INFO: task syz-executor.0:24127 blocked for more than 140 seconds. Not tainted 4.19.111-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28416 24127 8019 0x80000004 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3559 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x21b/0x3c0 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x45/0xb0 kernel/locking/rwsem.c:26 exit_mm kernel/exit.c:512 [inline] do_exit+0x6f7/0x2f30 kernel/exit.c:867 do_group_exit+0x125/0x350 kernel/exit.c:983 get_signal+0x3ec/0x1f90 kernel/signal.c:2583 do_signal+0x8f/0x1710 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x22b/0x2b0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c89a Code: Bad RIP value. RSP: 002b:00007ffeec532838 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 000000000045c89a RDX: 0000000000000003 RSI: 0000000000021000 RDI: 0000000000000000 RBP: ffffffffffffffff R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000020022 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000021000 R14: 0000000000020022 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1079: #0: 0000000091bdf12c (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4436 1 lock held by rsyslogd/7856: #0: 00000000e1f3b97a (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 fs/file.c:767 2 locks held by getty/7979: #0: 00000000ae6d343d (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000872ac15f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/7980: #0: 000000003aa9e5df (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000581f4d90 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/7981: #0: 00000000b69e20bd (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000007c0ff9ec (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/7982: #0: 00000000045687c7 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000fc963ae1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/7983: #0: 000000002173414c (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000007c483de7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/7984: #0: 00000000bcbbef18 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000724a6fdd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/7985: #0: 00000000d4fa429f (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000b0fb9ad9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by kworker/u4:1/1398: 1 lock held by syz-executor.0/24127: #0: 00000000db2be8aa (&mm->mmap_sem){++++}, at: exit_mm kernel/exit.c:512 [inline] #0: 00000000db2be8aa (&mm->mmap_sem){++++}, at: do_exit+0x6f7/0x2f30 kernel/exit.c:867 4 locks held by syz-executor.0/24128: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1079 Comm: khungtaskd Not tainted 4.19.111-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+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x962/0xe40 kernel/hung_task.c:287 kthread+0x34a/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 24128 Comm: syz-executor.0 Not tainted 4.19.111-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:atomic_inc include/asm-generic/atomic-instrumented.h:109 [inline] RIP: 0010:__lock_acquire+0x221/0x49c0 kernel/locking/lockdep.c:3303 Code: 8d 7c c7 08 48 89 f9 48 c1 e9 03 80 3c 11 00 0f 85 b4 32 00 00 49 8b 44 c7 08 48 85 c0 0f 84 28 ff ff ff 48 8d b8 38 01 00 00 04 00 00 00 44 89 84 24 80 00 00 00 48 89 84 24 88 00 00 00 e8 RSP: 0018:ffff8880ae607460 EFLAGS: 00000082 RAX: ffffffff8b1f1180 RBX: 0000000000000000 RCX: 1ffffffff117253d RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff8b1f12b8 RBP: ffff8880ae607630 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000001 R14: ffff88808d58e100 R15: ffffffff88b929e0 FS: 00007fe3cc799700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000045c870 CR3: 000000004925b000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x400 kernel/locking/lockdep.c:3903 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] __perf_output_begin kernel/events/ring_buffer.c:156 [inline] perf_output_begin_forward+0xd9/0xb00 kernel/events/ring_buffer.c:262 __perf_event_output kernel/events/core.c:6584 [inline] perf_event_output_forward+0x108/0x270 kernel/events/core.c:6600 __perf_event_overflow+0x13c/0x370 kernel/events/core.c:7866 perf_swevent_hrtimer+0x26d/0x3d0 kernel/events/core.c:9222 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x2fc/0xd50 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_release+0x42b/0x820 kernel/locking/lockdep.c:3925 Code: 7c 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 e4 02 00 00 48 83 3d 99 ab 62 07 00 0f 84 36 02 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 c7 04 03 00 00 00 RSP: 0018:ffff8880133e7118 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1164ad1 RBX: 1ffff1100267ce27 RCX: 1ffff11011ab1d2e RDX: dffffc0000000000 RSI: 0000000000000003 RDI: 0000000000000286 RBP: ffff88808d58e100 R08: 0000000000000000 R09: 0000000000000002 R10: ffffed1015cc4732 R11: ffff8880ae623993 R12: ffffffff81a1f672 R13: 0000000000000003 R14: ffff88808d58e100 R15: 0000000000000003 get_mem_cgroup_from_mm mm/memcontrol.c:857 [inline] get_mem_cgroup_from_mm+0x179/0x4f0 mm/memcontrol.c:835 mem_cgroup_try_charge+0x234/0x5c0 mm/memcontrol.c:5991 __add_to_page_cache_locked+0x2eb/0xc50 mm/filemap.c:862 add_to_page_cache_lru+0x19d/0x810 mm/filemap.c:928 mpage_readpages+0x30a/0x670 fs/mpage.c:399 read_pages+0x101/0x610 mm/readahead.c:123 __do_page_cache_readahead+0x5bc/0x6b0 mm/readahead.c:211 ra_submit mm/internal.h:66 [inline] do_sync_mmap_readahead mm/filemap.c:2467 [inline] filemap_fault+0x9ed/0x1d20 mm/filemap.c:2543 __do_fault+0x10d/0x470 mm/memory.c:3269 do_shared_fault mm/memory.c:3736 [inline] do_fault mm/memory.c:3814 [inline] handle_pte_fault mm/memory.c:4041 [inline] __handle_mm_fault+0x28cb/0x3b60 mm/memory.c:4165 handle_mm_fault+0x1a5/0x670 mm/memory.c:4202 faultin_page mm/gup.c:530 [inline] __get_user_pages+0x599/0x1650 mm/gup.c:730 __get_user_pages_locked mm/gup.c:901 [inline] get_user_pages+0x93/0xc0 mm/gup.c:1110 xdp_umem_pin_pages net/xdp/xdp_umem.c:212 [inline] xdp_umem_reg net/xdp/xdp_umem.c:319 [inline] xdp_umem_create+0x577/0xda0 net/xdp/xdp_umem.c:350 xsk_setsockopt+0x364/0x440 net/xdp/xsk.c:529 __sys_setsockopt+0x14d/0x240 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:1909 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c849 Code: Bad RIP value. RSP: 002b:00007fe3cc798c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fe3cc7996d4 RCX: 000000000045c849 RDX: 0000000000000004 RSI: 000000000000011b RDI: 0000000000000007 RBP: 000000000076bf00 R08: 0000000000000018 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a6a R14: 00000000004cd174 R15: 000000000076bf0c