From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) (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 894691A9F92 for ; Wed, 24 Sep 2025 05:35:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758692138; cv=none; b=J/XJzFc675O1QJIwbKCqkz18B/pOXISqmW927+8Z2vBjrIoD0PWOdsJGTwSFtcD17KVBVv69A8th32l2k9rWBksP7jO7V4vpWvpmMx7wFJ8PlVXz51PUZbcmtYJh3BFYo5g0V6ZX+BtvnHbbI8znllQHMSh0POqnjzvblN+BJDk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758692138; c=relaxed/simple; bh=eW2JdmipRzvrxsl5wBwsLl+RG6A0vPAVDtmAZKGbzOg=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=MFZ2f+Z7zKkqEwT9scY4k/B2QfHgmyo5T4/W0Sw22LczDWxQBxh0xgPhXrA2clQLTrgrES4TbgFpfA8JQ/Nmn9y881/MC5l0V5LKXbGcMjerY1y5RKXpPMzn768dsUP/xIyIxtAfpeVYuHPHJAr8bqov7PIi3NrrV88h5yr21Bo= 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=209.85.166.205 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-f205.google.com with SMTP id e9e14a558f8ab-42571803464so62624055ab.3 for ; Tue, 23 Sep 2025 22:35:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758692135; x=1759296935; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=QoIhc0Z3qOSxs+sQlNqcfGuNBxWQsU0VWj4ZQGBkHfI=; b=N3FEt/58gUfGN81xlVeXoFSQk9eazvGzQDNFqorMFVOGvGuCewYDsVFi4UjEXLJW9e 6Lp3eBZkk2Uln6XVUV5ER3tcL6ef91kN3lzf2pTejZwdmlZL15EyewE9DYPQt+iNftfI VYCSCGvyJ9hmexj7eXRyWRFmTOn8TPfo5Hncylt4HW/KaEyu+JwsFP3ORi3jj3cHQMcy AJ2ApiSrke2Qr32pfQ+StDg9hnOtuUC1QirBwU6bCIsR3JFf0vsCIO5XDLWh5asbjjln MkJd4Zfl8aKaIgZmkEhK8W+mianSGeBs5SDHu+elkmXSErbYdTMzOljnS3gJd7JRu7EZ gvYA== X-Forwarded-Encrypted: i=1; AJvYcCVZxmHZ0c3Dnf1TmYI24aj7SbVRCAkaY6WIGtx+m3qotsTjOTgaCpPDmsGpz2MURc/q1GcAhoABewtA6Bg=@vger.kernel.org X-Gm-Message-State: AOJu0YzdZiBn4BZBML54rk4orDFamhwKPaJmmeSsfM9T39sI46nxYBls UPKluw/axE74F3gryzEdqSjLjsny5UwEhMNKaHsAgqtMWMP0xFTsUbs7RwYwXtfcuVlYEUtfu1e YJgZm6E0pePMSr/j5hwqV6FFXQV183cvpYtfzHspV3AjmiCD7vjodzsimEQs= X-Google-Smtp-Source: AGHT+IG8fcusR7jD9lXqMUPmoLfFyEWxM5q+/rWet7UO8ZALsocl4wJene4nb/u0ktow/tT44gp7gcoQl28h9KfDXABEjLr7gMIG Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:4416:10b0:425:8c47:13f6 with SMTP id e9e14a558f8ab-4258c47179fmr20715195ab.29.1758692135649; Tue, 23 Sep 2025 22:35:35 -0700 (PDT) Date: Tue, 23 Sep 2025 22:35:35 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68d38327.a70a0220.1b52b.02be.GAE@google.com> Subject: [syzbot] [sound?] KASAN: slab-use-after-free Read in snd_usbmidi_error_timer (2) From: syzbot To: clemens@ladisch.de, linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org, perex@perex.cz, syzkaller-bugs@googlegroups.com, tiwai@suse.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: cec1e6e5d1ab Merge tag 'sched_ext-for-6.17-rc7-fixes' of g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=127fc142580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4d8792ecb6308d0f dashboard link: https://syzkaller.appspot.com/bug?extid=ce952c05d40571083fd6 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f000e10907d9/disk-cec1e6e5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e8da77cc2298/vmlinux-cec1e6e5.xz kernel image: https://storage.googleapis.com/syzbot-assets/9ad6164e7d28/bzImage-cec1e6e5.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ce952c05d40571083fd6@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline] BUG: KASAN: slab-use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] BUG: KASAN: slab-use-after-free in snd_usbmidi_error_timer+0x15d/0x660 sound/usb/midi.c:355 Read of size 4 at addr ffff8880310f9a10 by task syz.4.2001/13191 CPU: 0 UID: 0 PID: 13191 Comm: syz.4.2001 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 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 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:68 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] snd_usbmidi_error_timer+0x15d/0x660 sound/usb/midi.c:355 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__sanitizer_cov_trace_pc+0x46/0x70 kernel/kcov.c:222 Code: ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 1c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 RSP: 0018:ffffc90003007658 EFLAGS: 00000246 RAX: ffffffff8b72d1aa RBX: ffffc900030077c0 RCX: ffff88802acd3c00 RDX: ffffc9000d3ed000 RSI: 000000000007ffff RDI: ffffffff8be33f20 RBP: ffffc90003007790 R08: 0000000000000000 R09: ffffffff8b72d15c R10: dffffc0000000000 R11: fffffbfff1f47507 R12: dffffc0000000000 R13: 1ffff92000600ed4 R14: 0000000000000001 R15: ffffc900030076c0 rcu_read_lock include/linux/rcupdate.h:842 [inline] mt_find+0x1aa/0x5f0 lib/maple_tree.c:6931 find_vma+0xe7/0x160 mm/mmap.c:909 lock_mm_and_find_vma+0x5f/0x300 mm/mmap_lock.c:340 do_user_addr_fault+0x331/0x1390 arch/x86/mm/fault.c:1359 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:rep_movs_alternative+0x30/0x90 arch/x86/lib/copy_user_64.S:60 Code: 83 f9 08 73 25 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 e9 8d 0a 04 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 <48> 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 RSP: 0018:ffffc90003007a18 EFLAGS: 00050206 RAX: 00007ffffffff001 RBX: 0000000000000038 RCX: 0000000000000038 RDX: 0000000000000001 RSI: 0000200000297000 RDI: ffffc90003007aa0 RBP: ffffc90003007c30 R08: ffffc90003007ad7 R09: 1ffff92000600f5a R10: dffffc0000000000 R11: fffff52000600f5b R12: 0000000000000002 R13: dffffc0000000000 R14: ffffc90003007aa0 R15: 0000200000297000 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline] _inline_copy_from_user include/linux/uaccess.h:178 [inline] _copy_from_user+0x7a/0xb0 lib/usercopy.c:18 copy_from_user include/linux/uaccess.h:212 [inline] copy_msghdr_from_user net/socket.c:2544 [inline] recvmsg_copy_msghdr net/socket.c:2800 [inline] ___sys_recvmsg+0x12e/0x510 net/socket.c:2872 do_recvmmsg+0x307/0x770 net/socket.c:2971 __sys_recvmmsg net/socket.c:3045 [inline] __do_sys_recvmmsg net/socket.c:3068 [inline] __se_sys_recvmmsg net/socket.c:3061 [inline] __x64_sys_recvmmsg+0x190/0x240 net/socket.c:3061 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: 0033:0x7f873778eec9 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:00007f87359f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f87379e6090 RCX: 00007f873778eec9 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007f8737811f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f87379e6128 R14: 00007f87379e6090 R15: 00007f8737b0fa28 Allocated by task 5950: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:388 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:405 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4376 [inline] __kmalloc_noprof+0x27a/0x4f0 mm/slub.c:4388 kmalloc_noprof include/linux/slab.h:909 [inline] usb_alloc_urb+0x46/0x150 drivers/usb/core/urb.c:75 snd_usbmidi_in_endpoint_create+0xb4/0xa30 sound/usb/midi.c:1348 snd_usbmidi_create_endpoints_midiman sound/usb/midi.c:2363 [inline] __snd_usbmidi_create+0x2223/0x2a70 sound/usb/midi.c:2646 snd_usb_midi_v2_create+0x43e6/0x4660 sound/usb/midi2.c:1178 usb_audio_probe+0xb78/0x1e10 sound/usb/card.c:976 usb_probe_interface+0x668/0xc30 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+0x1c4/0x390 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:3236 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Freed by task 5950: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:243 [inline] __kasan_slab_free+0x5b/0x80 mm/kasan/common.c:275 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2422 [inline] slab_free mm/slub.c:4695 [inline] kfree+0x18e/0x440 mm/slub.c:4894 free_urb_and_buffer sound/usb/midi.c:1309 [inline] snd_usbmidi_in_endpoint_delete+0xde/0x680 sound/usb/midi.c:1322 snd_usbmidi_free sound/usb/midi.c:1530 [inline] snd_usbmidi_rawmidi_free+0xae/0x160 sound/usb/midi.c:1591 snd_rawmidi_free+0x3bc/0x410 sound/core/rawmidi.c:1934 snd_rawmidi_dev_free+0x38/0x50 sound/core/rawmidi.c:1945 __snd_device_free+0x1d2/0x2e0 sound/core/device.c:76 snd_device_free_all+0xcf/0x180 sound/core/device.c:233 snd_card_do_free sound/core/init.c:587 [inline] release_card_device+0x75/0x1b0 sound/core/init.c:153 device_release+0x9c/0x1c0 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x22b/0x480 lib/kobject.c:737 snd_card_free_when_closed sound/core/init.c:618 [inline] snd_card_free+0x110/0x190 sound/core/init.c:650 usb_audio_probe+0x193f/0x1e10 sound/usb/card.c:1034 usb_probe_interface+0x668/0xc30 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+0x1c4/0x390 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:3236 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff8880310f9a00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 16 bytes inside of freed 192-byte region [ffff8880310f9a00, ffff8880310f9ac0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x310f9 anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801a4413c0 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 19362280210, free_ts 19332206122 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851 prep_new_page mm/page_alloc.c:1859 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:2492 [inline] allocate_slab+0x8a/0x370 mm/slub.c:2660 new_slab mm/slub.c:2714 [inline] ___slab_alloc+0xbeb/0x1420 mm/slub.c:3901 __slab_alloc mm/slub.c:3992 [inline] __slab_alloc_node mm/slub.c:4067 [inline] slab_alloc_node mm/slub.c:4228 [inline] __kmalloc_cache_noprof+0x296/0x3d0 mm/slub.c:4402 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] call_usermodehelper_setup+0x8e/0x270 kernel/umh.c:362 kobject_uevent_env+0x65c/0x8c0 lib/kobject_uevent.c:628 kernel_add_sysfs_param+0xb1/0xe0 kernel/params.c:816 param_sysfs_builtin+0x18a/0x230 kernel/params.c:851 param_sysfs_builtin_init+0x23/0x30 kernel/params.c:987 do_one_initcall+0x233/0x820 init/main.c:1269 do_initcall_level+0x104/0x190 init/main.c:1331 do_initcalls+0x59/0xa0 init/main.c:1347 kernel_init_freeable+0x334/0x4b0 init/main.c:1579 page last free pid 980 tgid 980 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2895 vfree+0x25a/0x400 mm/vmalloc.c:3434 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3353 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x439/0x7d0 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: ffff8880310f9900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880310f9980: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880310f9a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880310f9a80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880310f9b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== ---------------- Code disassembly (best guess): 0: ff 00 incl (%rax) 2: 74 11 je 0x15 4: 81 fa 00 01 00 00 cmp $0x100,%edx a: 75 35 jne 0x41 c: 83 b9 3c 16 00 00 00 cmpl $0x0,0x163c(%rcx) 13: 74 2c je 0x41 15: 8b 91 18 16 00 00 mov 0x1618(%rcx),%edx 1b: 83 fa 02 cmp $0x2,%edx 1e: 75 21 jne 0x41 20: 48 8b 91 20 16 00 00 mov 0x1620(%rcx),%rdx 27: 48 8b 32 mov (%rdx),%rsi * 2a: 48 8d 7e 01 lea 0x1(%rsi),%rdi <-- trapping instruction 2e: 8b 89 1c 16 00 00 mov 0x161c(%rcx),%ecx 34: 48 39 cf cmp %rcx,%rdi 37: 73 08 jae 0x41 39: 48 89 3a mov %rdi,(%rdx) 3c: 48 rex.W 3d: 89 .byte 0x89 3e: 44 rex.R 3f: f2 repnz --- This report is generated by a bot. 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