================================================================== BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline] BUG: KASAN: use-after-free in atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1667 [inline] BUG: KASAN: use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:169 [inline] BUG: KASAN: use-after-free in mutex_lock+0x88/0x1a0 kernel/locking/mutex.c:288 Write of size 8 at addr ffff88811e40a050 by task udevd/491 CPU: 1 PID: 491 Comm: udevd Not tainted 5.15.185-syzkaller-1080615-g0d918fa8e88d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0xf1/0x140 mm/kasan/report.c:444 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x280/0x290 mm/kasan/generic.c:189 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1667 [inline] __mutex_trylock_fast kernel/locking/mutex.c:169 [inline] mutex_lock+0x88/0x1a0 kernel/locking/mutex.c:288 steam_input_open+0x91/0x160 drivers/hid/hid-steam.c:297 input_open_device+0x16d/0x2f0 drivers/input/input.c:640 evdev_open_device drivers/input/evdev.c:404 [inline] evdev_open+0x4b1/0x5c0 drivers/input/evdev.c:491 chrdev_open+0x597/0x670 fs/char_dev.c:414 do_dentry_open+0x834/0x1010 fs/open.c:828 vfs_open+0x73/0x80 fs/open.c:958 do_open fs/namei.c:3608 [inline] path_openat+0x2646/0x2f10 fs/namei.c:3742 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769 do_sys_openat2+0x14c/0x7b0 fs/open.c:1234 do_sys_open fs/open.c:1250 [inline] __do_sys_openat fs/open.c:1266 [inline] __se_sys_openat fs/open.c:1261 [inline] __x64_sys_openat+0x136/0x160 fs/open.c:1261 x64_sys_call+0x219/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fa407379407 Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff RSP: 002b:00007fff70e2ed80 EFLAGS: 00000202 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fa40728b880 RCX: 00007fa407379407 RDX: 0000000000080000 RSI: 000055562e917140 RDI: ffffffffffffff9c RBP: 000055562e927e00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 000055560b27e0c8 R13: 000055560b27e0ce R14: 00007fff70e2f380 R15: 000055560b284bcc Allocated by task 39: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] ____kasan_kmalloc mm/kasan/common.c:512 [inline] __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc_track_caller+0x13c/0x2c0 mm/slub.c:4954 alloc_dr drivers/base/devres.c:116 [inline] devm_kmalloc+0x50/0x150 drivers/base/devres.c:831 devm_kzalloc include/linux/device.h:209 [inline] steam_probe+0x129/0xb10 drivers/hid/hid-steam.c:741 hid_device_probe+0x287/0x380 drivers/hid/hid-core.c:2303 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x285/0x970 drivers/base/dd.c:595 __driver_probe_device+0x198/0x280 drivers/base/dd.c:755 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:429 __device_attach+0x2a2/0x400 drivers/base/dd.c:979 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489 device_add+0xb31/0xed0 drivers/base/core.c:3422 hid_add_device+0x356/0x4b0 drivers/hid/hid-core.c:2453 usbhid_probe+0xb2e/0xee0 drivers/hid/usbhid/hid-core.c:1424 usb_probe_interface+0x5ff/0xae0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x285/0x970 drivers/base/dd.c:595 __driver_probe_device+0x198/0x280 drivers/base/dd.c:755 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:429 __device_attach+0x2a2/0x400 drivers/base/dd.c:979 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489 device_add+0xb31/0xed0 drivers/base/core.c:3422 usb_set_configuration+0x19c2/0x1f10 drivers/usb/core/message.c:2165 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238 usb_probe_device+0x148/0x260 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x285/0x970 drivers/base/dd.c:595 __driver_probe_device+0x198/0x280 drivers/base/dd.c:755 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785 __device_attach_driver+0x2a6/0x460 drivers/base/dd.c:907 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:429 __device_attach+0x2a2/0x400 drivers/base/dd.c:979 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:489 device_add+0xb31/0xed0 drivers/base/core.c:3422 usb_new_device+0xd06/0x1620 drivers/usb/core/hub.c:2610 hub_port_connect drivers/usb/core/hub.c:5525 [inline] hub_port_connect_change drivers/usb/core/hub.c:5665 [inline] port_event drivers/usb/core/hub.c:5815 [inline] hub_event+0x27d8/0x42c0 drivers/usb/core/hub.c:5897 process_one_work+0x6be/0xba0 kernel/workqueue.c:2325 worker_thread+0xa59/0x1200 kernel/workqueue.c:2472 kthread+0x411/0x500 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Freed by task 39: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4a/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:365 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1749 slab_free mm/slub.c:3521 [inline] kfree+0xc4/0x270 mm/slub.c:4583 release_nodes+0xe8/0x220 drivers/base/devres.c:501 devres_release_all+0x149/0x1b0 drivers/base/devres.c:530 __device_release_driver drivers/base/dd.c:1231 [inline] device_release_driver_internal+0x4d0/0x760 drivers/base/dd.c:1262 device_release_driver+0x19/0x20 drivers/base/dd.c:1285 bus_remove_device+0x2dd/0x340 drivers/base/bus.c:531 device_del+0x696/0xe90 drivers/base/core.c:3610 hid_remove_device drivers/hid/hid-core.c:2501 [inline] hid_destroy_device+0x6a/0x110 drivers/hid/hid-core.c:2520 usbhid_disconnect+0x9f/0xc0 drivers/hid/usbhid/hid-core.c:1451 usb_unbind_interface+0x212/0x8c0 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1229 [inline] device_release_driver_internal+0x4c1/0x760 drivers/base/dd.c:1262 device_release_driver+0x19/0x20 drivers/base/dd.c:1285 bus_remove_device+0x2dd/0x340 drivers/base/bus.c:531 device_del+0x696/0xe90 drivers/base/core.c:3610 usb_disable_device+0x3a8/0x750 drivers/usb/core/message.c:1414 usb_disconnect+0x31e/0x850 drivers/usb/core/hub.c:2260 hub_port_connect drivers/usb/core/hub.c:5364 [inline] hub_port_connect_change drivers/usb/core/hub.c:5665 [inline] port_event drivers/usb/core/hub.c:5815 [inline] hub_event+0x190c/0x42c0 drivers/usb/core/hub.c:5897 process_one_work+0x6be/0xba0 kernel/workqueue.c:2325 process_scheduled_works kernel/workqueue.c:2388 [inline] worker_thread+0xd7b/0x1200 kernel/workqueue.c:2474 kthread+0x411/0x500 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff88811e40a000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 80 bytes inside of 512-byte region [ffff88811e40a000, ffff88811e40a200) The buggy address belongs to the page: page:ffffea0004790200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11e408 head:ffffea0004790200 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042f00 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 299, ts 29525648850, free_ts 19861018015 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485 __alloc_pages+0x18f/0x440 mm/page_alloc.c:5795 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1932 [inline] new_slab+0xa1/0x4d0 mm/slub.c:1995 ___slab_alloc+0x381/0x810 mm/slub.c:3028 __slab_alloc+0x49/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3250 [inline] kmem_cache_alloc_trace+0x146/0x270 mm/slub.c:3267 kmalloc include/linux/slab.h:616 [inline] kzalloc include/linux/slab.h:747 [inline] inetdev_init+0x84/0x500 net/ipv4/devinet.c:266 inetdev_event+0x1f8/0x10a0 net/ipv4/devinet.c:1545 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2057 [inline] call_netdevice_notifiers_extack net/core/dev.c:2069 [inline] call_netdevice_notifiers+0x111/0x190 net/core/dev.c:2083 register_netdevice+0x1039/0x13a0 net/core/dev.c:10436 register_netdev+0x3e/0x50 net/core/dev.c:10529 loopback_net_init+0x74/0x150 drivers/net/loopback.c:216 ops_init+0x1ba/0x4a0 net/core/net_namespace.c:138 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1472 [inline] free_pcp_prepare mm/page_alloc.c:1544 [inline] free_unref_page_prepare+0x542/0x550 mm/page_alloc.c:3534 free_unref_page+0xa2/0x550 mm/page_alloc.c:3616 free_the_page mm/page_alloc.c:805 [inline] free_compound_page+0x78/0xa0 mm/page_alloc.c:828 destroy_compound_page include/linux/mm.h:989 [inline] __put_compound_page+0x77/0xb0 mm/swap.c:111 __put_page+0xbc/0xe0 mm/swap.c:127 put_page include/linux/mm.h:1295 [inline] __skb_frag_unref include/linux/skbuff.h:3252 [inline] skb_release_data+0x3d3/0xa10 net/core/skbuff.c:673 skb_release_all net/core/skbuff.c:743 [inline] __kfree_skb+0x50/0x70 net/core/skbuff.c:757 sk_eat_skb include/net/sock.h:2750 [inline] tcp_recvmsg_locked+0x14ac/0x2640 net/ipv4/tcp.c:2517 tcp_recvmsg+0x21b/0x720 net/ipv4/tcp.c:2563 inet_recvmsg+0x134/0x470 net/ipv4/af_inet.c:861 sock_recvmsg_nosec net/socket.c:966 [inline] sock_recvmsg net/socket.c:984 [inline] sock_read_iter+0x2a2/0x340 net/socket.c:1057 call_read_iter include/linux/fs.h:2206 [inline] new_sync_read fs/read_write.c:404 [inline] vfs_read+0x68b/0xbe0 fs/read_write.c:485 ksys_read+0x140/0x240 fs/read_write.c:623 __do_sys_read fs/read_write.c:633 [inline] __se_sys_read fs/read_write.c:631 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:631 x64_sys_call+0x96d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 Memory state around the buggy address: ffff88811e409f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88811e409f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88811e40a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88811e40a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88811e40a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== hid 0003:28DE:1102.000B: No HID_FEATURE_REPORT submitted - nothing to read hid 0003:28DE:1102.000B: No HID_FEATURE_REPORT submitted - nothing to read hid 0003:28DE:1102.000B: No HID_FEATURE_REPORT submitted - nothing to read hid 0003:28DE:1102.000B: No HID_FEATURE_REPORT submitted - nothing to read hid 0003:28DE:1102.000B: No HID_FEATURE_REPORT submitted - nothing to read