Public bug reported:
[ Impact ]
When trying to compile Noble’s kernel 6.8.0-108 with KASAN enabled the
following compile-time error appeared:
/build/noble/mm/kasan/common.c: In function '__kasan_unpoison_vmap_areas':
/build/noble/mm/kasan/common.c:566:34: error: 'KASAN_VMALLOC_KEEP_TAG'
undeclared (first use in this function); did you mean 'KASAN_VMALLOC_INIT'?
566 | if (WARN_ON_ONCE(flags & KASAN_VMALLOC_KEEP_TAG))
| ^~~~~~~~~~~~~~~~~~~~~~
/build/noble/include/asm-generic/bug.h:111:32: note: in definition of macro
'WARN_ON_ONCE'
111 | int __ret_warn_on = !!(condition); \
| ^~~~~~~~~
/build/noble/mm/kasan/common.c:566:34: note: each undeclared identifier is
reported only once for each function it appears in
566 | if (WARN_ON_ONCE(flags & KASAN_VMALLOC_KEEP_TAG))
| ^~~~~~~~~~~~~~~~~~~~~~
/build/noble/include/asm-generic/bug.h:111:32: note: in definition of macro
'WARN_ON_ONCE'
111 | int __ret_warn_on = !!(condition); \
| ^~~~~~~~~
CC [M] samples/ftrace/ftrace-direct-too.o
[ Fix ]
The error is due to an upstream stable update which missed the very first
commit of the patchset:
-
https://lore.kernel.org/all/a2a1889754be3d97b8919cb2d3d099d12461f814.1765978969.git.m.wieczorret...@pm.me/T/#u
To fix it, it is necessary to backport
- 007f5da43b3d (“mm/kasan: fix incorrect unpoisoning in vrealloc for KASAN”).
[ Test Case ]
Compile the kernel with KASAN enabled.
[ Regression Potential ]
No regression potential. The kernel is already
not compiling with kasan enabled.
The fix allows the kernel to compile correctly.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Noble)
Importance: Undecided
Assignee: Massimiliano Pellizzer (mpellizzer)
Status: In Progress
** Changed in: linux (Ubuntu)
Status: New => In Progress
** Also affects: linux (Ubuntu Noble)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Noble)
Status: New => In Progress
** Changed in: linux (Ubuntu Noble)
Assignee: (unassigned) => Massimiliano Pellizzer (mpellizzer)
** Changed in: linux (Ubuntu)
Status: In Progress => Invalid
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https://bugs.launchpad.net/bugs/2144914
Title:
Noble kernel 6.8.0-108 does not compile when KASAN enabled
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