syzbot has found a reproducer for the following issue on: HEAD commit: 811d22141369 usb: dwc3: exynos: add support for exynos7870 git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=13a0f078580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f429368eda610a89 dashboard link: https://syzkaller.appspot.com/bug?extid=8d1e36bdac78c72d4750 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10557da8580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17a0f078580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c0764bd2a6ef/disk-811d2214.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a8d014106735/vmlinux-811d2214.xz kernel image: https://storage.googleapis.com/syzbot-assets/80062d83482e/bzImage-811d2214.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8d1e36bdac78c72d4750@xxxxxxxxxxxxxxxxxxxxxxxxx input: failed to attach handler evdev to device input177, error: -2 ================================================================== BUG: KASAN: slab-use-after-free in steam_input_register+0x131f/0x14a0 drivers/hid/hid-steam.c:832 Write of size 8 at addr ffff888118f9a920 by task kworker/0:2/2806 CPU: 0 UID: 0 PID: 2806 Comm: kworker/0:2 Not tainted 6.14.0-rc3-syzkaller-00056-g811d22141369 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: events steam_work_unregister_cb Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xc3/0x620 mm/kasan/report.c:489 kasan_report+0xd9/0x110 mm/kasan/report.c:602 steam_input_register+0x131f/0x14a0 drivers/hid/hid-steam.c:832 steam_work_unregister_cb+0x127/0x190 drivers/hid/hid-steam.c:1095 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398 kthread+0x3af/0x750 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 3069: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4294 [inline] __kmalloc_node_track_caller_noprof+0x20b/0x4c0 mm/slub.c:4313 alloc_dr drivers/base/devres.c:119 [inline] devm_kmalloc+0xa5/0x260 drivers/base/devres.c:843 devm_kzalloc include/linux/device.h:328 [inline] steam_probe+0x132/0x1060 drivers/hid/hid-steam.c:1241 __hid_device_probe drivers/hid/hid-core.c:2713 [inline] hid_device_probe+0x349/0x700 drivers/hid/hid-core.c:2750 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x23e/0xa90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:958 bus_for_each_drv+0x157/0x1e0 drivers/base/bus.c:462 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537 device_add+0x114b/0x1a70 drivers/base/core.c:3665 hid_add_device+0x374/0xa60 drivers/hid/hid-core.c:2896 usbhid_probe+0xd32/0x1400 drivers/hid/usbhid/hid-core.c:1431 usb_probe_interface+0x300/0x9c0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x23e/0xa90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:958 bus_for_each_drv+0x157/0x1e0 drivers/base/bus.c:462 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537 device_add+0x114b/0x1a70 drivers/base/core.c:3665 usb_set_configuration+0x10cb/0x1c50 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:250 usb_probe_device+0xec/0x3e0 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x23e/0xa90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:958 bus_for_each_drv+0x157/0x1e0 drivers/base/bus.c:462 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537 device_add+0x114b/0x1a70 drivers/base/core.c:3665 usb_new_device+0xd09/0x1a20 drivers/usb/core/hub.c:2663 hub_port_connect drivers/usb/core/hub.c:5531 [inline] hub_port_connect_change drivers/usb/core/hub.c:5671 [inline] port_event drivers/usb/core/hub.c:5831 [inline] hub_event+0x2e58/0x4f40 drivers/usb/core/hub.c:5913 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398 kthread+0x3af/0x750 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Freed by task 8: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x37/0x50 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4609 [inline] kfree+0x294/0x480 mm/slub.c:4757 release_nodes+0x11e/0x240 drivers/base/devres.c:506 devres_release_group+0x1be/0x2a0 drivers/base/devres.c:689 hid_device_remove+0x107/0x260 drivers/hid/hid-core.c:2774 device_remove+0xc8/0x170 drivers/base/dd.c:567 __device_release_driver drivers/base/dd.c:1273 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1296 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579 device_del+0x396/0x9f0 drivers/base/core.c:3854 hid_remove_device drivers/hid/hid-core.c:2953 [inline] hid_destroy_device+0x19c/0x240 drivers/hid/hid-core.c:2975 usbhid_disconnect+0xa0/0xe0 drivers/hid/usbhid/hid-core.c:1458 usb_unbind_interface+0x1da/0x9a0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:569 [inline] device_remove+0x122/0x170 drivers/base/dd.c:561 __device_release_driver drivers/base/dd.c:1273 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1296 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579 device_del+0x396/0x9f0 drivers/base/core.c:3854 usb_disable_device+0x368/0x7e0 drivers/usb/core/message.c:1418 usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2316 hub_port_connect drivers/usb/core/hub.c:5371 [inline] hub_port_connect_change drivers/usb/core/hub.c:5671 [inline] port_event drivers/usb/core/hub.c:5831 [inline] hub_event+0x1bed/0x4f40 drivers/usb/core/hub.c:5913 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398 kthread+0x3af/0x750 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0x9b/0xb0 mm/kasan/generic.c:548 insert_work+0x36/0x230 kernel/workqueue.c:2183 __queue_work+0x97e/0x1080 kernel/workqueue.c:2339 queue_work_on+0x11a/0x140 kernel/workqueue.c:2390 hid_hw_close+0xaf/0xe0 drivers/hid/hid-core.c:2415 drop_ref+0x2c8/0x390 drivers/hid/hidraw.c:346 hidraw_disconnect+0x4b/0x60 drivers/hid/hidraw.c:642 hid_disconnect+0x13e/0x1b0 drivers/hid/hid-core.c:2325 hid_hw_stop+0x16/0x80 drivers/hid/hid-core.c:2370 steam_remove+0x1af/0x220 drivers/hid/hid-steam.c:1326 hid_device_remove+0xce/0x260 drivers/hid/hid-core.c:2769 device_remove+0xc8/0x170 drivers/base/dd.c:567 __device_release_driver drivers/base/dd.c:1273 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1296 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579 device_del+0x396/0x9f0 drivers/base/core.c:3854 hid_remove_device drivers/hid/hid-core.c:2953 [inline] hid_destroy_device+0x19c/0x240 drivers/hid/hid-core.c:2975 steam_remove+0xf0/0x220 drivers/hid/hid-steam.c:1334 hid_device_remove+0xce/0x260 drivers/hid/hid-core.c:2769 device_remove+0xc8/0x170 drivers/base/dd.c:567 __device_release_driver drivers/base/dd.c:1273 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1296 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579 device_del+0x396/0x9f0 drivers/base/core.c:3854 hid_remove_device drivers/hid/hid-core.c:2953 [inline] hid_destroy_device+0x19c/0x240 drivers/hid/hid-core.c:2975 usbhid_disconnect+0xa0/0xe0 drivers/hid/usbhid/hid-core.c:1458 usb_unbind_interface+0x1da/0x9a0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:569 [inline] device_remove+0x122/0x170 drivers/base/dd.c:561 __device_release_driver drivers/base/dd.c:1273 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1296 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579 device_del+0x396/0x9f0 drivers/base/core.c:3854 usb_disable_device+0x368/0x7e0 drivers/usb/core/message.c:1418 usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2316 hub_port_connect drivers/usb/core/hub.c:5371 [inline] hub_port_connect_change drivers/usb/core/hub.c:5671 [inline] port_event drivers/usb/core/hub.c:5831 [inline] hub_event+0x1bed/0x4f40 drivers/usb/core/hub.c:5913 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398 kthread+0x3af/0x750 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Second to last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0x9b/0xb0 mm/kasan/generic.c:548 insert_work+0x36/0x230 kernel/workqueue.c:2183 __queue_work+0x97e/0x1080 kernel/workqueue.c:2339 queue_work_on+0x11a/0x140 kernel/workqueue.c:2390 queue_work include/linux/workqueue.h:662 [inline] schedule_work include/linux/workqueue.h:723 [inline] steam_client_ll_open+0xab/0xf0 drivers/hid/hid-steam.c:1146 hid_hw_open+0xe2/0x170 drivers/hid/hid-core.c:2392 hidraw_open+0x274/0x7e0 drivers/hid/hidraw.c:308 chrdev_open+0x237/0x6a0 fs/char_dev.c:414 do_dentry_open+0x6cb/0x1390 fs/open.c:956 vfs_open+0x82/0x3f0 fs/open.c:1086 do_open fs/namei.c:3830 [inline] path_openat+0x1e88/0x2d80 fs/namei.c:3989 do_filp_open+0x20c/0x470 fs/namei.c:4016 do_sys_openat2+0x17a/0x1e0 fs/open.c:1428 do_sys_open fs/open.c:1443 [inline] __do_sys_openat fs/open.c:1459 [inline] __se_sys_openat fs/open.c:1454 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1454 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888118f9a800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 288 bytes inside of freed 1024-byte region [ffff888118f9a800, ffff888118f9ac00) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x118f98 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x200000000000040(head|node=0|zone=2) page_type: f5(slab) raw: 0200000000000040 ffff888100041dc0 0000000000000000 0000000000000001 raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 head: 0200000000000040 ffff888100041dc0 0000000000000000 0000000000000001 head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 head: 0200000000000003 ffffea000463e601 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 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 9, tgid 9 (kworker/0:1), ts 42449727568, free_ts 42278863331 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0xe76/0x2b90 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x21c/0x2290 mm/page_alloc.c:4739 alloc_pages_mpol+0xe7/0x410 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab mm/slub.c:2587 [inline] new_slab+0x23d/0x330 mm/slub.c:2640 ___slab_alloc+0xc41/0x1670 mm/slub.c:3826 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] __do_kmalloc_node mm/slub.c:4293 [inline] __kmalloc_node_track_caller_noprof+0x157/0x4c0 mm/slub.c:4313 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:609 __alloc_skb+0x164/0x380 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1331 [inline] alloc_uevent_skb+0x7d/0x210 lib/kobject_uevent.c:289 uevent_net_broadcast_untagged lib/kobject_uevent.c:326 [inline] kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline] kobject_uevent_env+0xca3/0x1870 lib/kobject_uevent.c:608 device_add+0x10e0/0x1a70 drivers/base/core.c:3646 hid_add_device+0x374/0xa60 drivers/hid/hid-core.c:2896 steam_probe+0xbd6/0x1060 drivers/hid/hid-steam.c:1297 __hid_device_probe drivers/hid/hid-core.c:2713 [inline] hid_device_probe+0x349/0x700 drivers/hid/hid-core.c:2750 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:1127 [inline] free_frozen_pages+0x653/0xde0 mm/page_alloc.c:2660 __put_partials+0x14c/0x170 mm/slub.c:3153 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x4e/0x70 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] __kmalloc_cache_noprof+0x153/0x3e0 mm/slub.c:4320 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] kobject_uevent_env+0x265/0x1870 lib/kobject_uevent.c:540 __device_release_driver drivers/base/dd.c:1285 [inline] device_release_driver_internal+0x51b/0x610 drivers/base/dd.c:1296 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579 device_del+0x396/0x9f0 drivers/base/core.c:3854 hid_remove_device drivers/hid/hid-core.c:2953 [inline] hid_destroy_device+0x19c/0x240 drivers/hid/hid-core.c:2975 usbhid_disconnect+0xa0/0xe0 drivers/hid/usbhid/hid-core.c:1458 usb_unbind_interface+0x1da/0x9a0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:569 [inline] device_remove+0x122/0x170 drivers/base/dd.c:561 __device_release_driver drivers/base/dd.c:1273 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1296 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579 Memory state around the buggy address: ffff888118f9a800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888118f9a880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888118f9a900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888118f9a980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888118f9aa00: 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.
