INFO: task syz-executor.1:6073 blocked for more than 143 seconds. Not tainted 5.16.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:26816 pid: 6073 ppid: 3656 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0xa9a/0x4900 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 rwsem_down_read_slowpath+0x589/0xa70 kernel/locking/rwsem.c:1041 __down_read_common kernel/locking/rwsem.c:1223 [inline] __down_read kernel/locking/rwsem.c:1232 [inline] down_read+0xe2/0x440 kernel/locking/rwsem.c:1472 mmap_read_lock include/linux/mmap_lock.h:117 [inline] exit_mm kernel/exit.c:483 [inline] do_exit+0xa0a/0x2b40 kernel/exit.c:819 do_group_exit+0x125/0x310 kernel/exit.c:929 get_signal+0x47d/0x2220 kernel/signal.c:2852 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fc889356e99 RSP: 002b:00007fc887ccc168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007fc889469f60 RCX: 00007fc889356e99 RDX: 0000000020000200 RSI: 0000000000005452 RDI: 0000000000000004 RBP: 00007fc8893b0ff1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc88999db1f R14: 00007fc887ccc300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/u4:1/10: #0: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478 #1: ffff8880b9c279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3a6/0x490 kernel/sched/psi.c:880 1 lock held by khungtaskd/26: #0: ffffffff8bb83da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 2 locks held by getty/3290: #0: ffff88814ab0d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113 1 lock held by syz-executor.1/6072: #0: ffff88807bcb1d28 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline] #0: ffff88807bcb1d28 (&mm->mmap_lock#2){++++}-{3:3}, at: do_mprotect_pkey+0x1e0/0x980 mm/mprotect.c:551 1 lock held by syz-executor.1/6073: #0: ffff88807bcb1d28 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline] #0: ffff88807bcb1d28 (&mm->mmap_lock#2){++++}-{3:3}, at: exit_mm kernel/exit.c:483 [inline] #0: ffff88807bcb1d28 (&mm->mmap_lock#2){++++}-{3:3}, at: do_exit+0xa0a/0x2b40 kernel/exit.c:819 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc7-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:111 nmi_trigger_cpumask_backtrace+0x1b3/0x230 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+0x405/0x4f0 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: 2961 Comm: klogd Not tainted 5.16.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:psi_group_change+0x8f5/0xc20 kernel/sched/psi.c:739 Code: 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 30 48 c1 ea 03 80 3c 02 00 0f 85 ab 01 00 00 48 8b 44 24 08 48 03 2c c5 a0 48 56 8b <48> b8 00 00 00 00 00 fc ff df 48 8d bd 18 0a 00 00 48 89 fa 48 c1 RSP: 0018:ffffc90000007df8 EFLAGS: 00000082 RAX: 0000000000000000 RBX: ffff8880b9c279c0 RCX: 0000000000000006 RDX: 1ffffffff16ac914 RSI: 0000000000000001 RDI: ffff8880b9c279f4 RBP: ffff8880b9c39a80 R08: 0000000000000002 R09: 0000000000000002 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000054 R13: dffffc0000000000 R14: ffffed1017384f3e R15: ffff8880b9c279f0 FS: 00007f01ba2dc800(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0005d4c5c CR3: 00000000221f6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: psi_enqueue kernel/sched/stats.h:131 [inline] enqueue_task kernel/sched/core.c:1995 [inline] activate_task kernel/sched/core.c:2024 [inline] ttwu_do_activate+0x2b4/0x7b0 kernel/sched/core.c:3600 sched_ttwu_pending+0x263/0x550 kernel/sched/core.c:3675 flush_smp_call_function_queue+0x3da/0x640 kernel/smp.c:678 __sysvec_call_function_single+0x95/0x3d0 arch/x86/kernel/smp.c:248 sysvec_call_function_single+0x8e/0xc0 arch/x86/kernel/smp.c:243 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:646 RIP: 0010:finish_task_switch.isra.0+0x323/0xb80 kernel/sched/core.c:4852 Code: 93 5a f3 07 85 c0 75 02 0f 0b 48 85 db 0f 85 25 01 00 00 4c 89 f7 e8 fc f7 ff ff e8 87 3c 2d 00 fb 65 48 8b 1c 25 40 70 02 00 <48> 8d bb 80 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffffc90001acfa98 EFLAGS: 00000206 RAX: 000000000002e571 RBX: ffff88807d529d00 RCX: 1ffffffff1b22571 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90001acfae0 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817dd258 R11: 0000000000000001 R12: ffff8880b9c3a7d8 R13: ffff888010e81d00 R14: ffff8880b9c39a80 R15: ffff8880b9c3a4b8 context_switch kernel/sched/core.c:4975 [inline] __schedule+0xaa2/0x4900 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 syslog_print+0x1c2/0x580 kernel/printk/printk.c:1503 do_syslog.part.0+0x202/0x640 kernel/printk/printk.c:1655 do_syslog kernel/printk/printk.c:1745 [inline] __do_sys_syslog kernel/printk/printk.c:1747 [inline] __se_sys_syslog kernel/printk/printk.c:1745 [inline] __x64_sys_syslog+0x97/0xc0 kernel/printk/printk.c:1745 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: 0033:0x7f01ba4778b7 Code: 73 01 c3 48 8b 0d c1 05 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 67 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 05 0c 00 f7 d8 64 89 01 48 RSP: 002b:00007ffea17ac9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000067 RAX: ffffffffffffffda RBX: 00007f01ba604490 RCX: 00007f01ba4778b7 RDX: 00000000000003ff RSI: 00007f01ba604490 RDI: 0000000000000002 RBP: 0000000000000000 R08: 0000000000000007 R09: 000055ed03a59cf0 R10: 0000000000004000 R11: 0000000000000206 R12: 00007f01ba604490 R13: 00007f01ba6044ab R14: 00007f01ba6044ab R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 7: fc ff df a: 48 8b 54 24 30 mov 0x30(%rsp),%rdx f: 48 c1 ea 03 shr $0x3,%rdx 13: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 17: 0f 85 ab 01 00 00 jne 0x1c8 1d: 48 8b 44 24 08 mov 0x8(%rsp),%rax 22: 48 03 2c c5 a0 48 56 add -0x74a9b760(,%rax,8),%rbp 29: 8b * 2a: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction 31: fc ff df 34: 48 8d bd 18 0a 00 00 lea 0xa18(%rbp),%rdi 3b: 48 89 fa mov %rdi,%rdx 3e: 48 rex.W 3f: c1 .byte 0xc1