syzbot


WARNING in ucan_probe

Status: upstream: reported C repro on 2025/02/17 11:55
Subsystems: can
[Documentation on labels]
Reported-by: syzbot+d7d8c418e8317899e88c@syzkaller.appspotmail.com
Fix commit: 1d22a122ffb1 can: ucan: fix out of bound read in strscpy() source
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-snapshot-upstream-root ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce], missing on: [ci-qemu-native-arm64-kvm ci-qemu2-arm32 ci-qemu2-riscv64 ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-linux-next-kasan-gce-root ci2-upstream-usb]
First crash: 38d, last: 5d19h
Cause bisection: introduced by (bisect log) :
commit b3e40fc85735b787ce65909619fcd173107113c2
Author: Oliver Neukum <oneukum@suse.com>
Date: Thu May 2 11:51:40 2024 +0000

  USB: usb_parse_endpoint: ignore reserved bits

Crash: WARNING in ucan_probe (log)
Repro: C syz .config
  
Discussions (4)
Title Replies (including bot) Last reply
[PATCH net 1/6] can: ucan: fix out of bound read in strscpy() source 2 (2) 2025/03/18 12:00
[PATCH] can: ucan: fix out of bound read in strscpy() source 2 (2) 2025/02/18 15:12
[PATCH] can: ucan: Correct the size parameter 5 (5) 2025/02/18 14:27
[syzbot] [can?] WARNING in ucan_probe 1 (4) 2025/02/17 18:16
Last patch testing requests (2)
Created Duration User Patch Repo Result
2025/02/17 18:16 33m zoo868e@gmail.com patch upstream OK log
2025/02/17 17:59 18m qasdev00@gmail.com patch upstream report log

Sample crash report:
------------[ cut here ]------------
strnlen: detected buffer overflow: 129 byte read of buffer size 128
WARNING: CPU: 0 PID: 9 at lib/string_helpers.c:1033 __fortify_report+0x9d/0xb0 lib/string_helpers.c:1032
Modules linked in:
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.14.0-rc2-syzkaller-00281-g496659003dac #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: usb_hub_wq hub_event
RIP: 0010:__fortify_report+0x9d/0xb0 lib/string_helpers.c:1032
Code: 84 ed 48 8b 33 48 c7 c0 a0 ae 80 8c 48 c7 c1 c0 ae 80 8c 48 0f 44 c8 48 c7 c7 20 ac 80 8c 4c 89 fa 4d 89 f0 e8 04 dd 8b fc 90 <0f> 0b 90 90 5b 41 5e 41 5f 5d c3 cc cc cc cc 0f 1f 40 00 90 90 90
RSP: 0018:ffffc900000e6b50 EFLAGS: 00010246
RAX: e8edca93825f5800 RBX: ffffffff8c80ab68 RCX: ffff88801c2f8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81817e32 R09: fffffbfff1d3a614
R10: dffffc0000000000 R11: fffffbfff1d3a614 R12: dffffc0000000000
R13: 1ffff9200001cd84 R14: 0000000000000080 R15: 0000000000000081
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d6c3b85e50 CR3: 0000000078508000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __fortify_panic+0x9/0x10 lib/string_helpers.c:1039
 _Z7strnlenPKcU25pass_dynamic_object_size1m include/linux/fortify-string.h:235 [inline]
 _Z13sized_strscpyPcU25pass_dynamic_object_size1PKcU25pass_dynamic_object_size1m include/linux/fortify-string.h:309 [inline]
 ucan_probe+0x195e/0x1980 drivers/net/can/usb/ucan.c:1535
 usb_probe_interface+0x641/0xbb0 drivers/usb/core/driver.c:396
 really_probe+0x2b9/0xad0 drivers/base/dd.c:658
 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
 driver_probe_device+0x50/0x430 drivers/base/dd.c:830
 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462
 __device_attach+0x333/0x520 drivers/base/dd.c:1030
 bus_probe_device+0x189/0x260 drivers/base/bus.c:537
 device_add+0x856/0xbf0 drivers/base/core.c:3665
 usb_set_configuration+0x1976/0x1fb0 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x88/0x140 drivers/usb/core/generic.c:250
 usb_probe_device+0x1b8/0x380 drivers/usb/core/driver.c:291
 really_probe+0x2b9/0xad0 drivers/base/dd.c:658
 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
 driver_probe_device+0x50/0x430 drivers/base/dd.c:830
 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462
 __device_attach+0x333/0x520 drivers/base/dd.c:1030
 bus_probe_device+0x189/0x260 drivers/base/bus.c:537
 device_add+0x856/0xbf0 drivers/base/core.c:3665
 usb_new_device+0x104a/0x19a0 drivers/usb/core/hub.c:2652
 hub_port_connect drivers/usb/core/hub.c:5523 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5663 [inline]
 port_event drivers/usb/core/hub.c:5823 [inline]
 hub_event+0x2d6d/0x5150 drivers/usb/core/hub.c:5905
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317
 worker_thread+0x870/0xd30 kernel/workqueue.c:3398
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Crashes (143):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/16 07:09 upstream 496659003dac 40a34ec9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/20 13:16 upstream a7f2e10ecd8f 3b7445cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/20 02:51 upstream a7f2e10ecd8f 3b7445cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/19 20:15 upstream 81e4f8d68c66 8d0a2921 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/19 17:32 upstream 81e4f8d68c66 8d0a2921 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/18 23:56 upstream fc444ada1310 22a6c2b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/18 17:22 upstream fc444ada1310 22a6c2b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/18 14:50 upstream fc444ada1310 22a6c2b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/18 04:09 upstream 4701f33a1070 ce3352cd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/17 20:19 upstream 4701f33a1070 948c34e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/17 18:39 upstream 4701f33a1070 948c34e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/17 12:49 upstream 4701f33a1070 948c34e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/17 02:47 upstream cb82ca153949 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in ucan_probe
2025/03/15 20:26 upstream 3571e8b091f4 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/15 16:15 upstream a29967be967e e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/15 13:59 upstream a29967be967e e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/15 13:09 upstream a29967be967e e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/15 12:08 upstream a29967be967e e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/14 19:54 upstream 695caca9345a e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/14 16:14 upstream 695caca9345a e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/14 13:35 upstream 4003c9e78778 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/14 11:02 upstream 4003c9e78778 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/14 09:22 upstream 4003c9e78778 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in ucan_probe
2025/03/13 21:06 upstream b7f94fcf5546 44be8b44 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/13 18:55 upstream b7f94fcf5546 44be8b44 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/13 03:50 upstream 0fed89a961ea 1a5d9317 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/13 01:39 upstream 0fed89a961ea 1a5d9317 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/12 18:14 upstream 0fed89a961ea ee70e6db .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/12 15:13 upstream 0fed89a961ea ee70e6db .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/12 14:11 upstream 0fed89a961ea ee70e6db .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/12 13:08 upstream 0fed89a961ea ee70e6db .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/12 10:00 upstream 0fed89a961ea ee70e6db .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/11 15:36 upstream 4d872d51bc9d 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/11 09:51 upstream 4d872d51bc9d 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/11 08:41 upstream 4d872d51bc9d 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/11 07:15 upstream 4d872d51bc9d 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/10 20:41 upstream 80e54e84911a 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/10 16:39 upstream 80e54e84911a 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in ucan_probe
2025/03/10 01:39 upstream 1110ce6a1e34 163f510d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in ucan_probe
2025/03/10 01:38 upstream 1110ce6a1e34 163f510d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in ucan_probe
2025/02/25 12:05 upstream d082ecbc71e9 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in ucan_probe
2025/03/19 18:59 upstream 81e4f8d68c66 8d0a2921 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in ucan_probe
2025/03/18 18:29 upstream 76b6905c11fd 22a6c2b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in ucan_probe
2025/03/16 03:36 upstream 3571e8b091f4 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in ucan_probe
2025/03/16 00:41 upstream 3571e8b091f4 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in ucan_probe
2025/03/14 07:20 upstream 4003c9e78778 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in ucan_probe
2025/03/12 17:43 upstream 0fed89a961ea ee70e6db .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in ucan_probe
2025/03/11 05:48 upstream 4d872d51bc9d 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in ucan_probe
* Struck through repros no longer work on HEAD.