From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f206.google.com (mail-il1-f206.google.com [209.85.166.206]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A1D112BCF51 for ; Wed, 2 Jul 2025 14:45:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751467536; cv=none; b=dS7cmoR9J9/THZ3Ngt6dIjVMz8i1MwuKH+A/QLgc7scoVBoBOnSMBygRx8SuXfxSUxGdHzkLpYaii/i5BHsdlgtvbMNRwNSQlvf4rVFthswvxvUxAqbV43imPiStR5zfBiSrc+nyOQPC5b/c/y9YSLroTJChkxCRMEoPM191rhs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751467536; c=relaxed/simple; bh=KnRsXxuS3PYx608n/NKuWFSSfCm14iJU6Ylj55wt3Vo=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=bRY90HhTLP1Kub7zEXN4pSmfahc9Dc6L8uf0/fAEVnVeIiXgSWpbWit8e5EX0mmZNiRehaRDYBDOUlwkaWXwgoaA8hCgrRwahFQzeE9q4503VRsJ875bjITqbIfxD8VHi+627QYCUv0A8EDUGgK9zDRL733c34BZebQXN8rcRok= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.206 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f206.google.com with SMTP id e9e14a558f8ab-3ddc5137992so49902895ab.2 for ; Wed, 02 Jul 2025 07:45:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1751467534; x=1752072334; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=b+oqTp2Og2HX7h9r3Aolir1SZcv+7UJxoxCfvKCxR/E=; b=RbsTzsAzahRb9tiTjNz4XdwU8XT47leEZNcMN0WiWbMC5dqzJ3uucoikZC4IG5vY8n sLqN+nwpwSYJXYqFW0m7heBdNPhSpL2ZtDrUmflOdSUQ/+P0/i3c4X0SapuhJUBVl1ZV 8jBqghzpFEvsNR7m+zmZW21lxwxBYZdKwGUReh71vTTzeJaXE5/L2x1H5Hias2y2Avsj GKyOlsMIzEDW8Z79y5hxExa3IbSIYMAmPp85OvO4tTTsRRamZpZ4WSd8dlwoXtW9lTdC HDrB3xxsVIET5KpK/W6gHM3SYTnW/C1Z7Adq9/FO6dVJlvzviylVkmx2YSpwHbXa5hNr /M7Q== X-Forwarded-Encrypted: i=1; AJvYcCVgwR3XLPGzBItcVl9Vo7WHJeIkidrfYd6SwkbAVbAejLheEEHLIYqEqzVm+uttomoPEG/EJ1z/vv5+j4M=@vger.kernel.org X-Gm-Message-State: AOJu0YwAzTFzXKC/MQS8T7tzx/1viVoLklk584u5hsle9+v6/uI2fhoY v7/mG6+qrNOUgWtCfXyhU0iTsdZx+BSF5ZdzkphDHzQtgIaRRXCMqO4TLOofg/Qr2BNeTY0b3gW W9GBh3yY1DGNZG04imsae6QbL2hk1PkciJ0SpDSqErht+JWyb01DEsfwwvaM= X-Google-Smtp-Source: AGHT+IHjo7npVajFLK0WbnSNk9OjJnXgU9PyligF9JndywkNnLdbAESqQAfdNu8AIxGYTLz2dFiruIVNje7kxyXCi8thiNCg+D06 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:18c5:b0:3df:3222:278e with SMTP id e9e14a558f8ab-3e054934f08mr41009735ab.1.1751467533742; Wed, 02 Jul 2025 07:45:33 -0700 (PDT) Date: Wed, 02 Jul 2025 07:45:33 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6865460d.a00a0220.270cb1.0001.GAE@google.com> Subject: [syzbot] [kernel?] general protection fault in __cpa_flush_tlb From: syzbot To: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 1343433ed389 Add linux-next specific files for 20250630 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=10aa93d4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c1ce97baf6bd6397 dashboard link: https://syzkaller.appspot.com/bug?extid=169412e85b1803dfda81 compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10ed648c580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c3387c64e9ec/disk-1343433e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/abf15e85d8dd/vmlinux-1343433e.xz kernel image: https://storage.googleapis.com/syzbot-assets/081c344403bc/bzImage-1343433e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+169412e85b1803dfda81@syzkaller.appspotmail.com ================================================================== BUG: KASAN: out-of-bounds in __cpa_flush_tlb+0x46/0x270 arch/x86/mm/pat/set_memory.c:407 Read of size 8 at addr ffffc90003397920 by task syz-executor/5960 CPU: 0 UID: 0 PID: 5960 Comm: syz-executor Not tainted 6.16.0-rc4-next-20250630-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xd2/0x2b0 mm/kasan/report.c:521 kasan_report+0x118/0x150 mm/kasan/report.c:634 __cpa_flush_tlb+0x46/0x270 arch/x86/mm/pat/set_memory.c:407 csd_do_func kernel/smp.c:134 [inline] __flush_smp_call_function_queue+0x370/0xaa0 kernel/smp.c:540 __sysvec_call_function_single+0xa8/0x3d0 arch/x86/kernel/smp.c:271 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline] sysvec_call_function_single+0x9e/0xc0 arch/x86/kernel/smp.c:266 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709 RIP: 0010:finish_task_switch+0x26b/0x950 kernel/sched/core.c:5181 Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 e9 27 05 00 00 4c 8b 75 d0 4c 89 e7 e8 2f db e0 09 e8 3a 0e 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc9000453f5f8 EFLAGS: 00000282 RAX: 312751dada94af00 RBX: 0000000000000000 RCX: 312751dada94af00 RDX: 0000000000000000 RSI: ffffffff8d992cd0 RDI: ffffffff8be31d00 RBP: ffffc9000453f650 R08: ffffffff8fa17437 R09: 1ffffffff1f42e86 R10: dffffc0000000000 R11: fffffbfff1f42e87 R12: ffff888021ed9e00 R13: dffffc0000000000 R14: ffff888023f2da00 R15: ffff8880b863ab18 context_switch kernel/sched/core.c:5316 [inline] __schedule+0x16fd/0x4d00 kernel/sched/core.c:6696 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6876 preempt_schedule+0xae/0xc0 kernel/sched/core.c:6900 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 idr_preload_end+0x126/0x200 include/linux/idr.h:191 alloc_pid+0x35c/0xab0 kernel/pid.c:241 copy_process+0x198e/0x3c00 kernel/fork.c:2184 kernel_clone+0x21e/0x870 kernel/fork.c:2598 __do_sys_clone kernel/fork.c:2741 [inline] __se_sys_clone kernel/fork.c:2725 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2725 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd22b785193 Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00 RSP: 002b:00007fff68c51808 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd22b785193 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 00005555595c77d0 R11: 0000000000000246 R12: 0000000000000000 R13: 00000000000927c0 R14: 00000000000295d0 R15: 00007fff68c519a0 The buggy address belongs to the virtual mapping at [ffffc90003390000, ffffc90003399000) created by: copy_process+0x54b/0x3c00 kernel/fork.c:1998 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x4 pfn:0x76b10 memcg:ffff88807849f502 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000004 0000000000000000 00000001ffffffff ffff88807849f502 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_ZERO|__GFP_NOWARN), pid 10519, tgid 10519 (syz.1.2188), ts 169318727845, free_ts 167753086937 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1848 prep_new_page mm/page_alloc.c:1856 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3855 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5145 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_frozen_pages_noprof mm/mempolicy.c:2490 [inline] alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2510 vm_area_alloc_pages mm/vmalloc.c:3642 [inline] __vmalloc_area_node mm/vmalloc.c:3720 [inline] __vmalloc_node_range_noprof+0x97d/0x12f0 mm/vmalloc.c:3893 __vmalloc_node_noprof+0xc2/0x110 mm/vmalloc.c:3956 alloc_thread_stack_node kernel/fork.c:310 [inline] dup_task_struct+0x3e7/0x860 kernel/fork.c:876 copy_process+0x54b/0x3c00 kernel/fork.c:1998 kernel_clone+0x21e/0x870 kernel/fork.c:2598 __do_sys_clone3 kernel/fork.c:2902 [inline] __se_sys_clone3+0x256/0x2d0 kernel/fork.c:2881 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 49 tgid 49 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1392 [inline] __free_frozen_pages+0xb80/0xd80 mm/page_alloc.c:2892 pagetable_free include/linux/mm.h:2896 [inline] pagetable_dtor_free include/linux/mm.h:2994 [inline] __tlb_remove_table+0x2d2/0x3b0 include/asm-generic/tlb.h:220 __tlb_remove_table_free mm/mmu_gather.c:227 [inline] tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:290 rcu_do_batch kernel/rcu/tree.c:2582 [inline] rcu_core+0xca8/0x1710 kernel/rcu/tree.c:2838 handle_softirqs+0x286/0x870 kernel/softirq.c:579 do_softirq+0xec/0x180 kernel/softirq.c:480 __local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:407 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_nc_purge_paths+0x318/0x3b0 net/batman-adv/network-coding.c:471 batadv_nc_worker+0x369/0x610 net/batman-adv/network-coding.c:722 process_one_work kernel/workqueue.c:3239 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3322 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3403 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffffc90003397800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90003397880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90003397900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffffc90003397980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90003397a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== ---------------- Code disassembly (best guess): 0: 0f 84 3c 01 00 00 je 0x142 6: 48 85 db test %rbx,%rbx 9: 0f 85 63 01 00 00 jne 0x172 f: e9 27 05 00 00 jmp 0x53b 14: 4c 8b 75 d0 mov -0x30(%rbp),%r14 18: 4c 89 e7 mov %r12,%rdi 1b: e8 2f db e0 09 call 0x9e0db4f 20: e8 3a 0e 36 00 call 0x360e5f 25: fb sti 26: 4c 8b 65 c0 mov -0x40(%rbp),%r12 * 2a: 49 8d bc 24 18 16 00 lea 0x1618(%r12),%rdi <-- trapping instruction 31: 00 32: 48 89 f8 mov %rdi,%rax 35: 48 c1 e8 03 shr $0x3,%rax 39: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax 3e: 84 c0 test %al,%al --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup