============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
syz.1.768/9337 is trying to acquire lock:
ffffe8ffffc5f6c8 (&pd_list->lock){+...}-{3:3}, at: padata_do_serial+0x73e/0xb80

but task is already holding lock:
ffffe8ffffc62498 (&pd_list->lock){+...}-{3:3}, at: padata_do_serial+0x5b5/0xb80

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&pd_list->lock);
  lock(&pd_list->lock);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

13 locks held by syz.1.768/9337:
 #0: ffff888112d3f8f0 (&ctx->tx_lock){+.+.}-{4:4}, at: tls_sw_sendmsg+0x139/0x23d0
 #1: ffff888020c18fd8 (sk_lock-AF_INET6){+.+.}-{0:0}, at: tls_sw_sendmsg+0x165/0x23d0
 #2: ffffffff8e139f40 (rcu_read_lock_bh){....}-{1:3}, at: padata_do_parallel+0x4b/0xab0
 #3: ffffffff8e139f40 (rcu_read_lock_bh){....}-{1:3}, at: padata_do_parallel+0x4b/0xab0
 #4: ffffffff8e139f40 (rcu_read_lock_bh){....}-{1:3}, at: padata_do_parallel+0x4b/0xab0
 #5: ffffffff8e139f40 (rcu_read_lock_bh){....}-{1:3}, at: padata_do_parallel+0x4b/0xab0
 #6: ffffffff8e139f40 (rcu_read_lock_bh){....}-{1:3}, at: padata_do_parallel+0x4b/0xab0
 #7: ffffffff8e139f40 (rcu_read_lock_bh){....}-{1:3}, at: padata_do_parallel+0x4b/0xab0
 #8: ffffffff8e139f40 (rcu_read_lock_bh){....}-{1:3}, at: padata_do_parallel+0x4b/0xab0
 #9: ffffffff8e139f40 (rcu_read_lock_bh){....}-{1:3}, at: padata_do_parallel+0x4b/0xab0
 #10: ffffffff8e139f40 (rcu_read_lock_bh){....}-{1:3}, at: padata_do_parallel+0x4b/0xab0
 #11: ffffffff8e139f40 (rcu_read_lock_bh){....}-{1:3}, at: padata_do_parallel+0x4b/0xab0
 #12: ffffe8ffffc62498 (&pd_list->lock){+...}-{3:3}, at: padata_do_serial+0x5b5/0xb80

stack backtrace:
CPU: 0 UID: 0 PID: 9337 Comm: syz.1.768 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_deadlock_bug+0x28b/0x2a0
 validate_chain+0x1a3f/0x2140
 __lock_acquire+0xab9/0xd20
 lock_acquire+0x120/0x360
 _raw_spin_lock+0x2e/0x40
 padata_do_serial+0x73e/0xb80
 padata_do_parallel+0x7ba/0xab0
 pcrypt_aead_encrypt+0x2f1/0x400
 pcrypt_aead_enc+0x17/0x80
 padata_do_parallel+0x7ba/0xab0
 pcrypt_aead_encrypt+0x2f1/0x400
 pcrypt_aead_enc+0x17/0x80
 padata_do_parallel+0x7ba/0xab0
 pcrypt_aead_encrypt+0x2f1/0x400
 pcrypt_aead_enc+0x17/0x80
 padata_do_parallel+0x7ba/0xab0
 pcrypt_aead_encrypt+0x2f1/0x400
 pcrypt_aead_enc+0x17/0x80
 padata_do_parallel+0x7ba/0xab0
 pcrypt_aead_encrypt+0x2f1/0x400
 pcrypt_aead_enc+0x17/0x80
 padata_do_parallel+0x7ba/0xab0
 pcrypt_aead_encrypt+0x2f1/0x400
 pcrypt_aead_enc+0x17/0x80
 padata_do_parallel+0x7ba/0xab0
 pcrypt_aead_encrypt+0x2f1/0x400
 pcrypt_aead_enc+0x17/0x80
 padata_do_parallel+0x7ba/0xab0
 pcrypt_aead_encrypt+0x2f1/0x400
 pcrypt_aead_enc+0x17/0x80
 padata_do_parallel+0x7ba/0xab0
 pcrypt_aead_encrypt+0x2f1/0x400
 pcrypt_aead_enc+0x17/0x80
 padata_do_parallel+0x7ba/0xab0
 pcrypt_aead_encrypt+0x2f1/0x400
 tls_push_record+0x19c5/0x3770
 bpf_exec_tx_verdict+0xefb/0x15e0
 tls_sw_sendmsg+0x18db/0x23d0
 __sock_sendmsg+0xe5/0x270
 sock_write_iter+0x258/0x330
 do_iter_readv_writev+0x61c/0x8b0
 vfs_writev+0x31a/0x960
 do_writev+0x14d/0x2d0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fed9a38ebe9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fed9b226038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007fed9a5c5fa0 RCX: 00007fed9a38ebe9
RDX: 0000000000000001 RSI: 0000200000000080 RDI: 0000000000000004
RBP: 00007fed9a411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fed9a5c6038 R14: 00007fed9a5c5fa0 R15: 00007ffe741ddfd8
 </TASK>
