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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, by this commit, we noticed below config diff with its parent ( * 3742b7b32f28b x86: Make software tag-based kasan available * 0ef701bc87cdd x86: runtime_const used for KASAN_SHADOW_END <-- parent ) @@ -293,7 +293,7 @@ CONFIG_ARCH_HAS_CPU_RELAX=y CONFIG_ARCH_HIBERNATION_POSSIBLE=y CONFIG_ARCH_SUSPEND_POSSIBLE=y CONFIG_AUDIT_ARCH=y -CONFIG_KASAN_SHADOW_OFFSET=0xdffffc0000000000 +CONFIG_KASAN_SHADOW_SCALE_SHIFT=4 CONFIG_ARCH_SUPPORTS_UPROBES=y CONFIG_FIX_EARLYCON_MEM=y CONFIG_PGTABLE_LEVELS=5 @@ -5387,13 +5387,15 @@ CONFIG_DEBUG_KMAP_LOCAL=y CONFIG_ARCH_SUPPORTS_KMAP_LOCAL_FORCE_MAP=y CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP=y CONFIG_HAVE_ARCH_KASAN=y +CONFIG_HAVE_ARCH_KASAN_SW_TAGS=y CONFIG_HAVE_ARCH_KASAN_VMALLOC=y CONFIG_CC_HAS_KASAN_GENERIC=y CONFIG_CC_HAS_KASAN_SW_TAGS=y CONFIG_CC_HAS_WORKING_NOSANITIZE_ADDRESS=y CONFIG_KASAN=y CONFIG_CC_HAS_KASAN_MEMINTRINSIC_PREFIX=y -CONFIG_KASAN_GENERIC=y +# CONFIG_KASAN_GENERIC is not set +CONFIG_KASAN_SW_TAGS=y # CONFIG_KASAN_OUTLINE is not set CONFIG_KASAN_INLINE=y # CONFIG_KASAN_STACK is not set below full report FYI. kernel test robot noticed "Oops:general_protection_fault,probably_for_non-canonical_address#:#[##]PREEMPT_KASAN" on: commit: 3742b7b32f28b574e97da7c4f50593877b99e95c ("[PATCH v2 14/14] x86: Make software tag-based kasan available") url: https://github.com/intel-lab-lkp/linux/commits/Maciej-Wieczor-Retman/kasan-sw_tags-Use-arithmetic-shift-for-shadow-computation/20250218-162135 base: https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git 882b86fd4e0d49bf91148dbadcdbece19ded40e6 patch link: https://lore.kernel.org/all/d266338a0eae1f673802e41d7230c4c92c3532b3.1739866028.git.maciej.wieczor-retman@intel.com/ patch subject: [PATCH v2 14/14] x86: Make software tag-based kasan available in testcase: boot config: x86_64-randconfig-161-20250219 compiler: clang-19 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) +--------------------------------------------------------------------------------------+------------+------------+ | | 0ef701bc87 | 3742b7b32f | +--------------------------------------------------------------------------------------+------------+------------+ | boot_successes | 21 | 0 | | boot_failures | 0 | 18 | | Oops:general_protection_fault,probably_for_non-canonical_address#:#[##]PREEMPT_KASAN | 0 | 17 | | RIP:stack_depot_save_flags | 0 | 17 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 17 | | KASAN:maybe_wild-memory-access_in_range[#-#] | 0 | 2 | +--------------------------------------------------------------------------------------+------------+------------+ If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202502201048.208452a-lkp@intel.com [ 11.050670][ T0] Oops: general protection fault, probably for non-canonical address 0xfbff888100044018: 0000 [#1] PREEMPT KASAN [ 11.050681][ T0] KASAN: maybe wild-memory-access in range [0xbff8c81000440180-0xbff8c8100044018f] [ 11.050690][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper Tainted: G T 6.14.0-rc2-00036-g3742b7b32f28 #2 [ 11.050700][ T0] Tainted: [T]=RANDSTRUCT [ 11.050704][ T0] RIP: 0010:stack_depot_save_flags (kbuild/src/smatch/lib/stackdepot.c:335) [ 11.050720][ T0] Code: 85 48 85 c0 0f 84 cf 01 00 00 48 8b 0d 35 b0 35 02 4c 8d 24 08 41 81 e7 ff ff 01 00 89 ca c1 e2 0d 81 e2 00 00 fe 07 44 09 fa <89> 54 08 18 4c 89 24 08 4c 89 64 08 08 48 03 4d c0 48 89 0d 04 b0 All code ======== 0: 85 48 85 test %ecx,-0x7b(%rax) 3: c0 0f 84 rorb $0x84,(%rdi) 6: cf iret 7: 01 00 add %eax,(%rax) 9: 00 48 8b add %cl,-0x75(%rax) c: 0d 35 b0 35 02 or $0x235b035,%eax 11: 4c 8d 24 08 lea (%rax,%rcx,1),%r12 15: 41 81 e7 ff ff 01 00 and $0x1ffff,%r15d 1c: 89 ca mov %ecx,%edx 1e: c1 e2 0d shl $0xd,%edx 21: 81 e2 00 00 fe 07 and $0x7fe0000,%edx 27: 44 09 fa or %r15d,%edx 2a:* 89 54 08 18 mov %edx,0x18(%rax,%rcx,1) <-- trapping instruction 2e: 4c 89 24 08 mov %r12,(%rax,%rcx,1) 32: 4c 89 64 08 08 mov %r12,0x8(%rax,%rcx,1) 37: 48 03 4d c0 add -0x40(%rbp),%rcx 3b: 48 rex.W 3c: 89 .byte 0x89 3d: 0d .byte 0xd 3e: 04 b0 add $0xb0,%al Code starting with the faulting instruction =========================================== 0: 89 54 08 18 mov %edx,0x18(%rax,%rcx,1) 4: 4c 89 24 08 mov %r12,(%rax,%rcx,1) 8: 4c 89 64 08 08 mov %r12,0x8(%rax,%rcx,1) d: 48 03 4d c0 add -0x40(%rbp),%rcx 11: 48 rex.W 12: 89 .byte 0x89 13: 0d .byte 0xd 14: 04 b0 add $0xb0,%al [ 11.050728][ T0] RSP: 0000:ffffffff84207b08 EFLAGS: 00010002 [ 11.050735][ T0] RAX: fbff888100044000 RBX: 0000000000000000 RCX: 0000000000000000 [ 11.050765][ T0] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000 [ 11.050770][ T0] RBP: ffffffff84207b60 R08: ffff8883ee081360 R09: fbff888100044000 [ 11.050774][ T0] R10: 0000000000000000 R11: 0000000000000000 R12: fbff888100044000 [ 11.050779][ T0] R13: 00000000f44e9436 R14: ffffffff84207b70 R15: 0000000000000001 [ 11.050784][ T0] FS: 0000000000000000(0000) GS:ffffffff842fc000(0000) knlGS:0000000000000000 [ 11.050791][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 11.050796][ T0] CR2: ffff88843ffff000 CR3: 00000000042cd000 CR4: 00000000000000b0 [ 11.050804][ T0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 11.050808][ T0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 11.050813][ T0] Call Trace: [ 11.050816][ T0] [ 11.050821][ T0] ? __die_body (kbuild/src/smatch/arch/x86/kernel/dumpstack.c:421) [ 11.050831][ T0] ? die_addr (kbuild/src/smatch/arch/x86/kernel/dumpstack.c:?) [ 11.050838][ T0] ? exc_general_protection (kbuild/src/smatch/arch/x86/kernel/traps.c:789) [ 11.050862][ T0] ? asm_exc_general_protection (kbuild/src/smatch/arch/x86/include/asm/idtentry.h:617) The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250220/202502201048.208452a-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki