Date: Fri, 31 Jul 2026 17:57:37 +0000 From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: b9eaf9b7cef2 - main - libc: Reject static ELF exectables with PT_TLS segments were filesz > memsz Message-ID: <6a6ce211.3f35c.64cfbffb@gitrepo.freebsd.org>
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The branch main has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=b9eaf9b7cef25228e8c20e3819f1b7be94f486aa commit b9eaf9b7cef25228e8c20e3819f1b7be94f486aa Author: John Baldwin <jhb@FreeBSD.org> AuthorDate: 2026-07-31 17:52:34 +0000 Commit: John Baldwin <jhb@FreeBSD.org> CommitDate: 2026-07-31 17:52:34 +0000 libc: Reject static ELF exectables with PT_TLS segments were filesz > memsz Reviewed by: jrtc27 Differential Revision: https://reviews.freebsd.org/D58558 --- lib/libc/gen/tls.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/lib/libc/gen/tls.c b/lib/libc/gen/tls.c index b26b13d45589..e9f256d5e369 100644 --- a/lib/libc/gen/tls.c +++ b/lib/libc/gen/tls.c @@ -435,6 +435,10 @@ _init_tls(void) for (i = 0; (unsigned) i < phnum; i++) { if (phdr[i].p_type == PT_TLS) { + if (phdr[i].p_memsz < phdr[i].p_filesz) { + tls_msg("_init_tls: invalid PT_TLS segment.\n"); + abort(); + } libc_tls_static_space = roundup2(phdr[i].p_memsz, phdr[i].p_align); libc_tls_init_size = phdr[i].p_filesz;home | help
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