====================================================== WARNING: possible circular locking dependency detected 4.20.0+ #3 Not tainted ------------------------------------------------------ syz-executor2/28653 is trying to acquire lock: 00000000a1118711 (&ovl_i_mutex_dir_key[depth]){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline] 00000000a1118711 (&ovl_i_mutex_dir_key[depth]){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1687 but task is already holding lock: 00000000dda0fb96 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x9c3/0x2f00 kernel/events/core.c:10511 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&sig->cred_guard_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x12f/0x1670 kernel/locking/mutex.c:1072 mutex_lock_killable_nested+0x16/0x20 kernel/locking/mutex.c:1102 lock_trace+0x4a/0xe0 fs/proc/base.c:384 proc_pid_syscall+0x9d/0x4b0 fs/proc/base.c:617 proc_single_show+0xf6/0x180 fs/proc/base.c:737 seq_read+0x4db/0x1130 fs/seq_file.c:229 do_loop_readv_writev fs/read_write.c:700 [inline] do_loop_readv_writev fs/read_write.c:687 [inline] do_iter_read+0x4a9/0x660 fs/read_write.c:924 vfs_readv+0x175/0x1c0 fs/read_write.c:986 do_preadv+0x1c4/0x280 fs/read_write.c:1070 __do_sys_preadv fs/read_write.c:1120 [inline] __se_sys_preadv fs/read_write.c:1115 [inline] __x64_sys_preadv+0x9a/0xf0 fs/read_write.c:1115 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (&p->lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x12f/0x1670 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 seq_read+0x71/0x1130 fs/seq_file.c:161 do_loop_readv_writev fs/read_write.c:700 [inline] do_loop_readv_writev fs/read_write.c:687 [inline] do_iter_read+0x4a9/0x660 fs/read_write.c:924 vfs_readv+0x175/0x1c0 fs/read_write.c:986 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x50c/0xac0 fs/splice.c:417 do_splice_to+0x12a/0x190 fs/splice.c:880 splice_direct_to_actor+0x31b/0x9d0 fs/splice.c:957 do_splice_direct+0x2c7/0x420 fs/splice.c:1066 do_sendfile+0x61a/0xe60 fs/read_write.c:1439 __do_sys_sendfile64 fs/read_write.c:1500 [inline] __se_sys_sendfile64 fs/read_write.c:1486 [inline] __x64_sys_sendfile64+0x1f8/0x240 fs/read_write.c:1486 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (sb_writers#5){.+.+}: percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x20b/0x360 fs/super.c:1387 sb_start_write include/linux/fs.h:1602 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:360 ovl_want_write+0x76/0xa0 fs/overlayfs/util.c:24 ovl_create_object+0x146/0x3b0 fs/overlayfs/dir.c:599 ovl_create+0x28/0x30 fs/overlayfs/dir.c:630 lookup_open+0x1332/0x1b80 fs/namei.c:3234 do_last fs/namei.c:3324 [inline] path_openat+0x1983/0x5650 fs/namei.c:3534 do_filp_open+0x26f/0x370 fs/namei.c:3564 do_sys_open+0x59a/0x7c0 fs/open.c:1063 ksys_open include/linux/syscalls.h:1298 [inline] __do_sys_creat fs/open.c:1121 [inline] __se_sys_creat fs/open.c:1119 [inline] __x64_sys_creat+0x61/0x80 fs/open.c:1119 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&ovl_i_mutex_dir_key[depth]){++++}: lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841 down_read+0x8d/0x120 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:767 [inline] lookup_slow+0x4a/0x80 fs/namei.c:1687 walk_component+0x8e5/0x26a0 fs/namei.c:1810 lookup_last fs/namei.c:2273 [inline] path_lookupat.isra.0+0x1f5/0xba0 fs/namei.c:2318 filename_lookup+0x27a/0x530 fs/namei.c:2348 kern_path+0x36/0x40 fs/namei.c:2434 create_local_trace_uprobe+0x93/0x610 kernel/trace/trace_uprobe.c:1357 perf_uprobe_init+0x1a2/0x290 kernel/trace/trace_event_perf.c:316 perf_uprobe_event_init+0x106/0x1a0 kernel/events/core.c:8503 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9770 perf_init_event kernel/events/core.c:9801 [inline] perf_event_alloc.part.0+0x20bf/0x3520 kernel/events/core.c:10074 perf_event_alloc kernel/events/core.c:10430 [inline] __do_sys_perf_event_open+0xbb5/0x2f00 kernel/events/core.c:10531 __se_sys_perf_event_open kernel/events/core.c:10420 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10420 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &ovl_i_mutex_dir_key[depth] --> &p->lock --> &sig->cred_guard_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sig->cred_guard_mutex); lock(&p->lock); lock(&sig->cred_guard_mutex); lock(&ovl_i_mutex_dir_key[depth]); *** DEADLOCK *** 2 locks held by syz-executor2/28653: #0: 00000000dda0fb96 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x9c3/0x2f00 kernel/events/core.c:10511 #1: 000000000541df91 (&pmus_srcu){....}, at: perf_event_alloc.part.0+0x10c1/0x3520 kernel/events/core.c:10070 stack backtrace: CPU: 1 PID: 28653 Comm: syz-executor2 Not tainted 4.20.0+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1224 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2350 [inline] __lock_acquire+0x3014/0x4a30 kernel/locking/lockdep.c:3338 lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841 down_read+0x8d/0x120 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:767 [inline] lookup_slow+0x4a/0x80 fs/namei.c:1687 walk_component+0x8e5/0x26a0 fs/namei.c:1810 lookup_last fs/namei.c:2273 [inline] path_lookupat.isra.0+0x1f5/0xba0 fs/namei.c:2318 filename_lookup+0x27a/0x530 fs/namei.c:2348 kern_path+0x36/0x40 fs/namei.c:2434 create_local_trace_uprobe+0x93/0x610 kernel/trace/trace_uprobe.c:1357 perf_uprobe_init+0x1a2/0x290 kernel/trace/trace_event_perf.c:316 perf_uprobe_event_init+0x106/0x1a0 kernel/events/core.c:8503 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9770 perf_init_event kernel/events/core.c:9801 [inline] perf_event_alloc.part.0+0x20bf/0x3520 kernel/events/core.c:10074 perf_event_alloc kernel/events/core.c:10430 [inline] __do_sys_perf_event_open+0xbb5/0x2f00 kernel/events/core.c:10531 __se_sys_perf_event_open kernel/events/core.c:10420 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10420 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffbd8986c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457ec9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007ffbd89876d4 R13: 00000000004c424e R14: 00000000004d73c0 R15: 00000000ffffffff kobject: 'loop0' (00000000af5a0f4d): kobject_uevent_env kobject: 'loop0' (00000000af5a0f4d): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop0' (00000000af5a0f4d): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000af5a0f4d): fill_kobj_path: path = '/devices/virtual/block/loop0' overlayfs: './file0' not a directory print_req_error: I/O error, dev loop0, sector 272 flags 801 Buffer I/O error on dev loop0, logical block 68, lost async page write print_req_error: I/O error, dev loop0, sector 276 flags 801 Buffer I/O error on dev loop0, logical block 69, lost async page write print_req_error: I/O error, dev loop0, sector 360 flags 801 Buffer I/O error on dev loop0, logical block 45, lost async page write print_req_error: I/O error, dev loop0, sector 368 flags 801 Buffer I/O error on dev loop0, logical block 92, lost async page write print_req_error: I/O error, dev loop0, sector 372 flags 801 Buffer I/O error on dev loop0, logical block 93, lost async page write kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000090353778): kobject_uevent_env kobject: 'loop1' (0000000090353778): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000af5a0f4d): kobject_uevent_env kobject: 'loop0' (00000000af5a0f4d): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000af5a0f4d): kobject_uevent_env kobject: 'loop0' (00000000af5a0f4d): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000af5a0f4d): kobject_uevent_env kobject: 'loop0' (00000000af5a0f4d): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (0000000090353778): kobject_uevent_env kobject: 'loop1' (0000000090353778): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000af5a0f4d): kobject_uevent_env kobject: 'loop0' (00000000af5a0f4d): fill_kobj_path: path = '/devices/virtual/block/loop0' print_req_error: I/O error, dev loop0, sector 512 flags 80700 kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop0' (00000000af5a0f4d): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000af5a0f4d): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop0' (00000000af5a0f4d): kobject_uevent_env kobject: 'loop0' (00000000af5a0f4d): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (0000000090353778): kobject_uevent_env kobject: 'loop1' (0000000090353778): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env print_req_error: I/O error, dev loop0, sector 64 flags 1 Buffer I/O error on dev loop0, logical block 16, lost async page write kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000af5a0f4d): kobject_uevent_env kobject: 'loop0' (00000000af5a0f4d): fill_kobj_path: path = '/devices/virtual/block/loop0' print_req_error: I/O error, dev loop0, sector 68 flags 1 Buffer I/O error on dev loop0, logical block 17, lost async page write net_ratelimit: 16 callbacks suppressed protocol 88fb is buggy, dev hsr_slave_0 Buffer I/O error on dev loop0, logical block 32, async page read protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 Buffer I/O error on dev loop0, logical block 33, async page read protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'loop0' (00000000af5a0f4d): kobject_uevent_env kobject: 'loop0' (00000000af5a0f4d): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000090353778): kobject_uevent_env kobject: 'loop1' (0000000090353778): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000090353778): kobject_uevent_env kobject: 'loop1' (0000000090353778): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000090353778): kobject_uevent_env kobject: 'loop1' (0000000090353778): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000090353778): kobject_uevent_env kobject: 'loop1' (0000000090353778): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000090353778): kobject_uevent_env kobject: 'loop1' (0000000090353778): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000090353778): kobject_uevent_env kobject: 'loop1' (0000000090353778): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready 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 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready 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 kobject: 'loop1' (0000000090353778): kobject_uevent_env kobject: 'loop1' (0000000090353778): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'nullb0' (00000000d956561c): kobject_uevent_env kobject: 'nullb0' (00000000d956561c): fill_kobj_path: path = '/devices/virtual/block/nullb0' kobject: 'nullb0' (00000000d956561c): kobject_uevent_env kobject: 'nullb0' (00000000d956561c): fill_kobj_path: path = '/devices/virtual/block/nullb0' IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' 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 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready 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 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready 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 kobject: 'loop1' (0000000090353778): kobject_uevent_env kobject: 'loop1' (0000000090353778): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'nullb0' (00000000d956561c): kobject_uevent_env kobject: 'nullb0' (00000000d956561c): fill_kobj_path: path = '/devices/virtual/block/nullb0' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000090353778): kobject_uevent_env kobject: 'loop1' (0000000090353778): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'nullb0' (00000000d956561c): kobject_uevent_env kobject: 'nullb0' (00000000d956561c): fill_kobj_path: path = '/devices/virtual/block/nullb0' kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000090353778): kobject_uevent_env kobject: 'loop1' (0000000090353778): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'tun0' (00000000ead831cc): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'nullb0' (00000000d956561c): kobject_uevent_env kobject: 'nullb0' (00000000d956561c): fill_kobj_path: path = '/devices/virtual/block/nullb0' kobject: 'tun0' (00000000ead831cc): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): kobject_uevent_env kobject: 'loop5' (00000000f08dd89f): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'tun0' (00000000ead831cc): fill_kobj_path: path = '/devices/virtual/net/tun0' kobject: 'queues' (00000000d237cdbe): kobject_add_internal: parent: 'tun0', set: '' kobject: 'queues' (00000000d237cdbe): kobject_uevent_env kobject: 'queues' (00000000d237cdbe): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (000000005ee5acf7): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (000000005ee5acf7): kobject_uevent_env kobject: 'rx-0' (000000005ee5acf7): fill_kobj_path: path = '/devices/virtual/net/tun0/queues/rx-0' kobject: 'tx-0' (000000006393f5ca): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (000000006393f5ca): kobject_uevent_env kobject: 'tx-0' (000000006393f5ca): fill_kobj_path: path = '/devices/virtual/net/tun0/queues/tx-0' IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready net_ratelimit: 31 callbacks suppressed protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready 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 caif0 may have been left with an inconsistent configuration, please check. kobject: 'tun0' (00000000a8d062ec): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'tun0' (00000000a8d062ec): kobject_uevent_env kobject: 'tun0' (00000000a8d062ec): fill_kobj_path: path = '/devices/virtual/net/tun0' kobject: 'queues' (00000000727ed58e): kobject_add_internal: parent: 'tun0', set: '' kobject: 'queues' (00000000727ed58e): kobject_uevent_env kobject: 'queues' (00000000727ed58e): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (000000000d24592e): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (000000000d24592e): kobject_uevent_env kobject: 'rx-0' (000000000d24592e): fill_kobj_path: path = '/devices/virtual/net/tun0/queues/rx-0' kobject: 'tx-0' (0000000057a2daa5): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (0000000057a2daa5): kobject_uevent_env kobject: 'tx-0' (0000000057a2daa5): fill_kobj_path: path = '/devices/virtual/net/tun0/queues/tx-0' IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready 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 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect audit: type=1804 audit(2000000927.941:331): pid=29056 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor4" name="/root/syzkaller-testdir085262966/syzkaller.9BVbI6/418/bus" dev="sda1" ino=17185 res=1 chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected kobject: 'rx-0' (000000005ee5acf7): kobject_cleanup, parent 00000000d237cdbe kobject: 'rx-0' (000000005ee5acf7): auto cleanup 'remove' event kobject: 'rx-0' (000000005ee5acf7): kobject_uevent_env kobject: 'rx-0' (000000005ee5acf7): fill_kobj_path: path = '/devices/virtual/net/tun0/queues/rx-0' kobject: 'rx-0' (000000005ee5acf7): auto cleanup kobject_del kobject: 'rx-0' (000000005ee5acf7): calling ktype release kobject: 'rx-0': free name kobject: 'tx-0' (000000006393f5ca): kobject_cleanup, parent 00000000d237cdbe audit: type=1804 audit(2000000928.061:332): pid=29058 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor4" name="/root/syzkaller-testdir085262966/syzkaller.9BVbI6/418/bus" dev="sda1" ino=17185 res=1 kobject: 'tx-0' (000000006393f5ca): auto cleanup 'remove' event kobject: 'tx-0' (000000006393f5ca): kobject_uevent_env kobject: 'tx-0' (000000006393f5ca): fill_kobj_path: path = '/devices/virtual/net/tun0/queues/tx-0' kobject: 'tx-0' (000000006393f5ca): auto cleanup kobject_del kobject: 'tx-0' (000000006393f5ca): calling ktype release kobject: 'tx-0': free name kobject: 'queues' (00000000d237cdbe): kobject_cleanup, parent (null) kobject: 'queues' (00000000d237cdbe): calling ktype release kobject: 'queues' (00000000d237cdbe): kset_release kobject: 'queues': free name kobject: 'tun0' (00000000ead831cc): kobject_uevent_env kobject: 'tun0' (00000000ead831cc): fill_kobj_path: path = '/devices/virtual/net/tun0' IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect