INFO: task syz-executor988:6868 blocked for more than 143 seconds. Not tainted 5.9.0-rc2-next-20200828-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor988 state:D stack:23912 pid: 6868 ppid: 6867 flags:0x00004000 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 schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1855 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+0x163/0x260 kernel/sched/completion.c:138 __flush_work+0x51f/0xab0 kernel/workqueue.c:3046 __cancel_work_timer+0x5de/0x700 kernel/workqueue.c:3133 tls_sk_proto_close+0x4a7/0xaf0 net/tls/tls_main.c:305 inet_release+0x12e/0x280 net/ipv4/af_inet.c:431 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:475 __sock_release+0xcd/0x280 net/socket.c:596 sock_close+0x18/0x20 net/socket.c:1277 __fput+0x285/0x920 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:141 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:140 [inline] exit_to_user_mode_prepare+0x195/0x1c0 kernel/entry/common.c:167 syscall_exit_to_user_mode+0x59/0x2b0 kernel/entry/common.c:242 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x403950 Code: Bad RIP value. RSP: 002b:00007ffd58af5878 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000403950 RDX: 00000000000000d8 RSI: 00000000200005c0 RDI: 0000000000000004 RBP: 00007ffd58af5880 R08: 0000000000000000 R09: 00000000000000d8 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd58af5890 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1172: #0: ffffffff89c67640 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5825 3 locks held by kworker/0:3/3103: #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 kernel/workqueue.c:2240 #1: ffffc900096efda8 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 kernel/workqueue.c:2244 #2: ffff8880a83c54d8 (&ctx->tx_lock){+.+.}-{3:3}, at: tx_work_handler+0x127/0x190 net/tls/tls_sw.c:2251 2 locks held by in:imklog/6715: #0: ffff8880a2116870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 #1: ffffffff89d17c80 (fs_reclaim){+.+.}-{0:0}, at: is_bpf_text_address+0x0/0x160 kernel/bpf/core.c:691 1 lock held by syz-executor988/6868: #0: ffff888085d02750 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:779 [inline] #0: ffff888085d02750 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:595 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1172 Comm: khungtaskd Not tainted 5.9.0-rc2-next-20200828-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+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:147 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline] watchdog+0xd89/0xf30 kernel/hung_task.c:339 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3903 Comm: systemd-journal Not tainted 5.9.0-rc2-next-20200828-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:cache_grow_end+0x98/0x170 mm/slab.c:2664 Code: 10 4d 89 6c 24 68 4c 89 7d 08 4c 89 75 10 4d 89 2e 49 83 44 24 78 01 8b 43 24 4c 89 e7 2b 45 30 49 01 84 24 80 00 00 00 5b 5d <41> 5c 41 5d 41 5e 41 5f e9 1b 05 46 06 4c 89 ef e8 03 7d ec 01 84 RSP: 0018:ffffc90001fdfd48 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000cc0 RCX: ffffffff815b58a0 RDX: ffffea0002366008 RSI: ffff8880aa240150 RDI: ffff8880aa240100 RBP: ffffea0002695b80 R08: 0000000000000001 R09: 0000000000000003 R10: fffff520003fbf99 R11: 0000000000000000 R12: ffff8880aa240100 R13: ffffea0002695b88 R14: ffffea0002366008 R15: ffff8880aa240150 FS: 00007f17316d18c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f172ea79028 CR3: 0000000092aba000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cache_alloc_refill+0x2fd/0x340 mm/slab.c:2971 ____cache_alloc mm/slab.c:3045 [inline] ____cache_alloc mm/slab.c:3028 [inline] __do_cache_alloc mm/slab.c:3268 [inline] slab_alloc mm/slab.c:3304 [inline] kmem_cache_alloc+0x380/0x3a0 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: 0033:0x7f173098d687 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:00007ffd66ffa6a8 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd66ffd710 RCX: 00007f173098d687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 00005634256988a0 RBP: 00007ffd66ffa6e0 R08: 0000563424d8f3e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 00005634256988a0 R15: 00007ffd66ffad20