syzbot


KASAN: use-after-free Write in steam_input_open

Status: upstream: reported C repro on 2024/09/25 04:26
Bug presence: origin:lts
[Documentation on labels]
Reported-by: syzbot+a0f81bbeee70d7ff08f8@syzkaller.appspotmail.com
First crash: 60d, last: 4d03h
Bug presence (2)
Date Name Commit Repro Result
2024/09/28 lts (merge base) cac15753b8ce C [report] KASAN: use-after-free Write in steam_input_open
2024/09/28 upstream (ToT) ad46e8f95e93 C Didn't crash
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-15 KASAN: use-after-free Write in steam_input_open origin:lts C 23 4d01h 76d 0/2 upstream: reported C repro on 2024/09/08 02:35
android-5-10 KASAN: use-after-free Write in steam_input_open C inconclusive 6 61d 81d 0/2 upstream: reported C repro on 2024/09/03 09:12
Last patch testing requests (3)
Created Duration User Patch Repo Result
2024/10/16 08:48 6m retest repro android14-6.1 report log
2024/10/16 08:48 10m retest repro android14-6.1 report log
2024/10/16 08:48 10m retest repro android14-6.1 report log
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2024/11/19 17:43 1h39m bisect fix android14-6.1 OK (0) job log log

Sample crash report:
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
BUG: KASAN: use-after-free in atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1779 [inline]
BUG: KASAN: use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:176 [inline]
BUG: KASAN: use-after-free in mutex_lock+0xa4/0x1e0 kernel/locking/mutex.c:295
Write of size 8 at addr ffff8881240db450 by task udevd/301

CPU: 1 PID: 301 Comm: udevd Not tainted 6.1.99-syzkaller-00076-g5c7d0d4f4a38 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0x158/0x4e0 mm/kasan/report.c:427
 kasan_report+0x13c/0x170 mm/kasan/report.c:531
 kasan_check_range+0x294/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
 atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1779 [inline]
 __mutex_trylock_fast kernel/locking/mutex.c:176 [inline]
 mutex_lock+0xa4/0x1e0 kernel/locking/mutex.c:295
 steam_input_open+0x91/0x1a0 drivers/hid/hid-steam.c:297
 input_open_device+0x1a5/0x310 drivers/input/input.c:650
 evdev_open_device drivers/input/evdev.c:400 [inline]
 evdev_open+0x3df/0x620 drivers/input/evdev.c:487
 chrdev_open+0x4f7/0x620 fs/char_dev.c:414
 do_dentry_open+0x891/0x1250 fs/open.c:884
 vfs_open+0x73/0x80 fs/open.c:1015
 do_open fs/namei.c:3627 [inline]
 path_openat+0x2532/0x2d60 fs/namei.c:3784
 do_filp_open+0x230/0x480 fs/namei.c:3811
 do_sys_openat2+0x151/0x870 fs/open.c:1341
 do_sys_open fs/open.c:1357 [inline]
 __do_sys_openat fs/open.c:1373 [inline]
 __se_sys_openat fs/open.c:1368 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1368
 x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5827d839a4
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:00007ffe96346760 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5827d839a4
RDX: 0000000000080000 RSI: 000055c80c2047f0 RDI: 00000000ffffff9c
RBP: 000055c80c2047f0 R08: 000055c80c20f4d8 R09: 00007f5827e5eb10
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000
R13: 00007ffe96346928 R14: 0000000000000000 R15: 000055c80bd78ed5
 </TASK>

Allocated by task 303:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:379 [inline]
 __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:957 [inline]
 __kmalloc_node_track_caller+0xb3/0x1e0 mm/slab_common.c:977
 alloc_dr drivers/base/devres.c:116 [inline]
 devm_kmalloc+0x55/0x180 drivers/base/devres.c:825
 devm_kzalloc include/linux/device.h:211 [inline]
 steam_probe+0x12e/0xbe0 drivers/hid/hid-steam.c:741
 hid_device_probe+0x292/0x3a0 drivers/hid/hid-core.c:2624
 really_probe+0x2b8/0x920 drivers/base/dd.c:639
 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
 __device_attach+0x312/0x510 drivers/base/dd.c:1038
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487
 device_add+0xb60/0xf10 drivers/base/core.c:3689
 hid_add_device+0x3ad/0x510 drivers/hid/hid-core.c:2776
 usbhid_probe+0xc1f/0xff0 drivers/hid/usbhid/hid-core.c:1424
 usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:397
 really_probe+0x2b8/0x920 drivers/base/dd.c:639
 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
 __device_attach+0x312/0x510 drivers/base/dd.c:1038
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487
 device_add+0xb60/0xf10 drivers/base/core.c:3689
 usb_set_configuration+0x190f/0x1e80 drivers/usb/core/message.c:2165
 usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x144/0x260 drivers/usb/core/driver.c:294
 really_probe+0x2b8/0x920 drivers/base/dd.c:639
 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:808
 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:838
 __device_attach_driver+0x2e3/0x490 drivers/base/dd.c:966
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
 __device_attach+0x312/0x510 drivers/base/dd.c:1038
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
 bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487
 device_add+0xb60/0xf10 drivers/base/core.c:3689
 usb_new_device+0xf2f/0x1820 drivers/usb/core/hub.c:2645
 hub_port_connect drivers/usb/core/hub.c:5554 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5694 [inline]
 port_event drivers/usb/core/hub.c:5854 [inline]
 hub_event+0x2db1/0x4830 drivers/usb/core/hub.c:5936
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 process_scheduled_works kernel/workqueue.c:2362 [inline]
 worker_thread+0xd71/0x1260 kernel/workqueue.c:2448
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Freed by task 303:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1745 [inline]
 slab_free_freelist_hook mm/slub.c:1771 [inline]
 slab_free mm/slub.c:3684 [inline]
 __kmem_cache_free+0x218/0x3b0 mm/slub.c:3697
 kfree+0x7a/0xf0 mm/slab_common.c:1009
 release_nodes+0xf1/0x230 drivers/base/devres.c:503
 devres_release_all+0x148/0x1a0 drivers/base/devres.c:532
 device_unbind_cleanup drivers/base/dd.c:530 [inline]
 __device_release_driver drivers/base/dd.c:1288 [inline]
 device_release_driver_internal+0x5bb/0x870 drivers/base/dd.c:1309
 device_release_driver+0x19/0x20 drivers/base/dd.c:1332
 bus_remove_device+0x2fa/0x360 drivers/base/bus.c:529
 device_del+0x663/0xe90 drivers/base/core.c:3877
 hid_remove_device drivers/hid/hid-core.c:2824 [inline]
 hid_destroy_device+0x68/0x110 drivers/hid/hid-core.c:2843
 usbhid_disconnect+0x9e/0xc0 drivers/hid/usbhid/hid-core.c:1451
 usb_unbind_interface+0x1fa/0x8c0 drivers/usb/core/driver.c:459
 device_remove drivers/base/dd.c:550 [inline]
 __device_release_driver drivers/base/dd.c:1283 [inline]
 device_release_driver_internal+0x53e/0x870 drivers/base/dd.c:1309
 device_release_driver+0x19/0x20 drivers/base/dd.c:1332
 bus_remove_device+0x2fa/0x360 drivers/base/bus.c:529
 device_del+0x663/0xe90 drivers/base/core.c:3877
 usb_disable_device+0x380/0x720 drivers/usb/core/message.c:1414
 usb_disconnect+0x32a/0x890 drivers/usb/core/hub.c:2300
 hub_port_connect drivers/usb/core/hub.c:5393 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5694 [inline]
 port_event drivers/usb/core/hub.c:5854 [inline]
 hub_event+0x1ed8/0x4830 drivers/usb/core/hub.c:5936
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 process_scheduled_works kernel/workqueue.c:2362 [inline]
 worker_thread+0xd71/0x1260 kernel/workqueue.c:2448
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

The buggy address belongs to the object at ffff8881240db400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 80 bytes inside of
 512-byte region [ffff8881240db400, ffff8881240db600)

The buggy address belongs to the physical page:
page:ffffea0004903600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1240d8
head:ffffea0004903600 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 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 319, tgid 319 (udevd), ts 23570373886, free_ts 23566032803
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x213/0x220 mm/page_alloc.c:2590
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2597
 get_page_from_freelist+0x27ea/0x2870 mm/page_alloc.c:4425
 __alloc_pages+0x3a1/0x780 mm/page_alloc.c:5714
 alloc_slab_page+0x6c/0xf0
 allocate_slab mm/slub.c:1962 [inline]
 new_slab+0x90/0x3e0 mm/slub.c:2015
 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3203
 __slab_alloc+0x5d/0xa0 mm/slub.c:3302
 slab_alloc_node mm/slub.c:3387 [inline]
 __kmem_cache_alloc_node+0x1af/0x250 mm/slub.c:3460
 __do_kmalloc_node mm/slab_common.c:956 [inline]
 __kmalloc_node_track_caller+0xa2/0x1e0 mm/slab_common.c:977
 kmalloc_reserve net/core/skbuff.c:446 [inline]
 __alloc_skb+0x125/0x2d0 net/core/skbuff.c:515
 alloc_skb include/linux/skbuff.h:1290 [inline]
 alloc_skb_with_frags+0xa6/0x680 net/core/skbuff.c:6168
 sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2753
 unix_dgram_sendmsg+0x5b1/0x2050 net/unix/af_unix.c:1943
 sock_sendmsg_nosec net/socket.c:716 [inline]
 __sock_sendmsg net/socket.c:728 [inline]
 sock_write_iter+0x394/0x4e0 net/socket.c:1133
 call_write_iter include/linux/fs.h:2274 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0xaf6/0xed0 fs/read_write.c:584
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1498 [inline]
 free_pcp_prepare mm/page_alloc.c:1572 [inline]
 free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3498
 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3594
 free_the_page mm/page_alloc.c:798 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5803
 free_pages+0x7c/0x90 mm/page_alloc.c:5814
 __stack_depot_save+0x42c/0x480 lib/stackdepot.c:506
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x60/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1745 [inline]
 slab_free_freelist_hook mm/slub.c:1771 [inline]
 slab_free mm/slub.c:3684 [inline]
 kmem_cache_free+0x291/0x510 mm/slub.c:3706
 kernfs_put+0x392/0x520 fs/kernfs/dir.c:562
 sysfs_put include/linux/sysfs.h:657 [inline]
 __kobject_del+0x10f/0x300 lib/kobject.c:597
 kobject_del+0x45/0x60 lib/kobject.c:619
 device_del+0xcec/0xe90 drivers/base/core.c:3899
 device_unregister+0x15/0x40 drivers/base/core.c:3920
 usb_remove_ep_devs+0x50/0x80 drivers/usb/core/endpoint.c:188

Memory state around the buggy address:
 ffff8881240db300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881240db380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881240db400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff8881240db480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881240db500: 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
hid 0003:28DE:1102.0021: No HID_FEATURE_REPORT submitted -  nothing to read
hid 0003:28DE:1102.0021: No HID_FEATURE_REPORT submitted -  nothing to read
hid 0003:28DE:1102.0021: No HID_FEATURE_REPORT submitted -  nothing to read
hid 0003:28DE:1102.0021: No HID_FEATURE_REPORT submitted -  nothing to read
hid 0003:28DE:1102.0021: No HID_FEATURE_REPORT submitted -  nothing to read
hid 0003:28DE:1102.0021: No HID_FEATURE_REPORT submitted -  nothing to read
hid 0003:28DE:1102.0021: No HID_FEATURE_REPORT submitted -  nothing to read
hid 0003:28DE:1102.0021: No HID_FEATURE_REPORT submitted -  nothing to read

Crashes (10):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/09/25 05:33 android14-6.1 5c7d0d4f4a38 5643e0e9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in steam_input_open
2024/09/25 05:17 android14-6.1 5c7d0d4f4a38 5643e0e9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in steam_input_open
2024/09/25 04:17 android14-6.1 5c7d0d4f4a38 5643e0e9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in steam_input_open
2024/10/02 01:02 android14-6.1 1cdc168f1ef0 ea2b66a6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in steam_input_open
2024/09/30 12:23 android14-6.1 110595418159 bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in steam_input_open
2024/09/26 19:57 android14-6.1 9e167c1c27c5 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in steam_input_open
2024/09/25 09:22 android14-6.1 03b93dc707ed 349a68c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in steam_input_open
2024/09/25 01:53 android14-6.1 5c7d0d4f4a38 5643e0e9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in steam_input_open
2024/09/24 19:37 android14-6.1 2cd8ac816de5 5643e0e9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in steam_input_open
2024/09/24 19:35 android14-6.1 2cd8ac816de5 5643e0e9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in steam_input_open
* Struck through repros no longer work on HEAD.