https://sourceware.org/bugzilla/show_bug.cgi?id=24960
Bug ID: 24960
Summary: Memory leak from disassembler
Product: binutils
Version: 2.33 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: p.antoine at catenacyber dot fr
Target Milestone: ---
Created attachment 11971
--> https://sourceware.org/bugzilla/attachment.cgi?id=11971&action=edit
Fix
Binutils is version from commit 217d2eaa69c2a5d58cdfd11619c4f2e41c986826
I have been fuzzing binutils disassembler, you can find the fuzz target here
https://github.com/google/oss-fuzz/pull/2617
There are memory leaks when initializing disassembly from function
`disassembler` for the fields `insn_sets` and sometimes `private_data`
Fixing these leaks will make fuzzing more efficient.
Attached is a proposed fix with a new function `disassemble_release:
For `private_data`, it is used sometimes as an allocated memory which should be
freed, sometimes as a temporary local structure (which should not be freed)
So I added a field `priv_status` to indicate if we should free it
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