PREEMPT SMP NOPTI CPU: 9 PID: 137 Comm: kswapd1 Not tainted 6.9.0-rc4-00491-gd5ce28f156fe-dirty #14 RIP: 0010:shrink_huge_zero_page_scan+0x168/0x1a0 RSP: 0018:ffff9933c6c57bd0 EFLAGS: 00000246 RAX: 000000000000003e RBX: 0000000000000000 RCX: ffff88f61fc5c9c8 RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff88f61fc5c9c0 RBP: ffffcd7c446b0000 R08: ffffffff9a9405f0 R09: 0000000000005492 R10: 00000000000030ea R11: ffffffff9a9405f0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88e703c4ac00 FS: 0000000000000000(0000) GS:ffff88f61fc40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f4da6e9878 CR3: 0000000c71048000 CR4: 00000000000006f0 Call Trace: <TASK> do_shrink_slab+0x14f/0x6a0 shrink_slab+0xca/0x8c0 shrink_node+0x2d0/0x7d0 balance_pgdat+0x33a/0x720 kswapd+0x1f3/0x410 kthread+0xd5/0x100 ret_from_fork+0x2f/0x50 ret_from_fork_asm+0x1a/0x30 </TASK> Modules linked in: mce_inject hwpoison_inject ---[ end trace 0000000000000000 ]--- RIP: 0010:shrink_huge_zero_page_scan+0x168/0x1a0 RSP: 0018:ffff9933c6c57bd0 EFLAGS: 00000246 RAX: 000000000000003e RBX: 0000000000000000 RCX: ffff88f61fc5c9c8 RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff88f61fc5c9c0 RBP: ffffcd7c446b0000 R08: ffffffff9a9405f0 R09: 0000000000005492 R10: 00000000000030ea R11: ffffffff9a9405f0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88e703c4ac00 FS: 0000000000000000(0000) GS:ffff88f61fc40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f4da6e9878 CR3: 0000000c71048000 CR4: 00000000000006f0 The root cause is that HWPoison flag will be set for huge_zero_folio without increasing the folio refcnt. But then unpoison_memory() will decrease the folio refcnt unexpectedly as it appears like a successfully hwpoisoned folio leading to VM_BUG_ON_PAGE(page_ref_count(page) == 0) when releasing huge_zero_folio. Skip unpoisoning huge_zero_folio in unpoison_memory() to fix this issue. We're not prepared to unpoison huge_zero_folio yet.

Solution(s)

  • alma-upgrade-bpftool
  • alma-upgrade-kernel
  • alma-upgrade-kernel-64k
  • alma-upgrade-kernel-64k-core
  • alma-upgrade-kernel-64k-debug
  • alma-upgrade-kernel-64k-debug-core
  • alma-upgrade-kernel-64k-debug-devel
  • alma-upgrade-kernel-64k-debug-devel-matched
  • alma-upgrade-kernel-64k-debug-modules
  • alma-upgrade-kernel-64k-debug-modules-core
  • alma-upgrade-kernel-64k-debug-modules-extra
  • alma-upgrade-kernel-64k-devel
  • alma-upgrade-kernel-64k-devel-matched
  • alma-upgrade-kernel-64k-modules
  • alma-upgrade-kernel-64k-modules-core
  • alma-upgrade-kernel-64k-modules-extra
  • alma-upgrade-kernel-abi-stablelists
  • alma-upgrade-kernel-core
  • alma-upgrade-kernel-cross-headers
  • alma-upgrade-kernel-debug
  • alma-upgrade-kernel-debug-core
  • alma-upgrade-kernel-debug-devel
  • alma-upgrade-kernel-debug-devel-matched
  • alma-upgrade-kernel-debug-modules
  • alma-upgrade-kernel-debug-modules-core
  • alma-upgrade-kernel-debug-modules-extra
  • alma-upgrade-kernel-debug-uki-virt
  • alma-upgrade-kernel-devel
  • alma-upgrade-kernel-devel-matched
  • alma-upgrade-kernel-doc
  • alma-upgrade-kernel-headers
  • alma-upgrade-kernel-modules
  • alma-upgrade-kernel-modules-core
  • alma-upgrade-kernel-modules-extra
  • alma-upgrade-kernel-rt
  • alma-upgrade-kernel-rt-core
  • alma-upgrade-kernel-rt-debug
  • alma-upgrade-kernel-rt-debug-core
  • alma-upgrade-kernel-rt-debug-devel
  • alma-upgrade-kernel-rt-debug-modules
  • alma-upgrade-kernel-rt-debug-modules-core
  • alma-upgrade-kernel-rt-debug-modules-extra
  • alma-upgrade-kernel-rt-devel
  • alma-upgrade-kernel-rt-modules
  • alma-upgrade-kernel-rt-modules-core
  • alma-upgrade-kernel-rt-modules-extra
  • alma-upgrade-kernel-tools
  • alma-upgrade-kernel-tools-libs
  • alma-upgrade-kernel-tools-libs-devel
  • alma-upgrade-kernel-uki-virt
  • alma-upgrade-kernel-zfcpdump
  • alma-upgrade-kernel-zfcpdump-core
  • alma-upgrade-kernel-zfcpdump-devel
  • alma-upgrade-kernel-zfcpdump-devel-matched
  • alma-upgrade-kernel-zfcpdump-modules
  • alma-upgrade-kernel-zfcpdump-modules-core
  • alma-upgrade-kernel-zfcpdump-modules-extra
  • alma-upgrade-libperf
  • alma-upgrade-perf
  • alma-upgrade-python3-perf
  • alma-upgrade-rtla
  • alma-upgrade-rv

References

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