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 D10C963CF for ; Mon, 13 Oct 2025 04:00:32 +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=1760328035; cv=none; b=MSlDK0pNXtt+nUicgM1T/w4vrVYTyNSK7ThMI3JFdhKO37E0IaGY+XkLEHe+7RgPRSUhv2H+3jnQnUK2md827dUK4zRTDtVW2GCW5FVu/AThhWeytcIUn2MaAGmcO13osJv7rJTevqHmhKWkhRP0TSw8ofNq8dpfGsQetizML2Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760328035; c=relaxed/simple; bh=I33CF8fqmkWX6xdzUXMEoJt4pXkatza5YC6mr25BUJU=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=FGSXsvK11g7X7+dEM8iHn2F5ZfFTW08/lMyB3RYiSgvqprNH3J/RIzW7lKgWPcWq/2xclXPIqoCyra1wIKMzB7LKZMZRASkWHxUrp51ePRS09k7HAT7nTEgcCSIS57KxwAha2nQX8hp3FY/KpHnNUaHT9M7xnrzLs8ao0cWCn68= 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-42a076e4f9eso131190305ab.1 for ; Sun, 12 Oct 2025 21:00:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760328032; x=1760932832; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=XWYpsc/RBD21Lpv+U0MqAqFJnrtwZGajEDtLo12xJpY=; b=OUS9AvkP7E9BETkJ/4znJtCxFxR4WBYPxgfl39rbt31FppxebpG4zjeDq7PB8D5o8z AFu7XtABOxNoaRwLvfbo4eF0XGTpEOtBmqFjlOPg5Pw1vYy8Vw9gTuoMx9GcdpI0sIX8 HVUHMX64N+U6fWtIQntbRzQYprm/K4LOssWKrCGIhjXxbDfIWMlcgBGpr+qjpKz5O/Ix XiJ99X6RXEZ82CRuc+2Ehoi16bzk0ltHP7ZQjvsrLFSnd9KL8JTkkvb6NNhIT/0Qxzqb 09UYUYYcYGeUvCh0Wx9NEhju/+v4HI3puLYcKlRhmv3N3wNr72gZSt1suAhqVOpnF2Y7 2Qlw== X-Forwarded-Encrypted: i=1; AJvYcCWxqjJpZhz0YfDGeIHFE2Nj/oIzOWQdPAbA5NdF0PU/MmmyMvQdLADIStCPNObx8JdXQLl1pp7+SkOoLJ0=@vger.kernel.org X-Gm-Message-State: AOJu0YwgXN4xihWH86AO2oovxQU1cqP+LHO9MDJRN5dOFWVC3aleGJyb FN8sCstzRIb97SEJyFdvwThE2Mv6kpsEJchgNAFSkL/XkMGDI4IFaTSRHsBVXsmbg+h5J2jkw1W 7GW2fyRZlw8rgGtFgL4fTy7avRdohAstOvjJgYzkI1TM2da20EK28DVTEYyM= X-Google-Smtp-Source: AGHT+IHGgFMEUmfsMZylgIXCnY/O+4NW9gjIe+pXFc7I2oTAB1w8bsV8W1TkKcL9gHK8ZlxseUAbvIIhKzyq0ytWddFCorJzYFG0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:12eb:b0:42f:8e77:6241 with SMTP id e9e14a558f8ab-42f8e7762c1mr159780255ab.20.1760328032049; Sun, 12 Oct 2025 21:00:32 -0700 (PDT) Date: Sun, 12 Oct 2025 21:00:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68ec7960.a70a0220.b3ac9.0017.GAE@google.com> Subject: [syzbot] [input?] [usb?] KASAN: slab-out-of-bounds Read in mcp2221_raw_event (2) From: syzbot To: bentiss@kernel.org, jikos@kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: ec714e371f22 Merge tag 'perf-tools-for-v6.18-1-2025-10-08'.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15400dcd980000 kernel config: https://syzkaller.appspot.com/x/.config?x=61ab7fa743df0ec1 dashboard link: https://syzkaller.appspot.com/bug?extid=1018672fe70298606e5f compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/4067604ee40d/disk-ec714e37.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6683059d243f/vmlinux-ec714e37.xz kernel image: https://storage.googleapis.com/syzbot-assets/fcbc710a7633/bzImage-ec714e37.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1018672fe70298606e5f@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in mcp2221_raw_event+0x106a/0x1240 drivers/hid/hid-mcp2221.c:948 Read of size 1 at addr ffff88806c49ffff by task kworker/1:4/5894 CPU: 1 UID: 0 PID: 5894 Comm: kworker/1:4 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Workqueue: usb_hub_wq hub_event Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 mcp2221_raw_event+0x106a/0x1240 drivers/hid/hid-mcp2221.c:948 __hid_input_report drivers/hid/hid-core.c:2139 [inline] hid_input_report+0x40a/0x520 drivers/hid/hid-core.c:2166 hid_irq_in+0x47e/0x6d0 drivers/hid/usbhid/hid-core.c:286 __usb_hcd_giveback_urb+0x373/0x540 drivers/usb/core/hcd.c:1661 dummy_timer+0x85f/0x44c0 drivers/usb/gadget/udc/dummy_hcd.c:1995 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1841 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1858 handle_softirqs+0x283/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:80 [inline] RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline] RIP: 0010:unwind_next_frame+0x130e/0x2390 arch/x86/kernel/unwind_orc.c:494 Code: c1 e8 3f 48 01 c8 48 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 27 49 63 07 4c 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 RSP: 0018:ffffc9000450d6d8 EFLAGS: 00000a07 RAX: 0000000000000000 RBX: ffffffff8fe36e54 RCX: dffffc0000000000 RDX: ffffffff8fe36e54 RSI: ffffffff90773ada RDI: ffffffff8bc07480 RBP: ffffffff8fe36e54 R08: 0000000000000001 R09: ffffffff81731d25 R10: ffffc9000450d7f8 R11: ffffffff81abbce0 R12: ffffffff85ccc8e0 R13: ffffffff8fe36e54 R14: ffffc9000450d7a8 R15: ffffffff8fe36e54 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 poison_kmalloc_redzone mm/kasan/common.c:400 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:417 kasan_kmalloc include/linux/kasan.h:262 [inline] __kmalloc_cache_noprof+0x3d5/0x6f0 mm/slub.c:5724 kmalloc_noprof include/linux/slab.h:957 [inline] add_stack_record_to_list mm/page_owner.c:172 [inline] inc_stack_record_count mm/page_owner.c:214 [inline] __set_page_owner+0x25c/0x4a0 mm/page_owner.c:333 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:3030 [inline] allocate_slab+0x96/0x3a0 mm/slub.c:3203 new_slab mm/slub.c:3257 [inline] ___slab_alloc+0xe94/0x1920 mm/slub.c:4627 __slab_alloc+0x65/0x100 mm/slub.c:4746 __slab_alloc_node mm/slub.c:4822 [inline] slab_alloc_node mm/slub.c:5233 [inline] kmem_cache_alloc_noprof+0x3f9/0x6e0 mm/slub.c:5252 __kernfs_new_node+0xd7/0x7e0 fs/kernfs/dir.c:637 kernfs_new_node+0x102/0x210 fs/kernfs/dir.c:713 __kernfs_create_file+0x4b/0x2e0 fs/kernfs/file.c:1057 sysfs_add_file_mode_ns+0x238/0x300 fs/sysfs/file.c:313 sysfs_create_file_ns+0x128/0x1a0 fs/sysfs/file.c:374 device_add+0x5d2/0xb50 drivers/base/core.c:3655 cdev_device_add+0x1d6/0x390 fs/char_dev.c:556 i2cdev_attach_adapter+0x2ed/0x4e0 drivers/i2c/i2c-dev.c:691 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85 blocking_notifier_call_chain+0x6a/0x90 kernel/notifier.c:380 bus_notify+0x143/0x180 drivers/base/bus.c:1001 device_add+0x54d/0xb50 drivers/base/core.c:3669 i2c_register_adapter+0x4f1/0x10f0 drivers/i2c/i2c-core-base.c:1573 devm_i2c_add_adapter+0x1b/0x80 drivers/i2c/i2c-core-base.c:1845 mcp2221_probe+0x404/0x880 drivers/hid/hid-mcp2221.c:1289 __hid_device_probe drivers/hid/hid-core.c:2775 [inline] hid_device_probe+0x416/0x7a0 drivers/hid/hid-core.c:2812 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26a/0x9e0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031 bus_probe_device+0x185/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3689 hid_add_device+0x272/0x3e0 drivers/hid/hid-core.c:2951 usbhid_probe+0xe13/0x12a0 drivers/hid/usbhid/hid-core.c:1435 usb_probe_interface+0x665/0xc30 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26a/0x9e0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031 bus_probe_device+0x185/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3689 usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c1/0x390 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26a/0x9e0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031 bus_probe_device+0x185/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3689 usb_new_device+0xa39/0x16f0 drivers/usb/core/hub.c:2694 hub_port_connect drivers/usb/core/hub.c:5566 [inline] hub_port_connect_change drivers/usb/core/hub.c:5706 [inline] port_event drivers/usb/core/hub.c:5870 [inline] hub_event+0x2958/0x4a20 drivers/usb/core/hub.c:5952 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 6100: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4946 [inline] slab_alloc_node mm/slub.c:5245 [inline] kmem_cache_alloc_node_noprof+0x433/0x710 mm/slub.c:5297 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:579 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:670 alloc_skb include/linux/skbuff.h:1383 [inline] alloc_uevent_skb+0x7d/0x230 lib/kobject_uevent.c:289 uevent_net_broadcast_tagged lib/kobject_uevent.c:352 [inline] kobject_uevent_net_broadcast+0x184/0x560 lib/kobject_uevent.c:413 kobject_uevent_env+0x55b/0x8c0 lib/kobject_uevent.c:608 __kobject_del+0xd2/0x300 lib/kobject.c:601 kobject_cleanup lib/kobject.c:680 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x243/0x480 lib/kobject.c:737 netdev_queue_update_kobjects+0x5db/0x6c0 net/core/net-sysfs.c:2073 remove_queue_kobjects net/core/net-sysfs.c:2170 [inline] netdev_unregister_kobject+0x11f/0x450 net/core/net-sysfs.c:2325 unregister_netdevice_many_notify+0x1a6b/0x1ff0 net/core/dev.c:12289 unregister_netdevice_many net/core/dev.c:12317 [inline] unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12161 unregister_netdevice include/linux/netdevice.h:3389 [inline] __tun_detach+0x6d9/0x15d0 drivers/net/tun.c:621 tun_detach drivers/net/tun.c:637 [inline] tun_chr_close+0x10a/0x1c0 drivers/net/tun.c:3436 __fput+0x44c/0xa70 fs/file_table.c:468 task_work_run+0x1d4/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xe9/0x130 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] __do_fast_syscall_32+0x1f4/0x2b0 arch/x86/entry/syscall_32.c:309 do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Freed by task 6100: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2514 [inline] slab_free mm/slub.c:6566 [inline] kmem_cache_free+0x19b/0x690 mm/slub.c:6676 skb_release_data+0x62d/0x7c0 net/core/skbuff.c:1087 skb_release_all net/core/skbuff.c:1152 [inline] __kfree_skb net/core/skbuff.c:1166 [inline] consume_skb+0x9e/0xf0 net/core/skbuff.c:1398 netlink_broadcast_filtered+0xec7/0x1000 net/netlink/af_netlink.c:1537 netlink_broadcast+0x37/0x50 net/netlink/af_netlink.c:1559 uevent_net_broadcast_tagged lib/kobject_uevent.c:373 [inline] kobject_uevent_net_broadcast+0x4bc/0x560 lib/kobject_uevent.c:413 kobject_uevent_env+0x55b/0x8c0 lib/kobject_uevent.c:608 __kobject_del+0xd2/0x300 lib/kobject.c:601 kobject_cleanup lib/kobject.c:680 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x243/0x480 lib/kobject.c:737 netdev_queue_update_kobjects+0x5db/0x6c0 net/core/net-sysfs.c:2073 remove_queue_kobjects net/core/net-sysfs.c:2170 [inline] netdev_unregister_kobject+0x11f/0x450 net/core/net-sysfs.c:2325 unregister_netdevice_many_notify+0x1a6b/0x1ff0 net/core/dev.c:12289 unregister_netdevice_many net/core/dev.c:12317 [inline] unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12161 unregister_netdevice include/linux/netdevice.h:3389 [inline] __tun_detach+0x6d9/0x15d0 drivers/net/tun.c:621 tun_detach drivers/net/tun.c:637 [inline] tun_chr_close+0x10a/0x1c0 drivers/net/tun.c:3436 __fput+0x44c/0xa70 fs/file_table.c:468 task_work_run+0x1d4/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xe9/0x130 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] __do_fast_syscall_32+0x1f4/0x2b0 arch/x86/entry/syscall_32.c:309 do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331 entry_SYSENTER_compat_after_hwframe+0x84/0x8e The buggy address belongs to the object at ffff88806c49fa80 which belongs to the cache skbuff_small_head of size 704 The buggy address is located 703 bytes to the right of allocated 704-byte region [ffff88806c49fa80, ffff88806c49fd40) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6c49c head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 ksm flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff8881416f6b40 ffffea0001b12500 0000000000000003 raw: 0000000000000000 0000000000130013 00000000f5000000 0000000000000000 head: 00fff00000000040 ffff8881416f6b40 ffffea0001b12500 0000000000000003 head: 0000000000000000 0000000000130013 00000000f5000000 0000000000000000 head: 00fff00000000002 ffffea0001b12701 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 12, tgid 12 (kworker/u8:0), ts 104150033521, free_ts 94308046189 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:3030 [inline] allocate_slab+0x96/0x3a0 mm/slub.c:3203 new_slab mm/slub.c:3257 [inline] ___slab_alloc+0xe94/0x1920 mm/slub.c:4627 __slab_alloc+0x65/0x100 mm/slub.c:4746 __slab_alloc_node mm/slub.c:4822 [inline] slab_alloc_node mm/slub.c:5233 [inline] kmem_cache_alloc_node_noprof+0x4c5/0x710 mm/slub.c:5297 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:579 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:670 alloc_skb include/linux/skbuff.h:1383 [inline] nlmsg_new include/net/netlink.h:1055 [inline] inet6_rt_notify+0x170/0x470 net/ipv6/route.c:6345 fib6_add_rt2node+0x1876/0x33a0 net/ipv6/ip6_fib.c:1275 fib6_add+0x8da/0x18a0 net/ipv6/ip6_fib.c:1528 __ip6_ins_rt net/ipv6/route.c:1351 [inline] ip6_ins_rt+0xc8/0x120 net/ipv6/route.c:1361 __ipv6_ifa_notify+0x63f/0xac0 net/ipv6/addrconf.c:6283 ipv6_ifa_notify net/ipv6/addrconf.c:6322 [inline] addrconf_dad_completed+0x180/0xd60 net/ipv6/addrconf.c:4320 page last free pid 5818 tgid 5818 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] free_unref_folios+0xdb3/0x14f0 mm/page_alloc.c:2963 folios_put_refs+0x584/0x670 mm/swap.c:1002 free_pages_and_swap_cache+0x277/0x520 mm/swap_state.c:355 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline] tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:397 [inline] tlb_flush_mmu+0x3a0/0x680 mm/mmu_gather.c:404 tlb_finish_mmu+0xc3/0x1d0 mm/mmu_gather.c:497 vms_clear_ptes+0x42c/0x540 mm/vma.c:1235 vms_complete_munmap_vmas+0x206/0x8a0 mm/vma.c:1277 do_vmi_align_munmap+0x364/0x440 mm/vma.c:1536 do_vmi_munmap+0x253/0x2e0 mm/vma.c:1584 __vm_munmap+0x207/0x380 mm/vma.c:3156 __do_sys_munmap mm/mmap.c:1080 [inline] __se_sys_munmap mm/mmap.c:1077 [inline] __ia32_sys_munmap+0x5f/0x70 mm/mmap.c:1077 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb6/0x2b0 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Memory state around the buggy address: ffff88806c49fe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88806c49ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88806c49ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88806c4a0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88806c4a0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== ---------------- Code disassembly (best guess): 0: c1 e8 3f shr $0x3f,%eax 3: 48 01 c8 add %rcx,%rax 6: 48 83 e0 fe and $0xfffffffffffffffe,%rax a: 4c 8d 3c 45 00 00 00 lea 0x0(,%rax,2),%r15 11: 00 12: 49 01 ef add %rbp,%r15 15: 4c 89 f8 mov %r15,%rax 18: 48 c1 e8 03 shr $0x3,%rax 1c: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 23: fc ff df 26: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax * 2a: 84 c0 test %al,%al <-- trapping instruction 2c: 75 27 jne 0x55 2e: 49 63 07 movslq (%r15),%rax 31: 4c 01 f8 add %r15,%rax 34: 49 8d 4f 04 lea 0x4(%r15),%rcx 38: 4c 39 e0 cmp %r12,%rax 3b: 48 0f 46 e9 cmovbe %rcx,%rbp 3f: 49 rex.WB --- This report is generated by a bot. 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