IPVS: set_ctl: invalid protocol: 0 0.0.0.0:0 ====================================================== WARNING: possible circular locking dependency detected 4.14.275-syzkaller #0 Not tainted ------------------------------------------------------ ADFS-fs: unrecognised mount option "--" or missing value kworker/u4:5/7957 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [] do_strp_work net/strparser/strparser.c:415 [inline] (sk_lock-AF_INET){+.+.}, at: [] strp_work+0x3e/0x100 net/strparser/strparser.c:434 but task is already holding lock: ((&strp->work)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 which lock already depends on the new lock. IPVS: set_ctl: invalid protocol: 0 0.0.0.0:0 the existing dependency chain (in reverse order) is: -> #1 ((&strp->work)){+.+.}: flush_work+0xad/0x770 kernel/workqueue.c:2890 __cancel_work_timer+0x321/0x460 kernel/workqueue.c:2965 strp_done+0x53/0xd0 net/strparser/strparser.c:519 kcm_attach net/kcm/kcmsock.c:1429 [inline] kcm_attach_ioctl net/kcm/kcmsock.c:1490 [inline] kcm_ioctl+0x828/0xfb0 net/kcm/kcmsock.c:1701 sock_do_ioctl net/socket.c:974 [inline] sock_ioctl+0x2cc/0x4c0 net/socket.c:1071 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #0 (sk_lock-AF_INET){+.+.}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 lock_sock_nested+0xb7/0x100 net/core/sock.c:2813 do_strp_work net/strparser/strparser.c:415 [inline] strp_work+0x3e/0x100 net/strparser/strparser.c:434 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock((&strp->work)); lock(sk_lock-AF_INET); lock((&strp->work)); lock(sk_lock-AF_INET); *** DEADLOCK *** 2 locks held by kworker/u4:5/7957: #0: ("%s""kstrp"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: ((&strp->work)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 stack backtrace: CPU: 1 PID: 7957 Comm: kworker/u4:5 Not tainted 4.14.275-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: kstrp strp_work Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 lock_sock_nested+0xb7/0x100 net/core/sock.c:2813 do_strp_work net/strparser/strparser.c:415 [inline] strp_work+0x3e/0x100 net/strparser/strparser.c:434 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 IPVS: set_ctl: invalid protocol: 0 0.0.0.0:0 IPVS: set_ctl: invalid protocol: 25624 15.0.0.0:0 IPVS: set_ctl: invalid protocol: 0 0.0.0.0:0 IPVS: set_ctl: invalid protocol: 0 0.0.0.0:0 IPVS: set_ctl: invalid protocol: 0 0.0.0.0:0 IPVS: set_ctl: invalid protocol: 0 0.0.0.0:0 IPVS: set_ctl: invalid protocol: 0 0.0.0.0:0 IPVS: set_ctl: invalid protocol: 0 0.0.0.0:0 ADFS-fs: unrecognised mount option "--" or missing value ADFS-fs: unrecognised mount option "--" or missing value ADFS-fs: unrecognised mount option "--" or missing value IPVS: set_ctl: invalid protocol: 0 0.0.0.0:0 ISO 9660 Extensions: Microsoft Joliet Level 3 ISO 9660 Extensions: Microsoft Joliet Level 3 IPVS: set_ctl: invalid protocol: 0 0.0.0.0:0 nla_parse: 9 callbacks suppressed netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 144 bytes leftover after parsing attributes in process `syz-executor.1'. print_req_error: I/O error, dev loop5, sector 0 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 144 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. print_req_error: I/O error, dev loop1, sector 0 print_req_error: I/O error, dev loop5, sector 0 print_req_error: I/O error, dev loop1, sector 0 print_req_error: I/O error, dev loop5, sector 0 print_req_error: I/O error, dev loop1, sector 24 print_req_error: I/O error, dev loop5, sector 24 print_req_error: I/O error, dev loop1, sector 0 print_req_error: I/O error, dev loop5, sector 0 print_req_error: I/O error, dev loop5, sector 0 netlink: 144 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. ISO 9660 Extensions: Microsoft Joliet Level 0 ISOFS: unable to read i-node block isofs_fill_super: get root inode failed net_ratelimit: 58 callbacks suppressed ip6_tables: ip6tables: counters copy to user failed while replacing table ISO 9660 Extensions: Microsoft Joliet Level 0 ip6_tables: ip6tables: counters copy to user failed while replacing table ISOFS: unable to read i-node block isofs_fill_super: get root inode failed ISO 9660 Extensions: Microsoft Joliet Level 3 ip6_tables: ip6tables: counters copy to user failed while replacing table ip6_tables: ip6tables: counters copy to user failed while replacing table ISO 9660 Extensions: Microsoft Joliet Level 0 ISOFS: unable to read i-node block isofs_fill_super: get root inode failed ISO 9660 Extensions: Microsoft Joliet Level 3 ip6_tables: ip6tables: counters copy to user failed while replacing table ISO 9660 Extensions: Microsoft Joliet Level 3 ip6_tables: ip6tables: counters copy to user failed while replacing table ip6_tables: ip6tables: counters copy to user failed while replacing table ip6_tables: ip6tables: counters copy to user failed while replacing table ip6_tables: ip6tables: counters copy to user failed while replacing table ip6_tables: ip6tables: counters copy to user failed while replacing table nla_parse: 87 callbacks suppressed netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed.