IPVS: ftp: loaded support on port[0] = 21 INFO: task syz-executor135:7959 blocked for more than 140 seconds. Not tainted 4.14.301-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor135 D28368 7959 7958 0x00000000 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3489 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 fuse_lock_inode+0xb0/0xe0 fs/fuse/inode.c:371 fuse_lookup+0xa0/0x3e0 fs/fuse/dir.c:370 lookup_slow+0x20a/0x400 fs/namei.c:1696 walk_component+0x6a1/0xbc0 fs/namei.c:1825 link_path_walk+0x823/0x10a0 fs/namei.c:2154 path_openat+0x15e/0x2970 fs/namei.c:3570 do_filp_open+0x179/0x3c0 fs/namei.c:3605 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7ff446989e58 RSP: 002b:00007ffc9feb3410 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ffc9feb3480 RCX: 00007ff446989e58 RDX: 0000000000090800 RSI: 00007ff4469e0004 RDI: 00000000ffffff9c RBP: 0000000000000002 R08: 0000000000090800 R09: 00007ff4469e0004 R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffc9feb360c R13: 0000000000000002 R14: 00007ffc9feb3660 R15: 00007ffc9feb3650 INFO: task syz-executor135:7986 blocked for more than 140 seconds. Not tainted 4.14.301-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor135 D27488 7986 7959 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 request_wait_answer+0x30d/0x620 fs/fuse/dev.c:478 __fuse_request_send+0x108/0x1a0 fs/fuse/dev.c:498 fuse_request_send fs/fuse/dev.c:511 [inline] fuse_simple_request+0x2fa/0x790 fs/fuse/dev.c:569 fuse_lookup_name+0x228/0x550 fs/fuse/dir.c:330 fuse_lookup+0x102/0x3e0 fs/fuse/dir.c:371 lookup_slow+0x20a/0x400 fs/namei.c:1696 walk_component+0x6a1/0xbc0 fs/namei.c:1825 link_path_walk+0x823/0x10a0 fs/namei.c:2154 path_lookupat+0xcb/0x780 fs/namei.c:2342 do_o_path fs/namei.c:3530 [inline] path_openat+0x18eb/0x2970 fs/namei.c:3559 do_filp_open+0x179/0x3c0 fs/namei.c:3605 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7ff44698a1c9 RSP: 002b:00007ff44691a2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ff446a134d0 RCX: 00007ff44698a1c9 RDX: 0000000000200000 RSI: 0000000020000340 RDI: ffffffffffffff9c RBP: 00007ff4469e01bc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e R13: 65646f6d746f6f72 R14: 6873612f7665642f R15: 00007ff446a134d8 Showing all locks held in the system: 1 lock held by khungtaskd/1533: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 2 locks held by syz-executor135/7959: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock_shared include/linux/fs.h:729 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lookup_slow+0x129/0x400 fs/namei.c:1674 #1: (&fi->mutex){+.+.}, at: [] fuse_lock_inode+0xb0/0xe0 fs/fuse/inode.c:371 2 locks held by syz-executor135/7986: #0: (&type->i_mutex_dir_key#7){++++}, at: [] inode_lock_shared include/linux/fs.h:729 [inline] #0: (&type->i_mutex_dir_key#7){++++}, at: [] lookup_slow+0x129/0x400 fs/namei.c:1674 #1: (&fi->mutex){+.+.}, at: [] fuse_lock_inode+0xb0/0xe0 fs/fuse/inode.c:371 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1533 Comm: khungtaskd Not tainted 4.14.301-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4627 Comm: systemd-journal Not tainted 4.14.301-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 task: ffff8880a11fa200 task.stack: ffff8880a1200000 RIP: 0010:page_expected_state mm/page_alloc.c:918 [inline] RIP: 0010:check_new_page mm/page_alloc.c:1718 [inline] RIP: 0010:check_new_pages mm/page_alloc.c:1759 [inline] RIP: 0010:rmqueue mm/page_alloc.c:2845 [inline] RIP: 0010:get_page_from_freelist+0x1016/0x25a0 mm/page_alloc.c:3173 RSP: 0018:ffff8880a12079f8 EFLAGS: 00000046 RAX: 00000000ffffffff RBX: 0000000000000000 RCX: 0000000000000002 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea000255dc58 RBP: ffffea000255dc40 R08: ffffffff8b9c10e0 R09: 00000000000c001e R10: dffffc0000000000 R11: 0000000000000100 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88813fffb6c0 FS: 00007fa57eca68c0(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa57c07b000 CR3: 00000000a18f1000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __alloc_pages_nodemask+0x352/0x2900 mm/page_alloc.c:4219 __alloc_pages include/linux/gfp.h:484 [inline] __alloc_pages_node include/linux/gfp.h:497 [inline] kmem_getpages mm/slab.c:1419 [inline] cache_grow_begin+0x91/0x700 mm/slab.c:2676 cache_alloc_refill+0x273/0x350 mm/slab.c:3043 ____cache_alloc mm/slab.c:3125 [inline] __do_cache_alloc mm/slab.c:3347 [inline] slab_alloc mm/slab.c:3382 [inline] kmem_cache_alloc+0x333/0x3c0 mm/slab.c:3550 getname_flags+0xc8/0x550 fs/namei.c:138 user_path_at_empty+0x2a/0x50 fs/namei.c:2631 user_path_at include/linux/namei.h:57 [inline] SYSC_faccessat fs/open.c:403 [inline] SyS_faccessat+0x21b/0x680 fs/open.c:353 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fa57df619c7 RSP: 002b:00007ffff6ba6808 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007ffff6ba9830 RCX: 00007fa57df619c7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055d53361c9a3 RBP: 00007ffff6ba6950 R08: 000055d5336123e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 000055d534b3a8a0 R15: 00007ffff6ba6e40 Code: 04 00 00 48 8d 7d 18 48 89 f8 48 c1 e8 03 42 0f b6 14 28 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 18 14 00 00 8b 45 18 <83> f8 ff 0f 84 3c ff ff ff 48 89 ef e8 39 40 ff ff 8b 4c 24 18