IPVS: ftp: loaded support on port[0] = 21 INFO: task syz-executor137:8101 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-executor137 D27840 8101 8100 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 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 inode_lock_shared include/linux/fs.h:758 [inline] lookup_slow fs/namei.c:1688 [inline] walk_component+0x798/0xda0 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: 0033:0x7f8360ca9648 Code: Bad RIP value. RSP: 002b:00007ffd14f3b750 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ffd14f3b7c0 RCX: 00007f8360ca9648 RDX: 0000000000090800 RSI: 00007f8360cfb004 RDI: 00000000ffffff9c RBP: 0000000000000002 R08: 0000000000090800 R09: 00007f8360cfb004 R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffd14f3b94c R13: 0000000000000002 R14: 00007ffd14f3b9a0 R15: 00007ffd14f3b990 INFO: task syz-executor137:8124 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-executor137 D27176 8124 8101 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: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: 0033:0x7f8360c661b4 Code: Bad RIP value. RSP: 002b:00007f8360c55e60 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f8360c661b4 RDX: 0000000000004000 RSI: 00007f8360c55ee0 RDI: 00000000ffffff9c RBP: 00007f8360c55ee0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000004000 R13: 0000000000000065 R14: 00007f8360cfd1e8 R15: 00007f8360d304c8 INFO: task syz-executor137:8127 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-executor137 D28800 8127 8101 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 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:748 [inline] fuse_reverse_inval_entry+0xaa/0x660 fs/fuse/dir.c:987 fuse_notify_delete fs/fuse/dev.c:1585 [inline] fuse_notify fs/fuse/dev.c:1819 [inline] fuse_dev_do_write+0x239e/0x2bc0 fs/fuse/dev.c:1894 fuse_dev_write+0x153/0x1e0 fs/fuse/dev.c:1978 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8360ca99b9 Code: Bad RIP value. RSP: 002b:00007f8360c352f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f8360d304d0 RCX: 00007f8360ca99b9 RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 00007f8360cfd1c4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e R13: 0000000000000003 R14: 00007f8360cfd1e8 R15: 00007f8360d304d8 Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 00000000ed155f32 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7845: #0: 00000000aa5aee0f (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-executor137/8101: #0: 000000006ea6b4b7 (&type->i_mutex_dir_key#7){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 000000006ea6b4b7 (&type->i_mutex_dir_key#7){++++}, at: lookup_slow fs/namei.c:1688 [inline] #0: 000000006ea6b4b7 (&type->i_mutex_dir_key#7){++++}, at: walk_component+0x798/0xda0 fs/namei.c:1811 2 locks held by syz-executor137/8124: #0: 000000006ea6b4b7 (&type->i_mutex_dir_key#7){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 000000006ea6b4b7 (&type->i_mutex_dir_key#7){++++}, at: lookup_slow fs/namei.c:1688 [inline] #0: 000000006ea6b4b7 (&type->i_mutex_dir_key#7){++++}, at: walk_component+0x798/0xda0 fs/namei.c:1811 #1: 00000000d874ce5b (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0 fs/fuse/inode.c:365 2 locks held by syz-executor137/8127: #0: 00000000ccd3f5c9 (&fc->killsb){.+.+}, at: fuse_notify_delete fs/fuse/dev.c:1582 [inline] #0: 00000000ccd3f5c9 (&fc->killsb){.+.+}, at: fuse_notify fs/fuse/dev.c:1819 [inline] #0: 00000000ccd3f5c9 (&fc->killsb){.+.+}, at: fuse_dev_do_write+0x2343/0x2bc0 fs/fuse/dev.c:1894 #1: 000000006ea6b4b7 (&type->i_mutex_dir_key#7){++++}, at: inode_lock include/linux/fs.h:748 [inline] #1: 000000006ea6b4b7 (&type->i_mutex_dir_key#7){++++}, at: fuse_reverse_inval_entry+0xaa/0x660 fs/fuse/dir.c:987 ============================================= 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: 4683 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:do_syscall_64+0x37e/0x620 arch/x86/entry/common.c:297 Code: fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e d4 01 00 00 83 63 08 f9 0f 1f 44 00 00 e8 d9 0b 62 00 0f 00 2d 02 e4 5f 07 <48> 83 c4 08 5b 5d 41 5c 41 5d e9 c3 0b 62 00 e8 be 0b 62 00 48 b8 RSP: 0018:ffff8880a149ff28 EFLAGS: 000000d3 RAX: ffff8880a1490340 RBX: ffff8880a1490340 RCX: ffffffff81007956 RDX: 0000000000000000 RSI: ffffffff81007997 RDI: ffff8880a1490348 RBP: ffff8880a149ff58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000100 R14: 0000000000000000 R15: 0000000000000000 FS: 00007ff0ba4818c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff0b785f008 CR3: 00000000a1ad4000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff0b9719f17 Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 RSP: 002b:00007ffe045a97d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000027 RAX: 000000000000124b RBX: 0000560d8fccc1e0 RCX: 00007ff0b9719f17 RDX: 00007ffe045a9890 RSI: 0000000000000000 RDI: 0000560d8fccc1e0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000206 R12: 00007ffe045a9890 R13: 000000000000124b R14: 00007ffe045ac680 R15: 00007ffe045a9c90