8021q: adding VLAN 0 to HW filter on device batadv0
==================================================================
BUG: KASAN: slab-use-after-free in netdev_master_upper_dev_get_rcu+0xd0/0xf0 net/core/dev.c:8429
Read of size 1 at addr ffff88806e7ca890 by task syz-executor/15369
CPU: 2 UID: 0 PID: 15369 Comm: syz-executor Not tainted 6.16.0-syzkaller-11852-g479058002c32 #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
netdev_master_upper_dev_get_rcu+0xd0/0xf0 net/core/dev.c:8429
rtnl_link_get_slave_info_data_size net/core/rtnetlink.c:705 [inline]
rtnl_link_get_size net/core/rtnetlink.c:741 [inline]
if_nlmsg_size+0x241/0xaf0 net/core/rtnetlink.c:1309
rtmsg_ifinfo_build_skb+0x6d/0x280 net/core/rtnetlink.c:4392
rtmsg_ifinfo_event net/core/rtnetlink.c:4434 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:4424 [inline]
rtnetlink_event+0xf3/0x1f0 net/core/rtnetlink.c:7006
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2229
call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
call_netdevice_notifiers net/core/dev.c:2281 [inline]
netif_set_mac_address+0x36f/0x4a0 net/core/dev.c:9781
do_setlink.constprop.0+0x75f/0x4380 net/core/rtnetlink.c:3095
rtnl_changelink net/core/rtnetlink.c:3761 [inline]
__rtnl_newlink net/core/rtnetlink.c:3920 [inline]
rtnl_newlink+0x1446/0x2000 net/core/rtnetlink.c:4057
rtnetlink_rcv_msg+0x95b/0xe90 net/core/rtnetlink.c:6946
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x5a7/0x870 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:714 [inline]
__sock_sendmsg net/socket.c:729 [inline]
__sys_sendto+0x4a3/0x520 net/socket.c:2228
__do_compat_sys_socketcall net/compat.c:475 [inline]
__se_compat_sys_socketcall net/compat.c:423 [inline]
__ia32_compat_sys_socketcall+0x625/0x770 net/compat.c:423
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f16579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000ff8afe70 EFLAGS: 00000293 ORIG_RAX: 0000000000000066
RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00000000ff8afe84
RDX: 0000000000000000 RSI: 00000000f7f04568 RDI: 00000000f73a4ff4
RBP: 00000000f7f04568 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Allocated by task 15369:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:388 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:405
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4365 [inline]
__kmalloc_noprof+0x223/0x510 mm/slub.c:4377
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
tnode_alloc net/ipv4/fib_trie.c:327 [inline]
tnode_new+0x25a/0x340 net/ipv4/fib_trie.c:380
fib_insert_node net/ipv4/fib_trie.c:1125 [inline]
fib_insert_alias+0x6ee/0xe30 net/ipv4/fib_trie.c:1159
fib_table_insert+0xa0c/0x1c40 net/ipv4/fib_trie.c:1354
fib_magic+0x4d4/0x5c0 net/ipv4/fib_frontend.c:1133
fib_add_ifaddr+0x16d/0x580 net/ipv4/fib_frontend.c:1155
fib_inetaddr_event+0x147/0x270 net/ipv4/fib_frontend.c:1469
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
blocking_notifier_call_chain kernel/notifier.c:380 [inline]
blocking_notifier_call_chain+0x69/0xa0 kernel/notifier.c:368
__inet_insert_ifa+0x925/0xcd0 net/ipv4/devinet.c:567
inet_rtm_newaddr+0xd87/0x1540 net/ipv4/devinet.c:1002
rtnetlink_rcv_msg+0x95b/0xe90 net/core/rtnetlink.c:6946
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x5a7/0x870 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:714 [inline]
__sock_sendmsg net/socket.c:729 [inline]
__sys_sendto+0x4a3/0x520 net/socket.c:2228
__do_compat_sys_socketcall net/compat.c:475 [inline]
__se_compat_sys_socketcall net/compat.c:423 [inline]
__ia32_compat_sys_socketcall+0x625/0x770 net/compat.c:423
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
Freed by task 23:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:243 [inline]
__kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2417 [inline]
slab_free mm/slub.c:4680 [inline]
kfree+0x2b4/0x4d0 mm/slub.c:4879
__node_free_rcu+0x6f/0x80 net/ipv4/fib_trie.c:310
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
run_ksoftirqd kernel/softirq.c:968 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:960
smpboot_thread_fn+0x3f4/0xae0 kernel/smpboot.c:160
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3123
tnode_free+0xb5/0x120 net/ipv4/fib_trie.c:491
replace+0x149/0x4f0 net/ipv4/fib_trie.c:517
inflate net/ipv4/fib_trie.c:619 [inline]
resize+0x105a/0x22a0 net/ipv4/fib_trie.c:864
trie_rebalance net/ipv4/fib_trie.c:1101 [inline]
fib_insert_node net/ipv4/fib_trie.c:1145 [inline]
fib_insert_alias+0x9b9/0xe30 net/ipv4/fib_trie.c:1159
fib_table_insert+0xa0c/0x1c40 net/ipv4/fib_trie.c:1354
fib_magic+0x4d4/0x5c0 net/ipv4/fib_frontend.c:1133
fib_add_ifaddr+0x16d/0x580 net/ipv4/fib_frontend.c:1155
fib_inetaddr_event+0x147/0x270 net/ipv4/fib_frontend.c:1469
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
blocking_notifier_call_chain kernel/notifier.c:380 [inline]
blocking_notifier_call_chain+0x69/0xa0 kernel/notifier.c:368
__inet_insert_ifa+0x925/0xcd0 net/ipv4/devinet.c:567
inet_rtm_newaddr+0xd87/0x1540 net/ipv4/devinet.c:1002
rtnetlink_rcv_msg+0x95b/0xe90 net/core/rtnetlink.c:6946
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x5a7/0x870 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:714 [inline]
__sock_sendmsg net/socket.c:729 [inline]
__sys_sendto+0x4a3/0x520 net/socket.c:2228
__do_compat_sys_socketcall net/compat.c:475 [inline]
__se_compat_sys_socketcall net/compat.c:423 [inline]
__ia32_compat_sys_socketcall+0x625/0x770 net/compat.c:423
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
The buggy address belongs to the object at ffff88806e7ca880
which belongs to the cache kmalloc-64 of size 64
The buggy address is located 16 bytes inside of
freed 64-byte region [ffff88806e7ca880, ffff88806e7ca8c0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6e7ca
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000000 ffff88801b8428c0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000200020 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 6084, tgid 6083 (syz.2.12), ts 49278053441, free_ts 49175348445
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:2487 [inline]
allocate_slab mm/slub.c:2655 [inline]
new_slab+0x247/0x330 mm/slub.c:2709
___slab_alloc+0xcf2/0x1740 mm/slub.c:3891
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3981
__slab_alloc_node mm/slub.c:4056 [inline]
slab_alloc_node mm/slub.c:4217 [inline]
__kmalloc_cache_noprof+0xfb/0x3e0 mm/slub.c:4391
kmalloc_noprof include/linux/slab.h:905 [inline]
ip_setup_cork+0x63b/0xa30 net/ipv4/ip_output.c:1307
ip_append_data net/ipv4/ip_output.c:1364 [inline]
ip_append_data+0x163/0x1a0 net/ipv4/ip_output.c:1350
icmp_push_reply+0xa8/0x440 net/ipv4/icmp.c:375
__icmp_send+0xcdf/0x1960 net/ipv4/icmp.c:783
icmp_send include/net/icmp.h:43 [inline]
ip_protocol_deliver_rcu+0x41c/0x4c0 net/ipv4/ip_input.c:216
ip_local_deliver_finish+0x3f2/0x720 net/ipv4/ip_input.c:239
NF_HOOK include/linux/netfilter.h:318 [inline]
NF_HOOK include/linux/netfilter.h:312 [inline]
ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:260
dst_input include/net/dst.h:471 [inline]
ip_rcv_finish net/ipv4/ip_input.c:454 [inline]
NF_HOOK include/linux/netfilter.h:318 [inline]
NF_HOOK include/linux/netfilter.h:312 [inline]
ip_rcv+0x2e0/0x600 net/ipv4/ip_input.c:574
page last free pid 0 tgid 0 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895
pagetable_free include/linux/mm.h:2898 [inline]
pagetable_dtor_free include/linux/mm.h:2996 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x116/0x1a0 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Memory state around the buggy address:
ffff88806e7ca780: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
ffff88806e7ca800: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
>ffff88806e7ca880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
^
ffff88806e7ca900: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
ffff88806e7ca980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi