From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f80.google.com (mail-ot1-f80.google.com [209.85.210.80]) (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 4259217A300 for ; Tue, 20 Jan 2026 02:52:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768877551; cv=none; b=HNhDBA7AaB9SqF+NBXmG8AG5kmGO4S4BHRNLabwPh0quqAp9NC1j4MobgcRaK1aNfT6rneqn6e0kASnLifeEACjRLO5V1AVRcs3S5wvDF+grKoAF9Xemy4ZZ8yOeBrDsuWWlJMfXaTZFhvonztSz6NTKlmemQAiydNklbfoleyE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768877551; c=relaxed/simple; bh=Oh73X5+NQ2jDCCin2sbq8dmzEg6Dok30Nv8VWC+3OWo=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=jg6Q2rx6bWwZzxcQFOpOcV2T0OkLV+K9XCAMeVOL4YxweiF6flJLp9eN0FhUl72bwL+6JnDeoNj0c/TlRrIWzY6iIsA+fQixpIRqin0vN0Z5PdVwEFqapgp4KB0T/mlQ+rK4wGuTfB37Qyx4rAZtK++wUDpR1rx87+RivFhbGj8= 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=209.85.210.80 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-ot1-f80.google.com with SMTP id 46e09a7af769-7cfcc64fb5aso4814806a34.3 for ; Mon, 19 Jan 2026 18:52:29 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768877548; x=1769482348; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=/G5DWevz9BYgcyAlcdYIBASIOjStNMz7iH3Bs0VvPXQ=; b=a/d+aj3C1PiAF1QAzpM67+iRvXRQpTUe4j68tqbFWcjqfrP7rpDiMtRnZ9CFWXPT0q l+owuweFkh7Ts2dIR23f3OdSuxkYnS5aqmxKZkMyKaZEyTlnpY/wto7l8jrEtPJEt38M POsu8GgHANEoix5Yj6yQxfwVkvvS9DRA60zomq0QrgrjlhbEjBFaoDcUUXe2pbN118M2 RBmCHwSfKBWksd+20qn3iH5ZqiVwBNa5/RGn3DkrptEVK2u0el8gqFQIa5wCSObCqJlE qJX68ykj+bI+R1dTw/2Sa/C+Kingbw4OMMpjzxw+GkjXGlUGPdfoCQi87PMOZkqxAXLC knYQ== X-Forwarded-Encrypted: i=1; AJvYcCWRh+BzyRk4gRiYHNhNYYqukeBNdZ8HCgEjBsLp3rCCAZAUpzLt1rBeFXOuJKQBjrpKthIgzJKIfDZj6zk=@vger.kernel.org X-Gm-Message-State: AOJu0Yz/tFf4wZ5L4rY8J5czLgwpnrwQgZDxMtdfoF3U+TMnkGi/XdEp rzyjOROXxpBfGjNtidk4woVnE9RJMJ/gsg9+3AfBLUDIdN/AWqQJMUzjTr2l2Wd3BpMs2LiBC8z Q889bErsvplNmiE4WdWUAPqe273kk1CnoRM9bv6tMCAFFrFic9FvtdJ/XEPw= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:6ae4:b0:659:9a49:8e8a with SMTP id 006d021491bc7-662affa1216mr230770eaf.14.1768877548186; Mon, 19 Jan 2026 18:52:28 -0800 (PST) Date: Mon, 19 Jan 2026 18:52:28 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <696eedec.a00a0220.203946.0001.GAE@google.com> Subject: [syzbot] [input?] KASAN: stack-out-of-bounds Read in ft260_smbus_write From: syzbot To: bentiss@kernel.org, jikos@kernel.org, linux-i2c@vger.kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, michael.zaidman@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 603c05a1639f Merge tag 'nfs-for-6.19-2' of git://git.linux.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=120d339a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1859476832863c41 dashboard link: https://syzkaller.appspot.com/bug?extid=64ca69977b37604cd6d9 compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=161e0852580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13115522580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b694f12a8d6f/disk-603c05a1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/91efc898c41a/vmlinux-603c05a1.xz kernel image: https://storage.googleapis.com/syzbot-assets/d0cbdf66f29d/bzImage-603c05a1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+64ca69977b37604cd6d9@syzkaller.appspotmail.com ================================================================== BUG: KASAN: stack-out-of-bounds in ft260_smbus_write+0x19b/0x2f0 drivers/hid/hid-ft260.c:486 Read of size 42 at addr ffffc90003427d81 by task syz.2.65/6119 CPU: 0 UID: 0 PID: 6119 Comm: syz.2.65 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xcd/0x630 mm/kasan/report.c:482 kasan_report+0xe0/0x110 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:194 [inline] kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:200 __asan_memcpy+0x23/0x60 mm/kasan/shadow.c:105 ft260_smbus_write+0x19b/0x2f0 drivers/hid/hid-ft260.c:486 ft260_smbus_xfer+0x22c/0x640 drivers/hid/hid-ft260.c:736 __i2c_smbus_xfer drivers/i2c/i2c-core-smbus.c:591 [inline] __i2c_smbus_xfer+0x4f0/0xf60 drivers/i2c/i2c-core-smbus.c:554 i2c_smbus_xfer drivers/i2c/i2c-core-smbus.c:546 [inline] i2c_smbus_xfer+0x200/0x3c0 drivers/i2c/i2c-core-smbus.c:536 i2cdev_ioctl_smbus+0x237/0x990 drivers/i2c/i2c-dev.c:389 i2cdev_ioctl+0x361/0x840 drivers/i2c/i2c-dev.c:478 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f88dd98f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffeebbe43a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f88ddbe5fa0 RCX: 00007f88dd98f749 RDX: 0000200000000200 RSI: 0000000000000720 RDI: 0000000000000004 RBP: 00007f88dda13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f88ddbe5fa0 R14: 00007f88ddbe5fa0 R15: 0000000000000003 The buggy address belongs to stack of task syz.2.65/6119 and is located at offset 49 in frame: i2cdev_ioctl_smbus+0x0/0x990 drivers/i2c/i2c-dev.c:632 This frame has 1 object: [48, 82) 'temp' The buggy address belongs to a 8-page vmalloc region starting at 0xffffc90003420000 allocated at kernel_clone+0xfc/0x910 kernel/fork.c:2651 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x22397 memcg:ffff888074f11282 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 ffffea000088e5c8 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888074f11282 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x29c2(GFP_NOWAIT|__GFP_HIGHMEM|__GFP_IO|__GFP_FS|__GFP_ZERO), pid 5928, tgid 5928 (syz-executor), ts 80598654650, free_ts 80595057505 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1884 prep_new_page mm/page_alloc.c:1892 [inline] get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3945 __alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5240 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2486 alloc_frozen_pages_noprof mm/mempolicy.c:2557 [inline] alloc_pages_noprof+0x131/0x390 mm/mempolicy.c:2577 vm_area_alloc_pages mm/vmalloc.c:3649 [inline] __vmalloc_area_node mm/vmalloc.c:3863 [inline] __vmalloc_node_range_noprof+0xe6c/0x16b0 mm/vmalloc.c:4051 __vmalloc_node_noprof+0xad/0xf0 mm/vmalloc.c:4111 alloc_thread_stack_node kernel/fork.c:354 [inline] dup_task_struct kernel/fork.c:923 [inline] copy_process+0x619/0x7430 kernel/fork.c:2052 kernel_clone+0xfc/0x910 kernel/fork.c:2651 __do_sys_clone+0xce/0x120 kernel/fork.c:2792 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 5928 tgid 5928 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1433 [inline] __free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2973 discard_slab mm/slub.c:3346 [inline] __put_partials+0x130/0x170 mm/slub.c:3886 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4c/0xf0 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] __kmalloc_cache_node_noprof+0x299/0x830 mm/slub.c:5784 kmalloc_node_noprof include/linux/slab.h:983 [inline] __get_vm_area_node+0x101/0x330 mm/vmalloc.c:3208 __vmalloc_node_range_noprof+0x247/0x16b0 mm/vmalloc.c:4011 __vmalloc_node_noprof+0xad/0xf0 mm/vmalloc.c:4111 xt_counters_alloc+0x4c/0x70 net/netfilter/x_tables.c:1381 __do_replace+0x97/0x9e0 net/ipv4/netfilter/ip_tables.c:1046 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline] do_ipt_set_ctl+0x93b/0xc40 net/ipv4/netfilter/ip_tables.c:1635 nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0xcb/0xf0 net/ipv4/ip_sockglue.c:1424 tcp_setsockopt+0xa7/0x100 net/ipv4/tcp.c:4164 do_sock_setsockopt+0xf3/0x1d0 net/socket.c:2322 Memory state around the buggy address: ffffc90003427c80: f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90003427d00: 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 f1 f1 >ffffc90003427d80: 00 00 00 00 02 f3 f3 f3 f3 f3 00 00 00 00 00 00 ^ ffffc90003427e00: 00 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04 f2 00 00 ffffc90003427e80: f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- 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