From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f206.google.com (mail-oi1-f206.google.com [209.85.167.206]) (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 2F0C32E739C for ; Sat, 1 Aug 2026 00:12:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785543146; cv=none; b=Yux0hNYUJ8OwNhgzkcJ/G/uoBVsbjf7isgnXudsvrK4b+vvETn6WFbIGhjTno8cs79vZIizqKnvQ6sU4xak28YZeShG5hIW37eDyzypdzbgDJlQFZi+KVgSMKet/uOLLfR6pNOxR380IM8QMJWJD2YQviRsZ4QYXIYt09NWGXcE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785543146; c=relaxed/simple; bh=jflYwkOFkt5aLB01oJZODrQb6Go4JAo+tSPkvti9cB4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=qEqqRwjFtXr2kZIYUPX/20Zk1gUgD7yNmXVZnEr4/UHnqTjcRwPhCuIoybb9jOMkNu7+7jlWDSIN48zBQ3Ko38tEuGO/zBISKwayjtv6Bn376ukXc+EezdjAjwQ361RpTmUaPlHwEXYGycJnOnZbywAWpHXHME42CsdoBglSvGM= 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=209.85.167.206 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-oi1-f206.google.com with SMTP id 5614622812f47-4a41e3d6fe9so2004908b6e.2 for ; Fri, 31 Jul 2026 17:12:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785543143; x=1786147943; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=OMRu8fzs0LizgVP0fLVtF6iYQjw+F0uHveY/m4pWjsA=; b=ZzWeJQ4rDSnzO9QQEVZwa2DE+yELddpaZAHtyq5edQ0A6alZHjE5+CrySPXHst+BCI z8JK3u8g9/a2qxG6GZfqkswW31kOV7yANpzPDhIXdihkJVt/69ioNkmwHDea9t6AqxHj PQ2GJX1WnZd9Cl7AYQxR3wZpZQ0mGVF2J8QMpSGxnb+ZoxvOJMrnGilE26jJj/a8cgO5 OsC14tOJFtqYd623KDbUySd6+6ArgIXcaOWVJfouTeYqsFtEDkqa0jU8nojx03/JHyoi ZoMbdn0Eatr2/+NqAo4mho6dkxtM2sUmvw7Nu2B//9NxoncDO/p5fSQdqK3ZVmyvdwm5 zLGA== X-Gm-Message-State: AOJu0Yxqc/+YRKXhFugjU9+w3b3G+6yQ1tH4FIg7RM+VsHFLMM2uLVkP QwP9n+2N8kMNowCbJOPG+UawjziLQSCxWl8JpF8yRlm5P36uwnPOF0N+MY20CVvAOxCnXOFeb+5 /2DHOufrTEW4p0j6aDfgAqaZ2okJTEdZ52iFmPAdVGeSdrfqE9Rbcht6beGblYg== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1910:b0:495:fecb:bf9c with SMTP id 5614622812f47-4af5e0582c7mr4329703b6e.6.1785543143214; Fri, 31 Jul 2026 17:12:23 -0700 (PDT) Date: Fri, 31 Jul 2026 17:12:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6d39e7.f794c993.27aeb.0009.GAE@google.com> Subject: [syzbot] [kernel?] KASAN: slab-use-after-free Read in __release_resource From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 11028ab62899 Merge tag 'probes-fixes-v7.2-rc5' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13dbb5b9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=ee1062851b628d722093 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-11028ab6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e2be78614a29/vmlinux-11028ab6.xz kernel image: https://storage.googleapis.com/syzbot-assets/301a11d315af/bzImage-11028ab6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ee1062851b628d722093@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in __release_resource+0x276/0x2c0 kernel/resource.c:221 Read of size 8 at addr ffff888021f70c38 by task syz.9.908/9637 CPU: 3 UID: 0 PID: 9637 Comm: syz.9.908 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595 __release_resource+0x276/0x2c0 kernel/resource.c:221 release_resource+0x26/0x40 kernel/resource.c:319 pci_free_resources drivers/pci/remove.c:16 [inline] pci_destroy_dev drivers/pci/remove.c:56 [inline] pci_remove_bus_device+0x2d3/0x3b0 drivers/pci/remove.c:110 pci_stop_and_remove_bus_device_locked+0x1a/0x20 drivers/pci/remove.c:136 remove_store+0x123/0x140 drivers/pci/pci-sysfs.c:523 dev_attr_store+0x58/0x80 drivers/base/core.c:2505 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6ac/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fedd5f9df99 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fedd6f29028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fedd6226090 RCX: 00007fedd5f9df99 RDX: 0000000000000002 RSI: 0000200000000400 RDI: 0000000000000003 RBP: 00007fedd6034ec4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fedd6226128 R14: 00007fedd6226090 R15: 00007ffdf4647a78 Allocated by task 8169: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5334 [inline] __kmalloc_node_track_caller_noprof+0x331/0x830 mm/slub.c:5471 kmemdup_noprof+0x29/0x60 mm/util.c:138 platform_device_add_resources+0x37/0x100 drivers/base/platform.c:657 dwc2_pci_probe+0x1d3/0x360 drivers/usb/dwc2/pci.c:94 local_pci_probe+0xdd/0x1b0 drivers/pci/pci-driver.c:332 pci_call_probe+0x176/0x800 drivers/pci/pci-driver.c:394 __pci_device_probe drivers/pci/pci-driver.c:455 [inline] pci_device_probe+0x1cd/0x370 drivers/pci/pci-driver.c:489 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868 device_driver_attach+0xd1/0x220 drivers/base/dd.c:1203 bind_store+0xf4/0x190 drivers/base/bus.c:267 drv_attr_store+0x74/0xb0 drivers/base/bus.c:125 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6ac/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 9637: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2677 [inline] slab_free mm/slub.c:6377 [inline] kfree+0x22b/0x6c0 mm/slub.c:6692 platform_device_release+0x8a/0xb0 drivers/base/platform.c:605 device_release+0xd2/0x270 drivers/base/core.c:2636 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1f7/0x640 lib/kobject.c:737 put_device+0x1f/0x30 drivers/base/core.c:3880 platform_device_put drivers/base/platform.c:593 [inline] platform_device_unregister+0x45/0x50 drivers/base/platform.c:840 dwc2_pci_remove+0x55/0xd0 drivers/usb/dwc2/pci.c:46 pci_device_remove+0xb2/0x1d0 drivers/pci/pci-driver.c:512 device_remove+0xcb/0x180 drivers/base/dd.c:616 __device_release_driver drivers/base/dd.c:1349 [inline] device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372 pci_stop_dev drivers/pci/remove.c:27 [inline] pci_stop_bus_device+0x120/0x160 drivers/pci/remove.c:93 pci_stop_and_remove_bus_device+0x58/0xa0 drivers/pci/remove.c:128 pci_stop_and_remove_bus_device_locked+0x1a/0x20 drivers/pci/remove.c:136 remove_store+0x123/0x140 drivers/pci/pci-sysfs.c:523 dev_attr_store+0x58/0x80 drivers/base/core.c:2505 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6ac/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888021f70c00 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 56 bytes inside of freed 128-byte region [ffff888021f70c00, ffff888021f70c80) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888021f70100 pfn:0x21f70 flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000200 ffff88801bc42a00 ffffea00015f3910 ffffea00016c57d0 raw: ffff888021f70100 000000080010000e 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 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 36, tgid 36 (kworker/u33:0), ts 6263029117, free_ts 6262500452 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0xf48/0x3530 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x299/0x2dc0 mm/page_alloc.c:5304 alloc_slab_page mm/slub.c:3266 [inline] allocate_slab mm/slub.c:3380 [inline] new_slab+0xa2/0x640 mm/slub.c:3426 refill_objects+0xe3/0x410 mm/slub.c:7310 refill_sheaf mm/slub.c:2804 [inline] __pcs_replace_empty_main+0x376/0x680 mm/slub.c:4675 alloc_from_pcs mm/slub.c:4773 [inline] slab_alloc_node mm/slub.c:4905 [inline] __do_kmalloc_node mm/slub.c:5333 [inline] __kmalloc_noprof+0x66d/0x820 mm/slub.c:5359 _kmalloc_noprof include/linux/slab.h:992 [inline] _kzalloc_noprof include/linux/slab.h:1309 [inline] lsm_blob_alloc+0x68/0x90 security/security.c:218 lsm_task_alloc security/security.c:270 [inline] security_task_alloc+0x2a/0x260 security/security.c:2785 copy_process+0x2b94/0x8030 kernel/fork.c:2271 kernel_clone+0x176/0x9d0 kernel/fork.c:2748 user_mode_thread+0xcc/0x110 kernel/fork.c:2824 call_usermodehelper_exec_work kernel/umh.c:171 [inline] call_usermodehelper_exec_work+0xcb/0x180 kernel/umh.c:157 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 page last free pid 36 tgid 36 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] __free_frozen_pages+0x79f/0x1090 mm/page_alloc.c:2950 __kasan_populate_vmalloc_do mm/kasan/shadow.c:393 [inline] __kasan_populate_vmalloc+0x1ea/0x210 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0x95d/0x2bb0 mm/vmalloc.c:2123 __get_vm_area_node+0x1ca/0x330 mm/vmalloc.c:3226 __vmalloc_node_range_noprof+0x228/0x1630 mm/vmalloc.c:4042 __vmalloc_node_noprof+0xad/0xf0 mm/vmalloc.c:4143 alloc_thread_stack_node kernel/fork.c:359 [inline] dup_task_struct kernel/fork.c:929 [inline] copy_process+0x7fb/0x8030 kernel/fork.c:2115 kernel_clone+0x176/0x9d0 kernel/fork.c:2748 user_mode_thread+0xcc/0x110 kernel/fork.c:2824 call_usermodehelper_exec_work kernel/umh.c:171 [inline] call_usermodehelper_exec_work+0xcb/0x180 kernel/umh.c:157 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff888021f70b00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888021f70b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888021f70c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888021f70c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888021f70d00: 00 00 00 00 00 00 00 00 00 00 00 00 04 fc fc fc ================================================================== --- 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 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