WARNING: the mand mount option is being deprecated and
will be removed in v5.15!
======================================================
squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop5
==================================================================
BUG: KASAN: use-after-free in packet_rcv+0x5aa/0x1490 net/packet/af_packet.c:2104
Read of size 1 at addr ffff88804d46eeec by task syz-executor.5/9978
CPU: 0 PID: 9978 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0
EXT4-fs (loop2): mount failed
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+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_load1_noabort+0x88/0x90 mm/kasan/report.c:430
packet_rcv+0x5aa/0x1490 net/packet/af_packet.c:2104
deliver_skb net/core/dev.c:1956 [inline]
dev_queue_xmit_nit+0x24d/0xa20 net/core/dev.c:2012
xmit_one net/core/dev.c:3252 [inline]
dev_hard_start_xmit+0xaa/0x920 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838
neigh_resolve_output+0x55a/0x910 net/core/neighbour.c:1374
neigh_output include/net/neighbour.h:501 [inline]
ip6_finish_output2+0x113d/0x2290 net/ipv6/ip6_output.c:120
ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209
dst_output include/net/dst.h:455 [inline]
NF_HOOK include/linux/netfilter.h:289 [inline]
ndisc_send_skb+0xa24/0x1720 net/ipv6/ndisc.c:491
ndisc_send_rs+0x131/0x690 net/ipv6/ndisc.c:685
addrconf_rs_timer+0x384/0x6a0 net/ipv6/addrconf.c:3835
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709
__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]
smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
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:ffff88804d60f6c0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff13e3053 RBX: ffff88804d6041c0 RCX: 1ffff11009ac0952
RDX: dffffc0000000000 RSI: ffff88804d604a98 RDI: ffff88804d604a44
RBP: ffff8880ba02b0c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ba02b0c0
R13: ffff88804d5e6180 R14: 0000000000000000 R15: 0000000000000002
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
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:rcu_read_unlock_special+0x456/0xfc0 kernel/rcu/tree_plugin.h:601
Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 bd 09 00 00 48 83 3d ee 24 a0 08 00 0f 84 37 06 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 83 c4 40 5b 5d 41 5c 41 5d 41 5e 41 5f c3 c3 48
RSP: 0018:ffff88804d60f8d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02
RAX: 1ffffffff13e3051 RBX: 0000000000000000 RCX: 1ffff11009ac0952
RDX: dffffc0000000000 RSI: ffff88804d604a98 RDI: 0000000000000286
RBP: ffff88804d604534 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804d6041c0
R13: ffff88804d604536 R14: ffff88804d604535 R15: ffffffff89f88280
__rcu_read_unlock+0x158/0x160 kernel/rcu/tree_plugin.h:428
rcu_read_unlock include/linux/rcupdate.h:680 [inline]
is_bpf_text_address+0xdf/0x1b0 kernel/bpf/core.c:548
kernel_text_address kernel/extable.c:152 [inline]
kernel_text_address+0xbd/0xf0 kernel/extable.c:122
__kernel_text_address+0x9/0x30 kernel/extable.c:107
unwind_get_return_address arch/x86/kernel/unwind_orc.c:297 [inline]
unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:292
__save_stack_trace+0xaf/0x190 arch/x86/kernel/stacktrace.c:45
save_stack mm/kasan/kasan.c:448 [inline]
set_track mm/kasan/kasan.c:460 [inline]
kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553
slab_post_alloc_hook mm/slab.h:445 [inline]
slab_alloc mm/slab.c:3397 [inline]
kmem_cache_alloc+0x110/0x370 mm/slab.c:3557
kmem_cache_zalloc include/linux/slab.h:699 [inline]
__alloc_file+0x21/0x340 fs/file_table.c:100
alloc_empty_file+0x6d/0x170 fs/file_table.c:150
dentry_open+0x70/0x1d0 fs/open.c:916
do_mq_open+0x589/0x8c0 ipc/mqueue.c:797
__do_sys_mq_open ipc/mqueue.c:824 [inline]
__se_sys_mq_open ipc/mqueue.c:817 [inline]
__x64_sys_mq_open+0x14c/0x1e0 ipc/mqueue.c:817
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f8b2f3860e9
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:00007f8b2dcda168 EFLAGS: 00000246 ORIG_RAX: 00000000000000f0
RAX: ffffffffffffffda RBX: 00007f8b2f499030 RCX: 00007f8b2f3860e9
RDX: 0000000000000000 RSI: 0000000000000042 RDI: 0000000020000040
RBP: 00007f8b2f3e008d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc25a6658f R14: 00007f8b2dcda300 R15: 0000000000022000
Allocated by task 9953:
__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 9953:
__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
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xbf3/0x2be0 kernel/exit.c:870
do_group_exit+0x125/0x310 kernel/exit.c:967
get_signal+0x3f2/0x1f70 kernel/signal.c:2589
do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
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 ffff88804d46e7c0
which belongs to the cache kmalloc-4096 of size 4096
The buggy address is located 1836 bytes inside of
4096-byte region [ffff88804d46e7c0, ffff88804d46f7c0)
The buggy address belongs to the page:
page:ffffea0001351b80 count:1 mapcount:0 mapping:ffff88813bff0dc0 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea0001351b08 ffffea0001351c08 ffff88813bff0dc0
raw: 0000000000000000 ffff88804d46e7c0 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88804d46ed80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88804d46ee00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88804d46ee80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88804d46ef00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88804d46ef80: 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