syzbot

 sign-in | mailing list | source | docs
🐞 Open [128]
🐞 Fixed [70]
🐞 Invalid [219]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

KASAN: slab-out-of-bounds Read in mon_bin_event

Status: upstream: reported C repro on 2025/07/01 18:26
Reported-by: syzbot+ec475ee55a9be606e53c@syzkaller.appspotmail.com
First crash: 17d, last: 18h33m
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-12 KASAN: slab-out-of-bounds Read in mon_bin_event origin:upstream 17 C 18 4d23h 16d 0/1 premoderation: reported C repro on 2025/06/29 20:21
upstream KASAN: slab-out-of-bounds Read in mon_bin_event usb 17 C 21 4h34m 13d 0/29 upstream: reported C repro on 2025/07/02 17:42
android-5-15 KASAN: slab-out-of-bounds Read in mon_bin_event 17 1 15d 15d 0/2 premoderation: reported on 2025/06/30 17:27
android-6-1 KASAN: slab-out-of-bounds Read in mon_bin_event 17 1 4d05h 4d05h 0/2 premoderation: reported on 2025/07/12 10:50

Sample crash report:
usb 1-1: config 0 descriptor??
microsoft 0003:045E:07DA.0001: unknown main item tag 0x0
microsoft 0003:045E:07DA.0001: ignoring exceeding usage max
==================================================================
BUG: KASAN: slab-out-of-bounds in mon_copy_to_buff drivers/usb/mon/mon_bin.c:249 [inline]
BUG: KASAN: slab-out-of-bounds in mon_bin_get_data drivers/usb/mon/mon_bin.c:417 [inline]
BUG: KASAN: slab-out-of-bounds in mon_bin_event+0x1307/0x24e0 drivers/usb/mon/mon_bin.c:603
Read of size 832 at addr ffff88811cf8eed9 by task kworker/1:1/25

CPU: 1 PID: 25 Comm: kworker/1:1 Not tainted 5.10.238-syzkaller-00008-g59e9a7228857 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: usb_hub_wq hub_event
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0xe2/0x130 mm/kasan/report.c:452
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x280/0x290 mm/kasan/generic.c:189
 memcpy+0x2d/0x70 mm/kasan/shadow.c:65
 mon_copy_to_buff drivers/usb/mon/mon_bin.c:249 [inline]
 mon_bin_get_data drivers/usb/mon/mon_bin.c:417 [inline]
 mon_bin_event+0x1307/0x24e0 drivers/usb/mon/mon_bin.c:603
 mon_bin_submit+0x27/0x30 drivers/usb/mon/mon_bin.c:623
 mon_bus_submit drivers/usb/mon/mon_main.c:91 [inline]
 mon_submit+0x185/0x200 drivers/usb/mon/mon_main.c:103
 usbmon_urb_submit include/linux/usb/hcd.h:723 [inline]
 usb_hcd_submit_urb+0x117/0x1780 drivers/usb/core/hcd.c:1543
 usb_submit_urb+0x10eb/0x1620 drivers/usb/core/urb.c:585
 usb_start_wait_urb+0x117/0x2f0 drivers/usb/core/message.c:58
 usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
 usb_control_msg+0x241/0x3f0 drivers/usb/core/message.c:153
 usbhid_set_raw_report drivers/hid/usbhid/hid-core.c:928 [inline]
 usbhid_raw_request+0x453/0x580 drivers/hid/usbhid/hid-core.c:1296
 __hid_request+0x1d2/0x390 drivers/hid/hid-core.c:1737
 hidinput_change_resolution_multipliers drivers/hid/hid-input.c:1657 [inline]
 hidinput_connect+0x1d6d/0x2c30 drivers/hid/hid-input.c:1963
 hid_connect+0x458/0xdf0 drivers/hid/hid-core.c:1968
 hid_hw_start+0xaa/0x130 drivers/hid/hid-core.c:2075
 ms_probe+0x190/0x460 drivers/hid/hid-microsoft.c:391
 hid_device_probe+0x287/0x380 drivers/hid/hid-core.c:2303
 really_probe+0x386/0xa90 drivers/base/dd.c:558
 driver_probe_device+0xe7/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:433
 __device_attach+0x29a/0x400 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8b4/0xbf0 drivers/base/core.c:3273
 hid_add_device+0x356/0x4b0 drivers/hid/hid-core.c:2455
 usbhid_probe+0xb2e/0xee0 drivers/hid/usbhid/hid-core.c:1418
 usb_probe_interface+0x5ff/0xae0 drivers/usb/core/driver.c:397
 really_probe+0x3d8/0xa90 drivers/base/dd.c:562
 driver_probe_device+0xe7/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:433
 __device_attach+0x29a/0x400 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8b4/0xbf0 drivers/base/core.c:3273
 usb_set_configuration+0x1a47/0x1f80 drivers/usb/core/message.c:2160
 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x148/0x260 drivers/usb/core/driver.c:294
 really_probe+0x3d8/0xa90 drivers/base/dd.c:562
 driver_probe_device+0xe7/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:433
 __device_attach+0x29a/0x400 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8b4/0xbf0 drivers/base/core.c:3273
 usb_new_device+0xcd1/0x1450 drivers/usb/core/hub.c:2626
 hub_port_connect drivers/usb/core/hub.c:5469 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5609 [inline]
 port_event drivers/usb/core/hub.c:5759 [inline]
 hub_event+0x2679/0x4120 drivers/usb/core/hub.c:5841
 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301
 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Allocated by task 25:
 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:430 [inline]
 ____kasan_kmalloc mm/kasan/common.c:509 [inline]
 __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 __kmalloc+0x1a7/0x330 mm/slub.c:4033
 kmalloc include/linux/slab.h:557 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 hid_alloc_report_buf drivers/hid/hid-core.c:1663 [inline]
 __hid_request+0x9a/0x390 drivers/hid/hid-core.c:1728
 hidinput_change_resolution_multipliers drivers/hid/hid-input.c:1657 [inline]
 hidinput_connect+0x1d6d/0x2c30 drivers/hid/hid-input.c:1963
 hid_connect+0x458/0xdf0 drivers/hid/hid-core.c:1968
 hid_hw_start+0xaa/0x130 drivers/hid/hid-core.c:2075
 ms_probe+0x190/0x460 drivers/hid/hid-microsoft.c:391
 hid_device_probe+0x287/0x380 drivers/hid/hid-core.c:2303
 really_probe+0x386/0xa90 drivers/base/dd.c:558
 driver_probe_device+0xe7/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:433
 __device_attach+0x29a/0x400 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8b4/0xbf0 drivers/base/core.c:3273
 hid_add_device+0x356/0x4b0 drivers/hid/hid-core.c:2455
 usbhid_probe+0xb2e/0xee0 drivers/hid/usbhid/hid-core.c:1418
 usb_probe_interface+0x5ff/0xae0 drivers/usb/core/driver.c:397
 really_probe+0x3d8/0xa90 drivers/base/dd.c:562
 driver_probe_device+0xe7/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:433
 __device_attach+0x29a/0x400 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8b4/0xbf0 drivers/base/core.c:3273
 usb_set_configuration+0x1a47/0x1f80 drivers/usb/core/message.c:2160
 usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x148/0x260 drivers/usb/core/driver.c:294
 really_probe+0x3d8/0xa90 drivers/base/dd.c:562
 driver_probe_device+0xe7/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:433
 __device_attach+0x29a/0x400 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8b4/0xbf0 drivers/base/core.c:3273
 usb_new_device+0xcd1/0x1450 drivers/usb/core/hub.c:2626
 hub_port_connect drivers/usb/core/hub.c:5469 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5609 [inline]
 port_event drivers/usb/core/hub.c:5759 [inline]
 hub_event+0x2679/0x4120 drivers/usb/core/hub.c:5841
 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301
 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

The buggy address belongs to the object at ffff88811cf8eed8
 which belongs to the cache kmalloc-8 of size 8
The buggy address is located 1 bytes inside of
 8-byte region [ffff88811cf8eed8, ffff88811cf8eee0)
The buggy address belongs to the page:
page:ffffea000473e380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11cf8e
flags: 0x4000000000000200(slab)
raw: 4000000000000200 dead000000000100 dead000000000122 ffff888100043c80
raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 259, ts 17051480664, free_ts 17051018871
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x179/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2235/0x23d0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x268/0x5f0 mm/page_alloc.c:5357
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x2a6/0x450 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+0x201/0x330 mm/slub.c:4029
 __kmalloc_node include/linux/slab.h:418 [inline]
 kmalloc_node include/linux/slab.h:575 [inline]
 kvmalloc_node+0x88/0x130 mm/util.c:612
 kvmalloc include/linux/mm.h:822 [inline]
 kvzalloc include/linux/mm.h:830 [inline]
 proc_sys_call_handler+0x3a9/0x790 fs/proc/proc_sysctl.c:573
 proc_sys_read+0x1f/0x30 fs/proc/proc_sysctl.c:611
 call_read_iter include/linux/fs.h:2060 [inline]
 new_sync_read fs/read_write.c:415 [inline]
 vfs_read+0x874/0xa10 fs/read_write.c:496
 ksys_read+0x140/0x240 fs/read_write.c:634
 __do_sys_read fs/read_write.c:644 [inline]
 __se_sys_read fs/read_write.c:642 [inline]
 __x64_sys_read+0x7b/0x90 fs/read_write.c:642
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 free_pcp_prepare mm/page_alloc.c:1421 [inline]
 free_unref_page_prepare+0x2b7/0x2d0 mm/page_alloc.c:3336
 free_unref_page mm/page_alloc.c:3391 [inline]
 free_the_page mm/page_alloc.c:5416 [inline]
 __free_pages+0x14b/0x380 mm/page_alloc.c:5427
 free_pages+0x82/0x90 mm/page_alloc.c:5438
 _pgd_free arch/x86/mm/pgtable.c:420 [inline]
 pgd_free+0x187/0x1a0 arch/x86/mm/pgtable.c:476
 mm_free_pgd kernel/fork.c:675 [inline]
 __mmdrop+0xad/0x490 kernel/fork.c:726
 mmdrop include/linux/sched/mm.h:49 [inline]
 finish_task_switch+0x1e2/0x5a0 kernel/sched/core.c:3905
 schedule_tail+0x18/0xc0 kernel/sched/core.c:3982
 ret_from_fork+0x8/0x30 arch/x86/entry/entry_64.S:283

Memory state around the buggy address:
 ffff88811cf8ed80: fc fc fc 00 fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88811cf8ee00: fc fc fc fc fc fc fc fa fc fc fc fc fc f

Crashes (28):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/01 18:15 android13-5.10-lts 59e9a7228857 091a06cd .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/15 22:11 android13-5.10-lts 09ea5912bc1f 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/15 21:54 android13-5.10-lts 09ea5912bc1f 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/12 18:26 android13-5.10-lts 59e9a7228857 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/12 12:01 android13-5.10-lts 59e9a7228857 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/11 16:45 android13-5.10-lts 59e9a7228857 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/09 13:28 android13-5.10-lts 59e9a7228857 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/07 14:35 android13-5.10-lts 59e9a7228857 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/07 01:07 android13-5.10-lts 59e9a7228857 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/07 01:05 android13-5.10-lts 59e9a7228857 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/06 17:30 android13-5.10-lts 59e9a7228857 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/04 23:02 android13-5.10-lts 59e9a7228857 d869b261 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/04 22:59 android13-5.10-lts 59e9a7228857 d869b261 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/04 22:58 android13-5.10-lts 59e9a7228857 d869b261 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/02 08:39 android13-5.10-lts 59e9a7228857 bc80e4f0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/02 03:23 android13-5.10-lts 59e9a7228857 091a06cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/02 02:15 android13-5.10-lts 59e9a7228857 091a06cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/02 02:15 android13-5.10-lts 59e9a7228857 091a06cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/02 02:14 android13-5.10-lts 59e9a7228857 091a06cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/02 02:14 android13-5.10-lts 59e9a7228857 091a06cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/02 02:13 android13-5.10-lts 59e9a7228857 091a06cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/02 02:12 android13-5.10-lts 59e9a7228857 091a06cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/01 22:16 android13-5.10-lts 59e9a7228857 091a06cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/01 14:08 android13-5.10-lts 59e9a7228857 091a06cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/07/01 10:52 android13-5.10-lts 59e9a7228857 6e83b42d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/06/30 11:05 android13-5.10-lts 59e9a7228857 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/06/29 18:59 android13-5.10-lts 59e9a7228857 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
2025/06/29 03:51 android13-5.10-lts 59e9a7228857 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 KASAN: slab-out-of-bounds Read in mon_bin_event
* Struck through repros no longer work on HEAD.