INFO: task syz-executor.0:17202 blocked for more than 143 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28760 17202 7178 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: Bad RIP value. RSP: 002b:00007eff84bb6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007eff84bb76d4 INFO: task syz-executor.2:17212 blocked for more than 143 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28760 17212 7174 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: Bad RIP value. RSP: 002b:00007faa5f210c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007faa5f2116d4 INFO: task syz-executor.4:17214 blocked for more than 143 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28760 17214 7180 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: Bad RIP value. RSP: 002b:00007f5dd9298c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007f5dd92996d4 INFO: task syz-executor.3:17222 blocked for more than 143 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28760 17222 7177 0x00004004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_timeout+0x467/0x6d0 kernel/time/timer.c:1874 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x15e/0x250 kernel/sched/completion.c:138 kthread_stop+0x105/0x590 kernel/kthread.c:572 ubi_detach_mtd_dev+0x1ae/0x3be drivers/mtd/ubi/build.c:1101 ctrl_cdev_ioctl+0x1a1/0x1e0 drivers/mtd/ubi/cdev.c:1068 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007fc729e16c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007fc729e176d4 INFO: task syz-executor.3:17224 blocked for more than 144 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28760 17224 7177 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x10f/0x1e0 drivers/mtd/ubi/cdev.c:1042 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007fc729df5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040186f40 RDI: 0000000000000004 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007fc729df66d4 INFO: task syz-executor.3:17235 blocked for more than 144 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28760 17235 7177 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007fc729dd4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007fc729dd56d4 INFO: task syz-executor.1:17227 blocked for more than 144 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28760 17227 7184 0x00004004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007f682f31bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007f682f31c6d4 INFO: task syz-executor.1:17228 blocked for more than 144 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28760 17228 7184 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x10f/0x1e0 drivers/mtd/ubi/cdev.c:1042 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007f682f2fac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040186f40 RDI: 0000000000000004 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007f682f2fb6d4 INFO: task syz-executor.1:17237 blocked for more than 144 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28760 17237 7184 0x00004004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007f682f2d9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007f682f2da6d4 INFO: task syz-executor.5:17233 blocked for more than 145 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28760 17233 7185 0x00000004 Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x8a0/0x13e0 kernel/locking/mutex.c:1103 ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0xb8/0x110 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x6a/0xb0 fs/ioctl.c:770 do_syscall_64+0xc6/0x620 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 20 0f 94 c0 88 44 24 40 48 8b 6c 24 20 48 83 c4 28 c3 31 c0 eb ee 48 89 34 24 48 89 4c 24 08 48 89 54 24 10 e8 17 5a fa ff <0f> b6 4c 24 18 48 8b 44 24 30 48 8b 5c 24 38 eb bb 31 c9 eb b7 48 RSP: 002b:00007f6cfdef7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000209 R14: 00000000004c44c1 R15: 00007f6cfdef86d4 Showing all locks held in the system: 1 lock held by khungtaskd/1132: #0: ffffffff88db7ac0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x52/0x28d kernel/locking/lockdep.c:5754 1 lock held by syz-executor.0/17202: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.2/17212: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.4/17214: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.3/17222: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.3/17224: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x10f/0x1e0 drivers/mtd/ubi/cdev.c:1042 1 lock held by syz-executor.3/17235: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.1/17227: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.1/17228: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x10f/0x1e0 drivers/mtd/ubi/cdev.c:1042 1 lock held by syz-executor.1/17237: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.5/17233: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 1 lock held by syz-executor.5/17234: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x10f/0x1e0 drivers/mtd/ubi/cdev.c:1042 1 lock held by syz-executor.5/17239: #0: ffffffff8950fbc8 (ubi_devices_mutex){+.+.}-{3:3}, at: ctrl_cdev_ioctl+0x198/0x1e0 drivers/mtd/ubi/cdev.c:1067 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1132 Comm: khungtaskd Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x128/0x182 lib/dump_stack.c:118 nmi_cpu_backtrace.cold.7+0x4b/0x83 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x183/0x1ac lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0x629/0xc70 kernel/hung_task.c:289 kthread+0x340/0x410 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:166 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:184 [inline] RIP: 0010:check_memory_region+0x5e/0x1e0 mm/kasan/generic.c:193 Code: 89 f8 49 b9 00 00 00 00 00 fc ff df 4d 89 d3 49 c1 e8 03 49 c1 eb 03 4d 01 cb 4d 01 c1 49 8d 6b 01 4c 89 c8 48 89 eb 4c 29 cb <48> 83 fb 10 7e 75 45 89 c8 41 83 e0 07 0f 85 a5 00 00 00 4c 8d 43 RSP: 0018:ffffc90000007ad0 EFLAGS: 00000002 RAX: fffffbfff16ab93c RBX: 0000000000000001 RCX: ffffffff81505c7e RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8b55c9e0 RBP: fffffbfff16ab93d R08: 1ffffffff16ab93c R09: fffffbfff16ab93c R10: ffffffff8b55c9e7 R11: fffffbfff16ab93c R12: adeea94cb99a8de4 R13: 0000000000000001 R14: ffffffff89be0a50 R15: ffffffff88c86cf0 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1ecc008070 CR3: 000000009acb3000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] hlock_class+0x4e/0x120 kernel/locking/lockdep.c:179 __lock_acquire+0xcaa/0x3690 kernel/locking/lockdep.c:4352 lock_acquire+0x1e3/0x970 kernel/locking/lockdep.c:4934 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xc0 kernel/locking/spinlock.c:159 debug_object_deactivate+0xf3/0x3b0 lib/debugobjects.c:710 debug_timer_deactivate kernel/time/timer.c:719 [inline] debug_deactivate kernel/time/timer.c:768 [inline] detach_timer kernel/time/timer.c:813 [inline] expire_timers kernel/time/timer.c:1439 [inline] __run_timers kernel/time/timer.c:1774 [inline] run_timer_softirq+0x34e/0x1170 kernel/time/timer.c:1787 __do_softirq+0x26e/0xa0c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x191/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x1a1/0x5f0 arch/x86/kernel/apic/apic.c:1140 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 Code: e9 57 ff ff ff 48 89 df e8 1f 51 72 fa e9 e6 fe ff ff 48 89 df e8 12 51 72 fa eb 9c e9 07 00 00 00 0f 00 2d 84 9e 5d 00 fb f4 90 e9 07 00 00 00 0f 00 2d 74 9e 5d 00 f4 c3 cc cc 41 56 41 55 RSP: 0018:ffffffff88c07d90 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 1ffffffff11a8d3f RSI: 0000000000000006 RDI: ffffffff88d469f8 RBP: fffffbfff11a8d3d R08: fffffbfff1190c81 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff89bdd840 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:144 [inline] default_idle+0x4c/0x340 arch/x86/kernel/process.c:697 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x470/0x680 kernel/sched/idle.c:269 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361 start_kernel+0x6bc/0x6fa init/main.c:1003 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242