[Bug 2004039] Re: libunwind 1.6.2-0 assumes 4k page sizes and crashes on systems with bigger page sizes

[Tobias Heider]

** Description changed:

- The libunwind version we ship in kinetic crahes on arm64 platforms with page sizes > 4k.
- This was fixed in libunwind upstream. The fix made it into the debian version synced to lunar.
+ [ Impact ]
  
- Debian bug report at https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1026217
- Upstream commit: https://github.com/libunwind/libunwind/commit/2d004eafc77f3c6a4bd9a44b1c35735273fd4e97
+  * On kernels with page size > 4K xorg (and presumably other applications
+    relying on libunwind) crashes on startup. This affects anyone
+    running the official arm64 generic-64k kernel or custom non 4k kernels
+    (as used by e.g. apple silicon).
+ 
+ [ Test Plan ]
+ 
+  * Make sure Xorg works on a variety of different archs and kernels with   
+    different page sizes. 
+ 
+ [ Where problems could occur ]
+ 
+  * We will have to make sure the fixed version still works with 4k
+    kernels. The patch is already widely in use so the risk seems low if
+    we test properly.
+ 
+ [ Other Info ]
+  
+  * The lunar version ships the bug fix synced from debian 
+  
+  * Debian bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1026217
+ 
+  * Upstream fix:
+ https://github.com/libunwind/libunwind/commit/e85b65cec757ef589f28957d0c6c21c498a03bdf

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https://bugs.launchpad.net/bugs/2004039

Title:
  libunwind 1.6.2-0 assumes 4k page sizes and crashes on systems with
  bigger page sizes

Status in libunwind package in Ubuntu:
  New
Status in libunwind source package in Kinetic:
  New

Bug description:
  [ Impact ]

   * On kernels with page size > 4K xorg (and presumably other applications
     relying on libunwind) crashes on startup. This affects anyone
     running the official arm64 generic-64k kernel or custom non 4k kernels
     (as used by e.g. apple silicon).

  [ Test Plan ]

   * Make sure Xorg works on a variety of different archs and kernels with   
     different page sizes. 

  [ Where problems could occur ]

   * We will have to make sure the fixed version still works with 4k
     kernels. The patch is already widely in use so the risk seems low if
     we test properly.

  [ Other Info ]
   
   * The lunar version ships the bug fix synced from debian 
   
   * Debian bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1026217

   * Upstream fix:
  https://github.com/libunwind/libunwind/commit/e85b65cec757ef589f28957d0c6c21c498a03bdf

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