* Re: [syzbot] [usb?] KASAN: slab-use-after-free Read in vhci_cleanup_unlink_list [not found] <6a6d3cbd.6ce73036.24301b.000c.GAE@google.com> @ 2026-08-06 6:07 ` syzbot 2026-09-08 9:20 ` Aleksandr Nogikh 0 siblings, 1 reply; 2+ messages in thread From: syzbot @ 2026-08-06 6:07 UTC (permalink / raw) To: gregkh, i, linux-kernel, linux-usb, nobuo.iwata, nogikh, shuah, syzbot, syzbot, syzkaller-bugs, syzkaller-upstream-moderation, valentina.manea.m syzbot has found a reproducer for the following issue on: HEAD commit: 0d8395707651 Merge tag 'soc-fixes-7.2-2' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1455929e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=f4518ac0a3dd3aafde38 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12e5bbb9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16ffb7b9580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-0d839570.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0b7275b6c889/vmlinux-0d839570.xz kernel image: https://storage.googleapis.com/syzbot-assets/b752a676c1dd/bzImage-0d839570.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f4518ac0a3dd3aafde38@syzkaller.appspotmail.com vhci_hcd vhci_hcd.0: release socket ================================================================== BUG: KASAN: slab-use-after-free in vdev_to_vhci_hcd drivers/usb/usbip/vhci.h:171 [inline] BUG: KASAN: slab-use-after-free in vhci_cleanup_unlink_list+0x44/0x456 drivers/usb/usbip/vhci_hcd.c:985 Read of size 4 at addr ffff88802bf5d230 by task kworker/u32:3/5807 CPU: 1 UID: 0 PID: 5807 Comm: kworker/u32:3 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 Workqueue: usbip_event event_handler Call Trace: <TASK> __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 vdev_to_vhci_hcd drivers/usb/usbip/vhci.h:171 [inline] vhci_cleanup_unlink_list+0x44/0x456 drivers/usb/usbip/vhci_hcd.c:985 vhci_device_unlink_cleanup drivers/usb/usbip/vhci_hcd.c:1028 [inline] vhci_shutdown_connection.cold+0x165/0x37c drivers/usb/usbip/vhci_hcd.c:1069 event_handler+0x216/0x570 drivers/usb/usbip/usbip_event.c:79 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 </TASK> Allocated by task 1: 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_noprof+0x322/0x820 mm/slub.c:5359 _kmalloc_noprof include/linux/slab.h:992 [inline] _kzalloc_noprof include/linux/slab.h:1309 [inline] __usb_create_hcd+0x5e/0xac0 drivers/usb/core/hcd.c:2566 vhci_hcd_probe+0x1a5/0x4e0 drivers/usb/usbip/vhci_hcd.c:1394 platform_probe+0x106/0x1d0 drivers/base/platform.c:1439 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 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153 bus_probe_device+0x64/0x160 drivers/base/bus.c:620 device_add+0x121d/0x1970 drivers/base/core.c:3772 platform_device_add+0x35a/0x800 drivers/base/platform.c:762 platform_device_register_full+0x5cf/0x830 drivers/base/platform.c:902 vhci_hcd_init+0x1a1/0x2f0 drivers/usb/usbip/vhci_hcd.c:1557 do_one_initcall+0x11d/0x700 init/main.c:1347 do_initcall_level init/main.c:1409 [inline] do_initcalls init/main.c:1425 [inline] do_basic_setup init/main.c:1445 [inline] kernel_init_freeable+0x6ea/0x7b0 init/main.c:1658 kernel_init+0x1f/0x1e0 init/main.c:1548 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Freed by task 5926: 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 hcd_release drivers/usb/core/hcd.c:2690 [inline] kref_put include/linux/kref.h:65 [inline] usb_put_hcd drivers/usb/core/hcd.c:2704 [inline] usb_put_hcd+0x149/0x1f0 drivers/usb/core/hcd.c:2701 vhci_hcd_remove+0xb5/0x1b0 drivers/usb/usbip/vhci_hcd.c:1431 platform_remove+0x5f/0x80 drivers/base/platform.c:1456 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 unbind_store+0xf8/0x110 drivers/base/bus.c:244 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 Last potentially related work creation: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:556 insert_work+0x36/0x230 kernel/workqueue.c:2226 __queue_work+0x9bc/0x12b0 kernel/workqueue.c:2401 queue_work_on+0x1a9/0x1e0 kernel/workqueue.c:2452 queue_work include/linux/workqueue.h:699 [inline] usb_hcd_giveback_urb+0x330/0x4a0 drivers/usb/core/hcd.c:1758 usb_rh_urb_dequeue drivers/usb/core/hcd.c:845 [inline] unlink1+0x418/0x510 drivers/usb/core/hcd.c:1580 usb_hcd_unlink_urb+0x131/0x210 drivers/usb/core/hcd.c:1617 usb_kill_urb drivers/usb/core/urb.c:716 [inline] usb_kill_urb+0x121/0x320 drivers/usb/core/urb.c:703 hub_quiesce+0x1e9/0x320 drivers/usb/core/hub.c:1412 hub_suspend+0x4ab/0x9e0 drivers/usb/core/hub.c:4008 usb_suspend_interface drivers/usb/core/driver.c:1323 [inline] usb_suspend_both+0x288/0x950 drivers/usb/core/driver.c:1446 usb_runtime_suspend+0x49/0x120 drivers/usb/core/driver.c:2000 __rpm_callback+0xc8/0x620 drivers/base/power/runtime.c:406 rpm_callback+0x16a/0x1b0 drivers/base/power/runtime.c:460 rpm_suspend+0x2f4/0x11a0 drivers/base/power/runtime.c:698 __pm_runtime_suspend+0xba/0x1a0 drivers/base/power/runtime.c:1167 pm_runtime_autosuspend include/linux/pm_runtime.h:415 [inline] usb_runtime_idle+0x7e/0x90 drivers/usb/core/driver.c:2037 rpm_idle+0x322/0x790 drivers/base/power/runtime.c:550 pm_runtime_work+0x120/0x150 drivers/base/power/runtime.c:995 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 Second to last potentially related work creation: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:556 insert_work+0x36/0x230 kernel/workqueue.c:2226 __queue_work+0x9bc/0x12b0 kernel/workqueue.c:2401 queue_work_on+0x1a9/0x1e0 kernel/workqueue.c:2452 queue_work include/linux/workqueue.h:699 [inline] usb_hcd_giveback_urb+0x3b8/0x4a0 drivers/usb/core/hcd.c:1760 rh_call_control drivers/usb/core/hcd.c:706 [inline] rh_urb_enqueue drivers/usb/core/hcd.c:817 [inline] usb_hcd_submit_urb+0xab7/0x2150 drivers/usb/core/hcd.c:1538 usb_submit_urb+0x827/0x19b0 drivers/usb/core/urb.c:586 usb_start_wait_urb+0x10e/0x580 drivers/usb/core/message.c:62 usb_internal_control_msg drivers/usb/core/message.c:117 [inline] usb_control_msg+0x328/0x4b0 drivers/usb/core/message.c:167 set_port_feature drivers/usb/core/hub.c:466 [inline] hub_suspend+0x826/0x9e0 drivers/usb/core/hub.c:3996 usb_suspend_interface drivers/usb/core/driver.c:1323 [inline] usb_suspend_both+0x288/0x950 drivers/usb/core/driver.c:1446 usb_runtime_suspend+0x49/0x120 drivers/usb/core/driver.c:2000 __rpm_callback+0xc8/0x620 drivers/base/power/runtime.c:406 rpm_callback+0x16a/0x1b0 drivers/base/power/runtime.c:460 rpm_suspend+0x2f4/0x11a0 drivers/base/power/runtime.c:698 __pm_runtime_suspend+0xba/0x1a0 drivers/base/power/runtime.c:1167 pm_runtime_autosuspend include/linux/pm_runtime.h:415 [inline] usb_runtime_idle+0x7e/0x90 drivers/usb/core/driver.c:2037 rpm_idle+0x322/0x790 drivers/base/power/runtime.c:550 pm_runtime_work+0x120/0x150 drivers/base/power/runtime.c:995 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 The buggy address belongs to the object at ffff88802bf5c000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 4656 bytes inside of freed 8192-byte region [ffff88802bf5c000, ffff88802bf5e000) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2bf58 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801bc43180 dead000000000122 0000000000000000 raw: 0000000000000000 0000000800020002 00000000f5000000 0000000000000000 head: 00fff00000000040 ffff88801bc43180 dead000000000122 0000000000000000 head: 0000000000000000 0000000800020002 00000000f5000000 0000000000000000 head: 00fff00000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 7941256619, free_ts 7717626992 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] acpi_ut_initialize_buffer+0x144/0x220 drivers/acpi/acpica/utalloc.c:327 acpi_rs_create_pci_routing_table+0x135/0xe00 drivers/acpi/acpica/rscreate.c:212 acpi_rs_get_prt_method_data+0xc1/0x150 drivers/acpi/acpica/rsutils.c:456 acpi_get_irq_routing_table+0xb8/0x140 drivers/acpi/acpica/rsxface.c:137 acpi_pci_irq_find_prt_entry+0x179/0xdd0 drivers/acpi/pci_irq.c:215 acpi_pci_irq_lookup+0x8e/0x6b0 drivers/acpi/pci_irq.c:299 acpi_pci_irq_enable+0x1f5/0x6f0 drivers/acpi/pci_irq.c:414 pcibios_enable_device+0xb6/0xe0 arch/x86/pci/common.c:699 do_pci_enable_device+0x21f/0x4a0 drivers/pci/pci.c:1998 page last free pid 1351 tgid 1351 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] free_pages_prepare+0x586/0xd80 mm/page_alloc.c:1451 __free_contig_range_common+0x14f/0x250 mm/page_alloc.c:6897 __free_contig_range mm/page_alloc.c:6942 [inline] free_pages_bulk+0x12a/0x200 mm/page_alloc.c:5257 vm_area_free_pages+0xad/0x2b0 mm/vmalloc.c:3439 vfree mm/vmalloc.c:3488 [inline] vfree+0x107/0x750 mm/vmalloc.c:3462 delayed_vfree_work+0x56/0x80 mm/vmalloc.c:3392 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: ffff88802bf5d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802bf5d180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802bf5d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802bf5d280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802bf5d300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- 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. ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [syzbot] [usb?] KASAN: slab-use-after-free Read in vhci_cleanup_unlink_list 2026-08-06 6:07 ` [syzbot] [usb?] KASAN: slab-use-after-free Read in vhci_cleanup_unlink_list syzbot @ 2026-09-08 9:20 ` Aleksandr Nogikh 0 siblings, 0 replies; 2+ messages in thread From: Aleksandr Nogikh @ 2026-09-08 9:20 UTC (permalink / raw) To: syzbot Cc: linux-kernel, linux-usb, syzbot, syzkaller-bugs, syzkaller-upstream-moderation #syz invalid See the discussion at https://lore.kernel.org/all/6a88012e.dbb3a75c.13dd47.0007.GAE@google.com/T/ On Thu, Aug 6, 2026 at 8:07 AM syzbot <syzbot+f4518ac0a3dd3aafde38@syzkaller.appspotmail.com> wrote: > > syzbot has found a reproducer for the following issue on: > > HEAD commit: 0d8395707651 Merge tag 'soc-fixes-7.2-2' of git://git.kern.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=1455929e580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 > dashboard link: https://syzkaller.appspot.com/bug?extid=f4518ac0a3dd3aafde38 > compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12e5bbb9580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16ffb7b9580000 > > Downloadable assets: > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-0d839570.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/0b7275b6c889/vmlinux-0d839570.xz > kernel image: https://storage.googleapis.com/syzbot-assets/b752a676c1dd/bzImage-0d839570.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+f4518ac0a3dd3aafde38@syzkaller.appspotmail.com > > vhci_hcd vhci_hcd.0: release socket > ================================================================== > BUG: KASAN: slab-use-after-free in vdev_to_vhci_hcd drivers/usb/usbip/vhci.h:171 [inline] > BUG: KASAN: slab-use-after-free in vhci_cleanup_unlink_list+0x44/0x456 drivers/usb/usbip/vhci_hcd.c:985 > Read of size 4 at addr ffff88802bf5d230 by task kworker/u32:3/5807 > > CPU: 1 UID: 0 PID: 5807 Comm: kworker/u32:3 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 > Workqueue: usbip_event event_handler > Call Trace: > <TASK> > __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 > vdev_to_vhci_hcd drivers/usb/usbip/vhci.h:171 [inline] > vhci_cleanup_unlink_list+0x44/0x456 drivers/usb/usbip/vhci_hcd.c:985 > vhci_device_unlink_cleanup drivers/usb/usbip/vhci_hcd.c:1028 [inline] > vhci_shutdown_connection.cold+0x165/0x37c drivers/usb/usbip/vhci_hcd.c:1069 > event_handler+0x216/0x570 drivers/usb/usbip/usbip_event.c:79 > 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 > </TASK> > > Allocated by task 1: > 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_noprof+0x322/0x820 mm/slub.c:5359 > _kmalloc_noprof include/linux/slab.h:992 [inline] > _kzalloc_noprof include/linux/slab.h:1309 [inline] > __usb_create_hcd+0x5e/0xac0 drivers/usb/core/hcd.c:2566 > vhci_hcd_probe+0x1a5/0x4e0 drivers/usb/usbip/vhci_hcd.c:1394 > platform_probe+0x106/0x1d0 drivers/base/platform.c:1439 > 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 > driver_probe_device+0x4a/0x140 drivers/base/dd.c:898 > __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026 > bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 > __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098 > device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153 > bus_probe_device+0x64/0x160 drivers/base/bus.c:620 > device_add+0x121d/0x1970 drivers/base/core.c:3772 > platform_device_add+0x35a/0x800 drivers/base/platform.c:762 > platform_device_register_full+0x5cf/0x830 drivers/base/platform.c:902 > vhci_hcd_init+0x1a1/0x2f0 drivers/usb/usbip/vhci_hcd.c:1557 > do_one_initcall+0x11d/0x700 init/main.c:1347 > do_initcall_level init/main.c:1409 [inline] > do_initcalls init/main.c:1425 [inline] > do_basic_setup init/main.c:1445 [inline] > kernel_init_freeable+0x6ea/0x7b0 init/main.c:1658 > kernel_init+0x1f/0x1e0 init/main.c:1548 > ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 > > Freed by task 5926: > 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 > hcd_release drivers/usb/core/hcd.c:2690 [inline] > kref_put include/linux/kref.h:65 [inline] > usb_put_hcd drivers/usb/core/hcd.c:2704 [inline] > usb_put_hcd+0x149/0x1f0 drivers/usb/core/hcd.c:2701 > vhci_hcd_remove+0xb5/0x1b0 drivers/usb/usbip/vhci_hcd.c:1431 > platform_remove+0x5f/0x80 drivers/base/platform.c:1456 > 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 > unbind_store+0xf8/0x110 drivers/base/bus.c:244 > 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 > > Last potentially related work creation: > kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 > kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:556 > insert_work+0x36/0x230 kernel/workqueue.c:2226 > __queue_work+0x9bc/0x12b0 kernel/workqueue.c:2401 > queue_work_on+0x1a9/0x1e0 kernel/workqueue.c:2452 > queue_work include/linux/workqueue.h:699 [inline] > usb_hcd_giveback_urb+0x330/0x4a0 drivers/usb/core/hcd.c:1758 > usb_rh_urb_dequeue drivers/usb/core/hcd.c:845 [inline] > unlink1+0x418/0x510 drivers/usb/core/hcd.c:1580 > usb_hcd_unlink_urb+0x131/0x210 drivers/usb/core/hcd.c:1617 > usb_kill_urb drivers/usb/core/urb.c:716 [inline] > usb_kill_urb+0x121/0x320 drivers/usb/core/urb.c:703 > hub_quiesce+0x1e9/0x320 drivers/usb/core/hub.c:1412 > hub_suspend+0x4ab/0x9e0 drivers/usb/core/hub.c:4008 > usb_suspend_interface drivers/usb/core/driver.c:1323 [inline] > usb_suspend_both+0x288/0x950 drivers/usb/core/driver.c:1446 > usb_runtime_suspend+0x49/0x120 drivers/usb/core/driver.c:2000 > __rpm_callback+0xc8/0x620 drivers/base/power/runtime.c:406 > rpm_callback+0x16a/0x1b0 drivers/base/power/runtime.c:460 > rpm_suspend+0x2f4/0x11a0 drivers/base/power/runtime.c:698 > __pm_runtime_suspend+0xba/0x1a0 drivers/base/power/runtime.c:1167 > pm_runtime_autosuspend include/linux/pm_runtime.h:415 [inline] > usb_runtime_idle+0x7e/0x90 drivers/usb/core/driver.c:2037 > rpm_idle+0x322/0x790 drivers/base/power/runtime.c:550 > pm_runtime_work+0x120/0x150 drivers/base/power/runtime.c:995 > 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 > > Second to last potentially related work creation: > kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 > kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:556 > insert_work+0x36/0x230 kernel/workqueue.c:2226 > __queue_work+0x9bc/0x12b0 kernel/workqueue.c:2401 > queue_work_on+0x1a9/0x1e0 kernel/workqueue.c:2452 > queue_work include/linux/workqueue.h:699 [inline] > usb_hcd_giveback_urb+0x3b8/0x4a0 drivers/usb/core/hcd.c:1760 > rh_call_control drivers/usb/core/hcd.c:706 [inline] > rh_urb_enqueue drivers/usb/core/hcd.c:817 [inline] > usb_hcd_submit_urb+0xab7/0x2150 drivers/usb/core/hcd.c:1538 > usb_submit_urb+0x827/0x19b0 drivers/usb/core/urb.c:586 > usb_start_wait_urb+0x10e/0x580 drivers/usb/core/message.c:62 > usb_internal_control_msg drivers/usb/core/message.c:117 [inline] > usb_control_msg+0x328/0x4b0 drivers/usb/core/message.c:167 > set_port_feature drivers/usb/core/hub.c:466 [inline] > hub_suspend+0x826/0x9e0 drivers/usb/core/hub.c:3996 > usb_suspend_interface drivers/usb/core/driver.c:1323 [inline] > usb_suspend_both+0x288/0x950 drivers/usb/core/driver.c:1446 > usb_runtime_suspend+0x49/0x120 drivers/usb/core/driver.c:2000 > __rpm_callback+0xc8/0x620 drivers/base/power/runtime.c:406 > rpm_callback+0x16a/0x1b0 drivers/base/power/runtime.c:460 > rpm_suspend+0x2f4/0x11a0 drivers/base/power/runtime.c:698 > __pm_runtime_suspend+0xba/0x1a0 drivers/base/power/runtime.c:1167 > pm_runtime_autosuspend include/linux/pm_runtime.h:415 [inline] > usb_runtime_idle+0x7e/0x90 drivers/usb/core/driver.c:2037 > rpm_idle+0x322/0x790 drivers/base/power/runtime.c:550 > pm_runtime_work+0x120/0x150 drivers/base/power/runtime.c:995 > 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 > > The buggy address belongs to the object at ffff88802bf5c000 > which belongs to the cache kmalloc-8k of size 8192 > The buggy address is located 4656 bytes inside of > freed 8192-byte region [ffff88802bf5c000, ffff88802bf5e000) > > The buggy address belongs to the physical page: > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2bf58 > head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 > flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) > page_type: f5(slab) > raw: 00fff00000000040 ffff88801bc43180 dead000000000122 0000000000000000 > raw: 0000000000000000 0000000800020002 00000000f5000000 0000000000000000 > head: 00fff00000000040 ffff88801bc43180 dead000000000122 0000000000000000 > head: 0000000000000000 0000000800020002 00000000f5000000 0000000000000000 > head: 00fff00000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff > head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 > page dumped because: kasan: bad access detected > page_owner tracks the page as allocated > page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 7941256619, free_ts 7717626992 > 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] > acpi_ut_initialize_buffer+0x144/0x220 drivers/acpi/acpica/utalloc.c:327 > acpi_rs_create_pci_routing_table+0x135/0xe00 drivers/acpi/acpica/rscreate.c:212 > acpi_rs_get_prt_method_data+0xc1/0x150 drivers/acpi/acpica/rsutils.c:456 > acpi_get_irq_routing_table+0xb8/0x140 drivers/acpi/acpica/rsxface.c:137 > acpi_pci_irq_find_prt_entry+0x179/0xdd0 drivers/acpi/pci_irq.c:215 > acpi_pci_irq_lookup+0x8e/0x6b0 drivers/acpi/pci_irq.c:299 > acpi_pci_irq_enable+0x1f5/0x6f0 drivers/acpi/pci_irq.c:414 > pcibios_enable_device+0xb6/0xe0 arch/x86/pci/common.c:699 > do_pci_enable_device+0x21f/0x4a0 drivers/pci/pci.c:1998 > page last free pid 1351 tgid 1351 stack trace: > reset_page_owner include/linux/page_owner.h:25 [inline] > __free_pages_prepare mm/page_alloc.c:1406 [inline] > free_pages_prepare+0x586/0xd80 mm/page_alloc.c:1451 > __free_contig_range_common+0x14f/0x250 mm/page_alloc.c:6897 > __free_contig_range mm/page_alloc.c:6942 [inline] > free_pages_bulk+0x12a/0x200 mm/page_alloc.c:5257 > vm_area_free_pages+0xad/0x2b0 mm/vmalloc.c:3439 > vfree mm/vmalloc.c:3488 [inline] > vfree+0x107/0x750 mm/vmalloc.c:3462 > delayed_vfree_work+0x56/0x80 mm/vmalloc.c:3392 > 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: > ffff88802bf5d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff88802bf5d180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > >ffff88802bf5d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ^ > ffff88802bf5d280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff88802bf5d300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ================================================================== > > > --- > 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. ^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2026-09-08 9:20 UTC | newest]
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[not found] <6a6d3cbd.6ce73036.24301b.000c.GAE@google.com>
2026-08-06 6:07 ` [syzbot] [usb?] KASAN: slab-use-after-free Read in vhci_cleanup_unlink_list syzbot
2026-09-08 9:20 ` Aleksandr Nogikh
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