attempt to access beyond end of device
loop2: rw=1, want=186, limit=16
loop0: rw=2049, want=41, limit=16
==================================================================
loop4: rw=2049, want=98, limit=16
BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:263 [inline]
BUG: KASAN: use-after-free in dev_queue_xmit_nit+0x87e/0xa20 net/core/dev.c:2004
Read of size 8 at addr ffff888097f9b330 by task syz-executor.1/12026
CPU: 1 PID: 12026 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
kasan_report mm/kasan/report.c:412 [inline]
__asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433
__read_once_size include/linux/compiler.h:263 [inline]
dev_queue_xmit_nit+0x87e/0xa20 net/core/dev.c:2004
xmit_one net/core/dev.c:3252 [inline]
dev_hard_start_xmit+0xaa/0x920 net/core/dev.c:3272
sch_direct_xmit+0x2d6/0xf70 net/sched/sch_generic.c:332
attempt to access beyond end of device
qdisc_restart net/sched/sch_generic.c:395 [inline]
__qdisc_run+0x4d0/0x1640 net/sched/sch_generic.c:403
attempt to access beyond end of device
qdisc_run include/net/pkt_sched.h:120 [inline]
__dev_xmit_skb net/core/dev.c:3451 [inline]
__dev_queue_xmit+0x2102/0x2e00 net/core/dev.c:3807
loop2: rw=1, want=187, limit=16
attempt to access beyond end of device
neigh_hh_output include/net/neighbour.h:491 [inline]
neigh_output include/net/neighbour.h:499 [inline]
ip_finish_output2+0xb6d/0x15a0 net/ipv4/ip_output.c:230
ip_finish_output+0xae9/0x10b0 net/ipv4/ip_output.c:318
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
ip_output+0x203/0x5f0 net/ipv4/ip_output.c:406
loop0: rw=2049, want=42, limit=16
dst_output include/net/dst.h:455 [inline]
ip_local_out+0xaf/0x170 net/ipv4/ip_output.c:125
__ip_queue_xmit+0x91e/0x1c10 net/ipv4/ip_output.c:507
attempt to access beyond end of device
__tcp_transmit_skb+0x1b9c/0x3400 net/ipv4/tcp_output.c:1148
loop2: rw=1, want=188, limit=16
__tcp_send_ack.part.0+0x3d9/0x5c0 net/ipv4/tcp_output.c:3643
__tcp_send_ack net/ipv4/tcp_output.c:3649 [inline]
tcp_send_ack+0x7d/0xa0 net/ipv4/tcp_output.c:3649
__tcp_ack_snd_check+0x152/0x890 net/ipv4/tcp_input.c:5213
attempt to access beyond end of device
tcp_rcv_established+0x18f9/0x1ef0 net/ipv4/tcp_input.c:5646
tcp_v4_do_rcv+0x5d6/0x870 net/ipv4/tcp_ipv4.c:1547
tcp_v4_rcv+0x2c03/0x3b80 net/ipv4/tcp_ipv4.c:1832
loop4: rw=2049, want=99, limit=16
ip_local_deliver_finish+0x495/0xc00 net/ipv4/ip_input.c:215
loop0: rw=2049, want=43, limit=16
NF_HOOK include/linux/netfilter.h:289 [inline]
ip_local_deliver+0x188/0x500 net/ipv4/ip_input.c:256
dst_input include/net/dst.h:461 [inline]
ip_rcv_finish+0x1ca/0x2e0 net/ipv4/ip_input.c:414
NF_HOOK include/linux/netfilter.h:289 [inline]
ip_rcv+0xca/0x3c0 net/ipv4/ip_input.c:524
attempt to access beyond end of device
__netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4954
attempt to access beyond end of device
__netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066
netif_receive_skb_internal+0xf0/0x3f0 net/core/dev.c:5156
napi_skb_finish net/core/dev.c:5601 [inline]
napi_gro_receive+0x2e6/0x450 net/core/dev.c:5632
receive_buf+0xc2c/0x6780 drivers/net/virtio_net.c:1088
loop2: rw=1, want=189, limit=16
loop4: rw=2049, want=100, limit=16
attempt to access beyond end of device
virtnet_receive drivers/net/virtio_net.c:1352 [inline]
virtnet_poll+0x568/0xe00 drivers/net/virtio_net.c:1457
attempt to access beyond end of device
napi_poll net/core/dev.c:6280 [inline]
net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346
__do_softirq+0x265/0x980 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:372 [inline]
irq_exit+0x215/0x260 kernel/softirq.c:412
exiting_irq arch/x86/include/asm/apic.h:536 [inline]
do_IRQ+0x10c/0x1c0 arch/x86/kernel/irq.c:258
common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:670
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:192
Code: c0 98 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 01 31 d8 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 26 1b 28 f9 65 8b 05 9f 8d e8 77 85 c0 74 02 5d
RSP: 0018:ffff8880547c73e0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffd5
RAX: 1ffffffff13e3053 RBX: ffff88809fc80040 RCX: 1ffff11013f90122
RDX: dffffc0000000000 RSI: ffff88809fc80918 RDI: ffff88809fc808c4
RBP: ffff8880ba12b0c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ba12b0c0
R13: ffff8880ab8ce5c0 R14: 0000000000000000 R15: 0000000000000001
finish_lock_switch kernel/sched/core.c:2578 [inline]
finish_task_switch+0x146/0x760 kernel/sched/core.c:2678
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x88f/0x2040 kernel/sched/core.c:3517
preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3744
retint_kernel+0x1b/0x2d
loop4: rw=2049, want=101, limit=16
RIP: 0010:__rcu_read_unlock+0x150/0x160 kernel/rcu/tree_plugin.h:428
Code: 89 ef e8 93 f7 46 00 e9 3f ff ff ff 48 89 ef e8 56 fa 46 00 e9 67 ff ff ff e8 7c f7 46 00 eb 97 48 89 ef e8 42 fa 46 00 eb b4 <48> 89 df e8 e8 ee ff ff eb 8d 66 0f 1f 44 00 00 41 57 48 8d b7 c8
RSP: 0018:ffff8880547c75f0 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff88809fc80040 RCX: ffffc90007852000
RDX: 0000000000000000 RSI: ffffffff81d86cc1 RDI: ffff88809fc803b4
RBP: ffff88809fc803b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880ae2b4a80
R13: 0000000000000000 R14: ffff88823513cb40 R15: 0000000000000000
rcu_read_unlock include/linux/rcupdate.h:680 [inline]
ext4_get_group_desc+0x1d6/0x4e0 fs/ext4/balloc.c:284
recently_deleted fs/ext4/ialloc.c:680 [inline]
find_inode_bit+0x1a0/0x520 fs/ext4/ialloc.c:724
__ext4_new_inode+0x160c/0x5a20 fs/ext4/ialloc.c:916
ext4_create+0x29e/0x5f0 fs/ext4/namei.c:2517
loop0: rw=2049, want=120, limit=16
lookup_open+0x893/0x1a20 fs/namei.c:3235
do_last fs/namei.c:3327 [inline]
path_openat+0x1094/0x2df0 fs/namei.c:3537
attempt to access beyond end of device
do_filp_open+0x18c/0x3f0 fs/namei.c:3567
attempt to access beyond end of device
do_sys_open+0x3b3/0x520 fs/open.c:1085
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f7032bb9209
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f703152e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f7032ccbf60 RCX: 00007f7032bb9209
RDX: 000000000000275a RSI: 00000000200001c0 RDI: ffffffffffffff9c
RBP: 00007f7032c13161 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcd10b36ff R14: 00007f703152e300 R15: 0000000000022000
Allocated by task 12025:
__do_kmalloc mm/slab.c:3727 [inline]
__kmalloc+0x15a/0x3c0 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
sk_prot_alloc+0x1e2/0x2d0 net/core/sock.c:1483
sk_alloc+0x36/0xec0 net/core/sock.c:1537
packet_create+0x117/0x850 net/packet/af_packet.c:3259
__sock_create+0x3d8/0x740 net/socket.c:1365
sock_create net/socket.c:1416 [inline]
__sys_socket+0xef/0x200 net/socket.c:1458
__do_sys_socket net/socket.c:1467 [inline]
__se_sys_socket net/socket.c:1465 [inline]
__x64_sys_socket+0x6f/0xb0 net/socket.c:1465
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 12019:
__cache_free mm/slab.c:3503 [inline]
kfree+0xcc/0x210 mm/slab.c:3822
sk_prot_free net/core/sock.c:1520 [inline]
__sk_destruct+0x684/0x8a0 net/core/sock.c:1602
sk_destruct net/core/sock.c:1617 [inline]
__sk_free+0x165/0x3b0 net/core/sock.c:1628
sk_free+0x3b/0x50 net/core/sock.c:1639
sock_put include/net/sock.h:1713 [inline]
packet_release+0x890/0xb70 net/packet/af_packet.c:3088
__sock_release+0xcd/0x2a0 net/socket.c:599
sock_close+0x15/0x20 net/socket.c:1214
__fput+0x2ce/0x890 fs/file_table.c:278
task_work_run+0x148/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff888097f9ab00
which belongs to the cache kmalloc-4096 of size 4096
The buggy address is located 2096 bytes inside of
4096-byte region [ffff888097f9ab00, ffff888097f9bb00)
The buggy address belongs to the page:
page:ffffea00025fe680 count:1 mapcount:0 mapping:ffff88813bff0dc0 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea0002a6f388 ffffea000235df88 ffff88813bff0dc0
raw: 0000000000000000 ffff888097f9ab00 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888097f9b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888097f9b280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888097f9b300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888097f9b380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888097f9b400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess), 5 bytes skipped:
0: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
7: fc ff df
a: 48 c1 e8 03 shr $0x3,%rax
e: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1)
12: 75 31 jne 0x45
14: 48 83 3d 01 31 d8 01 cmpq $0x0,0x1d83101(%rip) # 0x1d8311d
1b: 00
1c: 74 25 je 0x43
1e: fb sti
1f: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
* 25: bf 01 00 00 00 mov $0x1,%edi <-- trapping instruction
2a: e8 26 1b 28 f9 callq 0xf9281b55
2f: 65 8b 05 9f 8d e8 77 mov %gs:0x77e88d9f(%rip),%eax # 0x77e88dd5
36: 85 c0 test %eax,%eax
38: 74 02 je 0x3c
3a: 5d pop %rbp