KASAN: slab-use-after-free Read in steam_input_open

Status: fixed on 2025/06/10 16:19
Subsystems: input usb
[Documentation on labels]
Reported-by: syzbot+0154da2d403396b2bd59@syzkaller.appspotmail.com
Fix commit: e53fc232a65f HID: hid-steam: Fix use-after-free when detaching device
First crash: 524d, last: 508d
Cause bisection: introduced by (bisect log) :
commit 79504249d7e27cad4a3eeb9afc6386e418728ce0
Author: Vicki Pfau <vi@endrift.com>
Date: Wed Feb 5 03:55:27 2025 +0000

  HID: hid-steam: Move hidraw input (un)registering to work

Crash: KASAN: slab-use-after-free Write in steam_input_register (log)
Repro: syz .config
  
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [input?] [usb?] KASAN: slab-use-after-free Read in steam_input_open 14 (28) 2025/02/24 12:44
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-54 KASAN: use-after-free Write in steam_input_open 22 syz, C 29 448d 519d 0/2 upstream: reported C repro on 2025/02/24 11:20
linux-6.1 KASAN: use-after-free Read in steam_input_open origin:lts-only 19 syz, C done 6 75d 509d 0/3 upstream: reported C repro on 2025/03/06 15:18
android-5-15 KASAN: use-after-free Write in steam_input_open origin:lts 22 syz, C 106 5d01h 689d 0/2 upstream: reported C repro on 2024/09/08 02:35
linux-5.15 KASAN: use-after-free Read in steam_input_open origin:lts-only 19 syz, C done 20 12d 510d 0/3 upstream: reported C repro on 2025/03/06 06:53
android-6-1 KASAN: use-after-free Write in steam_input_open origin:lts 22 syz, C 103 11d 672d 0/2 upstream: reported C repro on 2024/09/25 04:26
android-5-10 KASAN: use-after-free Write in steam_input_open 22 syz, C inconclusive 240 74d 694d 0/2 upstream: reported C repro on 2024/09/03 09:12
▶ ▼ Last patch testing requests (13)
Created Duration User Patch Repo Result
2025/02/24 12:24 13m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing report log
2025/02/24 12:04 5m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing error
2025/02/24 10:41 19m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master OK log
2025/02/24 04:54 8m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2025/02/23 14:32 14m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing report log
2025/02/23 14:16 3m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing error
2025/02/23 13:25 9m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing report log
2025/02/23 11:39 8m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2025/02/23 09:23 14m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing error
2025/02/23 09:04 12m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2025/02/23 07:30 15m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2025/02/23 02:54 52m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2025/02/23 00:28 13m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log

Sample crash report:
==================================================================
BUG: KASAN: slab-use-after-free in steam_input_open+0x14d/0x160 drivers/hid/hid-steam.c:604
Read of size 8 at addr ffff88810636f130 by task acpid/2827

CPU: 0 UID: 0 PID: 2827 Comm: acpid Not tainted 6.14.0-rc3-syzkaller-00056-g811d22141369 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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_open+0x14d/0x160 drivers/hid/hid-steam.c:604
 input_open_device+0x230/0x390 drivers/input/input.c:600
 evdev_open_device drivers/input/evdev.c:391 [inline]
 evdev_open+0x52d/0x690 drivers/input/evdev.c:478
 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
RIP: 0033:0x7f66950709a4
Code: 24 20 48 8d 44 24 30 48 89 44 24 28 64 8b 04 25 18 00 00 00 85 c0 75 2c 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 60 48 8b 15 55 a4 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff396ee420 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fff396ee728 RCX: 00007f66950709a4
RDX: 0000000000080800 RSI: 00007fff396ee608 RDI: 00000000ffffff9c
RBP: 00007fff396ee608 R08: 00000000000000f4 R09: 00007fff396ee608
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080800
R13: 0000000000000040 R14: 00007fff396ee708 R15: 00007fff396ee608
 </TASK>

Allocated by task 9:
 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 9:
 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+0x186/0x390 drivers/hid/hidraw.c:360
 hidraw_release+0x3e6/0x560 drivers/hid/hidraw.c:384
 __fput+0x3ff/0xb70 fs/file_table.c:464
 __fput_sync+0xa1/0xc0 fs/file_table.c:550
 __do_sys_close fs/open.c:1580 [inline]
 __se_sys_close fs/open.c:1565 [inline]
 __x64_sys_close+0x86/0x100 fs/open.c:1565
 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

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 ffff88810636f000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 304 bytes inside of
 freed 1024-byte region [ffff88810636f000, ffff88810636f400)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106368
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x200000000000040(head|node=0|zone=2)
page_type: f5(slab)
raw: 0200000000000040 ffff888100041dc0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 0200000000000040 ffff888100041dc0 dead000000000100 dead000000000122
head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 0200000000000003 ffffea000418da01 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 1, tgid 1 (swapper/0), ts 5191211838, free_ts 0
 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_slab_page mm/slub.c:2425 [inline]
 allocate_slab mm/slub.c:2587 [inline]
 new_slab+0x94/0x330 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]
 __kmalloc_cache_node_noprof+0x21b/0x3f0 mm/slub.c:4333
 kmalloc_node_noprof include/linux/slab.h:924 [inline]
 blk_mq_alloc_hctx block/blk-mq.c:3945 [inline]
 blk_mq_alloc_and_init_hctx+0x639/0x11b0 block/blk-mq.c:4448
 blk_mq_realloc_hw_ctxs+0x8e0/0xbe0 block/blk-mq.c:4481
 blk_mq_init_allocated_queue+0x39e/0x11f0 block/blk-mq.c:4535
 blk_mq_alloc_queue+0x1c3/0x290 block/blk-mq.c:4348
 scsi_alloc_sdev+0x890/0xd80 drivers/scsi/scsi_scan.c:338
 scsi_probe_and_add_lun+0x525/0x7b0 drivers/scsi/scsi_scan.c:1209
 __scsi_scan_target+0x1e6/0x4e0 drivers/scsi/scsi_scan.c:1774
 scsi_scan_channel drivers/scsi/scsi_scan.c:1862 [inline]
 scsi_scan_channel+0x149/0x1e0 drivers/scsi/scsi_scan.c:1838
 scsi_scan_host_selected+0x2ae/0x370 drivers/scsi/scsi_scan.c:1891
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88810636f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88810636f080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88810636f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff88810636f180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88810636f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/06 13:54 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 811d22141369 831e3629 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-upstream-usb KASAN: slab-use-after-free Read in steam_input_open
2025/02/20 03:19 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 0a86e49acfbb b257a9b7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-upstream-usb KASAN: slab-use-after-free Read in steam_input_open
2025/02/21 10:00 upstream 27eddbf34490 0808a665 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce KASAN: slab-use-after-free Read in steam_input_open
2025/03/08 00:13 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing b331a3d8097f 7e3bd60d .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-upstream-usb KASAN: slab-use-after-free Read in steam_input_open
2025/03/06 01:36 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 811d22141369 831e3629 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb KASAN: slab-use-after-free Read in steam_input_open
* Struck through repros no longer work on HEAD.