bisecting fixing commit since 411a44c24a561e449b592ff631b7ae321f1eb559
building syzkaller on be531bb42381b245eed805e49fd889d1c2118c76
testing commit 411a44c24a561e449b592ff631b7ae321f1eb559
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: d2913c87381820bb8b7bfd4b593fc780a7d929e6e25eda11b7bcf44bbd7a1aeb
run #0: crashed: INFO: task hung in sisusb_open
run #1: crashed: INFO: task hung in usb_register_dev
run #2: crashed: INFO: task hung in usb_register_dev
run #3: crashed: INFO: task hung in usb_register_dev
run #4: crashed: INFO: task hung in usb_register_dev
run #5: crashed: INFO: task hung in sisusb_open
run #6: crashed: INFO: task hung in usb_register_dev
run #7: crashed: INFO: task hung in usb_register_dev
run #8: crashed: INFO: task hung in usb_register_dev
run #9: crashed: INFO: task hung in usb_register_dev
run #10: crashed: INFO: task hung in usb_register_dev
run #11: crashed: INFO: task hung in sisusb_open
run #12: crashed: INFO: task hung in usb_register_dev
run #13: crashed: INFO: task hung in usb_register_dev
run #14: crashed: INFO: task hung in usb_register_dev
run #15: crashed: INFO: task hung in usb_register_dev
run #16: crashed: INFO: task hung in sisusb_open
run #17: crashed: INFO: task hung in sisusb_open
run #18: crashed: INFO: task hung in usb_register_dev
run #19: crashed: INFO: task hung in usb_register_dev
testing current HEAD 3498e7f2bb415e447354a3debef6738d9655768c
testing commit 3498e7f2bb415e447354a3debef6738d9655768c
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: c36d1e3cf066b26105cff2b8b7eebb6552094c9dbc5519b33f6d584caa3f4c4f
run #0: crashed: INFO: task hung in sisusb_open
run #1: crashed: INFO: task hung in sisusb_open
run #2: crashed: INFO: task hung in sisusb_open
run #3: crashed: INFO: task hung in usb_register_dev
run #4: crashed: INFO: task hung in usb_register_dev
run #5: crashed: INFO: task hung in usb_register_dev
run #6: crashed: INFO: task hung in usb_register_dev
run #7: crashed: INFO: task hung in usb_register_dev
run #8: crashed: INFO: task hung in sisusb_open
run #9: crashed: INFO: task hung in usb_register_dev
revisions tested: 2, total time: 29m50.879163878s (build: 12m58.400101848s, test: 16m19.069369944s)
the crash still happens on HEAD
commit msg: Merge tag '5.16-rc2-ksmbd-fixes' of git://git.samba.org/ksmbd
crash: INFO: task hung in usb_register_dev
INFO: task kworker/1:1:25 blocked for more than 143 seconds.
Not tainted 5.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:1 state:D stack:25360 pid: 25 ppid: 2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_write_slowpath+0x761/0x1130 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1272 [inline]
__down_write_common kernel/locking/rwsem.c:1269 [inline]
__down_write kernel/locking/rwsem.c:1281 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1528
usb_register_dev drivers/usb/core/file.c:187 [inline]
usb_register_dev+0x12e/0x700 drivers/usb/core/file.c:156
sisusb_probe+0x20e/0xade drivers/usb/misc/sisusbvga/sisusb.c:3038
usb_probe_interface+0x274/0x6a0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:517 [inline]
really_probe+0x1c2/0xb60 drivers/base/dd.c:596
__driver_probe_device+0x2a6/0x460 drivers/base/dd.c:751
driver_probe_device+0x44/0x110 drivers/base/dd.c:781
__device_attach_driver+0x185/0x250 drivers/base/dd.c:898
bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:427
__device_attach+0x1db/0x410 drivers/base/dd.c:969
bus_probe_device+0x19d/0x250 drivers/base/bus.c:487
device_add+0xa57/0x1b80 drivers/base/core.c:3394
usb_set_configuration+0xa66/0x18b0 drivers/usb/core/message.c:2170
usb_generic_driver_probe+0x74/0xa0 drivers/usb/core/generic.c:238
usb_probe_device+0x95/0x240 drivers/usb/core/driver.c:293
call_driver_probe drivers/base/dd.c:517 [inline]
really_probe+0x1c2/0xb60 drivers/base/dd.c:596
__driver_probe_device+0x2a6/0x460 drivers/base/dd.c:751
driver_probe_device+0x44/0x110 drivers/base/dd.c:781
__device_attach_driver+0x185/0x250 drivers/base/dd.c:898
bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:427
__device_attach+0x1db/0x410 drivers/base/dd.c:969
bus_probe_device+0x19d/0x250 drivers/base/bus.c:487
device_add+0xa57/0x1b80 drivers/base/core.c:3394
usb_new_device.cold+0x5cf/0xee8 drivers/usb/core/hub.c:2563
hub_port_connect drivers/usb/core/hub.c:5353 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5497 [inline]
port_event drivers/usb/core/hub.c:5643 [inline]
hub_event+0x111f/0x3830 drivers/usb/core/hub.c:5725
process_one_work+0x87f/0x1450 kernel/workqueue.c:2298
worker_thread+0x598/0x1040 kernel/workqueue.c:2445
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/1:3:2966 blocked for more than 143 seconds.
Not tainted 5.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:3 state:D stack:24920 pid: 2966 ppid: 2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_write_slowpath+0x761/0x1130 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1272 [inline]
__down_write_common kernel/locking/rwsem.c:1269 [inline]
__down_write kernel/locking/rwsem.c:1281 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1528
usb_register_dev drivers/usb/core/file.c:187 [inline]
usb_register_dev+0x12e/0x700 drivers/usb/core/file.c:156
sisusb_probe+0x20e/0xade drivers/usb/misc/sisusbvga/sisusb.c:3038
usb_probe_interface+0x274/0x6a0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:517 [inline]
really_probe+0x1c2/0xb60 drivers/base/dd.c:596
__driver_probe_device+0x2a6/0x460 drivers/base/dd.c:751
driver_probe_device+0x44/0x110 drivers/base/dd.c:781
__device_attach_driver+0x185/0x250 drivers/base/dd.c:898
bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:427
__device_attach+0x1db/0x410 drivers/base/dd.c:969
bus_probe_device+0x19d/0x250 drivers/base/bus.c:487
device_add+0xa57/0x1b80 drivers/base/core.c:3394
usb_set_configuration+0xa66/0x18b0 drivers/usb/core/message.c:2170
usb_generic_driver_probe+0x74/0xa0 drivers/usb/core/generic.c:238
usb_probe_device+0x95/0x240 drivers/usb/core/driver.c:293
call_driver_probe drivers/base/dd.c:517 [inline]
really_probe+0x1c2/0xb60 drivers/base/dd.c:596
__driver_probe_device+0x2a6/0x460 drivers/base/dd.c:751
driver_probe_device+0x44/0x110 drivers/base/dd.c:781
__device_attach_driver+0x185/0x250 drivers/base/dd.c:898
bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:427
__device_attach+0x1db/0x410 drivers/base/dd.c:969
bus_probe_device+0x19d/0x250 drivers/base/bus.c:487
device_add+0xa57/0x1b80 drivers/base/core.c:3394
usb_new_device.cold+0x5cf/0xee8 drivers/usb/core/hub.c:2563
hub_port_connect drivers/usb/core/hub.c:5353 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5497 [inline]
port_event drivers/usb/core/hub.c:5643 [inline]
hub_event+0x111f/0x3830 drivers/usb/core/hub.c:5725
process_one_work+0x87f/0x1450 kernel/workqueue.c:2298
worker_thread+0x598/0x1040 kernel/workqueue.c:2445
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/1:5:8706 blocked for more than 144 seconds.
Not tainted 5.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:5 state:D stack:25608 pid: 8706 ppid: 2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_write_slowpath+0x761/0x1130 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1272 [inline]
__down_write_common kernel/locking/rwsem.c:1269 [inline]
__down_write kernel/locking/rwsem.c:1281 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1528
usb_register_dev drivers/usb/core/file.c:187 [inline]
usb_register_dev+0x12e/0x700 drivers/usb/core/file.c:156
sisusb_probe+0x20e/0xade drivers/usb/misc/sisusbvga/sisusb.c:3038
usb_probe_interface+0x274/0x6a0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:517 [inline]
really_probe+0x1c2/0xb60 drivers/base/dd.c:596
__driver_probe_device+0x2a6/0x460 drivers/base/dd.c:751
driver_probe_device+0x44/0x110 drivers/base/dd.c:781
__device_attach_driver+0x185/0x250 drivers/base/dd.c:898
bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:427
__device_attach+0x1db/0x410 drivers/base/dd.c:969
bus_probe_device+0x19d/0x250 drivers/base/bus.c:487
device_add+0xa57/0x1b80 drivers/base/core.c:3394
usb_set_configuration+0xa66/0x18b0 drivers/usb/core/message.c:2170
usb_generic_driver_probe+0x74/0xa0 drivers/usb/core/generic.c:238
usb_probe_device+0x95/0x240 drivers/usb/core/driver.c:293
call_driver_probe drivers/base/dd.c:517 [inline]
really_probe+0x1c2/0xb60 drivers/base/dd.c:596
__driver_probe_device+0x2a6/0x460 drivers/base/dd.c:751
driver_probe_device+0x44/0x110 drivers/base/dd.c:781
__device_attach_driver+0x185/0x250 drivers/base/dd.c:898
bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:427
__device_attach+0x1db/0x410 drivers/base/dd.c:969
bus_probe_device+0x19d/0x250 drivers/base/bus.c:487
device_add+0xa57/0x1b80 drivers/base/core.c:3394
usb_new_device.cold+0x5cf/0xee8 drivers/usb/core/hub.c:2563
hub_port_connect drivers/usb/core/hub.c:5353 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5497 [inline]
port_event drivers/usb/core/hub.c:5643 [inline]
hub_event+0x111f/0x3830 drivers/usb/core/hub.c:5725
process_one_work+0x87f/0x1450 kernel/workqueue.c:2298
worker_thread+0x598/0x1040 kernel/workqueue.c:2445
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/1:6:8817 blocked for more than 144 seconds.
Not tainted 5.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:6 state:D stack:25608 pid: 8817 ppid: 2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_write_slowpath+0x761/0x1130 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1272 [inline]
__down_write_common kernel/locking/rwsem.c:1269 [inline]
__down_write kernel/locking/rwsem.c:1281 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1528
usb_register_dev drivers/usb/core/file.c:187 [inline]
usb_register_dev+0x12e/0x700 drivers/usb/core/file.c:156
sisusb_probe+0x20e/0xade drivers/usb/misc/sisusbvga/sisusb.c:3038
usb_probe_interface+0x274/0x6a0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:517 [inline]
really_probe+0x1c2/0xb60 drivers/base/dd.c:596
__driver_probe_device+0x2a6/0x460 drivers/base/dd.c:751
driver_probe_device+0x44/0x110 drivers/base/dd.c:781
__device_attach_driver+0x185/0x250 drivers/base/dd.c:898
bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:427
__device_attach+0x1db/0x410 drivers/base/dd.c:969
bus_probe_device+0x19d/0x250 drivers/base/bus.c:487
device_add+0xa57/0x1b80 drivers/base/core.c:3394
usb_set_configuration+0xa66/0x18b0 drivers/usb/core/message.c:2170
usb_generic_driver_probe+0x74/0xa0 drivers/usb/core/generic.c:238
usb_probe_device+0x95/0x240 drivers/usb/core/driver.c:293
call_driver_probe drivers/base/dd.c:517 [inline]
really_probe+0x1c2/0xb60 drivers/base/dd.c:596
__driver_probe_device+0x2a6/0x460 drivers/base/dd.c:751
driver_probe_device+0x44/0x110 drivers/base/dd.c:781
__device_attach_driver+0x185/0x250 drivers/base/dd.c:898
bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:427
__device_attach+0x1db/0x410 drivers/base/dd.c:969
bus_probe_device+0x19d/0x250 drivers/base/bus.c:487
device_add+0xa57/0x1b80 drivers/base/core.c:3394
usb_new_device.cold+0x5cf/0xee8 drivers/usb/core/hub.c:2563
hub_port_connect drivers/usb/core/hub.c:5353 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5497 [inline]
port_event drivers/usb/core/hub.c:5643 [inline]
hub_event+0x111f/0x3830 drivers/usb/core/hub.c:5725
process_one_work+0x87f/0x1450 kernel/workqueue.c:2298
worker_thread+0x598/0x1040 kernel/workqueue.c:2445
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz-executor.5:10468 blocked for more than 145 seconds.
Not tainted 5.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:28536 pid:10468 ppid: 7053 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_read_slowpath+0x4c5/0x990 kernel/locking/rwsem.c:996
__down_read_common kernel/locking/rwsem.c:1224 [inline]
__down_read kernel/locking/rwsem.c:1233 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1476
usb_open+0x1f/0x2a0 drivers/usb/core/file.c:39
chrdev_open+0x20f/0x650 fs/char_dev.c:414
do_dentry_open+0x429/0x1040 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x9ea/0x2250 fs/namei.c:3559
do_filp_open+0x199/0x3d0 fs/namei.c:3586
do_sys_openat2+0x11e/0x400 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_openat fs/open.c:1244 [inline]
__se_sys_openat fs/open.c:1239 [inline]
__x64_sys_openat+0x11b/0x1d0 fs/open.c:1239
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fdea7eed954
RSP: 002b:00007fdea76afcc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fdea804df60 RCX: 00007fdea7eed954
RDX: 0000000000000002 RSI: 00007fdea76afd60 RDI: 00000000ffffff9c
RBP: 00007fdea76afd60 R08: 0000000000000000 R09: 000000000000000f
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffc2376e05f R14: 00007fdea76b0300 R15: 0000000000022000
INFO: task syz-executor.1:10464 blocked for more than 145 seconds.
Not tainted 5.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27832 pid:10464 ppid: 7060 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_read_slowpath+0x4c5/0x990 kernel/locking/rwsem.c:996
__down_read_common kernel/locking/rwsem.c:1224 [inline]
__down_read kernel/locking/rwsem.c:1233 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1476
usb_open+0x1f/0x2a0 drivers/usb/core/file.c:39
chrdev_open+0x20f/0x650 fs/char_dev.c:414
do_dentry_open+0x429/0x1040 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x9ea/0x2250 fs/namei.c:3559
do_filp_open+0x199/0x3d0 fs/namei.c:3586
do_sys_openat2+0x11e/0x400 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_openat fs/open.c:1244 [inline]
__se_sys_openat fs/open.c:1239 [inline]
__x64_sys_openat+0x11b/0x1d0 fs/open.c:1239
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f38146b6954
RSP: 002b:00007f3813e78cc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f3814816f60 RCX: 00007f38146b6954
RDX: 0000000000000002 RSI: 00007f3813e78d60 RDI: 00000000ffffff9c
RBP: 00007f3813e78d60 R08: 0000000000000000 R09: 000000000000000f
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffc011dcbaf R14: 00007f3813e79300 R15: 0000000000022000
INFO: task syz-executor.4:10474 blocked for more than 145 seconds.
Not tainted 5.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28488 pid:10474 ppid: 7059 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_read_slowpath+0x4c5/0x990 kernel/locking/rwsem.c:996
__down_read_common kernel/locking/rwsem.c:1224 [inline]
__down_read kernel/locking/rwsem.c:1233 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1476
usb_open+0x1f/0x2a0 drivers/usb/core/file.c:39
chrdev_open+0x20f/0x650 fs/char_dev.c:414
do_dentry_open+0x429/0x1040 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x9ea/0x2250 fs/namei.c:3559
do_filp_open+0x199/0x3d0 fs/namei.c:3586
do_sys_openat2+0x11e/0x400 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_openat fs/open.c:1244 [inline]
__se_sys_openat fs/open.c:1239 [inline]
__x64_sys_openat+0x11b/0x1d0 fs/open.c:1239
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fcb5fcc8954
RSP: 002b:00007fcb5f48acc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fcb5fe28f60 RCX: 00007fcb5fcc8954
RDX: 0000000000000002 RSI: 00007fcb5f48ad60 RDI: 00000000ffffff9c
RBP: 00007fcb5f48ad60 R08: 0000000000000000 R09: 000000000000000f
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffdac842aaf R14: 00007fcb5f48b300 R15: 0000000000022000
INFO: task syz-executor.2:10478 blocked for more than 146 seconds.
Not tainted 5.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28344 pid:10478 ppid: 7057 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa5a/0x48f0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_read_slowpath+0x4c5/0x990 kernel/locking/rwsem.c:996
__down_read_common kernel/locking/rwsem.c:1224 [inline]
__down_read kernel/locking/rwsem.c:1233 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1476
usb_open+0x1f/0x2a0 drivers/usb/core/file.c:39
chrdev_open+0x20f/0x650 fs/char_dev.c:414
do_dentry_open+0x429/0x1040 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x9ea/0x2250 fs/namei.c:3559
do_filp_open+0x199/0x3d0 fs/namei.c:3586
do_sys_openat2+0x11e/0x400 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_openat fs/open.c:1244 [inline]
__se_sys_openat fs/open.c:1239 [inline]
__x64_sys_openat+0x11b/0x1d0 fs/open.c:1239
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9753168954
RSP: 002b:00007f975292acc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f97532c8f60 RCX: 00007f9753168954
RDX: 0000000000000002 RSI: 00007f975292ad60 RDI: 00000000ffffff9c
RBP: 00007f975292ad60 R08: 0000000000000000 R09: 000000000000000f
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffef81aee2f R14: 00007f975292b300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by ksoftirqd/1/19:
#0: ffff8880b9f39a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
6 locks held by kworker/1:1/25:
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2269
#1: ffffc90000dffdb8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2273
#2: ffff888147c47220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#2: ffff888147c47220 (&dev->mutex){....}-{3:3}, at: hub_event+0x127/0x3830 drivers/usb/core/hub.c:5671
#3: ffff88807a349220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#3: ffff88807a349220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x74/0x410 drivers/base/dd.c:944
#4: ffff88807a9511a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#4: ffff88807a9511a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x74/0x410 drivers/base/dd.c:944
#5: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#5: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_register_dev+0x12e/0x700 drivers/usb/core/file.c:156
1 lock held by khungtaskd/27:
#0: ffffffff8ab7a440 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
6 locks held by kworker/1:3/2966:
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2269
#1: ffffc9000c7a7db8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2273
#2: ffff88801c307220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#2: ffff88801c307220 (&dev->mutex){....}-{3:3}, at: hub_event+0x127/0x3830 drivers/usb/core/hub.c:5671
#3: ffff88807b45b220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#3: ffff88807b45b220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x74/0x410 drivers/base/dd.c:944
#4: ffff88806ea5f1a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#4: ffff88806ea5f1a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x74/0x410 drivers/base/dd.c:944
#5: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#5: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_register_dev+0x12e/0x700 drivers/usb/core/file.c:156
1 lock held by in:imklog/6277:
#0: ffff888017cc0af0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x9c/0xb0 fs/file.c:990
6 locks held by kworker/0:3/6887:
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2269
#1: ffffc90002f9fdb8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2273
#2: ffff888147bd2220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#2: ffff888147bd2220 (&dev->mutex){....}-{3:3}, at: hub_event+0x127/0x3830 drivers/usb/core/hub.c:5671
#3: ffff888010dcb220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#3: ffff888010dcb220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x74/0x410 drivers/base/dd.c:944
#4: ffff88807c1811a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#4: ffff88807c1811a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x74/0x410 drivers/base/dd.c:944
#5: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#5: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_register_dev+0x12e/0x700 drivers/usb/core/file.c:156
2 locks held by kworker/u4:6/7775:
6 locks held by kworker/0:5/8674:
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2269
#1: ffffc9000adffdb8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2273
#2: ffff888147c1f220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#2: ffff888147c1f220 (&dev->mutex){....}-{3:3}, at: hub_event+0x127/0x3830 drivers/usb/core/hub.c:5671
#3: ffff88801eaa6220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#3: ffff88801eaa6220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x74/0x410 drivers/base/dd.c:944
#4: ffff8880784e71a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#4: ffff8880784e71a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x74/0x410 drivers/base/dd.c:944
#5: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#5: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_register_dev+0x12e/0x700 drivers/usb/core/file.c:156
6 locks held by kworker/1:5/8706:
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2269
#1: ffffc9000b1efdb8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2273
#2: ffff888147c37220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#2: ffff888147c37220 (&dev->mutex){....}-{3:3}, at: hub_event+0x127/0x3830 drivers/usb/core/hub.c:5671
#3: ffff88814afbc220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#3: ffff88814afbc220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x74/0x410 drivers/base/dd.c:944
#4: ffff88807b25b1a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#4: ffff88807b25b1a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x74/0x410 drivers/base/dd.c:944
#5: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#5: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_register_dev+0x12e/0x700 drivers/usb/core/file.c:156
6 locks held by kworker/1:6/8817:
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff8881417c3138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x7a4/0x1450 kernel/workqueue.c:2269
#1: ffffc9000b4ffdb8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d1/0x1450 kernel/workqueue.c:2273
#2: ffff888147be8220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#2: ffff888147be8220 (&dev->mutex){....}-{3:3}, at: hub_event+0x127/0x3830 drivers/usb/core/hub.c:5671
#3: ffff88807bd94220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#3: ffff88807bd94220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x74/0x410 drivers/base/dd.c:944
#4: ffff8880777751a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#4: ffff8880777751a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x74/0x410 drivers/base/dd.c:944
#5: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#5: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_register_dev+0x12e/0x700 drivers/usb/core/file.c:156
2 locks held by syz-executor.3/10440:
#0: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x1f/0x2a0 drivers/usb/core/file.c:39
#1: ffff88807c41c8d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xa0/0x3e0 drivers/usb/misc/sisusbvga/sisusb.c:2396
1 lock held by syz-executor.5/10468:
#0: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x1f/0x2a0 drivers/usb/core/file.c:39
1 lock held by syz-executor.1/10464:
#0: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x1f/0x2a0 drivers/usb/core/file.c:39
1 lock held by syz-executor.4/10474:
#0: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x1f/0x2a0 drivers/usb/core/file.c:39
1 lock held by syz-executor.2/10478:
#0: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x1f/0x2a0 drivers/usb/core/file.c:39
1 lock held by syz-executor.0/10867:
#0: ffffffff8b9d4cb0 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x1f/0x2a0 drivers/usb/core/file.c:39
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0x88c/0xbf0 kernel/hung_task.c:295
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2986 Comm: systemd-journal Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__exit_to_user_mode kernel/entry/common.c:132 [inline]
RIP: 0010:syscall_exit_to_user_mode+0x33/0x60 kernel/entry/common.c:302
Code: 9c 58 fa f6 c4 02 75 39 48 89 ef e8 f7 06 e4 f8 e8 c2 08 f9 f8 48 8b 7c 24 08 e8 58 c0 db f8 eb 14 66 90 0f 00 2d 4d e4 54 00 <48> 8b 7c 24 08 5d e9 c2 f3 ff ff bf 01 00 00 00 e8 78 02 00 00 eb
RSP: 0018:ffffc90001b0ff30 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90001b0fe88
RDX: 1ffff1100f670484 RSI: ffffffff88d40080 RDI: ffffffff89214ba0
RBP: ffffc90001b0ff58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffc90001b0ff58
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007feec2b2b8c0(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feebfff5000 CR3: 000000001c241000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7feec1de6687
Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffc3337ad48 EFLAGS: 00000293 ORIG_RAX: 0000000000000053
RAX: fffffffffffffffe RBX: 00007ffc3337ddb0 RCX: 00007feec1de6687
RDX: 0000000000000000 RSI: 00000000000001ed RDI: 000055a08f3278a0
RBP: 00007ffc3337ad80 R08: 000055a08e43e3e5 R09: 0000000000000018
R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 000055a08f3278a0 R15: 00007ffc3337b3c0
----------------
Code disassembly (best guess):
0: 9c pushfq
1: 58 pop %rax
2: fa cli
3: f6 c4 02 test $0x2,%ah
6: 75 39 jne 0x41
8: 48 89 ef mov %rbp,%rdi
b: e8 f7 06 e4 f8 callq 0xf8e40707
10: e8 c2 08 f9 f8 callq 0xf8f908d7
15: 48 8b 7c 24 08 mov 0x8(%rsp),%rdi
1a: e8 58 c0 db f8 callq 0xf8dbc077
1f: eb 14 jmp 0x35
21: 66 90 xchg %ax,%ax
23: 0f 00 2d 4d e4 54 00 verw 0x54e44d(%rip) # 0x54e477
* 2a: 48 8b 7c 24 08 mov 0x8(%rsp),%rdi <-- trapping instruction
2f: 5d pop %rbp
30: e9 c2 f3 ff ff jmpq 0xfffff3f7
35: bf 01 00 00 00 mov $0x1,%edi
3a: e8 78 02 00 00 callq 0x2b7
3f: eb .byte 0xeb