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unzero'd padding bytes in struct reg and struct fpreg (both machine dependent)

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leak kernel stack contents.
from Andrew Griffiths at Calif
This commit is contained in:
deraadt
2026-05-28 17:24:32 +00:00
parent b8c7370936
commit 3136a9f960
1 changed files with 3 additions and 1 deletions
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sys/kern/exec_elf.c
+3 -1
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@@ -1,4 +1,4 @@
/* $OpenBSD: exec_elf.c,v 1.197 2026/05/11 06:09:45 jsg Exp $ */
/* $OpenBSD: exec_elf.c,v 1.198 2026/05/28 17:24:32 deraadt Exp $ */
/*
* Copyright (c) 1996 Per Fogelstrom
@@ -1554,6 +1554,7 @@ coredump_note_elf(struct proc *p, void *iocookie, size_t *sizep)
notesize = sizeof(nhdr) + elfround(namesize) + elfround(sizeof(intreg));
if (iocookie) {
memset(&intreg, 0, sizeof(intreg));
error = process_read_regs(p, &intreg);
if (error)
return (error);
@@ -1573,6 +1574,7 @@ coredump_note_elf(struct proc *p, void *iocookie, size_t *sizep)
#ifdef PT_GETFPREGS
notesize = sizeof(nhdr) + elfround(namesize) + elfround(sizeof(freg));
if (iocookie) {
memset(&freg, 0, sizeof(freg));
error = process_read_fpregs(p, &freg);
if (error)
return (error);