[Bug 259970] sys.kern.coredump_phnum_test.coredump_phnum fails with ASLR on by default
Date: Sun, 28 Nov 2021 02:57:03 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259970 --- Comment #5 from commit-hook@FreeBSD.org --- A commit in branch stable/12 references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=d3a7b75bbcb5171d7eda9d712437efd46bb7605b commit d3a7b75bbcb5171d7eda9d712437efd46bb7605b Author: Ed Maste <emaste@FreeBSD.org> AuthorDate: 2021-11-21 17:17:20 +0000 Commit: Ed Maste <emaste@FreeBSD.org> CommitDate: 2021-11-28 02:55:46 +0000 Fix coredump_phnum test with ASLR enabled coredump_phnum intends to generate a core file with many PT_LOAD segments. Previously it called mmap() in a loop with alternating protections, relying on each mapping following the previous, to produce a core file with many page-sized PT_LOAD segments. With ASLR on we no longer have this property of each mmap() following the previous. Instead, perform a single allocation, and then use mprotect() to set alternating pages to PROT_READ. PR: 259970 Reported by: lwhsu, mw Reviewed by: kib MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D33070 (cherry picked from commit 8ec4c5dae32765701ac70811455084efd1570c32) (cherry picked from commit ee2e925603e42897fbabe1b24208d27bdcaae786) tests/sys/kern/coredump_phnum_helper.c | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-) -- You are receiving this mail because: You are the assignee for the bug.