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CVE PROGRAM SOURCE RECORDUnscored

CVE-2022-50084

dm raid: fix address sanitizer warning in raid_status

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: dm raid: fix address sanitizer warning in raid_status There is this warning when using a kernel with the address sanitizer and running this testsuite: https://gitlab.com/cki-project/kernel-tests/-/tree/main/storage/swraid/scsi_raid ================================================================== BUG: KASAN: slab-out-of-bounds in raid_status+0x1747/0x2820 [dm_raid] Read of size 4 at addr ffff888079d2c7e8 by task lvcreate/13319 CPU: 0 PID: 13319 Comm: lvcreate Not tainted 5.18.0-0.rc3.<snip> #1 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 Call Trace: <TASK> dump_stack_lvl+0x6a/0x9c print_address_description.constprop.0+0x1f/0x1e0 print_report.cold+0x55/0x244 kasan_report+0xc9/0x100 raid_status+0x1747/0x2820 [dm_raid] dm_ima_measure_on_table_load+0x4b8/0xca0 [dm_mod] table_load+0x35c/0x630 [dm_mod] ctl_ioctl+0x411/0x630 [dm_mod] dm_ctl_ioctl+0xa/0x10 [dm_mod] __x64_sys_ioctl+0x12a/0x1a0 do_syscall_64+0x5b/0x80 The warning is caused by reading conf->max_nr_stripes in raid_status. The code in raid_status reads mddev->private, casts it to struct r5conf and reads the entry max_nr_stripes. However, if we have different raid type than 4/5/6, mddev->private doesn't point to struct r5conf; it may point to struct r0conf, struct r1conf, struct r10conf or struct mpconf. If we cast a pointer to one of these structs to struct r5conf, we will be reading invalid memory and KASAN warns about it. Fix this bug by reading struct r5conf only if raid type is 4, 5 or 6.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 3a1c1ef2fd62087c3d6521de217ddb9360776658 to < 1ae0ebfb576b72c2ef400917a5484ebe7892d80baffected
  • 3a1c1ef2fd62087c3d6521de217ddb9360776658 to < 90b006da40dd42285b24dd3c940d2c32aca9a70baffected
  • 3a1c1ef2fd62087c3d6521de217ddb9360776658 to < b856ce5f4b55f752144baf17e9d5c415072652c5affected
  • 3a1c1ef2fd62087c3d6521de217ddb9360776658 to < cb583ca6125ac64c98e9d65128e95ebb5be7d322affected
  • 3a1c1ef2fd62087c3d6521de217ddb9360776658 to < 49dba30638e091120256a9e89125340795f034dcaffected
  • 3a1c1ef2fd62087c3d6521de217ddb9360776658 to < 4c233811a49578634d10a5e70a9dfa569d451e94affected
  • 3a1c1ef2fd62087c3d6521de217ddb9360776658 to < d8971b595d7adac3421c21f59918241f1574061eaffected
  • 3a1c1ef2fd62087c3d6521de217ddb9360776658 to < b4c6c07c92b6cba2bf3cb2dfa722debeaf8a8abeaffected
  • 3a1c1ef2fd62087c3d6521de217ddb9360776658 to < 1fbeea217d8f297fe0e0956a1516d14ba97d0396affected

Linux Linux

Default version status: affected

  • 4.8affected
  • 0 to < 4.8unaffected
  • 4.9.326 to ≤ 4.9.*unaffected
  • 4.14.291 to ≤ 4.14.*unaffected
  • 4.19.256 to ≤ 4.19.*unaffected
  • 5.4.211 to ≤ 5.4.*unaffected
  • 5.10.137 to ≤ 5.10.*unaffected
  • 5.15.61 to ≤ 5.15.*unaffected
  • 5.18.18 to ≤ 5.18.*unaffected
  • 5.19.2 to ≤ 5.19.*unaffected
  • 6.0 to ≤ *unaffected

References