================================ WARNING: inconsistent lock state 5.9.0-rc3-syzkaller #0 Not tainted -------------------------------- inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage. syz-executor.0/23152 [HC0[0]:SC0[0]:HE1:SE1] takes: ffffffff89c56b98 (padata_works_lock){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] ffffffff89c56b98 (padata_works_lock){+.?.}-{2:2}, at: padata_do_parallel+0x4d7/0x860 kernel/padata.c:220 {IN-SOFTIRQ-W} state was registered at: lock_acquire+0x1f3/0xae0 kernel/locking/lockdep.c:5006 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] padata_do_parallel+0x4d7/0x860 kernel/padata.c:220 pcrypt_aead_encrypt+0x39f/0x4d0 crypto/pcrypt.c:115 crypto_aead_encrypt+0xaa/0xf0 crypto/aead.c:94 tipc_aead_encrypt net/tipc/crypto.c:742 [inline] tipc_crypto_xmit+0x17a9/0x2690 net/tipc/crypto.c:1613 tipc_bearer_xmit_skb+0x180/0x3f0 net/tipc/bearer.c:523 tipc_disc_timeout+0x84b/0xc90 net/tipc/discover.c:334 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413 expire_timers kernel/time/timer.c:1458 [inline] __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755 __run_timers kernel/time/timer.c:1736 [inline] run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768 __do_softirq+0x1f7/0xa91 kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x235/0x280 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline] kmem_cache_free.part.0+0x90/0x1e0 mm/slab.c:3694 sk_prot_free net/core/sock.c:1706 [inline] __sk_destruct+0x550/0x860 net/core/sock.c:1793 sk_destruct+0xbd/0xe0 net/core/sock.c:1808 __sk_free+0xef/0x3d0 net/core/sock.c:1819 sk_free+0x78/0xa0 net/core/sock.c:1830 sock_put include/net/sock.h:1781 [inline] tcp_close+0xb43/0x11f0 net/ipv4/tcp.c:2580 inet_release+0x12e/0x280 net/ipv4/af_inet.c:431 __sock_release+0xcd/0x280 net/socket.c:596 sock_close+0x18/0x20 net/socket.c:1277 __fput+0x285/0x920 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:141 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:140 [inline] exit_to_user_mode_prepare+0x1e1/0x200 kernel/entry/common.c:167 syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:242 entry_SYSCALL_64_after_hwframe+0x44/0xa9 irq event stamp: 451 hardirqs last enabled at (451): [] __local_bh_enable_ip+0x10f/0x1f0 kernel/softirq.c:200 hardirqs last disabled at (449): [] __local_bh_enable_ip+0x154/0x1f0 kernel/softirq.c:177 softirqs last enabled at (450): [] rcu_read_unlock_bh include/linux/rcupdate.h:719 [inline] softirqs last enabled at (450): [] padata_do_parallel+0x49d/0x860 kernel/padata.c:218 softirqs last disabled at (448): [] padata_do_parallel+0x37/0x860 kernel/padata.c:183 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(padata_works_lock); lock(padata_works_lock); *** DEADLOCK *** 4 locks held by syz-executor.0/23152: #0: ffffffff8a84af70 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:741 #1: ffffffff8a84b028 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8a84b028 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x732/0x980 net/netlink/genetlink.c:729 #2: ffffffff8a7ecf08 (rtnl_mutex){+.+.}-{3:3}, at: tipc_nl_bearer_enable+0x13/0x30 net/tipc/bearer.c:1002 #3: ffffffff89bd6c80 (rcu_read_lock){....}-{1:2}, at: buf_msg net/tipc/msg.h:198 [inline] #3: ffffffff89bd6c80 (rcu_read_lock){....}-{1:2}, at: tipc_bearer_xmit_skb+0x8c/0x3f0 net/tipc/bearer.c:516 stack backtrace: CPU: 1 PID: 23152 Comm: syz-executor.0 Not tainted 5.9.0-rc3-syzkaller #0 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+0x198/0x1fd lib/dump_stack.c:118 print_usage_bug kernel/locking/lockdep.c:4020 [inline] valid_state kernel/locking/lockdep.c:3361 [inline] mark_lock_irq kernel/locking/lockdep.c:3560 [inline] mark_lock.cold+0x7a/0x7f kernel/locking/lockdep.c:4006 mark_usage kernel/locking/lockdep.c:3923 [inline] __lock_acquire+0x876/0x5570 kernel/locking/lockdep.c:4380 lock_acquire+0x1f3/0xae0 kernel/locking/lockdep.c:5006 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] padata_do_parallel+0x4d7/0x860 kernel/padata.c:220 pcrypt_aead_encrypt+0x39f/0x4d0 crypto/pcrypt.c:115 crypto_aead_encrypt+0xaa/0xf0 crypto/aead.c:94 tipc_aead_encrypt net/tipc/crypto.c:742 [inline] tipc_crypto_xmit+0x17a9/0x2690 net/tipc/crypto.c:1613 tipc_bearer_xmit_skb+0x180/0x3f0 net/tipc/bearer.c:523 tipc_enable_bearer+0xb1d/0xdc0 net/tipc/bearer.c:331 __tipc_nl_bearer_enable+0x2bf/0x390 net/tipc/bearer.c:995 tipc_nl_bearer_enable+0x1e/0x30 net/tipc/bearer.c:1003 genl_family_rcv_msg_doit net/netlink/genetlink.c:669 [inline] genl_family_rcv_msg net/netlink/genetlink.c:714 [inline] genl_rcv_msg+0x61d/0x980 net/netlink/genetlink.c:731 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2470 genl_rcv+0x24/0x40 net/netlink/genetlink.c:742 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2353 ___sys_sendmsg+0xf3/0x170 net/socket.c:2407 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2440 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fd8a45b8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002ca00 RCX: 000000000045d5b9 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffd8bb6b9af R14: 00007fd8a45b99c0 R15: 000000000118cf4c tipc: Enabled bearer , priority 10