============================================ WARNING: possible recursive locking detected 6.16.0-rc6-next-20250714-syzkaller #0 Not tainted -------------------------------------------- syz.5.9726/10912 is trying to acquire lock: ffffe8ffffd714b8 (&pd_list->lock){+...}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] ffffe8ffffd714b8 (&pd_list->lock){+...}-{3:3}, at: padata_find_next kernel/padata.c:256 [inline] ffffe8ffffd714b8 (&pd_list->lock){+...}-{3:3}, at: padata_reorder kernel/padata.c:309 [inline] ffffe8ffffd714b8 (&pd_list->lock){+...}-{3:3}, at: padata_do_serial+0x73e/0xb80 kernel/padata.c:379 but task is already holding lock: ffffe8ffffd715b0 (&pd_list->lock){+...}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] ffffe8ffffd715b0 (&pd_list->lock){+...}-{3:3}, at: padata_reorder kernel/padata.c:300 [inline] ffffe8ffffd715b0 (&pd_list->lock){+...}-{3:3}, at: padata_do_serial+0x5b5/0xb80 kernel/padata.c:379 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 6 locks held by syz.5.9726/10912: #0: ffff8880304228f0 (&ctx->tx_lock){+.+.}-{4:4}, at: tls_sw_sendmsg+0x139/0x23d0 net/tls/tls_sw.c:1260 #1: ffff8880303baad8 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1667 [inline] #1: ffff8880303baad8 (sk_lock-AF_INET6){+.+.}-{0:0}, at: tls_sw_sendmsg+0x165/0x23d0 net/tls/tls_sw.c:1263 #2: ffffffff8e53ed00 (rcu_read_lock_bh){....}-{1:3}, at: local_bh_disable include/linux/bottom_half.h:20 [inline] #2: ffffffff8e53ed00 (rcu_read_lock_bh){....}-{1:3}, at: rcu_read_lock_bh include/linux/rcupdate.h:892 [inline] #2: ffffffff8e53ed00 (rcu_read_lock_bh){....}-{1:3}, at: padata_do_parallel+0x4b/0xab0 kernel/padata.c:188 #3: ffffffff8e53ed00 (rcu_read_lock_bh){....}-{1:3}, at: local_bh_disable include/linux/bottom_half.h:20 [inline] #3: ffffffff8e53ed00 (rcu_read_lock_bh){....}-{1:3}, at: rcu_read_lock_bh include/linux/rcupdate.h:892 [inline] #3: ffffffff8e53ed00 (rcu_read_lock_bh){....}-{1:3}, at: padata_do_parallel+0x4b/0xab0 kernel/padata.c:188 #4: ffffffff8e53ed00 (rcu_read_lock_bh){....}-{1:3}, at: local_bh_disable include/linux/bottom_half.h:20 [inline] #4: ffffffff8e53ed00 (rcu_read_lock_bh){....}-{1:3}, at: rcu_read_lock_bh include/linux/rcupdate.h:892 [inline] #4: ffffffff8e53ed00 (rcu_read_lock_bh){....}-{1:3}, at: padata_do_parallel+0x4b/0xab0 kernel/padata.c:188 #5: ffffe8ffffd715b0 (&pd_list->lock){+...}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] #5: ffffe8ffffd715b0 (&pd_list->lock){+...}-{3:3}, at: padata_reorder kernel/padata.c:300 [inline] #5: ffffe8ffffd715b0 (&pd_list->lock){+...}-{3:3}, at: padata_do_serial+0x5b5/0xb80 kernel/padata.c:379 stack backtrace: CPU: 1 UID: 0 PID: 10912 Comm: syz.5.9726 Not tainted 6.16.0-rc6-next-20250714-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_deadlock_bug+0x28b/0x2a0 kernel/locking/lockdep.c:3044 check_deadlock kernel/locking/lockdep.c:3096 [inline] validate_chain+0x1a3f/0x2140 kernel/locking/lockdep.c:3898 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] padata_find_next kernel/padata.c:256 [inline] padata_reorder kernel/padata.c:309 [inline] padata_do_serial+0x73e/0xb80 kernel/padata.c:379 padata_do_parallel+0x7b7/0xab0 kernel/padata.c:220 pcrypt_aead_encrypt+0x2f1/0x400 crypto/pcrypt.c:117 pcrypt_aead_enc+0x17/0x80 crypto/pcrypt.c:83 padata_do_parallel+0x7b7/0xab0 kernel/padata.c:220 pcrypt_aead_encrypt+0x2f1/0x400 crypto/pcrypt.c:117 pcrypt_aead_enc+0x17/0x80 crypto/pcrypt.c:83 padata_do_parallel+0x7b7/0xab0 kernel/padata.c:220 pcrypt_aead_encrypt+0x2f1/0x400 crypto/pcrypt.c:117 tls_do_encryption net/tls/tls_sw.c:582 [inline] tls_push_record+0x19c5/0x3770 net/tls/tls_sw.c:819 bpf_exec_tx_verdict+0xefb/0x15e0 net/tls/tls_sw.c:859 tls_sw_sendmsg_locked net/tls/tls_sw.c:1135 [inline] tls_sw_sendmsg+0x18db/0x23d0 net/tls/tls_sw.c:1264 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0xe5/0x270 net/socket.c:729 __sys_sendto+0x3bd/0x520 net/socket.c:2228 __do_sys_sendto net/socket.c:2235 [inline] __se_sys_sendto net/socket.c:2231 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2231 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f604598e929 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:00007f6046859038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f6045bb5fa0 RCX: 00007f604598e929 RDX: ffffffffffffff69 RSI: 0000200000000240 RDI: 0000000000000004 RBP: 00007f6045a10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008040 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6045bb5fa0 R15: 00007ffea4b0d658