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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2022-49842

ASoC: core: Fix use-after-free in snd_soc_exit()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: core: Fix use-after-free in snd_soc_exit() KASAN reports a use-after-free: BUG: KASAN: use-after-free in device_del+0xb5b/0xc60 Read of size 8 at addr ffff888008655050 by task rmmod/387 CPU: 2 PID: 387 Comm: rmmod Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) Call Trace: <TASK> dump_stack_lvl+0x79/0x9a print_report+0x17f/0x47b kasan_report+0xbb/0xf0 device_del+0xb5b/0xc60 platform_device_del.part.0+0x24/0x200 platform_device_unregister+0x2e/0x40 snd_soc_exit+0xa/0x22 [snd_soc_core] __do_sys_delete_module.constprop.0+0x34f/0x5b0 do_syscall_64+0x3a/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd ... </TASK> It's bacause in snd_soc_init(), snd_soc_util_init() is possble to fail, but its ret is ignored, which makes soc_dummy_dev unregistered twice. snd_soc_init() snd_soc_util_init() platform_device_register_simple(soc_dummy_dev) platform_driver_register() # fail platform_device_unregister(soc_dummy_dev) platform_driver_register() # success ... snd_soc_exit() snd_soc_util_exit() # soc_dummy_dev will be unregistered for second time To fix it, handle error and stop snd_soc_init() when util_init() fail. Also clean debugfs when util_init() or driver_register() fail.

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

  • fb257897bf20c5f0e1df584bb5b874e811651263 to < 41fad4f712e081acdfde8b59847f9f66eaf407a0affected
  • fb257897bf20c5f0e1df584bb5b874e811651263 to < 90bbdf30a51e42378cb23a312005a022794b8e1eaffected
  • fb257897bf20c5f0e1df584bb5b874e811651263 to < a3365e62239dc064019a244bde5686ac18527c22affected
  • fb257897bf20c5f0e1df584bb5b874e811651263 to < 2ec3f558db343b045a7c7419cdbaec266b8ac1a7affected
  • fb257897bf20c5f0e1df584bb5b874e811651263 to < 8d21554ec7680e9585fb852d933203c3db60dad1affected
  • fb257897bf20c5f0e1df584bb5b874e811651263 to < 34eee4189bcebbd5f6a2ff25ef0cb893ad33d51eaffected
  • fb257897bf20c5f0e1df584bb5b874e811651263 to < c5674bd073c0fd9f620ca550c5ff08d0d429bdd9affected
  • fb257897bf20c5f0e1df584bb5b874e811651263 to < 6ec27c53886c8963729885bcf2dd996eba2767a7affected

Linux Linux

Default version status: affected

  • 3.0affected
  • 0 to < 3.0unaffected
  • 4.9.334 to ≤ 4.9.*unaffected
  • 4.14.300 to ≤ 4.14.*unaffected
  • 4.19.267 to ≤ 4.19.*unaffected
  • 5.4.225 to ≤ 5.4.*unaffected
  • 5.10.156 to ≤ 5.10.*unaffected
  • 5.15.80 to ≤ 5.15.*unaffected
  • 6.0.10 to ≤ 6.0.*unaffected
  • 6.1 to ≤ *unaffected

References