cve-2022-49001
Vulnerability from cvelistv5
Published
2024-10-21 20:06
Modified
2024-12-19 08:12
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: riscv: fix race when vmap stack overflow Currently, when detecting vmap stack overflow, riscv firstly switches to the so called shadow stack, then use this shadow stack to call the get_overflow_stack() to get the overflow stack. However, there's a race here if two or more harts use the same shadow stack at the same time. To solve this race, we introduce spin_shadow_stack atomic var, which will be swap between its own address and 0 in atomic way, when the var is set, it means the shadow_stack is being used; when the var is cleared, it means the shadow_stack isn't being used. [Palmer: Add AQ to the swap, and also some comments.]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7e1864332fbc1b993659eab7974da9fe8bf8c128Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/879fabc5a95401d9bce357e4b1d24ae4a360a81fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ac00301adb19df54f2eae1efc4bad7447c0156cePatch
Impacted products
Vendor Product Version
Linux Linux Version: 31da94c25aea835ceac00575a9fd206c5a833fed
Version: 31da94c25aea835ceac00575a9fd206c5a833fed
Version: 31da94c25aea835ceac00575a9fd206c5a833fed
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   Linux Linux Version: 5.14
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