[Bug 217049] New: KASAN: unify kasan_arch_is_ready with kasan_enabled

[bugzill...@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217049

Bug ID: 217049
Summary: KASAN: unify kasan_arch_is_ready with kasan_enabled
Product: Memory Management
Version: 2.5
Kernel Version: upstream
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Sanitizers
Assignee: mm_san...@kernel-bugs.kernel.org
Reporter: andre...@gmail.com
CC: kasa...@googlegroups.com
Regression: No

From [1]:

Both functions seem to be serving a similar purpose: for example this
patch adds kasan_arch_is_ready into __kasan_poison_vmalloc, which is
called by kasan_poison_vmalloc when kasan_enabled returns true.

The kasan_enabled is only implemented for HW_TAGS right now, but it
should be easy enough to make it work other cases by
kasan_flag_enabled into common.c and adding __wrappers for
shadow-related functions into include/linux/kasan.h. This way
architectures won't need to define their own static key and duplicate
the functionality.

[1]
https://lore.kernel.org/linux-mm/CA+fCnZcnwN-FGbteoMwFeHrG...@mail.gmail.com/

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[bugzill...@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217049

--- Comment #1 from Andrey Konovalov (andre...@gmail.com) ---
While at it, also fix [1].

[1] https://lore.kernel.org/all/202307310656...@intel.com/

[bugzill...@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217049

--- Comment #2 from Andrey Konovalov (andre...@gmail.com) ---
See [1] for a related discussion.

[1]
https://lore.kernel.org/linux-mm/CA+fCnZf7JqTH46C7oG2Wk9Nn...@mail.gmail.com/

[bugzill...@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217049

Sabyrzhan Tasbolatov (snov...@gmail.com) changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |snov...@gmail.com

--- Comment #3 from Sabyrzhan Tasbolatov (snov...@gmail.com) ---
Hello, I have sent the patch series:

https://lore.kernel.org/all/20250625095224.1...@gmail.com/

[bugzill...@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217049

--- Comment #4 from Sabyrzhan Tasbolatov (snov...@gmail.com) ---
Hello,

This can be closed. Related commits in the mainline are:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1e338f4d99e6814ede16bad1db1cc463aad8032c
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e45085f2673b165687a3874d8e868437683fa8e4

Thanks!