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KASAN: use-after-free Write in steam_input_close

Status: upstream: reported C repro on 2024/10/08 20:27
Reported-by: syzbot+2669c17738f56c1b2203@syzkaller.appspotmail.com
First crash: 383d, last: 32d
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-1 KASAN: use-after-free Write in steam_input_close 24 1 397d 397d 0/2 auto-obsoleted due to no activity on 2024/12/23 19:41
android-6-1 KASAN: use-after-free Write in steam_input_close (2) 24 1 41d 41d 0/2 premoderation: reported on 2025/09/15 09:57
android-5-15 KASAN: use-after-free Write in steam_input_close origin:lts 24 C error 3 117d 413d 0/2 upstream: reported C repro on 2024/09/08 05:16
android-54 KASAN: use-after-free Write in steam_input_close 24 1 232d 232d 0/2 auto-obsoleted due to no activity on 2025/06/05 22:19
upstream KASAN: slab-use-after-free Read in steam_input_close usb input 19 2 230d 246d 0/29 auto-obsoleted due to no activity on 2025/06/08 06:57
linux-6.1 KASAN: use-after-free Read in steam_input_close 19 1 437d 437d 0/3 auto-obsoleted due to no activity on 2024/11/23 18:34
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2025/10/10 19:56 9m retest repro android13-5.10-lts report log
2025/10/08 23:20 8m retest repro android13-5.10-lts report log
2025/10/08 23:20 5m retest repro android13-5.10-lts report log
2025/10/08 23:20 9m retest repro android13-5.10-lts report log
2025/10/08 23:20 9m retest repro android13-5.10-lts report log
2025/10/08 23:20 6m retest repro android13-5.10-lts report log
2025/08/30 02:19 17m retest repro android13-5.10-lts report log
2025/08/30 02:19 15m retest repro android13-5.10-lts report log
2025/08/30 02:19 16m retest repro android13-5.10-lts report log
2025/07/28 05:08 6m retest repro android13-5.10-lts report log
▶ ▼ Fix bisection attempts (6)
Created Duration User Patch Repo Result
2025/09/02 03:28 2h20m bisect fix android13-5.10-lts OK (0) job log log
2025/06/30 14:45 2h22m bisect fix android13-5.10-lts OK (0) job log log
2025/05/31 04:26 1h29m bisect fix android13-5.10-lts OK (0) job log log
2025/04/10 20:07 1h30m bisect fix android13-5.10-lts OK (0) job log log
2025/02/16 06:38 1h16m bisect fix android13-5.10-lts OK (0) job log log
2025/01/15 21:40 1h02m bisect fix android13-5.10-lts OK (0) job log log

Sample crash report:
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic64_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:1515 [inline]
BUG: KASAN: use-after-free in atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:443 [inline]
BUG: KASAN: use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:173 [inline]
BUG: KASAN: use-after-free in mutex_lock+0x98/0x110 kernel/locking/mutex.c:298
Write of size 8 at addr ffff88810dc73c40 by task udevd/324

CPU: 0 PID: 324 Comm: udevd Not tainted 5.10.226-syzkaller-00326-gab7c0abef9cf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x81/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:452
 kasan_check_range+0x293/0x2a0 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]
 atomic64_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:1515 [inline]
 atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:443 [inline]
 __mutex_trylock_fast kernel/locking/mutex.c:173 [inline]
 mutex_lock+0x98/0x110 kernel/locking/mutex.c:298
 steam_input_close+0x90/0x1e0 drivers/hid/hid-steam.c:308
 input_close_device+0x269/0x300 drivers/input/input.c:694
 evdev_close_device drivers/input/evdev.c:414 [inline]
 evdev_release+0x7be/0x850 drivers/input/evdev.c:456
 __fput+0x33d/0x7b0 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x129/0x190 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xbf/0xd0 kernel/entry/common.c:172
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 syscall_exit_to_user_mode+0xa2/0x1a0 kernel/entry/common.c:274
 do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f26d4cda0a8
Code: 48 8b 05 83 9d 0d 00 64 c7 00 16 00 00 00 83 c8 ff 48 83 c4 20 5b c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 5b 48 8b 15 51 9d 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffdad93ecb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007f26d4baeae0 RCX: 00007f26d4cda0a8
RDX: 00007ffdad93edec RSI: 0000000000000001 RDI: 0000000000000008
RBP: 0000562559a2d140 R08: 0000562559a43180 R09: 00007f26d4db4b10
R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000000002
R13: 0000000000000000 R14: 00007ffdad93edec R15: 00007ffdad93ede0

Allocated by task 0:
(stack is not available)

Freed by task 5:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x121/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1595 [inline]
 slab_free_freelist_hook+0xc0/0x190 mm/slub.c:1621
 slab_free mm/slub.c:3203 [inline]
 kfree+0xc3/0x270 mm/slub.c:4191
 release_nodes+0x873/0x8f0 drivers/base/devres.c:524
 devres_release_all+0x7b/0xa0 drivers/base/devres.c:545
 __device_release_driver drivers/base/dd.c:1190 [inline]
 device_release_driver_internal+0x515/0x7c0 drivers/base/dd.c:1221
 device_release_driver+0x19/0x20 drivers/base/dd.c:1244
 bus_remove_device+0x2f8/0x360 drivers/base/bus.c:533
 device_del+0x68b/0xf00 drivers/base/core.c:3455
 hid_remove_device drivers/hid/hid-core.c:2501 [inline]
 hid_destroy_device+0x68/0x110 drivers/hid/hid-core.c:2520
 usbhid_disconnect+0x9e/0xc0 drivers/hid/usbhid/hid-core.c:1445
 usb_unbind_interface+0x1fa/0x8c0 drivers/usb/core/driver.c:459
 device_release_driver_internal+0x506/0x7c0 drivers/base/dd.c:1221
 device_release_driver+0x19/0x20 drivers/base/dd.c:1244
 bus_remove_device+0x2f8/0x360 drivers/base/bus.c:533
 device_del+0x68b/0xf00 drivers/base/core.c:3455
 usb_disable_device+0x380/0x720 drivers/usb/core/message.c:1411
 usb_disconnect+0x32a/0x890 drivers/usb/core/hub.c:2271
 hub_port_connect drivers/usb/core/hub.c:5296 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5597 [inline]
 port_event drivers/usb/core/hub.c:5747 [inline]
 hub_event+0x1e73/0x47c0 drivers/usb/core/hub.c:5829
 process_one_work+0x6dc/0xbd0 kernel/workqueue.c:2301
 process_scheduled_works kernel/workqueue.c:2363 [inline]
 worker_thread+0xe18/0x1510 kernel/workqueue.c:2449
 kthread+0x34b/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff88810dc73c00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 64 bytes inside of
 512-byte region [ffff88810dc73c00, ffff88810dc73e00)
The buggy address belongs to the page:
page:ffffea0004371c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10dc70
head:ffffea0004371c00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 0000000000000000 0000000100000001 ffff888100043080
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 84, ts 4652008922, free_ts 0
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x166/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x80/0x400 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x302/0x4b0 mm/slub.c:2791
 __slab_alloc+0x63/0xa0 mm/slub.c:2831
 slab_alloc_node mm/slub.c:2913 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 __kmalloc_track_caller+0x1f8/0x320 mm/slub.c:4536
 __kmalloc_reserve net/core/skbuff.c:144 [inline]
 __alloc_skb+0xbc/0x510 net/core/skbuff.c:212
 alloc_skb include/linux/skbuff.h:1126 [inline]
 alloc_skb_with_frags+0xa1/0x570 net/core/skbuff.c:5951
 sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2388
 unix_dgram_sendmsg+0x700/0x1f90 net/unix/af_unix.c:1725
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 __sys_sendto+0x545/0x700 net/socket.c:2006
 __do_sys_sendto net/socket.c:2018 [inline]
 __se_sys_sendto net/socket.c:2014 [inline]
 __x64_sys_sendto+0xe5/0x100 net/socket.c:2014
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88810dc73b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88810dc73b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88810dc73c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff88810dc73c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88810dc73d00: 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

Crashes (23):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/03 18:38 android13-5.10-lts ab7c0abef9cf 578925bc .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2024/12/02 19:40 android13-5.10-lts 79ee24eeea4a b499ea68 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2024/12/02 17:08 android13-5.10-lts 79ee24eeea4a b499ea68 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2024/12/01 04:44 android13-5.10-lts 139a6bb26d9d 68914665 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2024/12/01 03:39 android13-5.10-lts 139a6bb26d9d 68914665 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2024/11/27 11:27 android13-5.10-lts 139a6bb26d9d 52b38cc1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2024/10/08 22:34 android13-5.10-lts e5e5644ea27f 402f1df0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2024/10/08 21:36 android13-5.10-lts e5e5644ea27f 402f1df0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2024/10/08 20:21 android13-5.10-lts e5e5644ea27f 402f1df0 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2024/12/01 19:02 android13-5.10-lts 139a6bb26d9d 68914665 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2025/09/24 08:23 android13-5.10-lts 911f602c2237 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2025/09/24 08:21 android13-5.10-lts 911f602c2237 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2025/09/23 20:12 android13-5.10-lts 911f602c2237 e667a34f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2025/09/23 13:59 android13-5.10-lts 911f602c2237 0ac7291c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2025/09/23 12:04 android13-5.10-lts 911f602c2237 0ac7291c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2025/09/19 15:05 android13-5.10-lts 911f602c2237 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2025/09/19 14:31 android13-5.10-lts 911f602c2237 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2025/09/19 14:16 android13-5.10-lts 911f602c2237 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2025/09/17 10:05 android13-5.10-lts 911f602c2237 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2025/09/11 13:29 android13-5.10-lts 43931d9f8738 fdeaa69b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2025/04/27 13:23 android13-5.10-lts ba8b8b193394 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2025/03/07 06:57 android13-5.10-lts 3f5f2283d684 831e3629 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
2024/10/08 19:22 android13-5.10-lts e5e5644ea27f 402f1df0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: use-after-free Write in steam_input_close
* Struck through repros no longer work on HEAD.