------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.7.0-rc4-next-20231207-syzkaller #0 Not tainted
------------------------------------------------------
kworker/u4:5/63 is trying to acquire lock:
ffffffff8d199458 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0x12/0x70 kernel/locking/semaphore.c:139
but task is already holding lock:
ffffffff8dc75078 (pool_rwlock){----}-{2:2}, at: stack_depot_put lib/stackdepot.c:621 [inline]
ffffffff8dc75078 (pool_rwlock){----}-{2:2}, at: stack_depot_put+0x24/0x110 lib/stackdepot.c:613
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (pool_rwlock){----}-{2:2}:
__raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
_raw_read_lock_irqsave+0x46/0x90 kernel/locking/spinlock.c:236
stack_depot_save_flags+0x169/0x740 lib/stackdepot.c:508
kasan_save_stack+0x42/0x50 mm/kasan/common.c:48
__kasan_record_aux_stack+0xc2/0xd0 mm/kasan/generic.c:517
task_work_add+0x88/0x2a0 kernel/task_work.c:48
task_tick_numa kernel/sched/fair.c:3512 [inline]
task_tick_fair+0x5a5/0xc30 kernel/sched/fair.c:12599
scheduler_tick+0x210/0x650 kernel/sched/core.c:5674
update_process_times+0x19e/0x220 kernel/time/timer.c:2076
tick_sched_handle+0x8e/0x170 kernel/time/tick-sched.c:255
tick_nohz_highres_handler+0xe9/0x110 kernel/time/tick-sched.c:1516
__run_hrtimer kernel/time/hrtimer.c:1688 [inline]
__hrtimer_run_queues+0x654/0xc20 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
__sysvec_apic_timer_interrupt+0x10c/0x410 arch/x86/kernel/apic/apic.c:1082
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
stack_access_ok+0x4/0x270 arch/x86/kernel/unwind_orc.c:389
deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline]
unwind_next_frame+0x1a92/0x2390 arch/x86/kernel/unwind_orc.c:648
arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x15e/0x1f0 mm/page_owner.c:130
__set_page_owner+0x1f/0x60 mm/page_owner.c:196
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2d0/0x350 mm/page_alloc.c:1540
prep_new_page mm/page_alloc.c:1547 [inline]
get_page_from_freelist+0xa19/0x3740 mm/page_alloc.c:3355
__alloc_pages+0x22e/0x2410 mm/page_alloc.c:4611
alloc_pages_mpol+0x258/0x5f0 mm/mempolicy.c:2133
folio_alloc+0x1e/0xe0 mm/mempolicy.c:2211
filemap_alloc_folio+0x3b6/0x490 mm/filemap.c:974
page_cache_ra_unbounded+0x1aa/0x5e0 mm/readahead.c:247
do_page_cache_ra mm/readahead.c:299 [inline]
page_cache_ra_order+0x7d7/0xaa0 mm/readahead.c:544
ondemand_readahead+0x493/0x1130 mm/readahead.c:666
page_cache_async_ra mm/readahead.c:715 [inline]
page_cache_async_ra+0x123/0x150 mm/readahead.c:697
filemap_readahead mm/filemap.c:2472 [inline]
filemap_get_pages+0x359/0x1830 mm/filemap.c:2513
filemap_read+0x39b/0xcf0 mm/filemap.c:2593
generic_file_read_iter+0x346/0x450 mm/filemap.c:2772
ext4_file_read_iter+0x1dc/0x6c0 fs/ext4/file.c:147
__kernel_read+0x300/0x870 fs/read_write.c:428
integrity_kernel_read+0x7f/0xb0 security/integrity/iint.c:221
ima_calc_file_hash_tfm+0x2c5/0x3d0 security/integrity/ima/ima_crypto.c:485
ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
ima_calc_file_hash+0x1c6/0x4a0 security/integrity/ima/ima_crypto.c:573
ima_collect_measurement+0x85e/0xa20 security/integrity/ima/ima_api.c:290
process_measurement+0xe92/0x2260 security/integrity/ima/ima_main.c:359
ima_file_check+0xc1/0x100 security/integrity/ima/ima_main.c:557
do_open fs/namei.c:3633 [inline]
path_openat+0x17a3/0x2990 fs/namei.c:3788
do_filp_open+0x1dc/0x430 fs/namei.c:3815
do_sys_openat2+0x176/0x1e0 fs/open.c:1441
do_sys_open fs/open.c:1456 [inline]
__do_sys_openat fs/open.c:1472 [inline]
__se_sys_openat fs/open.c:1467 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1467
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x62/0x6a
-> #2 (&rq->__lock){-.-.}-{2:2}:
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558
raw_spin_rq_lock kernel/sched/sched.h:1385 [inline]
rq_lock kernel/sched/sched.h:1699 [inline]
task_fork_fair+0x70/0x240 kernel/sched/fair.c:12619
sched_cgroup_fork+0x3cf/0x510 kernel/sched/core.c:4835
copy_process+0x6a38/0x9770 kernel/fork.c:2601
kernel_clone+0xfd/0x940 kernel/fork.c:2899
user_mode_thread+0xb4/0xf0 kernel/fork.c:2977
rest_init+0x27/0x2b0 init/main.c:695
arch_call_rest_init+0x13/0x30 init/main.c:827
start_kernel+0x39e/0x480 init/main.c:1072
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:555
x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:536
secondary_startup_64_no_verify+0x166/0x16b
-> #1 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:522 [inline]
try_to_wake_up+0x9a/0x13d0 kernel/sched/core.c:4252
up+0x79/0xb0 kernel/locking/semaphore.c:191
__up_console_sem kernel/printk/printk.c:340 [inline]
__console_unlock kernel/printk/printk.c:2706 [inline]
console_unlock+0x1cf/0x260 kernel/printk/printk.c:3038
vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2303
vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2328
_btrfs_printk+0x211/0x520 fs/btrfs/messages.c:248
btrfs_put_super+0x66/0x80 fs/btrfs/super.c:74
generic_shutdown_super+0x161/0x3d0 fs/super.c:652
kill_anon_super+0x3a/0x60 fs/super.c:1230
btrfs_kill_super+0x3b/0x50 fs/btrfs/super.c:2082
deactivate_locked_super+0xbc/0x1a0 fs/super.c:477
deactivate_super+0xde/0x100 fs/super.c:510
cleanup_mnt+0x222/0x450 fs/namespace.c:1267
task_work_run+0x14c/0x240 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x214/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:88
entry_SYSCALL_64_after_hwframe+0x62/0x6a
-> #0 ((console_sem).lock){-.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x246e/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5719
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
down_trylock+0x12/0x70 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x40/0x140 kernel/printk/printk.c:323
console_trylock+0x73/0x130 kernel/printk/printk.c:2659
console_trylock_spinning kernel/printk/printk.c:1923 [inline]
vprintk_emit+0x162/0x5f0 kernel/printk/printk.c:2302
vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2328
__warn_printk+0x158/0x350 kernel/panic.c:721
refcount_warn_saturate+0x149/0x210 lib/refcount.c:28
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
stack_depot_put lib/stackdepot.c:627 [inline]
stack_depot_put+0xe4/0x110 lib/stackdepot.c:613
__kasan_record_aux_stack+0xb3/0xd0 mm/kasan/generic.c:515
insert_work+0x38/0x230 kernel/workqueue.c:1653
__queue_work+0x633/0x11d0 kernel/workqueue.c:1802
__queue_delayed_work+0x1bf/0x270 kernel/workqueue.c:1953
mod_delayed_work_on+0xcc/0x1a0 kernel/workqueue.c:2027
kblockd_mod_delayed_work_on+0x29/0x40 block/blk-core.c:1046
blk_flush_complete_seq+0x3ad/0x10c0 block/blk-flush.c:194
flush_end_io+0x6f8/0xc80 block/blk-flush.c:264
__blk_mq_end_request+0x248/0x4f0 block/blk-mq.c:1046
scsi_end_request+0x444/0x9a0 drivers/scsi/scsi_lib.c:572
scsi_io_completion+0x251/0x14c0 drivers/scsi/scsi_lib.c:975
scsi_complete+0x124/0x250 drivers/scsi/scsi_lib.c:1437
blk_complete_reqs+0xb2/0xf0 block/blk-mq.c:1131
__do_softirq+0x216/0x8d5 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb5/0x120 kernel/softirq.c:644
common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:247
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636
lock_acquire+0x1f2/0x530 kernel/locking/lockdep.c:5722
rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
rcu_read_lock include/linux/rcupdate.h:744 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x16e/0x10e0 net/batman-adv/network-coding.c:719
process_one_work+0x8a4/0x15f0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b6/0x1290 kernel/workqueue.c:2787
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
other info that might help us debug this:
Chain exists of:
(console_sem).lock --> &rq->__lock --> pool_rwlock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(pool_rwlock);
lock(&rq->__lock);
lock(pool_rwlock);
lock((console_sem).lock);
*** DEADLOCK ***
7 locks held by kworker/u4:5/63:
#0: ffff88814bb45138 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_one_work+0x78c/0x15f0 kernel/workqueue.c:2608
#1: ffffc900015e7d80 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x7f6/0x15f0 kernel/workqueue.c:2609
#2: ffffffff8d1ab9a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#2: ffffffff8d1ab9a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:744 [inline]
#2: ffffffff8d1ab9a0 (rcu_read_lock){....}-{1:2}, at: batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
#2: ffffffff8d1ab9a0 (rcu_read_lock){....}-{1:2}, at: batadv_nc_worker+0x168/0x10e0 net/batman-adv/network-coding.c:719
#3: ffff8880167d6c18 (&fq->mq_flush_lock){..-.}-{2:2}, at: flush_end_io+0xcb/0xc80 block/blk-flush.c:226
#4: ffffffff8d1ab9a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#4: ffffffff8d1ab9a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:744 [inline]
#4: ffffffff8d1ab9a0 (rcu_read_lock){....}-{1:2}, at: __queue_work+0xf2/0x11d0 kernel/workqueue.c:1730
#5: ffff8880b993c2f8 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x38e/0x11d0 kernel/workqueue.c:1763
#6: ffffffff8dc75078 (pool_rwlock){----}-{2:2}, at: stack_depot_put lib/stackdepot.c:621 [inline]
#6: ffffffff8dc75078 (pool_rwlock){----}-{2:2}, at: stack_depot_put+0x24/0x110 lib/stackdepot.c:613
stack backtrace:
CPU: 1 PID: 63 Comm: kworker/u4:5 Not tainted 6.7.0-rc4-next-20231207-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: bat_events batadv_nc_worker
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
check_noncircular+0x316/0x400 kernel/locking/lockdep.c:2187
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x246e/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5719
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
down_trylock+0x12/0x70 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x40/0x140 kernel/printk/printk.c:323
console_trylock+0x73/0x130 kernel/printk/printk.c:2659
console_trylock_spinning kernel/printk/printk.c:1923 [inline]
vprintk_emit+0x162/0x5f0 kernel/printk/printk.c:2302
vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2328
__warn_printk+0x158/0x350 kernel/panic.c:721
refcount_warn_saturate+0x149/0x210 lib/refcount.c:28
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
stack_depot_put lib/stackdepot.c:627 [inline]
stack_depot_put+0xe4/0x110 lib/stackdepot.c:613
__kasan_record_aux_stack+0xb3/0xd0 mm/kasan/generic.c:515
insert_work+0x38/0x230 kernel/workqueue.c:1653
__queue_work+0x633/0x11d0 kernel/workqueue.c:1802
__queue_delayed_work+0x1bf/0x270 kernel/workqueue.c:1953
mod_delayed_work_on+0xcc/0x1a0 kernel/workqueue.c:2027
kblockd_mod_delayed_work_on+0x29/0x40 block/blk-core.c:1046
blk_flush_complete_seq+0x3ad/0x10c0 block/blk-flush.c:194
flush_end_io+0x6f8/0xc80 block/blk-flush.c:264
__blk_mq_end_request+0x248/0x4f0 block/blk-mq.c:1046
scsi_end_request+0x444/0x9a0 drivers/scsi/scsi_lib.c:572
scsi_io_completion+0x251/0x14c0 drivers/scsi/scsi_lib.c:975
scsi_complete+0x124/0x250 drivers/scsi/scsi_lib.c:1437
blk_complete_reqs+0xb2/0xf0 block/blk-mq.c:1131
__do_softirq+0x216/0x8d5 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb5/0x120 kernel/softirq.c:644
common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:247
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636
RIP: 0010:lock_acquire+0x1f2/0x530 kernel/locking/lockdep.c:5722
Code: c1 05 7a 05 9a 7e 83 f8 01 0f 85 c4 02 00 00 9c 58 f6 c4 02 0f 85 af 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900015e7ab8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920002bcf59 RCX: 00000000ebc580f0
RDX: 0000000000000001 RSI: ffffffff8accbf20 RDI: ffffffff8b2f2b40
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff24257e8
R10: ffffffff9212bf47 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8d1ab9a0 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
rcu_read_lock include/linux/rcupdate.h:744 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x16e/0x10e0 net/batman-adv/network-coding.c:719
process_one_work+0x8a4/0x15f0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b6/0x1290 kernel/workqueue.c:2787
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 63 at lib/refcount.c:28 refcount_warn_saturate+0x14a/0x210 lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 63 Comm: kworker/u4:5 Not tainted 6.7.0-rc4-next-20231207-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:refcount_warn_saturate+0x14a/0x210 lib/refcount.c:28
Code: ff 89 de e8 58 b6 22 fd 84 db 0f 85 66 ff ff ff e8 1b bb 22 fd c6 05 32 25 be 0a 01 90 48 c7 c7 00 ce 2e 8b e8 67 ac e8 fc 90 <0f> 0b 90 90 e9 43 ff ff ff e8 f8 ba 22 fd 0f b6 1d 0d 25 be 0a 31
RSP: 0018:ffffc900001f0a98 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff814e05d9
RDX: ffff888015385940 RSI: ffffffff814e05e6 RDI: 0000000000000001
RBP: ffff888144684abc R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 646e75203a745f74 R12: ffff88801828e8c0
R13: ffff888018ab1800 R14: ffff888018ab185c R15: ffff8880b993c340
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32129000 CR3: 0000000028ac1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000006
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
stack_depot_put lib/stackdepot.c:627 [inline]
stack_depot_put+0xe4/0x110 lib/stackdepot.c:613
__kasan_record_aux_stack+0xb3/0xd0 mm/kasan/generic.c:515
insert_work+0x38/0x230 kernel/workqueue.c:1653
__queue_work+0x633/0x11d0 kernel/workqueue.c:1802
__queue_delayed_work+0x1bf/0x270 kernel/workqueue.c:1953
mod_delayed_work_on+0xcc/0x1a0 kernel/workqueue.c:2027
kblockd_mod_delayed_work_on+0x29/0x40 block/blk-core.c:1046
blk_flush_complete_seq+0x3ad/0x10c0 block/blk-flush.c:194
flush_end_io+0x6f8/0xc80 block/blk-flush.c:264
__blk_mq_end_request+0x248/0x4f0 block/blk-mq.c:1046
scsi_end_request+0x444/0x9a0 drivers/scsi/scsi_lib.c:572
scsi_io_completion+0x251/0x14c0 drivers/scsi/scsi_lib.c:975
scsi_complete+0x124/0x250 drivers/scsi/scsi_lib.c:1437
blk_complete_reqs+0xb2/0xf0 block/blk-mq.c:1131
__do_softirq+0x216/0x8d5 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb5/0x120 kernel/softirq.c:644
common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:247
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636
RIP: 0010:lock_acquire+0x1f2/0x530 kernel/locking/lockdep.c:5722
Code: c1 05 7a 05 9a 7e 83 f8 01 0f 85 c4 02 00 00 9c 58 f6 c4 02 0f 85 af 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900015e7ab8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920002bcf59 RCX: 00000000ebc580f0
RDX: 0000000000000001 RSI: ffffffff8accbf20 RDI: ffffffff8b2f2b40
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff24257e8
R10: ffffffff9212bf47 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8d1ab9a0 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
rcu_read_lock include/linux/rcupdate.h:744 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x16e/0x10e0 net/batman-adv/network-coding.c:719
process_one_work+0x8a4/0x15f0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b6/0x1290 kernel/workqueue.c:2787
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
----------------
Code disassembly (best guess):
0: c1 05 7a 05 9a 7e 83 roll $0x83,0x7e9a057a(%rip) # 0x7e9a0581
7: f8 clc
8: 01 0f add %ecx,(%rdi)
a: 85 c4 test %eax,%esp
c: 02 00 add (%rax),%al
e: 00 9c 58 f6 c4 02 0f add %bl,0xf02c4f6(%rax,%rbx,2)
15: 85 af 02 00 00 48 test %ebp,0x48000002(%rdi)
1b: 85 ed test %ebp,%ebp
1d: 74 01 je 0x20
1f: fb sti
20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
27: fc ff df
* 2a: 48 01 c3 add %rax,%rbx <-- trapping instruction
2d: 48 c7 03 00 00 00 00 movq $0x0,(%rbx)
34: 48 c7 43 08 00 00 00 movq $0x0,0x8(%rbx)
3b: 00
3c: 48 rex.W
3d: 8b .byte 0x8b
3e: 84 .byte 0x84
3f: 24 .byte 0x24