====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/31276 is trying to acquire lock: 00000000f868b080 (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 but task is already holding lock: 0000000048cd7c8f (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] 0000000048cd7c8f (sb_writers#3){.+.+}, at: do_sendfile+0x97d/0xc30 fs/read_write.c:1446 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (sb_writers#3){.+.+}: sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:360 ovl_create_object+0x96/0x290 fs/overlayfs/dir.c:602 lookup_open+0x893/0x1a20 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] path_openat+0x1094/0x2df0 fs/namei.c:3537 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 -> #2 (&ovl_i_mutex_dir_key[depth]){++++}: inode_lock_shared include/linux/fs.h:758 [inline] do_last fs/namei.c:3326 [inline] path_openat+0x17ec/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_open_execat+0x11d/0x5b0 fs/exec.c:853 __do_execve_file+0x1a8b/0x2360 fs/exec.c:1770 do_execveat_common fs/exec.c:1879 [inline] do_execve+0x35/0x50 fs/exec.c:1896 __do_sys_execve fs/exec.c:1977 [inline] __se_sys_execve fs/exec.c:1972 [inline] __x64_sys_execve+0x7c/0xa0 fs/exec.c:1972 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&sig->cred_guard_mutex){+.+.}: do_io_accounting fs/proc/base.c:2750 [inline] proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 proc_single_show+0xeb/0x170 fs/proc/base.c:755 seq_read+0x4e0/0x11c0 fs/seq_file.c:232 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&p->lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 seq_read+0x6b/0x11c0 fs/seq_file.c:164 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x471/0x630 fs/read_write.c:925 vfs_readv+0xe5/0x150 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x457/0xa00 fs/splice.c:417 do_splice_to+0x10e/0x160 fs/splice.c:881 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959 do_splice_direct+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &p->lock --> &ovl_i_mutex_dir_key[depth] --> sb_writers#3 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_writers#3); lock(&ovl_i_mutex_dir_key[depth]); lock(sb_writers#3); lock(&p->lock); *** DEADLOCK *** 1 lock held by syz-executor.5/31276: #0: 0000000048cd7c8f (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 0000000048cd7c8f (sb_writers#3){.+.+}, at: do_sendfile+0x97d/0xc30 fs/read_write.c:1446 stack backtrace: CPU: 0 PID: 31276 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/18/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2420 [inline] __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 seq_read+0x6b/0x11c0 fs/seq_file.c:164 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x471/0x630 fs/read_write.c:925 vfs_readv+0xe5/0x150 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x457/0xa00 fs/splice.c:417 do_splice_to+0x10e/0x160 fs/splice.c:881 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959 do_splice_direct+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7faa09fbb109 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007faa08930168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007faa0a0cdf60 RCX: 00007faa09fbb109 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 00007faa0a01505d R08: 0000000000000000 R09: 0000000000000000 R10: 4000000000010046 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc37006fff R14: 00007faa08930300 R15: 0000000000022000 EXT4-fs (loop2): Unrecognized mount option "”" or missing value EXT4-fs (loop2): Unrecognized mount option "”" or missing value A link change request failed with some changes committed already. Interface ipvlan0 may have been left with an inconsistent configuration, please check. EXT4-fs (loop2): Unrecognized mount option "”" or missing value A link change request failed with some changes committed already. Interface ipvlan0 may have been left with an inconsistent configuration, please check. ptrace attach of "/root/syz-executor.1 exec"[8103] was attempted by "/root/syz-executor.1 exec"[31376] 8021q: adding VLAN 0 to HW filter on device ipvlan2 A link change request failed with some changes committed already. Interface ipvlan0 may have been left with an inconsistent configuration, please check. 8021q: adding VLAN 0 to HW filter on device ipvlan3 ptrace attach of "/root/syz-executor.1 exec"[8103] was attempted by "/root/syz-executor.1 exec"[31430] 8021q: adding VLAN 0 to HW filter on device ipvlan4 8021q: adding VLAN 0 to HW filter on device ipvlan5 A link change request failed with some changes committed already. Interface ipvlan0 may have been left with an inconsistent configuration, please check. 8021q: adding VLAN 0 to HW filter on device ipvlan6 A link change request failed with some changes committed already. Interface ipvlan0 may have been left with an inconsistent configuration, please check. 8021q: adding VLAN 0 to HW filter on device ipvlan7 8021q: adding VLAN 0 to HW filter on device ipvlan8 8021q: adding VLAN 0 to HW filter on device ipvlan9 8021q: adding VLAN 0 to HW filter on device ipvlan10 8021q: adding VLAN 0 to HW filter on device ipvlan11 8021q: adding VLAN 0 to HW filter on device ipvlan12 8021q: adding VLAN 0 to HW filter on device ipvlan13 8021q: adding VLAN 0 to HW filter on device ipvlan14 8021q: adding VLAN 0 to HW filter on device ipvlan15 8021q: adding VLAN 0 to HW filter on device ipvlan16 8021q: adding VLAN 0 to HW filter on device ipvlan17 8021q: adding VLAN 0 to HW filter on device ipvlan18 8021q: adding VLAN 0 to HW filter on device ipvlan19 8021q: adding VLAN 0 to HW filter on device ipvlan20 8021q: adding VLAN 0 to HW filter on device ipvlan21 8021q: adding VLAN 0 to HW filter on device ipvlan22 8021q: adding VLAN 0 to HW filter on device ipvlan23 8021q: adding VLAN 0 to HW filter on device ipvlan24 8021q: adding VLAN 0 to HW filter on device ipvlan25 8021q: adding VLAN 0 to HW filter on device ipvlan26 8021q: adding VLAN 0 to HW filter on device ipvlan27 ptrace attach of "/root/syz-executor.1 exec"[8103] was attempted by "/root/syz-executor.1 exec"[31521] (syz-executor.4,31523,1):ocfs2_parse_options:1499 ERROR: Unrecognized mount option "#" or missing value 8021q: adding VLAN 0 to HW filter on device ipvlan28 ptrace attach of "/root/syz-executor.1 exec"[8103] was attempted by "/root/syz-executor.1 exec"[31521] (syz-executor.4,31523,1):ocfs2_fill_super:1225 ERROR: status = -22 8021q: adding VLAN 0 to HW filter on device ipvlan29 ptrace attach of "/root/syz-executor.1 exec"[8103] was attempted by "/root/syz-executor.1 exec"[31521] device vlan3 entered promiscuous mode device macvtap0 entered promiscuous mode ptrace attach of "/root/syz-executor.1 exec"[8103] was attempted by "/root/syz-executor.1 exec"[31521] ptrace attach of "/root/syz-executor.1 exec"[8103] was attempted by "/root/syz-executor.1 exec"[31521] device macvtap0 left promiscuous mode ptrace attach of "/root/syz-executor.1 exec"[8103] was attempted by "/root/syz-executor.1 exec"[31521] ptrace attach of "/root/syz-executor.1 exec"[8103] was attempted by "/root/syz-executor.1 exec"[31521] ptrace attach of "/root/syz-executor.1 exec"[8103] was attempted by "/root/syz-executor.1 exec"[31521] (syz-executor.4,31551,0):ocfs2_parse_options:1499 ERROR: Unrecognized mount option "#" or missing value (syz-executor.4,31551,1):ocfs2_fill_super:1225 ERROR: status = -22 A link change request failed with some changes committed already. Interface ipvlan0 may have been left with an inconsistent configuration, please check. tmpfs: No value for mount option './bus' 8021q: adding VLAN 0 to HW filter on device ipvlan30 tmpfs: No value for mount option './bus' : renamed from caif0 (syz-executor.4,31593,1):ocfs2_parse_options:1499 ERROR: Unrecognized mount option "#" or missing value chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 (syz-executor.4,31593,1):ocfs2_fill_super:1225 ERROR: status = -22 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface  may have been left with an inconsistent configuration, please check. device vlan3 entered promiscuous mode device macvtap0 entered promiscuous mode device macvtap0 left promiscuous mode print_req_error: I/O error, dev loop3, sector 0 print_req_error: I/O error, dev loop3, sector 0 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface  may have been left with an inconsistent configuration, please check. chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface  may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface ipvlan0 may have been left with an inconsistent configuration, please check. chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected kauditd_printk_skb: 7 callbacks suppressed audit: type=1800 audit(1656674099.966:255): pid=31714 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="sda1" ino=15073 res=0 audit: type=1804 audit(1656674100.016:256): pid=31714 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir2838095078/syzkaller.YNoBhx/346/file0/file0" dev="sda1" ino=15073 res=1 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect audit: type=1800 audit(1656674100.156:257): pid=31740 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="sda1" ino=15259 res=0 chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected audit: type=1804 audit(1656674100.176:258): pid=31744 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir2838095078/syzkaller.YNoBhx/347/file0" dev="sda1" ino=15259 res=1 audit: type=1800 audit(1656674100.276:259): pid=31754 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=14628 res=0 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. audit: type=1804 audit(1656674100.336:260): pid=31754 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3689710185/syzkaller.LynPou/325/file0/file0" dev="sda1" ino=14628 res=1 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. audit: type=1800 audit(1656674100.356:261): pid=31780 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="sda1" ino=15272 res=0 audit: type=1804 audit(1656674100.356:262): pid=31788 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir2838095078/syzkaller.YNoBhx/348/file0" dev="sda1" ino=15272 res=1 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. audit: type=1800 audit(1656674100.566:263): pid=31811 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=15263 res=0 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. audit: type=1804 audit(1656674100.676:264): pid=31811 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3689710185/syzkaller.LynPou/326/file0/file0" dev="sda1" ino=15263 res=1 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected net_ratelimit: 19 callbacks suppressed A link change request failed with some changes committed already. Interface  may have been left with an inconsistent configuration, please check. chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface  may have been left with an inconsistent configuration, please check. chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface  may have been left with an inconsistent configuration, please check. chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface  may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface ipvlan0 may have been left with an inconsistent configuration, please check. kauditd_printk_skb: 23 callbacks suppressed audit: type=1800 audit(1656674104.976:288): pid=32180 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=14546 res=0 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface  may have been left with an inconsistent configuration, please check. audit: type=1800 audit(1656674105.386:289): pid=32205 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=14401 res=0 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected audit: type=1800 audit(1656674105.606:290): pid=32227 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=14421 res=0 A link change request failed with some changes committed already. Interface  may have been left with an inconsistent configuration, please check. chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface  may have been left with an inconsistent configuration, please check. audit: type=1800 audit(1656674105.896:291): pid=32252 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=14321 res=0 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface  may have been left with an inconsistent configuration, please check. chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect audit: type=1800 audit(1656674106.316:292): pid=32282 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=14165 res=0 chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface  may have been left with an inconsistent configuration, please check.