hyjorc1

JSC security specialist

155 commits (11mo)

11 security fixes

2 hardening

Summary

hyjorc1 works almost entirely inside JSC, with the heaviest concentration in the Wasm subsystem and secondary lines in Temporal/Intl calendar internals, FastStringifier buffer handling, and occasional backend work (Mul(Neg(n), m) → MNEG/FNMUL); the one flagged security fix sits elsewhere, pinning upstream checks that DFG integer-range-optimization proofs depend on. The recent stream is a sustained build-out of the WASM debugger and its debug server, and the bugs being fixed are validation and state-machine bugs rather than feature work: module lifetime leaks when the debugger is enabled, breakpoints accepted at non-instruction boundaries, decisions made on the patched byte instead of the pre-patch opcode, malformed packets silently defaulted rather than rejected, and a self-deadlock on an unknown thread id. Systematic-variant candidate: the WASM debug server's packet parsing and the breakpoint patch/unpatch bookkeeping — a young surface that takes untrusted input, where several distinct classes of missing-validation bug landed in close succession, which usually means the sweep isn't finished.

Components

JSC

73%

JSC Wasm

22%

WTF

WebCore

WebKit

WebInspector

Security Fix History

1 / 2

Hardening Commits

Recent Commits

1 / 11

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