INFO: task syz-executor.1:1171 blocked for more than 143 seconds. Not tainted 5.15.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27960 pid: 1171 ppid: 6698 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xb44/0x5960 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 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+0x176/0x280 kernel/sched/completion.c:138 __synchronize_srcu+0x1f4/0x290 kernel/rcu/srcutree.c:930 install_new_memslots+0x312/0x570 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1463 kvm_set_memslot+0xdfe/0x1a40 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1597 __kvm_set_memory_region+0xc1c/0x13d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1755 kvm_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1776 [inline] kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1788 [inline] kvm_vm_ioctl+0x520/0x23d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4363 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 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: 0033:0x7fb8d83b37f7 RSP: 002b:00007fb8d59065f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 00007fb8d83b37f7 RDX: 00007fb8d5906d30 RSI: 000000004020ae46 RDI: 0000000000000004 RBP: 0000000000000004 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000fec00000 R13: 00007fb8d5906d30 R14: 0000000000000011 R15: 0000000020010000 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8b981b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/6259: #0: ffff888071614af0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 3 locks held by kworker/0:14/28453: 1 lock held by syz-executor.1/1171: #0: ffffc90005b390a8 (&kvm->slots_lock){+.+.}-{3:3}, at: kvm_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1775 [inline] #0: ffffc90005b390a8 (&kvm->slots_lock){+.+.}-{3:3}, at: kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1788 [inline] #0: ffffc90005b390a8 (&kvm->slots_lock){+.+.}-{3:3}, at: kvm_vm_ioctl+0x515/0x23d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4363 4 locks held by syz-executor.1/1178: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.0-rc6-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+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 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+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 29677 Comm: kworker/u4:1 Not tainted 5.15.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy7 ieee80211_iface_work RIP: 0010:rcu_read_lock_held_common kernel/rcu/update.c:108 [inline] RIP: 0010:rcu_read_lock_sched_held+0x1c/0x70 kernel/rcu/update.c:123 Code: c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 54 41 bc 01 00 00 00 e8 e3 31 d4 07 85 c0 75 06 44 89 e0 41 5c c3 e8 e4 8c 00 00 <84> c0 74 41 e8 fb 9a 00 00 84 c0 74 38 be ff ff ff ff 48 c7 c7 a0 RSP: 0018:ffffc9000c537a88 EFLAGS: 00000086 RAX: 0000000000000001 RBX: 1ffff920018a6f55 RCX: ffffffff81628e44 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b9d32a08 RBP: 0000000000000001 R08: 0000000000000000 R09: ffff8880b9d32a0b R10: ffffed10173a6541 R11: 0000000000000001 R12: 0000000000000001 R13: 0000000000000000 R14: ffff8880b9c1f9c8 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0036e3d88 CR3: 000000000b68e000 CR4: 00000000003526e0 Call Trace: trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5596 do_write_seqcount_begin_nested include/linux/seqlock.h:520 [inline] do_write_seqcount_begin include/linux/seqlock.h:545 [inline] psi_group_change+0x135/0xc20 kernel/sched/psi.c:703 psi_enqueue kernel/sched/stats.h:82 [inline] enqueue_task kernel/sched/core.c:1972 [inline] activate_task kernel/sched/core.c:2001 [inline] ttwu_do_activate+0x2b4/0x7b0 kernel/sched/core.c:3577 ttwu_queue kernel/sched/core.c:3774 [inline] try_to_wake_up+0x4ff/0x1570 kernel/sched/core.c:4097 wake_up_worker kernel/workqueue.c:855 [inline] process_one_work+0x7dc/0x16b0 kernel/workqueue.c:2260 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: c3 retq 1: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 8: 00 00 00 00 c: 66 90 xchg %ax,%ax e: 41 54 push %r12 10: 41 bc 01 00 00 00 mov $0x1,%r12d 16: e8 e3 31 d4 07 callq 0x7d431fe 1b: 85 c0 test %eax,%eax 1d: 75 06 jne 0x25 1f: 44 89 e0 mov %r12d,%eax 22: 41 5c pop %r12 24: c3 retq 25: e8 e4 8c 00 00 callq 0x8d0e * 2a: 84 c0 test %al,%al <-- trapping instruction 2c: 74 41 je 0x6f 2e: e8 fb 9a 00 00 callq 0x9b2e 33: 84 c0 test %al,%al 35: 74 38 je 0x6f 37: be ff ff ff ff mov $0xffffffff,%esi 3c: 48 rex.W 3d: c7 .byte 0xc7 3e: c7 (bad) 3f: a0 .byte 0xa0