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| author | Peter Zhu <[email protected]> | 2024-12-12 14:03:07 -0500 |
|---|---|---|
| committer | Peter Zhu <[email protected]> | 2024-12-13 10:10:03 -0500 |
| commit | 92dd9734a967c20e628c8f77c5ce700058dcd58c (patch) | |
| tree | e51b99d8cb385bba8be2f1ea158d4deb1f5afe51 /yjit/src | |
| parent | 6cde41bc52cb411a3259349b23fab2cd05789b01 (diff) | |
Fix use-after-free in ep in Proc#dup for ifunc procs
[Bug #20950]
ifunc proc has the ep allocated in the cfunc_proc_t which is the data of
the TypedData object. If an ifunc proc is duplicated, the ep points to
the ep of the source object. If the source object is freed, then the ep
of the duplicated object now points to a freed memory region. If we try
to use the ep we could crash.
For example, the following script crashes:
p = { a: 1 }.to_proc
100.times do
p = p.dup
GC.start
p.call
rescue ArgumentError
end
This commit changes ifunc proc to also duplicate the ep when it is duplicated.
Notes
Notes:
Merged: https://github.com/ruby/ruby/pull/12319
Diffstat (limited to 'yjit/src')
0 files changed, 0 insertions, 0 deletions