syzbot

BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1405
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1180, name: kworker/u4:6
4 locks held by kworker/u4:6/1180:
 #0: ffff88802897e138 ((wq_completion)bat_events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff88802897e138 ((wq_completion)bat_events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
 #0: ffff88802897e138 ((wq_completion)bat_events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
 #0: ffff88802897e138 ((wq_completion)bat_events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
 #0: ffff88802897e138 ((wq_completion)bat_events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0: ffff88802897e138 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2247
 #1: ffffc90004ecfda8 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2251
 #2: ffffffff8bf79620 (rcu_read_lock){....}-{1:2}, at: batadv_nc_process_nc_paths.part.0+0xb1/0x3b0 net/batman-adv/network-coding.c:680
 #3: ffffffff8bf79500 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2547 [inline]
 #3: ffffffff8bf79500 (rcu_callback){....}-{0:0}, at: rcu_core+0x737/0x13b0 kernel/rcu/tree.c:2793
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 PID: 1180 Comm: kworker/u4:6 Not tainted 5.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 ___might_sleep.cold+0x1f1/0x237 kernel/sched/core.c:8337
 down_write+0x6e/0x150 kernel/locking/rwsem.c:1405
 crypto_drop_spawn crypto/algapi.c:709 [inline]
 crypto_drop_spawn+0x4b/0x2b0 crypto/algapi.c:704
 crypto_drop_aead include/crypto/internal/aead.h:90 [inline]
 pcrypt_free+0x15/0x80 crypto/pcrypt.c:206
 crypto_free_instance crypto/algapi.c:68 [inline]
 crypto_destroy_instance+0x7a/0xc0 crypto/algapi.c:76
 crypto_alg_put crypto/internal.h:108 [inline]
 crypto_alg_put crypto/internal.h:105 [inline]
 crypto_mod_put+0xd3/0x100 crypto/api.c:45
 crypto_destroy_tfm crypto/api.c:573 [inline]
 crypto_destroy_tfm+0xdb/0x240 crypto/api.c:561
 crypto_free_aead include/crypto/aead.h:193 [inline]
 tipc_aead_free+0x398/0x660 net/tipc/crypto.c:422
 rcu_do_batch kernel/rcu/tree.c:2558 [inline]
 rcu_core+0x7ab/0x13b0 kernel/rcu/tree.c:2793
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:559
 invoke_softirq kernel/softirq.c:433 [inline]
 __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:check_preemption_disabled+0x2a/0x150 lib/smp_processor_id.c:16
Code: 41 56 41 55 49 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 1d 7a ea 76 65 8b 1d 6e d4 ea 76 81 e3 ff ff ff 7f 31 ff <89> de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b 5d 41
RSP: 0018:ffffc90004ecfbd8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff888017ed3880 RSI: ffffffff89c2e880 RDI: 0000000000000000
RBP: ffffffff89c2e8c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff88b6951d R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff89c2e880 R14: ffff88803029cc00 R15: 000000000000001f
 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:325 [inline]
 rcu_is_watching+0xe/0xc0 kernel/rcu/tree.c:1168
 rcu_read_unlock include/linux/rcupdate.h:707 [inline]
 batadv_nc_process_nc_paths.part.0+0x304/0x3b0 net/batman-adv/network-coding.c:695
 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:675 [inline]
 batadv_nc_worker+0xb90/0xe50 net/batman-adv/network-coding.c:731
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2276
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2422
 kthread+0x3b1/0x4a0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

=============================
[ BUG: Invalid wait context ]
5.13.0-rc6-syzkaller #0 Tainted: G        W        
-----------------------------
kworker/u4:6/1180 is trying to lock:
ffffffff8c74bef0 (crypto_alg_sem){++++}-{3:3}, at: crypto_drop_spawn crypto/algapi.c:709 [inline]
ffffffff8c74bef0 (crypto_alg_sem){++++}-{3:3}, at: crypto_drop_spawn+0x4b/0x2b0 crypto/algapi.c:704
other info that might help us debug this:
context-{2:2}
4 locks held by kworker/u4:6/1180:
 #0: ffff88802897e138 ((wq_completion)bat_events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff88802897e138 ((wq_completion)bat_events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
 #0: ffff88802897e138 ((wq_completion)bat_events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
 #0: ffff88802897e138 ((wq_completion)bat_events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
 #0: ffff88802897e138 ((wq_completion)bat_events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0: ffff88802897e138 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2247
 #1: ffffc90004ecfda8 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2251
 #2: ffffffff8bf79620 (rcu_read_lock){....}-{1:2}, at: batadv_nc_process_nc_paths.part.0+0xb1/0x3b0 net/batman-adv/network-coding.c:680
 #3: ffffffff8bf79500 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2547 [inline]
 #3: ffffffff8bf79500 (rcu_callback){....}-{0:0}, at: rcu_core+0x737/0x13b0 kernel/rcu/tree.c:2793
stack backtrace:
CPU: 1 PID: 1180 Comm: kworker/u4:6 Tainted: G        W         5.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4553 [inline]
 check_wait_context kernel/locking/lockdep.c:4614 [inline]
 __lock_acquire.cold+0xc8/0x3b4 kernel/locking/lockdep.c:4852
 lock_acquire kernel/locking/lockdep.c:5512 [inline]
 lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
 down_write+0x92/0x150 kernel/locking/rwsem.c:1406
 crypto_drop_spawn crypto/algapi.c:709 [inline]
 crypto_drop_spawn+0x4b/0x2b0 crypto/algapi.c:704
 crypto_drop_aead include/crypto/internal/aead.h:90 [inline]
 pcrypt_free+0x15/0x80 crypto/pcrypt.c:206
 crypto_free_instance crypto/algapi.c:68 [inline]
 crypto_destroy_instance+0x7a/0xc0 crypto/algapi.c:76
 crypto_alg_put crypto/internal.h:108 [inline]
 crypto_alg_put crypto/internal.h:105 [inline]
 crypto_mod_put+0xd3/0x100 crypto/api.c:45
 crypto_destroy_tfm crypto/api.c:573 [inline]
 crypto_destroy_tfm+0xdb/0x240 crypto/api.c:561
 crypto_free_aead include/crypto/aead.h:193 [inline]
 tipc_aead_free+0x398/0x660 net/tipc/crypto.c:422
 rcu_do_batch kernel/rcu/tree.c:2558 [inline]
 rcu_core+0x7ab/0x13b0 kernel/rcu/tree.c:2793
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:559
 invoke_softirq kernel/softirq.c:433 [inline]
 __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:check_preemption_disabled+0x2a/0x150 lib/smp_processor_id.c:16
Code: 41 56 41 55 49 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 1d 7a ea 76 65 8b 1d 6e d4 ea 76 81 e3 ff ff ff 7f 31 ff <89> de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b 5d 41
RSP: 0018:ffffc90004ecfbd8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff888017ed3880 RSI: ffffffff89c2e880 RDI: 0000000000000000
RBP: ffffffff89c2e8c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff88b6951d R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff89c2e880 R14: ffff88803029cc00 R15: 000000000000001f
 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:325 [inline]
 rcu_is_watching+0xe/0xc0 kernel/rcu/tree.c:1168
 rcu_read_unlock include/linux/rcupdate.h:707 [inline]
 batadv_nc_process_nc_paths.part.0+0x304/0x3b0 net/batman-adv/network-coding.c:695
 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:675 [inline]
 batadv_nc_worker+0xb90/0xe50 net/batman-adv/network-coding.c:731
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2276
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2422
 kthread+0x3b1/0x4a0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294