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From: Pawel Biernacki <kaktus@FreeBSD.org>
Date: Thu, 26 Nov 2020 09:07:45 +0000 (UTC)
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Subject: svn commit: r368053 - head/lib/libsysdecode
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Author: kaktus
Date: Thu Nov 26 09:07:45 2020
New Revision: 368053
URL: https://svnweb.freebsd.org/changeset/base/368053

Log:
  libsysdecode: account for invalid protection flags
  
  Reported by:	jhb
  MFC with:	r368022

Modified:
  head/lib/libsysdecode/flags.c

Modified: head/lib/libsysdecode/flags.c
==============================================================================
--- head/lib/libsysdecode/flags.c	Thu Nov 26 07:34:20 2020	(r368052)
+++ head/lib/libsysdecode/flags.c	Thu Nov 26 09:07:45 2020	(r368053)
@@ -662,7 +662,7 @@ sysdecode_mmap_prot(FILE *fp, int prot, int *rem)
 
 	printed = false;
 	protm = PROT_MAX_EXTRACT(prot);
-	prot = PROT_EXTRACT(prot);
+	prot &= ~PROT_MAX(protm);
 	if (protm != 0) {
 		fputs("PROT_MAX(", fp);
 		printed = print_mask_int(fp, mmapprot, protm, rem);