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BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic_dec_return include/asm-generic/atomic-instrumented.h:340 [inline]
BUG: KASAN: use-after-free in rxrpc_put_bundle+0x1d/0x80 net/rxrpc/conn_client.c:141
Write of size 4 at addr ffff88809dd8cf20 by task syz-executor.5/6903
CPU: 1 PID: 6903 Comm: syz-executor.5 Not tainted 5.9.0-rc5-next-20200915-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x198/0x1fb lib/dump_stack.c:118
print_address_description.constprop.0.cold+0xae/0x497 mm/kasan/report.c:385
__kasan_report mm/kasan/report.c:545 [inline]
kasan_report.cold+0x1f/0x37 mm/kasan/report.c:562
check_memory_region_inline mm/kasan/generic.c:186 [inline]
check_memory_region+0x13d/0x180 mm/kasan/generic.c:192
instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
atomic_dec_return include/asm-generic/atomic-instrumented.h:340 [inline]
rxrpc_put_bundle+0x1d/0x80 net/rxrpc/conn_client.c:141
rxrpc_destroy_connection+0x150/0x2f0 net/rxrpc/conn_object.c:367
rcu_do_batch kernel/rcu/tree.c:2482 [inline]
rcu_core+0x621/0x11d0 kernel/rcu/tree.c:2717
__do_softirq+0x202/0xa42 kernel/softirq.c:298
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:786
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:393 [inline]
__irq_exit_rcu kernel/softirq.c:423 [inline]
irq_exit_rcu+0x235/0x280 kernel/softirq.c:435
sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x4b/0x80 kernel/locking/spinlock.c:199
Code: c0 d8 bb d6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 16 44 d2 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 ab 37 4a f9 65 8b 05 a4 86 fd 77 85 c0 74 02 5d
RSP: 0018:ffffc90005807b50 EFLAGS: 00000282
RAX: 1ffffffff13ad77b RBX: ffff888064bfa300 RCX: 1ffffffff15cb631
RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8880ae735fc0 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae735fc0
R13: ffff888096ef4180 R14: ffff888094881440 R15: 0000000000000000
finish_lock_switch kernel/sched/core.c:3516 [inline]
finish_task_switch+0x147/0x760 kernel/sched/core.c:3616
context_switch kernel/sched/core.c:3780 [inline]
__schedule+0xead/0x21b0 kernel/sched/core.c:4526
schedule+0xcf/0x270 kernel/sched/core.c:4604
freezable_schedule include/linux/freezer.h:172 [inline]
do_nanosleep+0x222/0x650 kernel/time/hrtimer.c:1883
hrtimer_nanosleep+0x1f9/0x430 kernel/time/hrtimer.c:1936
__do_sys_nanosleep kernel/time/hrtimer.c:1970 [inline]
__se_sys_nanosleep kernel/time/hrtimer.c:1957 [inline]
__x64_sys_nanosleep+0x1dc/0x260 kernel/time/hrtimer.c:1957
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45bac1
Code: 75 14 b8 23 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 84 cf fb ff c3 48 83 ec 08 e8 ea 46 00 00 48 89 04 24 b8 23 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 33 47 00 00 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffc44449f90 EFLAGS: 00000293 ORIG_RAX: 0000000000000023
RAX: ffffffffffffffda RBX: 0000000000091359 RCX: 000000000045bac1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffc44449fa0
RBP: 0000000000000866 R08: 0000000000000000 R09: 0000000002fc1940
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000008
R13: 00007ffc44449ff0 R14: 00000000000912d0 R15: 00007ffc4444a000
Allocated by task 26668:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
kasan_set_track mm/kasan/common.c:56 [inline]
__kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
kmem_cache_alloc_trace+0x1a0/0x430 mm/slab.c:3550
kmalloc include/linux/slab.h:554 [inline]
kzalloc include/linux/slab.h:666 [inline]
rxrpc_alloc_bundle+0x7e/0x290 net/rxrpc/conn_client.c:121
rxrpc_look_up_bundle net/rxrpc/conn_client.c:275 [inline]
rxrpc_prep_call net/rxrpc/conn_client.c:374 [inline]
rxrpc_connect_call+0x85c/0x1580 net/rxrpc/conn_client.c:710
rxrpc_new_client_call+0x961/0x1020 net/rxrpc/call_object.c:331
rxrpc_new_client_call_for_sendmsg net/rxrpc/sendmsg.c:622 [inline]
rxrpc_do_sendmsg+0xf14/0x1370 net/rxrpc/sendmsg.c:679
rxrpc_sendmsg+0x420/0x630 net/rxrpc/af_rxrpc.c:560
sock_sendmsg_nosec net/socket.c:651 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:671
____sys_sendmsg+0x6e8/0x810 net/socket.c:2362
___sys_sendmsg+0xf3/0x170 net/socket.c:2416
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2449
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Freed by task 18338:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
kasan_set_track+0x1c/0x30 mm/kasan/common.c:56
kasan_set_free_info+0x1b/0x30 mm/kasan/generic.c:355
__kasan_slab_free+0xd8/0x120 mm/kasan/common.c:422
__cache_free mm/slab.c:3418 [inline]
kfree+0x10e/0x2a0 mm/slab.c:3756
rxrpc_put_bundle net/rxrpc/conn_client.c:146 [inline]
rxrpc_put_bundle+0x6b/0x80 net/rxrpc/conn_client.c:138
rxrpc_unbundle_conn+0x1f8/0x3d0 net/rxrpc/conn_client.c:935
rxrpc_clean_up_local_conns+0x38d/0x590 net/rxrpc/conn_client.c:1114
rxrpc_local_destroyer net/rxrpc/local_object.c:399 [inline]
rxrpc_local_processor+0x38d/0x5e0 net/rxrpc/local_object.c:433
process_one_work+0x933/0x15a0 kernel/workqueue.c:2269
worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Last call_rcu():
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
kasan_record_aux_stack+0x82/0xb0 mm/kasan/generic.c:346
__call_rcu kernel/rcu/tree.c:2959 [inline]
call_rcu+0x15e/0x7c0 kernel/rcu/tree.c:3033
neigh_parms_release net/core/neighbour.c:1662 [inline]
neigh_parms_release+0x1e3/0x260 net/core/neighbour.c:1652
inetdev_destroy net/ipv4/devinet.c:325 [inline]
inetdev_event+0xca6/0x1500 net/ipv4/devinet.c:1599
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2034
call_netdevice_notifiers_extack net/core/dev.c:2046 [inline]
call_netdevice_notifiers net/core/dev.c:2060 [inline]
rollback_registered_many+0x963/0x14f0 net/core/dev.c:9326
unregister_netdevice_many.part.0+0x1a/0x2f0 net/core/dev.c:10471
unregister_netdevice_many+0x36/0x50 net/core/dev.c:10470
ip_tunnel_delete_nets+0x3da/0x580 net/ipv4/ip_tunnel.c:1125
ops_exit_list+0x10d/0x160 net/core/net_namespace.c:189
cleanup_net+0x4ea/0xb10 net/core/net_namespace.c:603
process_one_work+0x933/0x15a0 kernel/workqueue.c:2269
worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
The buggy address belongs to the object at ffff88809dd8cf00
which belongs to the cache kmalloc-192 of size 192
The buggy address is located 32 bytes inside of
192-byte region [ffff88809dd8cf00, ffff88809dd8cfc0)
The buggy address belongs to the page:
page:000000007b6a8469 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88809dd8c800 pfn:0x9dd8c
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea000256de88 ffffea000264ce08 ffff8880aa040000
raw: ffff88809dd8c800 ffff88809dd8c000 000000010000000c 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88809dd8ce00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88809dd8ce80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88809dd8cf00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88809dd8cf80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff88809dd8d000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
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