============================================
WARNING: possible recursive locking detected
6.7.0-next-20240119-syzkaller #0 Not tainted
--------------------------------------------
kworker/0:3/22902 is trying to acquire lock:
ffff88804c668218 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff88804c668218 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: __dev_xmit_skb net/core/dev.c:3806 [inline]
ffff88804c668218 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: __dev_queue_xmit+0x2fa3/0x3ef0 net/core/dev.c:4317
but task is already holding lock:
ffff88804212b258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: spin_trylock include/linux/spinlock.h:361 [inline]
ffff88804212b258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: qdisc_run_begin include/net/sch_generic.h:195 [inline]
ffff88804212b258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: qdisc_run_begin include/net/sch_generic.h:192 [inline]
ffff88804212b258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: __dev_xmit_skb net/core/dev.c:3763 [inline]
ffff88804212b258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: __dev_queue_xmit+0x109f/0x3ef0 net/core/dev.c:4317
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(dev->qdisc_tx_busylock ?: &qdisc_tx_busylock);
lock(dev->qdisc_tx_busylock ?: &qdisc_tx_busylock);
*** DEADLOCK ***
May be due to missing lock nesting notation
10 locks held by kworker/0:3/22902:
#0: ffff888014c94d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ba/0x16e0 kernel/workqueue.c:2608
#1: ffffc90009b1fd80 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0x824/0x16e0 kernel/workqueue.c:2609
#2: ffff8880365bf250 (&devlink->lock_key#28){+.+.}-{3:3}, at: nsim_dev_trap_report_work+0x53/0xc80 drivers/net/netdevsim/dev.c:841
#3: ffff88802620d8e0 (&nsim_trap_data->trap_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
#3: ffff88802620d8e0 (&nsim_trap_data->trap_lock){+.+.}-{2:2}, at: nsim_dev_trap_report drivers/net/netdevsim/dev.c:791 [inline]
#3: ffff88802620d8e0 (&nsim_trap_data->trap_lock){+.+.}-{2:2}, at: nsim_dev_trap_report_work+0x1c5/0xc80 drivers/net/netdevsim/dev.c:850
#4: ffffc90000007ce0 ((&in_dev->mr_ifc_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1697
#5: ffffffff8d5aec20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#5: ffffffff8d5aec20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#5: ffffffff8d5aec20 (rcu_read_lock){....}-{1:2}, at: ip_finish_output2+0x364/0x2550 net/ipv4/ip_output.c:228
#6: ffffffff8d5aebc0 (rcu_read_lock_bh){....}-{1:2}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
#6: ffffffff8d5aebc0 (rcu_read_lock_bh){....}-{1:2}, at: rcu_read_lock_bh include/linux/rcupdate.h:802 [inline]
#6: ffffffff8d5aebc0 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x244/0x3ef0 net/core/dev.c:4276
#7: ffff88804212b258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: spin_trylock include/linux/spinlock.h:361 [inline]
#7: ffff88804212b258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: qdisc_run_begin include/net/sch_generic.h:195 [inline]
#7: ffff88804212b258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: qdisc_run_begin include/net/sch_generic.h:192 [inline]
#7: ffff88804212b258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: __dev_xmit_skb net/core/dev.c:3763 [inline]
#7: ffff88804212b258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: __dev_queue_xmit+0x109f/0x3ef0 net/core/dev.c:4317
#8: ffffffff8d5aec20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#8: ffffffff8d5aec20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#8: ffffffff8d5aec20 (rcu_read_lock){....}-{1:2}, at: ip_finish_output2+0x364/0x2550 net/ipv4/ip_output.c:228
#9: ffffffff8d5aebc0 (rcu_read_lock_bh){....}-{1:2}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
#9: ffffffff8d5aebc0 (rcu_read_lock_bh){....}-{1:2}, at: rcu_read_lock_bh include/linux/rcupdate.h:802 [inline]
#9: ffffffff8d5aebc0 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x244/0x3ef0 net/core/dev.c:4276
stack backtrace:
CPU: 0 PID: 22902 Comm: kworker/0:3 Not tainted 6.7.0-next-20240119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events nsim_dev_trap_report_work
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
check_deadlock kernel/locking/lockdep.c:3062 [inline]
validate_chain kernel/locking/lockdep.c:3856 [inline]
__lock_acquire+0x20e6/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
__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]
__dev_xmit_skb net/core/dev.c:3806 [inline]
__dev_queue_xmit+0x2fa3/0x3ef0 net/core/dev.c:4317
dev_queue_xmit include/linux/netdevice.h:3171 [inline]
neigh_hh_output include/net/neighbour.h:526 [inline]
neigh_output include/net/neighbour.h:540 [inline]
ip_finish_output2+0x169f/0x2550 net/ipv4/ip_output.c:235
__ip_finish_output net/ipv4/ip_output.c:313 [inline]
__ip_finish_output+0x49e/0x950 net/ipv4/ip_output.c:295
ip_finish_output+0x31/0x310 net/ipv4/ip_output.c:323
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip_output+0x13b/0x2a0 net/ipv4/ip_output.c:433
dst_output include/net/dst.h:451 [inline]
ip_local_out+0x33e/0x4a0 net/ipv4/ip_output.c:129
iptunnel_xmit+0x5b4/0x9b0 net/ipv4/ip_tunnel_core.c:82
ip_tunnel_xmit+0x1dbc/0x33d0 net/ipv4/ip_tunnel.c:831
gre_tap_xmit+0x3a5/0x620 net/ipv4/ip_gre.c:748
__netdev_start_xmit include/linux/netdevice.h:4989 [inline]
netdev_start_xmit include/linux/netdevice.h:5003 [inline]
xmit_one net/core/dev.c:3547 [inline]
dev_hard_start_xmit+0x144/0x700 net/core/dev.c:3563
sch_direct_xmit+0x1ac/0xc20 net/sched/sch_generic.c:342
__dev_xmit_skb net/core/dev.c:3776 [inline]
__dev_queue_xmit+0x12c3/0x3ef0 net/core/dev.c:4317
dev_queue_xmit include/linux/netdevice.h:3171 [inline]
neigh_resolve_output net/core/neighbour.c:1563 [inline]
neigh_resolve_output+0x587/0x900 net/core/neighbour.c:1543
neigh_output include/net/neighbour.h:542 [inline]
ip_finish_output2+0x82d/0x2550 net/ipv4/ip_output.c:235
__ip_finish_output net/ipv4/ip_output.c:313 [inline]
__ip_finish_output+0x49e/0x950 net/ipv4/ip_output.c:295
ip_finish_output+0x31/0x310 net/ipv4/ip_output.c:323
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip_output+0x13b/0x2a0 net/ipv4/ip_output.c:433
dst_output include/net/dst.h:451 [inline]
ip_local_out+0x33e/0x4a0 net/ipv4/ip_output.c:129
igmpv3_send_cr net/ipv4/igmp.c:723 [inline]
igmp_ifc_timer_expire+0x781/0x1050 net/ipv4/igmp.c:813
call_timer_fn+0x1a0/0x5b0 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x762/0xaa0 kernel/time/timer.c:2038
run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2051
__do_softirq+0x218/0x8de kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb9/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:write_comp_data+0x34/0x90 kernel/kcov.c:236
Code: 48 8b 15 cf a6 77 7e 65 8b 05 d0 a6 77 7e a9 00 01 ff 00 74 0f f6 c4 01 74 59 8b 82 fc 15 00 00 85 c0 74 4f 8b 82 d8 15 00 00 <83> f8 03 75 44 48 8b 82 e0 15 00 00 8b 92 dc 15 00 00 48 8b 38 48
RSP: 0018:ffffc90009b1f710 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8f922e18 RCX: ffffffff813bfa74
RDX: ffff88804665d940 RSI: ffffffff81e60f50 RDI: 0000000000000006
RBP: ffffffff8f922e30 R08: 0000000000000006 R09: ffffffff81e60f50
R10: ffffffff81e60f69 R11: 0000000000000004 R12: ffffffff81e60f50
R13: ffffffff81e60f69 R14: dffffc0000000000 R15: ffffffff8f922e24
__orc_find+0xc4/0x130 arch/x86/kernel/unwind_orc.c:102
orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
unwind_next_frame+0x32d/0x2390 arch/x86/kernel/unwind_orc.c:494
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:640
poison_slab_object mm/kasan/common.c:241 [inline]
__kasan_slab_free+0x121/0x1c0 mm/kasan/common.c:257
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2121 [inline]
slab_free mm/slub.c:4299 [inline]
kmem_cache_free+0x12e/0x360 mm/slub.c:4363
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1051
__kfree_skb net/core/skbuff.c:1109 [inline]
consume_skb net/core/skbuff.c:1324 [inline]
consume_skb+0xdf/0x170 net/core/skbuff.c:1318
nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline]
nsim_dev_trap_report_work+0x878/0xc80 drivers/net/netdevsim/dev.c:850
process_one_work+0x8d5/0x16e0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2707 [inline]
worker_thread+0x8b6/0x1290 kernel/workqueue.c:2788
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
----------------
Code disassembly (best guess):
0: 48 8b 15 cf a6 77 7e mov 0x7e77a6cf(%rip),%rdx # 0x7e77a6d6
7: 65 8b 05 d0 a6 77 7e mov %gs:0x7e77a6d0(%rip),%eax # 0x7e77a6de
e: a9 00 01 ff 00 test $0xff0100,%eax
13: 74 0f je 0x24
15: f6 c4 01 test $0x1,%ah
18: 74 59 je 0x73
1a: 8b 82 fc 15 00 00 mov 0x15fc(%rdx),%eax
20: 85 c0 test %eax,%eax
22: 74 4f je 0x73
24: 8b 82 d8 15 00 00 mov 0x15d8(%rdx),%eax
* 2a: 83 f8 03 cmp $0x3,%eax <-- trapping instruction
2d: 75 44 jne 0x73
2f: 48 8b 82 e0 15 00 00 mov 0x15e0(%rdx),%rax
36: 8b 92 dc 15 00 00 mov 0x15dc(%rdx),%edx
3c: 48 8b 38 mov (%rax),%rdi
3f: 48 rex.W