INFO: task syz-executor:4797 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:0 pid:4797 tgid:4797 ppid:4796 task_flags:0x400140 flags:0x00800000
Call trace:
__switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T)
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x1b74/0x2d24 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xa4/0x140 kernel/sched/core.c:7282
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7339
__mutex_lock_common+0x98c/0x20f4 kernel/locking/mutex.c:726
__mutex_lock kernel/locking/mutex.c:820 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:873
device_lock include/linux/device.h:1040 [inline]
device_del+0xa0/0x710 drivers/base/core.c:3857
device_unregister+0x2c/0xf0 drivers/base/core.c:3936
nsim_bus_dev_del+0x60/0x88 drivers/net/netdevsim/bus.c:491
del_device_store+0x248/0x2d0 drivers/net/netdevsim/bus.c:244
bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:142
kernfs_fop_write_iter+0x264/0x3c0 fs/kernfs/file.c:352
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x52c/0xa14 fs/read_write.c:688
ksys_write+0x12c/0x224 fs/read_write.c:740
__do_sys_write fs/read_write.c:751 [inline]
__se_sys_write fs/read_write.c:748 [inline]
__arm64_sys_write+0x7c/0x90 fs/read_write.c:748
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723
el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
INFO: task syz-executor:4805 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:0 pid:4805 tgid:4805 ppid:4801 task_flags:0x400140 flags:0x00800000
Call trace:
__switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T)
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x1b74/0x2d24 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xa4/0x140 kernel/sched/core.c:7282
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7339
__mutex_lock_common+0x98c/0x20f4 kernel/locking/mutex.c:726
__mutex_lock kernel/locking/mutex.c:820 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:873
del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:142
kernfs_fop_write_iter+0x264/0x3c0 fs/kernfs/file.c:352
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x52c/0xa14 fs/read_write.c:688
ksys_write+0x12c/0x224 fs/read_write.c:740
__do_sys_write fs/read_write.c:751 [inline]
__se_sys_write fs/read_write.c:748 [inline]
__arm64_sys_write+0x7c/0x90 fs/read_write.c:748
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723
el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
INFO: task syz-executor:4809 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:0 pid:4809 tgid:4809 ppid:1 task_flags:0x400140 flags:0x00800001
Call trace:
__switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T)
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x1b74/0x2d24 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xa4/0x140 kernel/sched/core.c:7282
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7339
__mutex_lock_common+0x98c/0x20f4 kernel/locking/mutex.c:726
__mutex_lock kernel/locking/mutex.c:820 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:873
del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:142
kernfs_fop_write_iter+0x264/0x3c0 fs/kernfs/file.c:352
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x52c/0xa14 fs/read_write.c:688
ksys_write+0x12c/0x224 fs/read_write.c:740
__do_sys_write fs/read_write.c:751 [inline]
__se_sys_write fs/read_write.c:748 [inline]
__arm64_sys_write+0x7c/0x90 fs/read_write.c:748
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723
el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
INFO: task syz-executor:4812 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:0 pid:4812 tgid:4812 ppid:1 task_flags:0x400140 flags:0x00800001
Call trace:
__switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T)
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x1b74/0x2d24 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xa4/0x140 kernel/sched/core.c:7282
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7339
__mutex_lock_common+0x98c/0x20f4 kernel/locking/mutex.c:726
__mutex_lock kernel/locking/mutex.c:820 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:873
del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:142
kernfs_fop_write_iter+0x264/0x3c0 fs/kernfs/file.c:352
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x52c/0xa14 fs/read_write.c:688
ksys_write+0x12c/0x224 fs/read_write.c:740
__do_sys_write fs/read_write.c:751 [inline]
__se_sys_write fs/read_write.c:748 [inline]
__arm64_sys_write+0x7c/0x90 fs/read_write.c:748
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723
el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
Showing all locks held in the system:
3 locks held by kworker/u8:0/12:
1 lock held by khungtaskd/31:
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: __ll_sc_atomic64_fetch_or arch/arm64/include/asm/atomic_ll_sc.h:-1 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: arch_atomic64_fetch_or arch/arm64/include/asm/atomic.h:86 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: raw_atomic64_fetch_or include/linux/atomic/atomic-arch-fallback.h:3816 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: raw_atomic_long_fetch_or include/linux/atomic/atomic-long.h:1090 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: arch_test_and_set_bit include/asm-generic/bitops/atomic.h:42 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:72 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x0/0x44 kernel/sched/sched.h:3869
8 locks held by kworker/u8:3/40:
4 locks held by pr/ttyAMA-1/41:
3 locks held by kworker/u8:5/1188:
3 locks held by kworker/u8:6/1389:
3 locks held by kworker/u8:7/1910:
1 lock held by klogd/4292:
3 locks held by udevd/4303:
3 locks held by dhcpcd/4359:
2 locks held by getty/4451:
#0: ffff0000d3bfb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
#1: ffff80009228b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x354/0xf84 drivers/tty/n_tty.c:2211
3 locks held by kworker/1:3/4670:
#0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x640/0x173c kernel/workqueue.c:3276
#1: ffff8000966d7be0 (reg_work){+.+.}-{0:0}, at: process_one_work+0x6a4/0x173c kernel/workqueue.c:3276
#2: ffff800089b85900 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
5 locks held by syz-executor/4797:
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2724 [inline]
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x240/0xa14 fs/read_write.c:684
#1: ffff0000e8fb8880 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b4/0x3c0 fs/kernfs/file.c:343
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f4/0x3c0 fs/kernfs/file.c:344
#3: ffff800089383240 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
#4: ffff0000d7b8a128 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1040 [inline]
#4: ffff0000d7b8a128 (&dev->mutex){....}-{4:4}, at: device_del+0xa0/0x710 drivers/base/core.c:3857
4 locks held by syz-executor/4805:
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2724 [inline]
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x240/0xa14 fs/read_write.c:684
#1: ffff0000eca42080 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b4/0x3c0 fs/kernfs/file.c:343
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f4/0x3c0 fs/kernfs/file.c:344
#3: ffff800089383240 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
4 locks held by syz-executor/4809:
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2724 [inline]
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x240/0xa14 fs/read_write.c:684
#1: ffff0000eca0f880 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b4/0x3c0 fs/kernfs/file.c:343
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f4/0x3c0 fs/kernfs/file.c:344
#3: ffff800089383240 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
4 locks held by syz-executor/4812:
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2724 [inline]
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x240/0xa14 fs/read_write.c:684
#1: ffff0000cd063c80 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b4/0x3c0 fs/kernfs/file.c:343
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f4/0x3c0 fs/kernfs/file.c:344
#3: ffff800089383240 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
3 locks held by kworker/u8:11/4904:
#0: ffff0000ce706140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x640/0x173c kernel/workqueue.c:3276
#1: ffff8000995f7be0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6a4/0x173c kernel/workqueue.c:3276
#2: ffff800089b85900 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
2 locks held by kworker/u8:12/4906:
2 locks held by kworker/u8:13/4908:
2 locks held by syz-executor/4913:
2 locks held by syz-executor/4914:
=============================================