IPVS: ftp: loaded support on port[0] = 21 INFO: task syz-executor311:8122 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor311 D27536 8122 8121 0x00000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078 fuse_lock_inode+0xaf/0xe0 fs/fuse/inode.c:365 fuse_lookup+0x86/0x410 fs/fuse/dir.c:367 __lookup_slow+0x246/0x4a0 fs/namei.c:1672 lookup_slow fs/namei.c:1689 [inline] walk_component+0x7ac/0xda0 fs/namei.c:1811 link_path_walk.part.0+0x901/0x1230 fs/namei.c:2142 link_path_walk fs/namei.c:2073 [inline] path_openat+0x1db/0x2df0 fs/namei.c:3536 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fe6a33aae58 Code: Bad RIP value. RSP: 002b:00007ffc1c34a740 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ffc1c34a7b0 RCX: 00007fe6a33aae58 RDX: 0000000000090800 RSI: 00007fe6a3401004 RDI: 00000000ffffff9c RBP: 0000000000000002 R08: 0000000000090800 R09: 00007fe6a3401004 R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffc1c34a93c R13: 0000000000000002 R14: 00007ffc1c34a990 R15: 00007ffc1c34a980 INFO: task syz-executor311:8148 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor311 D27528 8148 8122 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 request_wait_answer+0x3dc/0x750 fs/fuse/dev.c:485 __fuse_request_send+0x123/0x1c0 fs/fuse/dev.c:505 fuse_simple_request+0x2e6/0x820 fs/fuse/dev.c:576 fuse_lookup_name+0x24c/0x5c0 fs/fuse/dir.c:330 fuse_lookup+0xdf/0x410 fs/fuse/dir.c:368 __lookup_slow+0x246/0x4a0 fs/namei.c:1672 lookup_slow fs/namei.c:1689 [inline] walk_component+0x7ac/0xda0 fs/namei.c:1811 link_path_walk.part.0+0x901/0x1230 fs/namei.c:2142 link_path_walk fs/namei.c:2270 [inline] path_lookupat+0xe4/0x8d0 fs/namei.c:2318 do_o_path fs/namei.c:3511 [inline] path_openat+0x1f92/0x2df0 fs/namei.c:3533 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fe6a33ab1c9 Code: Bad RIP value. RSP: 002b:00007fe6a333b2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fe6a34344d0 RCX: 00007fe6a33ab1c9 RDX: 0000000000200000 RSI: 0000000020000340 RDI: ffffffffffffff9c RBP: 00007fe6a34011bc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e R13: 65646f6d746f6f72 R14: 6873612f7665642f R15: 00007fe6a34344d8 Showing all locks held in the system: 1 lock held by ksoftirqd/0/9: #0: 00000000e500f43e (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 00000000e500f43e (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 1 lock held by khungtaskd/1570: #0: 000000005235cee2 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 2 locks held by syz-executor311/8122: #0: 000000002e4ad9c1 (&type->i_mutex_dir_key#7){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 000000002e4ad9c1 (&type->i_mutex_dir_key#7){++++}, at: lookup_slow fs/namei.c:1688 [inline] #0: 000000002e4ad9c1 (&type->i_mutex_dir_key#7){++++}, at: walk_component+0x798/0xda0 fs/namei.c:1811 #1: 00000000aca68daf (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0 fs/fuse/inode.c:365 2 locks held by syz-executor311/8148: #0: 000000002e4ad9c1 (&type->i_mutex_dir_key#7){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 000000002e4ad9c1 (&type->i_mutex_dir_key#7){++++}, at: lookup_slow fs/namei.c:1688 [inline] #0: 000000002e4ad9c1 (&type->i_mutex_dir_key#7){++++}, at: walk_component+0x798/0xda0 fs/namei.c:1811 #1: 00000000aca68daf (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0 fs/fuse/inode.c:365 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 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+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 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: 4694 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:___bpf_prog_run+0x6e/0x4e80 kernel/bpf/core.c:1065 Code: ff 4c 89 f0 4c 89 f2 48 c1 e8 03 83 e2 07 0f b6 04 18 38 d0 7f 08 84 c0 0f 85 f7 38 00 00 45 0f b6 3e 4a 8d 3c fd 60 b4 6f 88 <4c> 89 fe 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 c7 38 00 00 43 ff RSP: 0018:ffff8880a082fa30 EFLAGS: 00000246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff8880a082fe70 RDX: 0000000000000000 RSI: ffffffff816c36e5 RDI: ffffffff886fba00 RBP: ffff8880a082fb00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: ffffffff886fb460 R13: ffffed1014105f62 R14: ffffc90001ad4058 R15: 00000000000000b4 FS: 00007fc6658928c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc662c6c000 CR3: 00000000a084c000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: