2024-03-25 14:45:09

by Uros Bizjak

Subject: [PATCH] x86/percpu: Disable named address spaces for KCSAN

-fsanitize=thread (KCSAN) is at the moment incompatible
with named address spaces in a similar way as KASAN -
see GCC PR sanitizer/111736:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111736

The patch disables named address spaces with KCSAN.

Reported-by: kernel test robot <[email protected]>
Signed-off-by: Uros Bizjak <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Josh Poimboeuf <[email protected]>

Closes: https://lore.kernel.org/oe-lkp/[email protected]
---
arch/x86/Kconfig | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 39886bab943a..4fff6ed46e90 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2439,6 +2439,8 @@ config USE_X86_SEG_SUPPORT
# with named address spaces - see GCC PR sanitizer/111736.
#
depends on !KASAN
+ # -fsanitize=thread (KCSAN) is also incompatible.
+ depends on !KCSAN

config CC_HAS_SLS
def_bool $(cc-option,-mharden-sls=all)
--
2.44.0

2024-03-25 20:58:40

by tip-bot2 for Tony Luck

Subject: [tip: x86/urgent] x86/percpu: Disable named address spaces for KCSAN

The following commit has been merged into the x86/urgent branch of tip:

Commit-ID: b6540de9b5c867b4c8bc31225db181cc017d8cc7
Gitweb: https://git.kernel.org/tip/b6540de9b5c867b4c8bc31225db181cc017d8cc7
Author: Uros Bizjak <[email protected]>
AuthorDate: Mon, 25 Mar 2024 12:01:09 +01:00
Committer: Ingo Molnar <[email protected]>
CommitterDate: Mon, 25 Mar 2024 12:17:01 +01:00

x86/percpu: Disable named address spaces for KCSAN

-fsanitize=thread (KCSAN) is at the moment incompatible
with named address spaces in a similar way as KASAN -
see GCC PR sanitizer/111736:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111736

The patch disables named address spaces with KCSAN.

Reported-by: kernel test robot <[email protected]>
Signed-off-by: Uros Bizjak <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Cc: Linus Torvalds <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
---
arch/x86/Kconfig | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 39886ba..4fff6ed 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2439,6 +2439,8 @@ config USE_X86_SEG_SUPPORT
# with named address spaces - see GCC PR sanitizer/111736.
#
depends on !KASAN
+ # -fsanitize=thread (KCSAN) is also incompatible.
+ depends on !KCSAN

config CC_HAS_SLS
def_bool $(cc-option,-mharden-sls=all)