perf: RISC-V: store available counter mask as bitmap
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.6.160, 6.12.111, 6.18.53, 7.2.7
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: perf: RISC-V: store available counter mask as bitmap The available-counter mask was a single unsigned long, but iteration uses RISCV_MAX_COUNTERS, which is 64. On RV32 that reads past the object. Filling with an unsigned-long bit at index 32 and above is also wrong. Use DECLARE_BITMAP and set_bit/bitmap helpers. Walk each bitmap word into CFG_MATCH when checking events, when allocating an index, and when stopping all counters. Set the counter base to i times BITS_PER_LONG. Share the CFG_MATCH ecall through a small helper so the 32-bit argument split is not duplicated. On qemu-system-riscv32 the probe bitmap has bits above XLEN set, so the first word alone is not enough. [pjw@kernel.org: updated to apply; fixed checkpatch.pl issues]
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From e9991434596f5373dfd75857b445eb92a9253c56 · fixed in 5a1b6379eed5b13eac0228b605b0bed988e547e9; From e9991434596f5373dfd75857b445eb92a9253c56 · fixed in 143668c424772979a45118dc9cc9c2c13a35f41d; From e9991434596f5373dfd75857b445eb92a9253c56 · fixed in 9bec7beaed074bcae4181fde9ff9dfbe4e7b0957; From e9991434596f5373dfd75857b445eb92a9253c56 · fixed in e5481db31f4654e9a1254d5d467d9b1ff2f8b1cb; From e9991434596f5373dfd75857b445eb92a9253c56 · fixed in 6809da6e9c08ccc9a09cb0a48c61471679274aaa
- Linux Linux
5.18
- KernelLinux
From 5.18.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.111; From 6.13.0 · fixed in 6.18.53; From 6.19.0 · fixed in 7.2.7