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In-Reply-To: <6a937393.1d9ded08.62e62.0113.GAE@google.com> References: <6a937393.1d9ded08.62e62.0113.GAE@google.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Sun, Aug 30 2026, syzbot wrote: >================================================================== >BUG: KASAN: slab-use-after-free in k90_record_led_work+0x19a/0x1e0 drivers/hid/hid-corsair.c:235 >Read of size 1 at addr ffff88805dc14300 by task kworker/0:[ 120.589162][ T9] Read of size 1 at addr ffff88805dc14300 by task kworker/0:0/9 > >CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted syzkaller >0 PREEMPT_{RT,(full)} >Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 >Workqueue: events k90_record_led_work >Call Trace: > > dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 > print_address_description+0x55/0x1e0 mm/kasan/report.c:378 > print_report+0x58/0x70 mm/kasan/report.c:482 > kasan_report+0x117/0x150 mm/kasan/report.c:595 > k90_record_led_work+0x19a/0x1e0 drivers/hid/hid-corsair.c:235 > process_one_work kernel/workqueue.c:3387 [inline] > process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470 > worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551 > kthread+0x38b/0x470 kernel/kthread.c:436 > ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 > > >Allocated by task 5718: > kasan_save_stack mm/kasan/common.c:57 [inline] > kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 > poison_kmalloc_redzone mm/kasan/common.c:398 [inline] > __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 > kasan_kmalloc include/linux/kasan.h:263 [inline] > __kmalloc_cache_noprof+0x3d5/0x680 mm/slub.c:5563 > _kmalloc_noprof include/linux/slab.h:991 [inline] > _kzalloc_noprof include/linux/slab.h:1312 [inline] > k90_init_macro_functions drivers/hid/hid-corsair.c:474 [inline] > corsair_probe+0x21c/0xbc0 drivers/hid/hid-corsair.c:584 > __hid_device_probe drivers/hid/hid-core.c:2839 [inline] > hid_device_probe+0x46a/0x870 drivers/hid/hid-core.c:2878 > call_driver_probe drivers/base/dd.c:-1 [inline] > really_probe+0x254/0xae0 drivers/base/dd.c:706 > __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 > driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 > __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 > bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500 > __device_attach+0x2c7/0x450 drivers/base/dd.c:1098 > device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 > bus_probe_device+0x12d/0x220 drivers/base/bus.c:620 > device_add+0x7d7/0xb80 drivers/base/core.c:3776 > hid_add_device+0x272/0x3e0 drivers/hid/hid-core.c:3065 > usbhid_probe+0x9dc/0xde0 drivers/hid/usbhid/hid-core.c:1452 > usb_probe_interface+0x653/0xc60 drivers/usb/core/driver.c:396 > call_driver_probe drivers/base/dd.c:-1 [inline] > really_probe+0x254/0xae0 drivers/base/dd.c:706 > __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 > driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 > __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 > bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500 > __device_attach+0x2c7/0x450 drivers/base/dd.c:1098 > device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 > bus_probe_device+0x12d/0x220 drivers/base/bus.c:620 > device_add+0x7d7/0xb80 drivers/base/core.c:3776 > usb_set_configuration+0x1ad8/0x2180 drivers/usb/core/message.c:2268 > usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 > usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:291 > call_driver_probe drivers/base/dd.c:-1 [inline] > really_probe+0x254/0xae0 drivers/base/dd.c:706 > __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 > driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 > __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026 > bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500 > __device_attach+0x2c7/0x450 drivers/base/dd.c:1098 > device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153 > bus_probe_device+0x12d/0x220 drivers/base/bus.c:620 > device_add+0x7d7/0xb80 drivers/base/core.c:3776 > usb_new_device+0x99a/0x1680 drivers/usb/core/hub.c:2703 > hub_port_connect drivers/usb/core/hub.c:5575 [inline] > hub_port_connect_change drivers/usb/core/hub.c:5715 [inline] > port_event drivers/usb/core/hub.c:5879 [inline] > hub_event+0x28cf/0x4cf0 drivers/usb/core/hub.c:5961 > process_one_work kernel/workqueue.c:3387 [inline] > process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470 > worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551 > kthread+0x38b/0x470 kernel/kthread.c:436 > ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 > >Freed by task 5718: > kasan_save_stack mm/kasan/common.c:57 [inline] > kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 > kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584 > poison_slab_object mm/kasan/common.c:253 [inline] > __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 > kasan_slab_free include/linux/kasan.h:235 [inline] > slab_free_hook mm/slub.c:2748 [inline] > slab_free mm/slub.c:6499 [inline] > kfree+0x1c5/0x6d0 mm/slub.c:6792 > k90_cleanup_macro_functions drivers/hid/hid-corsair.c:547 [inline] > corsair_remove+0xfd/0x260 drivers/hid/hid-corsair.c:602 > hid_device_remove+0xc8/0x1d0 drivers/hid/hid-core.c:2897 > device_remove drivers/base/dd.c:616 [inline] > __device_release_driver drivers/base/dd.c:1349 [inline] > device_release_driver_internal+0x48b/0x880 drivers/base/dd.c:1372 > bus_remove_device+0x449/0x560 drivers/base/bus.c:664 > device_del+0x528/0x8f0 drivers/base/core.c:3965 > hid_remove_device drivers/hid/hid-core.c:3126 [inline] > hid_destroy_device+0x6b/0x1b0 drivers/hid/hid-core.c:3148 > usbhid_disconnect+0x9f/0xc0 drivers/hid/usbhid/hid-core.c:1479 > usb_unbind_interface+0x295/0x9f0 drivers/usb/core/driver.c:458 > device_remove drivers/base/dd.c:618 [inline] > __device_release_driver drivers/base/dd.c:1349 [inline] > device_release_driver_internal+0x4f5/0x880 drivers/base/dd.c:1372 > bus_remove_device+0x449/0x560 drivers/base/bus.c:664 > device_del+0x528/0x8f0 drivers/base/core.c:3965 > usb_disable_device+0x3d4/0x8d0 drivers/usb/core/message.c:1478 > usb_disconnect+0x32d/0x990 drivers/usb/core/hub.c:2345 > hub_port_connect drivers/usb/core/hub.c:5415 [inline] > hub_port_connect_change drivers/usb/core/hub.c:5715 [inline] > port_event drivers/usb/core/hub.c:5879 [inline] > hub_event+0x1bb7/0x4cf0 drivers/usb/core/hub.c:5961 > process_one_work kernel/workqueue.c:3387 [inline] > process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470 > worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551 > kthread+0x38b/0x470 kernel/kthread.c:436 > ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 > >Last potentially related work creation: > kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 > kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 > insert_work+0x3d/0x330 kernel/workqueue.c:2272 > __queue_work+0xd4b/0x1120 kernel/workqueue.c:2448 > queue_work_on+0x106/0x1d0 kernel/workqueue.c:2501 > led_classdev_unregister+0x113/0x270 drivers/leds/led-class.c:632 > k90_cleanup_macro_functions drivers/hid/hid-corsair.c:544 [inline] > corsair_remove+0xd7/0x260 drivers/hid/hid-corsair.c:602 > hid_device_remove+0xc8/0x1d0 drivers/hid/hid-core.c:2897 > device_remove drivers/base/dd.c:616 [inline] > __device_release_driver drivers/base/dd.c:1349 [inline] > device_release_driver_internal+0x48b/0x880 drivers/base/dd.c:1372 > bus_remove_device+0x449/0x560 drivers/base/bus.c:664 > device_del+0x528/0x8f0 drivers/base/core.c:3965 > hid_remove_device drivers/hid/hid-core.c:3126 [inline] > hid_destroy_device+0x6b/0x1b0 drivers/hid/hid-core.c:3148 > usbhid_disconnect+0x9f/0xc0 drivers/hid/usbhid/hid-core.c:1479 > usb_unbind_interface+0x295/0x9f0 drivers/usb/core/driver.c:458 > device_remove drivers/base/dd.c:618 [inline] > __device_release_driver drivers/base/dd.c:1349 [inline] > device_release_driver_internal+0x4f5/0x880 drivers/base/dd.c:1372 > bus_remove_device+0x449/0x560 drivers/base/bus.c:664 > device_del+0x528/0x8f0 drivers/base/core.c:3965 > usb_disable_device+0x3d4/0x8d0 drivers/usb/core/message.c:1478 > usb_disconnect+0x32d/0x990 drivers/usb/core/hub.c:2345 > hub_port_connect drivers/usb/core/hub.c:5415 [inline] > hub_port_connect_change drivers/usb/core/hub.c:5715 [inline] > port_event drivers/usb/core/hub.c:5879 [inline] > hub_event+0x1bb7/0x4cf0 drivers/usb/core/hub.c:5961 > process_one_work kernel/workqueue.c:3387 [inline] > process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470 > worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551 > kthread+0x38b/0x470 kernel/kthread.c:436 > ret_from_fork+0x514/0xb70 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 ffff88805dc14000 > which belongs to the cache kmalloc-1k of size 1024 >The buggy address is located 768 bytes inside of > freed 1024-byte region [ffff88805dc14000, ffff88805dc14400) > >The buggy address belongs to the physical page: >page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5dc10 >head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 >flags: 0x80000000000040(head|node=0|zone=1) >page_type: f5(slab) >raw: 0080000000000040 ffff88813ffb9dc0 dead000000000100 dead000000000122 >raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 >head: 0080000000000040 ffff88813ffb9dc0 dead000000000100 dead000000000122 >head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 >head: 0080000000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff >head: 0000000000000000 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 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1386, tgid 1386 (kworker/u8:12), ts 119040566074 > set_page_owner include/linux/page_owner.h:33 [inline] > post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871 > prep_new_page mm/page_alloc.c:1879 [inline] > get_page_from_freelist+0x2591/0x2600 mm/page_alloc.c:3943 > __alloc_frozen_pages_noprof+0x230/0x5c0 mm/page_alloc.c:5436 > alloc_slab_page mm/slub.c:3347 [inline] > allocate_slab+0x7d/0x620 mm/slub.c:3462 > new_slab mm/slub.c:3513 [inline] > refill_objects+0x2d8/0x350 mm/slub.c:7410 > refill_sheaf mm/slub.c:2885 [inline] > __pcs_replace_empty_main+0x339/0x690 mm/slub.c:4774 > alloc_from_pcs mm/slub.c:4850 [inline] > slab_alloc_node mm/slub.c:4984 [inline] > __do_kmalloc_node mm/slub.c:5413 [inline] > __kmalloc_noprof+0x54b/0x790 mm/slub.c:5439 > _kmalloc_noprof include/linux/slab.h:995 [inline] > _kzalloc_noprof include/linux/slab.h:1312 [inline] > ieee802_11_parse_elems_full+0x14b/0x2de0 net/mac80211/parse.c:1071 > ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2548 [inline] > ieee80211_inform_bss+0x163/0x10d0 net/mac80211/scan.c:79 > rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] > cfg80211_inform_single_bss_data+0xd98/0x1bf0 net/wireless/scan.c:2410 > cfg80211_inform_bss_data+0x263/0x3cc0 net/wireless/scan.c:3266 > cfg80211_inform_bss_frame_data+0x3c7/0x840 net/wireless/scan.c:3358 > ieee80211_bss_info_update+0x791/0xa50 net/mac80211/scan.c:230 > ieee80211_rx_bss_info net/mac80211/ibss.c:1065 [inline] > ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1546 [inline] > ieee80211_ibss_rx_queued_mgmt+0x1ce3/0x2c40 net/mac80211/ibss.c:1573 > ieee80211_iface_process_skb net/mac80211/iface.c:1769 [inline] > ieee80211_iface_work+0x78a/0x1010 net/mac80211/iface.c:1823 > cfg80211_wiphy_work+0x29e/0x420 net/wireless/core.c:541 >page last free pid 5696 tgid 5696 ts 118905325757 stack trace: > reset_page_owner include/linux/page_owner.h:26 [inline] > __free_pages_prepare mm/page_alloc.c:1418 [inline] > __free_frozen_pages+0xf8e/0x1070 mm/page_alloc.c:2962 > __slab_free+0x250/0x2a0 mm/slub.c:5815 > qlink_free mm/kasan/quarantine.c:163 [inline] > qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179 > kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 > __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 > kasan_slab_alloc include/linux/kasan.h:253 [inline] > slab_post_alloc_hook mm/slub.c:4683 [inline] > slab_alloc_node mm/slub.c:4996 [inline] > kmem_cache_alloc_noprof+0x360/0x690 mm/slub.c:5010 > alloc_filename fs/namei.c:147 [inline] > do_getname+0x2e/0x250 fs/namei.c:187 > class_filename_flags_constructor include/linux/fs.h:2587 [inline] > do_readlinkat+0xc8/0x510 fs/stat.c:569 > __do_sys_readlink fs/stat.c:605 [inline] > __se_sys_readlink fs/stat.c:602 [inline] > __x64_sys_readlink+0x7f/0x90 fs/stat.c:602 > do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] > do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > >Memory state around the buggy address: > ffff88805dc14200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff88805dc14280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >>ffff88805dc14300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ^ > ffff88805dc14380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff88805dc14400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >================================================================== I believe there is a patch for this already[1], but it has not been merged yet. Was written just as the merge window for v7.3 opened, so might have been the reason for not being merged. [1]: https://lore.kernel.org/all/20260817072831.139954-1-ccc194101@163.com/ Thanks, Jeffin.