CVE-2022-49549
Description
In the Linux kernel, the following vulnerability has been resolved: x86/MCE/AMD: Fix memory leak when threshold_create_bank() fails In mce_threshold_create_device(), if threshold_create_bank() fails, the previously allocated threshold banks array @bp will be leaked because the call to mce_threshold_remove_device() will not free it. This happens because mce_threshold_remove_device() fetches the pointer through the threshold_banks per-CPU variable but bp is written there only after the bank creation is successful, and not before, when threshold_create_bank() fails. Add a helper which unwinds all the bank creation work previously done and pass into it the previously allocated threshold banks array for freeing. [ bp: Massage. ]
How to fix
- linux linux_kernel5.10.121, 5.15.46, 5.17.14, 5.18.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.8 ≤ v < 5.10.121, 5.11 ≤ v < 5.15.46, 5.16 ≤ v < 5.17.14, 5.18 ≤ v < 5.18.3 | 5.10.121, 5.15.46, 5.17.14, 5.18.3 |
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