[Bug 2069821] Re: [VROC] [Ub 24.04] mdadm: buffer overflow detected

[Hector CAO]

** Changed in: mdadm (Ubuntu Noble)
       Status: Confirmed => In Progress

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Title:
  [VROC] [Ub 24.04] mdadm: buffer overflow detected

Status in mdadm package in Ubuntu:
  Fix Released
Status in mdadm source package in Noble:
  In Progress
Status in mdadm source package in Oracular:
  Fix Released

Bug description:
  [ Impact ]

  mdadm crashes sporadically with error *** buffer overflow detected ***
  at some invokations:

  - mdadm --detail-pl
  - mdadm -CR /dev/md0 -l1 -n2 /dev/nvme0n1 /dev/nvme1n1
  *** buffer overflow detected ***: terminated
  Aborted (core dumped)

  [ Test Plan ]

  - Install mdadm
  - Issue this command several times:
  mdadm --detail-pl

  [ Where problems could occur ]

  The fix is very small and basically it replaces the unsafe functions call
  to sprintf by calling snprintf for Intel platforms (platform_intel.c)
  I do not expect high regression risk.

  [ Other Info ]

  mdadm is built with FORTIFY_SOURCE=3 (as it is done in Ubuntu 24.04).
  and it uses the unsafe function sprintf() that will cause the
  buffer-overflow error

  It is fixed in mdadm upstream:
  https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/commit/?id=827e1870f320545796d907f50af594e901399417

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