Hello,
syzbot found the following crash on:
HEAD commit: 6a3599ce usb-fuzzer: main usb gadget fuzzer driver
git tree: https://github.com/google/kasan.git usb-fuzzer
console output: https://syzkaller.appspot.com/x/log.txt?x=17eb58cc600000
kernel config: https://syzkaller.appspot.com/x/.config?x=700ca426ab83faae
dashboard link: https://syzkaller.appspot.com/bug?extid=c44bb3aca1a5e07c76df
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14ebb65c600000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17d95382600000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+c44bb3aca1a5e07c76df@xxxxxxxxxxxxxxxxxxxxxxxxx
------------[ cut here ]------------
list_del corruption, ffff8881d0a03130->next is LIST_POISON1
(dead000000000100)
WARNING: CPU: 0 PID: 5 at lib/list_debug.c:45
__list_del_entry_valid+0xd3/0x170 lib/list_debug.c:45
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.2.0-rc6+ #15
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0xca/0x13e lib/dump_stack.c:113
panic+0x292/0x6c9 kernel/panic.c:219
__warn.cold+0x20/0x4b kernel/panic.c:576
report_bug+0x262/0x2a0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:179 [inline]
fixup_bug arch/x86/kernel/traps.c:174 [inline]
do_error_trap+0x12b/0x1e0 arch/x86/kernel/traps.c:272
do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:291
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:986
RIP: 0010:__list_del_entry_valid+0xd3/0x170 lib/list_debug.c:45
Code: 93 00 00 00 49 8b 55 08 48 39 f2 75 51 b8 01 00 00 00 48 83 c4 08 41
5c 41 5d c3 4c 89 ea 48 c7 c7 40 0b ba 85 e8 c8 d1 33 ff <0f> 0b 48 83 c4
08 31 c0 41 5c 41 5d c3 4c 89 e2 48 c7 c7 a0 0b ba
RSP: 0018:ffff8881d9dc6d80 EFLAGS: 00010086
RAX: 0000000000000000 RBX: ffff8881d0a030c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8127ef3d RDI: ffffed103b3b8da2
RBP: 0000000000000000 R08: ffff8881d9d8e000 R09: 0000000000000008
R10: fffffbfff0d5dc9c R11: ffffffff86aee4e3 R12: dead000000000200
R13: dead000000000100 R14: ffff8881d3eab830 R15: 00000000ffffffb9
__list_del_entry include/linux/list.h:117 [inline]
list_del include/linux/list.h:125 [inline]
__uwb_rc_neh_rm+0xc5/0x220 drivers/uwb/neh.c:243
uwb_rc_neh_rm+0x30/0x60 drivers/uwb/neh.c:259
uwb_rc_cmd_async+0x29a/0x310 drivers/uwb/reset.c:93
__uwb_rc_cmd+0x10f/0x1e0 drivers/uwb/reset.c:171
uwb_rc_cmd+0xc2/0x130 drivers/uwb/reset.c:220
uwb_rc_reset+0x15e/0x218 drivers/uwb/reset.c:292
uwb_rc_setup+0x84/0x320 drivers/uwb/lc-rc.c:282
uwb_rc_add+0x246/0x42f drivers/uwb/lc-rc.c:351
hwarc_probe+0x3ce/0x980 drivers/uwb/hwa-rc.c:843
usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361
really_probe+0x281/0x660 drivers/base/dd.c:509
driver_probe_device+0x104/0x210 drivers/base/dd.c:670
__device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777
bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454
__device_attach+0x217/0x360 drivers/base/dd.c:843
bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
device_add+0xae6/0x16f0 drivers/base/core.c:2111
usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023
generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210
usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266
really_probe+0x281/0x660 drivers/base/dd.c:509
driver_probe_device+0x104/0x210 drivers/base/dd.c:670
__device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777
bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454
__device_attach+0x217/0x360 drivers/base/dd.c:843
bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
device_add+0xae6/0x16f0 drivers/base/core.c:2111
usb_new_device.cold+0x6a4/0xe61 drivers/usb/core/hub.c:2536
hub_port_connect drivers/usb/core/hub.c:5098 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5213 [inline]
port_event drivers/usb/core/hub.c:5359 [inline]
hub_event+0x1abd/0x3550 drivers/usb/core/hub.c:5441
process_one_work+0x905/0x1570 kernel/workqueue.c:2269
worker_thread+0x96/0xe20 kernel/workqueue.c:2415
kthread+0x30b/0x410 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..
---
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