Date: Sun, 10 Jan 2021 02:49:24 +0000 From: bugzilla-noreply@freebsd.org To: threads@FreeBSD.org Subject: [Bug 252549] statically linked threaded binaries have executable thread stacks Message-ID: <bug-252549-13406@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252549 Bug ID: 252549 Summary: statically linked threaded binaries have executable thread stacks Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: threads Assignee: threads@FreeBSD.org Reporter: emaste@freebsd.org The stack created by pthread_create in a statically linked binary has RWX protection, regardless of the binary's desired stack (via PT_GNU_STACK). Initial stack has expected protection. See https://reviews.freebsd.org/D28050 for the discovery of this issue. lib/libc/gen/dlfcn.c provides a weak _rtld_get_stack_prot for statically linked binaries: #pragma weak _rtld_get_stack_prot int _rtld_get_stack_prot(void) { return (PROT_EXEC | PROT_READ | PROT_WRITE); } -- You are receiving this mail because: You are the assignee for the bug.help
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