The patch can be used as a workaround for now:
diff --git a/util/osdep.c b/util/osdep.c
index 66d01b9160..76be8c295b 100644
--- a/util/osdep.c
+++ b/util/osdep.c
@@ -110,6 +110,9 @@ int qemu_mprotect_none(void *addr, size_t size)
 {
 #ifdef _WIN32
     return qemu_mprotect__osdep(addr, size, PAGE_NOACCESS);
+#elif defined(__APPLE__) && defined(__arm64__)
+    /* Workaround mprotect (RWX->NONE) issue on Big Sur 11.2 */
+    return 0;
 #else
     return qemu_mprotect__osdep(addr, size, PROT_NONE);
 #endif

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1914849

Title:
  mprotect fails after MacOS 11.2 on arm mac

Status in QEMU:
  New

Bug description:
  I got the following error when I ran qemu on arm mac(MacOS 11.2).

  ```
  $ ./qemu-system-x86_64
  qemu-system-x86_64: qemu_mprotect__osdep: mprotect failed: Permission denied
  **
  ERROR:../tcg/tcg.c:844:tcg_region_init: assertion failed: (!rc)
  Bail out! ERROR:../tcg/tcg.c:844:tcg_region_init: assertion failed: (!rc)
  [1]    34898 abort      ./qemu-system-x86_64
  ```

  I tested the same version of qemu on intel mac(MacOS 11.2), but it
  works fine.

  And my friend told me that they did not have this error with MacOS
  11.1.

  So, I think it is CPU architecture or an OS version dependent error.

  
  Environment:

  Qemu commit id: d0dddab40e472ba62b5f43f11cc7dba085dabe71
  OS: MacOS 11.2(20D64)
  Hardware: MacBook Air (M1, 2020)

  
  How to build:

  ```
  mkdir build/
  cd build/
  ../configure --target-list=aarch64-softmmu,x86_64-softmmu
  make
  ```

  
  How to reproduce:

  ```
  ./qemu-system-x86_64
  ```

  
  Error message:

  ```
  $ ./qemu-system-x86_64
  qemu-system-x86_64: qemu_mprotect__osdep: mprotect failed: Permission denied
  **
  ERROR:../tcg/tcg.c:844:tcg_region_init: assertion failed: (!rc)
  Bail out! ERROR:../tcg/tcg.c:844:tcg_region_init: assertion failed: (!rc)
  [1]    34898 abort      ./qemu-system-x86_64
  ```

To manage notifications about this bug go to:
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Patchew URL: https://patchew.org/QEMU/161280769492.2878.8851519112088854609.malone@chaenomeles.canonical.com/



Hi,

This series seems to have some coding style problems. See output below for
more information:

Type: series
Message-id: 161280769492.2878.8851519112088854609.malone@chaenomeles.canonical.com
Subject: [Bug 1914849] Re: mprotect fails after MacOS 11.2 on arm mac

=== TEST SCRIPT BEGIN ===
#!/bin/bash
git rev-parse base > /dev/null || exit 0
git config --local diff.renamelimit 0
git config --local diff.renames True
git config --local diff.algorithm histogram
./scripts/checkpatch.pl --mailback base..
=== TEST SCRIPT END ===

Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
From https://github.com/patchew-project/qemu
 * [new tag]         patchew/161280769492.2878.8851519112088854609.malone@chaenomeles.canonical.com -> patchew/161280769492.2878.8851519112088854609.malone@chaenomeles.canonical.com
 - [tag update]      patchew/20210129005845.416272-1-wuhaotsh@google.com -> patchew/20210129005845.416272-1-wuhaotsh@google.com
 - [tag update]      patchew/20210208024625.271018-1-richard.henderson@linaro.org -> patchew/20210208024625.271018-1-richard.henderson@linaro.org
 - [tag update]      patchew/20210208163339.1159514-1-berrange@redhat.com -> patchew/20210208163339.1159514-1-berrange@redhat.com
Switched to a new branch 'test'
f2c73d0 mprotect fails after MacOS 11.2 on arm mac

=== OUTPUT BEGIN ===
ERROR: Missing Signed-off-by: line(s)

total: 1 errors, 0 warnings, 9 lines checked

Commit f2c73d03916c (mprotect fails after MacOS 11.2 on arm mac) has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.
=== OUTPUT END ===

Test command exited with code: 1


The full log is available at
http://patchew.org/logs/161280769492.2878.8851519112088854609.malone@chaenomeles.canonical.com/testing.checkpatch/?type=message.
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