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f30188c468
[PPCMergeStringPool] Only replace constant once (#92996) In #88846 I changed this code to use RAUW to perform the replacement instead of manual updates -- but kept the outer loop, which means we try to perform RAUW once per user. However, some of the users might be freed by the RAUW operation, resulting in use-after-free. The case where this happens is constant users where the replacement might result in the destruction of the original constant. Fixes https://github.com/llvm/llvm-project/issues/92991. This fixes a possible crash when building crypto/openssh/sshkey.c for PowerPC targets. Reported by: cperciva PR: 276104 MFC after: 3 days |
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