------------[ cut here ]------------ WARNING: CPU: 1 PID: 10137 at kernel/sched/tune.c:519 schedtune_cancel_attach+0x1c/0x20 kernel/sched/tune.c:519 blk_update_request: 509 callbacks suppressed blk_update_request: I/O error, dev loop0, sector 4864 blk_update_request: I/O error, dev loop0, sector 5119 blk_update_request: I/O error, dev loop0, sector 2240 buffer_io_error: 509 callbacks suppressed Buffer I/O error on dev loop0, logical block 280, lost async page write blk_update_request: I/O error, dev loop0, sector 2232 Buffer I/O error on dev loop0, logical block 279, lost async page write SchedTune cancel attach not implemented[ 128.034051] Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 10137 Comm: syz-executor5 Not tainted 4.9.124-g09eb2ba #83 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d8887640 ffffffff81eb95e9 ffffffff83c48ac0 00000000ffffffff 0000000000000000 0000000000000001 0000000000000207 ffff8801d8887700 ffffffff81423eb5 0000000041b58ab3 ffffffff843bb8e8 ffffffff81423cf6 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bf/0x3bc kernel/panic.c:179 [] __warn.cold.9+0xc1/0x17f kernel/panic.c:542 [] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:565 [] schedtune_cancel_attach+0x1c/0x20 kernel/sched/tune.c:519 [] cgroup_taskset_migrate+0xade/0xea0 kernel/cgroup.c:2597 [] cgroup_update_dfl_csses kernel/cgroup.c:3121 [inline] [] cgroup_apply_control+0x523/0x650 kernel/cgroup.c:3357 [] cgroup_subtree_control_write+0x9d2/0xf40 kernel/cgroup.c:3490 [] cgroup_file_write+0x10d/0x550 kernel/cgroup.c:3517 [] kernfs_fop_write+0x2ae/0x460 fs/kernfs/file.c:316 [] __vfs_write+0x115/0x580 fs/read_write.c:507 [] vfs_write+0x187/0x530 fs/read_write.c:557 [] SYSC_write fs/read_write.c:604 [inline] [] SyS_write+0xd9/0x1c0 fs/read_write.c:596 [] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..