INFO: task syz-executor389:6870 blocked for more than 143 seconds. Not tainted 5.9.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor389 state:D stack:28096 pid: 6870 ppid: 6864 flags:0xa0020002 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x8e5/0x21e0 kernel/sched/core.c:4527 schedule+0xd0/0x2a0 kernel/sched/core.c:4602 io_uring_cancel_files fs/io_uring.c:8126 [inline] io_uring_flush+0x759/0xe60 fs/io_uring.c:8143 filp_close+0xb4/0x170 fs/open.c:1276 close_files fs/file.c:401 [inline] put_files_struct fs/file.c:429 [inline] put_files_struct+0x1cc/0x350 fs/file.c:426 exit_files+0x7e/0xa0 fs/file.c:458 do_exit+0xb43/0x29f0 kernel/exit.c:801 do_group_exit+0x125/0x310 kernel/exit.c:903 __do_sys_exit_group kernel/exit.c:914 [inline] __se_sys_exit_group kernel/exit.c:912 [inline] __ia32_sys_exit_group+0x3a/0x50 kernel/exit.c:912 do_syscall_32_irqs_on arch/x86/entry/common.c:84 [inline] __do_fast_syscall_32+0x57/0x80 arch/x86/entry/common.c:126 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:149 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f1d549 Code: Bad RIP value. RSP: 002b:00000000ff86a61c EFLAGS: 00000292 ORIG_RAX: 00000000000000fc RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000080ec2d8 RDX: 0000000000000000 RSI: 00000000080d62b8 RDI: 00000000080ec2e0 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1165: #0: ffffffff89bd6340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5825 2 locks held by in:imklog/6755: #0: ffff8880a2956af0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 #1: ffffffff89c85480 (fs_reclaim){+.+.}-{0:0}, at: spin_lock include/linux/spinlock.h:354 [inline] #1: ffffffff89c85480 (fs_reclaim){+.+.}-{0:0}, at: cache_grow_end+0x46/0x170 mm/slab.c:2651 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1165 Comm: khungtaskd Not tainted 5.9.0-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+0x18f/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd7d/0x1000 kernel/hung_task.c:295 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3902 Comm: systemd-journal Not tainted 5.9.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:current_gfp_context include/linux/sched/mm.h:181 [inline] RIP: 0010:__need_fs_reclaim mm/page_alloc.c:4193 [inline] RIP: 0010:fs_reclaim_acquire+0x1/0xf0 mm/page_alloc.c:4225 Code: 00 08 00 75 07 a9 00 00 04 00 74 8e 5b 5d c3 e8 b5 49 09 00 e9 77 ff ff ff e8 ab 49 09 00 eb b7 66 0f 1f 84 00 00 00 00 00 55 <65> 48 8b 04 25 c0 fe 01 00 48 89 e5 41 56 49 89 c6 53 89 fb 48 8d RSP: 0018:ffffc900053afd88 EFLAGS: 00000206 RAX: 0000000000000000 RBX: ffffc900053afdd8 RCX: 0000000000000cc0 RDX: 0000000000000001 RSI: ffffc900053afdd8 RDI: 0000000000000cc0 RBP: 0000000000000cc0 R08: 0000000000000001 R09: 0000000000000001 R10: 000000007fff0000 R11: 0000000000000000 R12: ffff88821bc47a00 R13: 0000000000000001 R14: ffff88821bc47a00 R15: ffffffff8ab24948 FS: 00007fe1d218d8c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe1cf52b008 CR3: 00000000938f9000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: slab_pre_alloc_hook.constprop.0+0x20/0x1f0 mm/slab.h:495 slab_alloc mm/slab.c:3298 [inline] kmem_cache_alloc+0x46/0x3a0 mm/slab.c:3482 getname_flags.part.0+0x50/0x4f0 fs/namei.c:138 getname_flags+0x9a/0xe0 include/linux/audit.h:320 getname fs/namei.c:209 [inline] user_path_create fs/namei.c:3524 [inline] do_mkdirat+0x8d/0x2d0 fs/namei.c:3664 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fe1d1449687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffcade3f8f8 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffcade42960 RCX: 00007fe1d1449687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 0000556bf67218a0 RBP: 00007ffcade3f930 R08: 0000556bf497d3e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000556bf67218a0 R15: 00007ffcade3ff70