veth1_vlan: left promiscuous mode
veth0_vlan: left promiscuous mode
==================================================================
BUG: KASAN: slab-out-of-bounds in arp_mc_map+0x418/0x668 net/ipv4/arp.c:189
Read of size 2 at addr ffff0000c86e7618 by task kworker/u8:12/7248
CPU: 0 UID: 0 PID: 7248 Comm: kworker/u8:12 Not tainted 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 PREEMPT
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: netns cleanup_net
Call trace:
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
__dump_stack+0x30/0x40 lib/dump_stack.c:94
dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
print_address_description+0xa8/0x254 mm/kasan/report.c:408
print_report+0x68/0x84 mm/kasan/report.c:521
kasan_report+0xb0/0x110 mm/kasan/report.c:634
__asan_report_load2_noabort+0x20/0x2c mm/kasan/report_generic.c:379
arp_mc_map+0x418/0x668 net/ipv4/arp.c:189
ip_mc_filter_del net/ipv4/igmp.c:1170 [inline]
__igmp_group_dropped+0x14c/0x658 net/ipv4/igmp.c:1304
igmp_group_dropped net/ipv4/igmp.c:1335 [inline]
ip_mc_down+0x130/0x3b8 net/ipv4/igmp.c:1829
inetdev_event+0x228/0x13dc net/ipv4/devinet.c:1642
notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85
raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
call_netdevice_notifiers_info net/core/dev.c:2176 [inline]
call_netdevice_notifiers_extack net/core/dev.c:2214 [inline]
call_netdevice_notifiers net/core/dev.c:2228 [inline]
dev_close_many+0x2d4/0x448 net/core/dev.c:1731
unregister_netdevice_many_notify+0x664/0x1fbc net/core/dev.c:11952
unregister_netdevice_many net/core/dev.c:12046 [inline]
default_device_exit_batch+0x838/0x8b4 net/core/dev.c:12538
ops_exit_list net/core/net_namespace.c:177 [inline]
cleanup_net+0x650/0x9c0 net/core/net_namespace.c:654
process_one_work+0x7e8/0x156c kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x958/0xed8 kernel/workqueue.c:3400
kthread+0x5fc/0x75c kernel/kthread.c:464
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862
Allocated by task 6490:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x40/0x78 mm/kasan/common.c:68
kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__kmalloc_cache_noprof+0x2a4/0x3fc mm/slub.c:4372
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
binderfs_binder_device_create+0x174/0x9d0 drivers/android/binderfs.c:147
binderfs_fill_super+0x7c8/0xc54 drivers/android/binderfs.c:730
vfs_get_super fs/super.c:1280 [inline]
get_tree_nodev+0xb4/0x144 fs/super.c:1299
binderfs_fs_context_get_tree+0x28/0x38 drivers/android/binderfs.c:750
vfs_get_tree+0x90/0x28c fs/super.c:1759
do_new_mount+0x228/0x814 fs/namespace.c:3884
path_mount+0x5b4/0xde0 fs/namespace.c:4211
do_mount fs/namespace.c:4224 [inline]
__do_sys_mount fs/namespace.c:4435 [inline]
__se_sys_mount fs/namespace.c:4412 [inline]
__arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4412
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744
el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
The buggy address belongs to the object at ffff0000c86e7400
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 256 bytes to the right of
allocated 280-byte region [ffff0000c86e7400, ffff0000c86e7518)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1086e4
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000040 ffff0000c0001c80 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 05ffc00000000040 ffff0000c0001c80 0000000000000000 dead000000000001
head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 05ffc00000000002 fffffdffc321b901 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000c86e7500: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c86e7580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000c86e7600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff0000c86e7680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000c86e7700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
Unable to handle kernel paging request at virtual address dfff800000000006
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
Mem abort info:
ESR = 0x0000000096000005
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x05: level 1 translation fault
Data abort info:
ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
CM = 0, WnR = 0, TnD = 0, TagAccess = 0
GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[dfff800000000006] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] SMP
Modules linked in:
CPU: 0 UID: 0 PID: 7248 Comm: kworker/u8:12 Tainted: G B 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 PREEMPT
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: netns cleanup_net
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : read_pnet include/net/net_namespace.h:409 [inline]
pc : sock_net include/net/sock.h:664 [inline]
pc : netlink_broadcast_filtered+0x58/0x10c4 net/netlink/af_netlink.c:1497
lr : read_pnet include/net/net_namespace.h:409 [inline]
lr : sock_net include/net/sock.h:664 [inline]
lr : netlink_broadcast_filtered+0x54/0x10c4 net/netlink/af_netlink.c:1497
sp : ffff8000a0a67100
x29: ffff8000a0a671a0 x28: 1fffe00018d17a04 x27: 0000000000000000
x26: dfff800000000000 x25: 0000000000000cc0 x24: 0000000000000000
x23: 0000000000000000 x22: 0000000000000025 x21: 0000000000000000
x20: ffff0000ce0d7a00 x19: 0000000000000030 x18: 1fffe0003670d276
x17: 0000000000000000 x16: ffff80008ad0f308 x15: 0000000000000003
x14: 1fffe0001f36c47c x13: 0000153c0000153c x12: ffffffffffffffff
x11: ffff60001f36c47f x10: 0000000000ff0100 x9 : 0000000000000000
x8 : 0000000000000006 x7 : 0000153c0000153c x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000cc0 x3 : 0000000000000025
x2 : 0000000000000000 x1 : ffff0000ce0d7a00 x0 : 0000000000000000
Call trace:
read_pnet include/net/net_namespace.h:409 [inline] (P)
sock_net include/net/sock.h:664 [inline] (P)
netlink_broadcast_filtered+0x58/0x10c4 net/netlink/af_netlink.c:1497 (P)
nlmsg_multicast_filtered include/net/netlink.h:1129 [inline]
nlmsg_multicast include/net/netlink.h:1148 [inline]
nlmsg_notify+0xfc/0x1e0 net/netlink/af_netlink.c:2577
rtnl_notify+0xa0/0xd8 net/core/rtnetlink.c:958
inet_ifmcaddr_notify+0xd0/0x154 net/ipv4/igmp.c:1495
__ip_mc_dec_group+0x3f8/0x624 net/ipv4/igmp.c:1778
ip_mc_dec_group include/linux/igmp.h:138 [inline]
ip_mc_down+0x2d4/0x3b8 net/ipv4/igmp.c:1840
inetdev_event+0x228/0x13dc net/ipv4/devinet.c:1642
notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85
raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
call_netdevice_notifiers_info net/core/dev.c:2176 [inline]
call_netdevice_notifiers_extack net/core/dev.c:2214 [inline]
call_netdevice_notifiers net/core/dev.c:2228 [inline]
dev_close_many+0x2d4/0x448 net/core/dev.c:1731
unregister_netdevice_many_notify+0x664/0x1fbc net/core/dev.c:11952
unregister_netdevice_many net/core/dev.c:12046 [inline]
default_device_exit_batch+0x838/0x8b4 net/core/dev.c:12538
ops_exit_list net/core/net_namespace.c:177 [inline]
cleanup_net+0x650/0x9c0 net/core/net_namespace.c:654
process_one_work+0x7e8/0x156c kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x958/0xed8 kernel/workqueue.c:3400
kthread+0x5fc/0x75c kernel/kthread.c:464
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862
Code: 97b74254 9100c313 9466d945 d343fe68 (387a6908)
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
0: 97b74254 bl 0xfffffffffedd0950
4: 9100c313 add x19, x24, #0x30
8: 9466d945 bl 0x19b651c
c: d343fe68 lsr x8, x19, #3
* 10: 387a6908 ldrb w8, [x8, x26] <-- trapping instruction