INFO: task syz-executor.1:10895 blocked for more than 143 seconds. Not tainted 6.6.0-syzkaller-15866-g2bd5b559a1f3 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:26384 pid:10895 tgid:10895 ppid:5117 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0xee2/0x59a0 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0xe7/0x270 kernel/sched/core.c:6778 schedule_timeout+0x278/0x2c0 kernel/time/timer.c:2143 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x3e0/0x5f0 kernel/sched/completion.c:116 __flush_work+0x523/0xa10 kernel/workqueue.c:3407 __cancel_work_timer+0x3ef/0x580 kernel/workqueue.c:3494 tls_sk_proto_close+0x4b1/0xac0 net/tls/tls_main.c:376 inet_release+0x132/0x270 net/ipv4/af_inet.c:433 inet6_release+0x4f/0x70 net/ipv6/af_inet6.c:485 __sock_release+0xae/0x260 net/socket.c:659 sock_close+0x1c/0x20 net/socket.c:1419 __fput+0x270/0xbb0 fs/file_table.c:394 __fput_sync+0x47/0x50 fs/file_table.c:475 __do_sys_close fs/open.c:1590 [inline] __se_sys_close fs/open.c:1575 [inline] __x64_sys_close+0x87/0xf0 fs/open.c:1575 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f0dd427b9da RSP: 002b:00007ffcf5caa800 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f0dd427b9da RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f0dd439d980 R08: 0000001b32a20000 R09: 0000000000001f88 R10: 00000000813a82ce R11: 0000000000000293 R12: 00000000002bfdf3 R13: ffffffffffffffff R14: 00007f0dd3e00000 R15: 00000000002bfab2 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #0: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #0: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613 2 locks held by getty/4825: #0: ffff88802a6f20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201 3 locks held by kworker/1:16/27831: #0: ffff888013070d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc900153cfd80 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffff8880744614f0 (&ctx->tx_lock){+.+.}-{3:3}, at: tx_work_handler+0x134/0x230 net/tls/tls_sw.c:2535 1 lock held by syz-executor.1/10895: #0: ffff8880797a4410 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #0: ffff8880797a4410 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x260 net/socket.c:658 1 lock held by syz-executor.2/11772: 1 lock held by syz-executor.4/11793: 1 lock held by syz-executor.3/11813: #0: ffff8880477fa5c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe7/0x170 fs/file.c:1177 3 locks held by syz-executor.3/11814: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-syzkaller-15866-g2bd5b559a1f3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xf87/0x1210 kernel/hung_task.c:379 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4511 Comm: klogd Not tainted 6.6.0-syzkaller-15866-g2bd5b559a1f3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:227 [inline] RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:239 [inline] RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline] RIP: 0010:__lock_acquire+0xf4e/0x5de0 kernel/locking/lockdep.c:5106 Code: e8 07 8c e5 ff 0f 0b 31 c0 e9 87 f7 ff ff 48 63 db be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 fe f1 91 e8 92 f0 76 00 <48> 0f a3 1d 6a 56 89 10 0f 82 63 fa ff ff e8 df 42 f7 02 85 c0 74 RSP: 0018:ffffc9000316f5b8 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 00000000000000b0 RCX: ffffffff8168a80e RDX: fffffbfff23e3fd3 RSI: 0000000000000008 RDI: ffffffff91f1fe90 RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff23e3fd2 R10: ffffffff91f1fe97 R11: 0000000000000000 R12: ffff8880749528ca R13: ffff8880749528a8 R14: 0000000000000000 R15: 0000000000000001 FS: 00007f52c3e08380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020225030 CR3: 0000000029584000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 fs_reclaim_acquire mm/page_alloc.c:3710 [inline] fs_reclaim_acquire+0xcc/0x150 mm/page_alloc.c:3701 might_alloc include/linux/sched/mm.h:303 [inline] slab_pre_alloc_hook mm/slab.h:710 [inline] slab_alloc_node mm/slub.c:3460 [inline] __kmem_cache_alloc_node+0x51/0x310 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc_node_track_caller+0x50/0x100 mm/slab_common.c:1027 kmalloc_reserve+0xef/0x260 net/core/skbuff.c:582 __alloc_skb+0x12b/0x330 net/core/skbuff.c:651 alloc_skb include/linux/skbuff.h:1286 [inline] alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331 sock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780 unix_dgram_sendmsg+0x464/0x1ca0 net/unix/af_unix.c:1976 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 __sys_sendto+0x255/0x340 net/socket.c:2190 __do_sys_sendto net/socket.c:2202 [inline] __se_sys_sendto net/socket.c:2198 [inline] __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2198 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f52c3f6a9b5 Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffea178dc38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f52c3f6a9b5 RDX: 0000000000000039 RSI: 000055a1ea979a20 RDI: 0000000000000003 RBP: 000055a1ea972910 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013 R13: 00007f52c40f8212 R14: 00007ffea178dd38 R15: 0000000000000000