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Red Hat: CVE-2024-26940: kernel: drm/vmwgfx: Create debugfs ttm_resource_manager entry only if needed (Multiple Advisories)

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Red Hat: CVE-2024-26940: kernel: drm/vmwgfx: Create debugfs ttm_resource_manager entry only if needed (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
05/01/2024
Created
08/13/2024
Added
08/12/2024
Modified
12/05/2024

Description

In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Create debugfs ttm_resource_manager entry only if needed The driver creates /sys/kernel/debug/dri/0/mob_ttm even when the corresponding ttm_resource_manager is not allocated. This leads to a crash when trying to read from this file. Add a check to create mob_ttm, system_mob_ttm, and gmr_ttm debug file only when the corresponding ttm_resource_manager is allocated. crash> bt PID: 3133409TASK: ffff8fe4834a5000CPU: 3COMMAND: "grep" #0 [ffffb954506b3b20] machine_kexec at ffffffffb2a6bec3 #1 [ffffb954506b3b78] __crash_kexec at ffffffffb2bb598a #2 [ffffb954506b3c38] crash_kexec at ffffffffb2bb68c1 #3 [ffffb954506b3c50] oops_end at ffffffffb2a2a9b1 #4 [ffffb954506b3c70] no_context at ffffffffb2a7e913 #5 [ffffb954506b3cc8] __bad_area_nosemaphore at ffffffffb2a7ec8c #6 [ffffb954506b3d10] do_page_fault at ffffffffb2a7f887 #7 [ffffb954506b3d40] page_fault at ffffffffb360116e [exception RIP: ttm_resource_manager_debug+0x11] RIP: ffffffffc04afd11RSP: ffffb954506b3df0RFLAGS: 00010246 RAX: ffff8fe41a6d1200RBX: 0000000000000000RCX: 0000000000000940 RDX: 0000000000000000RSI: ffffffffc04b4338RDI: 0000000000000000 RBP: ffffb954506b3e08 R8: ffff8fee3ffad000 R9: 0000000000000000 R10: ffff8fe41a76a000R11: 0000000000000001R12: 00000000ffffffff R13: 0000000000000001R14: ffff8fe5bb6f3900R15: ffff8fe41a6d1200 ORIG_RAX: ffffffffffffffffCS: 0010SS: 0018 #8 [ffffb954506b3e00] ttm_resource_manager_show at ffffffffc04afde7 [ttm] #9 [ffffb954506b3e30] seq_read at ffffffffb2d8f9f3 RIP: 00007f4c4eda8985RSP: 00007ffdbba9e9f8RFLAGS: 00000246 RAX: ffffffffffffffdaRBX: 000000000037e000RCX: 00007f4c4eda8985 RDX: 000000000037e000RSI: 00007f4c41573000RDI: 0000000000000003 RBP: 000000000037e000 R8: 0000000000000000 R9: 000000000037fe30 R10: 0000000000000000R11: 0000000000000246R12: 00007f4c41573000 R13: 0000000000000003R14: 00007f4c41572010R15: 0000000000000003 ORIG_RAX: 0000000000000000CS: 0033SS: 002b

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2024-26940
  • RHSA-2024:5101
  • RHSA-2024:5102
  • RHSA-2024:9315
  • 查看数 696
  • 已创建
  • 最后回复

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