clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns kfence: initialized - using 2097152 bytes for 255 objects at 0xffff88823be00000-0xffff88823c000000 Console: colour VGA+ 80x25 printk: console [ttyS0] enabled printk: console [ttyS0] enabled printk: legacy bootconsole [earlyser0] disabled printk: legacy bootconsole [earlyser0] disabled Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar ... MAX_LOCKDEP_SUBCLASSES: 8 ... MAX_LOCK_DEPTH: 48 ... MAX_LOCKDEP_KEYS: 8192 ... CLASSHASH_SIZE: 4096 ... MAX_LOCKDEP_ENTRIES: 1048576 ... MAX_LOCKDEP_CHAINS: 1048576 ... CHAINHASH_SIZE: 524288 memory used by lock dependency info: 106625 kB memory used for stack traces: 8320 kB per task-struct memory footprint: 1920 bytes mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl ACPI: Core revision 20260408 APIC: Switch to symmetric I/O mode setup x2apic enabled APIC: Switched APIC routing to: physical x2apic ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1 clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x1fb63109b96, max_idle_ns: 440795265316 ns Calibrating delay loop (skipped) preset value.. 4399.99 BogoMIPS (lpj=21999980) Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8 Last level dTLB entries: 4KB 64, 2MB 32, 4MB 32, 1GB 4 mitigations: Enabled attack vectors: user_kernel, user_user, guest_host, guest_guest, SMT mitigations: auto Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl Spectre V2 : Mitigation: IBRS RETBleed: Mitigation: IBRS ITS: Mitigation: Aligned branch/return thunks Spectre V2 : User space: Mitigation: STIBP via prctl MDS: Mitigation: Clear CPU buffers TAA: Mitigation: Clear CPU buffers MMIO Stale Data: Vulnerable: Clear CPU buffers attempted, no microcode Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization Spectre V2 : Spectre v2 / SpectreRSB: Filling RSB on context switch and VMEXIT Spectre V2 : Enabling IBPB for BPF Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier active return thunk: its_return_thunk Spectre V2 : Spectre BHI mitigation: SW BHB clearing on syscall and VM exit x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers' x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers' x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers' x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256 x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format. ------------[ cut here ]------------ CPA detected W^X violation: 8000000000000023 -> 0000000000000023 range: 0xffffffffa0000000 - 0xffffffffa0000fff PFN 1b200 WARNING: arch/x86/mm/pat/set_memory.c:725 at verify_rwx arch/x86/mm/pat/set_memory.c:722 [inline], CPU#0: swapper/0/0 WARNING: arch/x86/mm/pat/set_memory.c:725 at __change_page_attr arch/x86/mm/pat/set_memory.c:1892 [inline], CPU#0: swapper/0/0 WARNING: arch/x86/mm/pat/set_memory.c:725 at __change_page_attr_set_clr+0x1d69/0x2820 arch/x86/mm/pat/set_memory.c:2064, CPU#0: swapper/0/0 Modules linked in: CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/08/2026 RIP: 0010:verify_rwx arch/x86/mm/pat/set_memory.c:722 [inline] RIP: 0010:__change_page_attr arch/x86/mm/pat/set_memory.c:1892 [inline] RIP: 0010:__change_page_attr_set_clr+0x1d79/0x2820 arch/x86/mm/pat/set_memory.c:2064 Code: 00 00 e8 9a f5 4d 00 48 8b 4c 24 30 4c 8d 81 ff 0f 00 00 48 8d 3d 97 03 03 0f 48 8b b4 24 a0 00 00 00 4c 89 f2 4c 8b 4c 24 50 <67> 48 0f b9 3a e9 8d 00 00 00 e8 68 f5 4d 00 4c 89 f8 48 c1 e8 03 RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293 RAX: ffffffff817aa2e6 RBX: 800000001b200023 RCX: ffffffffa0000000 RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907da690 RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 000000000001b200 R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000 R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002 FS: 0000000000000000(0000) GS:ffff888124c9a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88823ffff000 CR3: 000000000eb48000 CR4: 00000000003506f0 Call Trace: change_page_attr_set_clr+0x398/0x11d0 arch/x86/mm/pat/set_memory.c:2152 change_page_attr_clear arch/x86/mm/pat/set_memory.c:2190 [inline] set_memory_x+0xd6/0x110 arch/x86/mm/pat/set_memory.c:2351 its_alloc arch/x86/kernel/alternative.c:236 [inline] its_allocate_thunk arch/x86/kernel/alternative.c:258 [inline] emit_its_trampoline arch/x86/kernel/alternative.c:834 [inline] patch_retpoline arch/x86/kernel/alternative.c:945 [inline] apply_retpolines+0x8e9/0x15a0 arch/x86/kernel/alternative.c:1010 alternative_instructions+0x3a/0x100 arch/x86/kernel/alternative.c:2287 arch_cpu_finalize_init+0xb2/0x1f0 arch/x86/kernel/cpu/common.c:2645 start_kernel+0x315/0x3e0 init/main.c:1160 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x137/0x1b0 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x157 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: e8 9a f5 4d 00 call 0x4df5a1 7: 48 8b 4c 24 30 mov 0x30(%rsp),%rcx c: 4c 8d 81 ff 0f 00 00 lea 0xfff(%rcx),%r8 13: 48 8d 3d 97 03 03 0f lea 0xf030397(%rip),%rdi # 0xf0303b1 1a: 48 8b b4 24 a0 00 00 mov 0xa0(%rsp),%rsi 21: 00 22: 4c 89 f2 mov %r14,%rdx 25: 4c 8b 4c 24 50 mov 0x50(%rsp),%r9 * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: e9 8d 00 00 00 jmp 0xc1 34: e8 68 f5 4d 00 call 0x4df5a1 39: 4c 89 f8 mov %r15,%rax 3c: 48 c1 e8 03 shr $0x3,%rax