[Bug 252549] statically linked threaded binaries have executable thread stacks
bugzilla-noreply at freebsd.org
bugzilla-noreply at freebsd.org
Sun Jan 10 02:49:24 UTC 2021
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 at FreeBSD.org
Reporter: emaste at 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.
More information about the freebsd-threads
mailing list