IPVS: ftp: loaded support on port[0] = 21 INFO: task syz-executor461:8090 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-executor461 D27504 8090 8089 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: 0033:0x7f7c0adf7088 Code: Bad RIP value. RSP: 002b:00007fff33184b60 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fff33184bd0 RCX: 00007f7c0adf7088 RDX: 0000000000090800 RSI: 00007f7c0ae4d004 RDI: 00000000ffffff9c RBP: 0000000000000002 R08: 0000000000090800 R09: 00007f7c0ae4d004 R10: 0000000000000000 R11: 0000000000000287 R12: 00007fff33184d5c R13: 0000000000000002 R14: 00007fff33184db0 R15: 00007fff33184da0 INFO: task syz-executor461:8114 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-executor461 D27272 8114 8090 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: 0033:0x7f7c0adf73f9 Code: Bad RIP value. RSP: 002b:00007f7c0ada82f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f7c0ae824c0 RCX: 00007f7c0adf73f9 RDX: 0000000000000042 RSI: 0000000020002080 RDI: ffffffffffffff9c RBP: 00007f7c0ae4f1c4 R08: 0000000000000065 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000065 R13: 00007f7c0ae4f1e8 R14: 31f4000000000002 R15: 00007f7c0ae824c8 INFO: task syz-executor461:8117 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-executor461 D29072 8117 8090 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: 0033:0x7f7c0adf73f9 Code: Bad RIP value. RSP: 002b:00007f7c0ad872f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f7c0ae824d0 RCX: 00007f7c0adf73f9 RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 00007f7c0ae4f1c4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00007f7c0ae4f1e8 R14: 31f4000000000002 R15: 00007f7c0ae824d8 Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 000000004a97fe08 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by syz-executor461/8090: #0: 00000000ca1c53fd (&type->i_mutex_dir_key#7){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 00000000ca1c53fd (&type->i_mutex_dir_key#7){++++}, at: lookup_slow fs/namei.c:1688 [inline] #0: 00000000ca1c53fd (&type->i_mutex_dir_key#7){++++}, at: walk_component+0x798/0xda0 fs/namei.c:1811 2 locks held by syz-executor461/8114: #0: 00000000ca1c53fd (&type->i_mutex_dir_key#7){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 00000000ca1c53fd (&type->i_mutex_dir_key#7){++++}, at: lookup_slow fs/namei.c:1688 [inline] #0: 00000000ca1c53fd (&type->i_mutex_dir_key#7){++++}, at: walk_component+0x798/0xda0 fs/namei.c:1811 #1: 00000000ddb5b05d (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0 fs/fuse/inode.c:365 2 locks held by syz-executor461/8117: #0: 000000009cd85bcc (&fc->killsb){.+.+}, at: fuse_notify_delete fs/fuse/dev.c:1582 [inline] #0: 000000009cd85bcc (&fc->killsb){.+.+}, at: fuse_notify fs/fuse/dev.c:1819 [inline] #0: 000000009cd85bcc (&fc->killsb){.+.+}, at: fuse_dev_do_write+0x2343/0x2bc0 fs/fuse/dev.c:1894 #1: 00000000ca1c53fd (&type->i_mutex_dir_key#7){++++}, at: inode_lock include/linux/fs.h:748 [inline] #1: 00000000ca1c53fd (&type->i_mutex_dir_key#7){++++}, at: fuse_reverse_inval_entry+0xaa/0x660 fs/fuse/dir.c:987 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4694 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:link_path_walk.part.0+0x2/0x1230 fs/namei.c:2069 Code: f2 ff e9 97 f8 ff ff e8 bc 21 f2 ff e9 59 f8 ff ff e8 22 21 f2 ff e9 e1 f8 ff ff e8 a8 21 f2 ff e9 a6 f8 ff ff 0f 1f 00 41 57 <49> 89 ff 41 56 49 89 f6 41 55 41 54 55 53 48 bb 00 00 00 00 00 fc RSP: 0018:ffff8880a0fdfb60 EFLAGS: 00000293 RAX: ffff8880a0fd2600 RBX: 0000000000000000 RCX: ffffffff81a6697e RDX: 0000000000000000 RSI: ffff8880a0fdfce0 RDI: ffff8880af9c2a20 RBP: ffff8880af9c2a20 R08: ffffffff8cd37ca0 R09: fffffffffffff000 R10: 0000000000000007 R11: 0000000000000000 R12: ffff8880a0fd2600 R13: ffff8880a0fdfce0 R14: 0000000000000001 R15: ffff8880a0fdfe90 FS: 00007f326ca118c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3269dee010 CR3: 00000000a0e62000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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: 0033:0x7f326bfa0840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007fff16cafbf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fff16caff00 RCX: 00007f326bfa0840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055ec2a11fc10 RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000055ec2a113040 R14: 00007fff16cafec0 R15: 000055ec2a11fc60