==================================================================
BUG: KASAN: slab-out-of-bounds in decode_session6+0xfc3/0x17f0 net/xfrm/xfrm_policy.c:3375
Read of size 1 at addr ffff8880457b46b8 by task syz-executor.5/3640
CPU: 0 PID: 3640 Comm: syz-executor.5 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:317 [inline]
print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
kasan_report+0xb1/0x1e0 mm/kasan/report.c:495
decode_session6+0xfc3/0x17f0 net/xfrm/xfrm_policy.c:3375
__xfrm_decode_session+0x50/0xb0 net/xfrm/xfrm_policy.c:3481
xfrm_decode_session include/net/xfrm.h:1168 [inline]
xfrmi_xmit+0x175/0x1b90 net/xfrm/xfrm_interface.c:485
__netdev_start_xmit include/linux/netdevice.h:4840 [inline]
netdev_start_xmit include/linux/netdevice.h:4854 [inline]
xmit_one net/core/dev.c:3590 [inline]
dev_hard_start_xmit+0x183/0x880 net/core/dev.c:3606
sch_direct_xmit+0x19f/0xbe0 net/sched/sch_generic.c:342
qdisc_restart net/sched/sch_generic.c:407 [inline]
__qdisc_run+0x4bb/0x1710 net/sched/sch_generic.c:415
__dev_xmit_skb net/core/dev.c:3880 [inline]
__dev_queue_xmit+0x2299/0x3ad0 net/core/dev.c:4222
dev_queue_xmit include/linux/netdevice.h:3008 [inline]
neigh_connected_output+0x3c0/0x520 net/core/neighbour.c:1581
neigh_output include/net/neighbour.h:546 [inline]
ip6_finish_output2+0x564/0x1520 net/ipv6/ip6_output.c:134
__ip6_finish_output net/ipv6/ip6_output.c:195 [inline]
ip6_finish_output+0x690/0x1160 net/ipv6/ip6_output.c:206
NF_HOOK_COND include/linux/netfilter.h:291 [inline]
ip6_output+0x1ed/0x540 net/ipv6/ip6_output.c:227
dst_output include/net/dst.h:445 [inline]
NF_HOOK include/linux/netfilter.h:302 [inline]
ndisc_send_skb+0xa5f/0x1730 net/ipv6/ndisc.c:508
ndisc_send_rs+0x12e/0x6f0 net/ipv6/ndisc.c:718
addrconf_rs_timer+0x3ed/0x820 net/ipv6/addrconf.c:3931
call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790
__run_timers kernel/time/timer.c:1768 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
__do_softirq+0x1d0/0x9c8 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1107
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:finish_task_switch.isra.0+0x2bf/0xc70 kernel/sched/core.c:5063
Code: 8b 3a 4c 89 e7 48 c7 02 00 00 00 00 ff d1 4d 85 ff 75 bf 4c 89 e7 e8 60 f8 ff ff e8 6b 4f 2f 00 fb 65 48 8b 1c 25 80 6f 02 00 <48> 8d bb 98 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc90003ddfad0 EFLAGS: 00000202
RAX: 0000000000293c91 RBX: ffff8880209a9d80 RCX: 1ffffffff1bbfd69
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003ddfb18 R08: 0000000000000001 R09: 0000000000000001
R10: ffffed10173473f8 R11: 0000000000000000 R12: ffff8880b9a39fc0
R13: ffff888020bfd880 R14: 0000000000000000 R15: ffff8880b9a3a9f8
context_switch kernel/sched/core.c:5186 [inline]
__schedule+0xae7/0x52b0 kernel/sched/core.c:6495
schedule+0xda/0x1b0 kernel/sched/core.c:6571
freezable_schedule include/linux/freezer.h:172 [inline]
do_nanosleep+0x197/0x690 kernel/time/hrtimer.c:2044
hrtimer_nanosleep+0x1f9/0x4a0 kernel/time/hrtimer.c:2097
common_nsleep+0xa2/0xc0 kernel/time/posix-timers.c:1236
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1276 [inline]
__se_sys_clock_nanosleep kernel/time/posix-timers.c:1254 [inline]
__x64_sys_clock_nanosleep+0x2f4/0x430 kernel/time/posix-timers.c:1254
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa0ad0b02d1
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f
RSP: 002b:00007ffedc519a00 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00000000000004b9 RCX: 00007fa0ad0b02d1
RDX: 00007ffedc519a40 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffedc519acc R08: 0000000000000000 R09: 00007ffedc5bd080
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 000000000006c9ac R14: 0000000000000009 R15: 00007ffedc519b30
Allocated by task 3641:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:437 [inline]
____kasan_kmalloc mm/kasan/common.c:516 [inline]
____kasan_kmalloc mm/kasan/common.c:475 [inline]
__kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525
kmalloc include/linux/slab.h:600 [inline]
kzalloc include/linux/slab.h:733 [inline]
ipv6_add_addr+0x352/0x1de0 net/ipv6/addrconf.c:1099
add_addr+0xe1/0x350 net/ipv6/addrconf.c:3102
add_v4_addrs+0x61e/0x880 net/ipv6/addrconf.c:3167
addrconf_gre_config net/ipv6/addrconf.c:3443 [inline]
addrconf_notify+0xa43/0x1c10 net/ipv6/addrconf.c:3627
notifier_call_chain+0xb5/0x200 kernel/notifier.c:87
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945
call_netdevice_notifiers_extack net/core/dev.c:1983 [inline]
call_netdevice_notifiers net/core/dev.c:1997 [inline]
__dev_notify_flags+0x110/0x2b0 net/core/dev.c:8577
dev_change_flags+0x112/0x170 net/core/dev.c:8615
do_setlink+0x9f1/0x3bb0 net/core/rtnetlink.c:2788
__rtnl_newlink+0xd6a/0x17e0 net/core/rtnetlink.c:3547
rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3594
rtnetlink_rcv_msg+0x43a/0xca0 net/core/rtnetlink.c:6091
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2540
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345
netlink_sendmsg+0x917/0xe10 net/netlink/af_netlink.c:1921
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:734
__sys_sendto+0x236/0x340 net/socket.c:2117
__do_sys_sendto net/socket.c:2129 [inline]
__se_sys_sendto net/socket.c:2125 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2125
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff8880457b4400
which belongs to the cache kmalloc-cg-512 of size 512
The buggy address is located 184 bytes to the right of
512-byte region [ffff8880457b4400, ffff8880457b4600)
The buggy address belongs to the physical page:
page:ffffea000115ed00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880457b7000 pfn:0x457b4
head:ffffea000115ed00 order:2 compound_mapcount:0 compound_pincount:0
memcg:ffff888020d6df01
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea000113ff08 ffffea0001117508 ffff888011842dc0
raw: ffff8880457b7000 000000000010000f 00000001ffffffff ffff888020d6df01
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3655, tgid 3655 (udevd), ts 197430949525, free_ts 11494236018
prep_new_page mm/page_alloc.c:2532 [inline]
get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283
__alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549
alloc_pages+0x1a6/0x270 mm/mempolicy.c:2270
alloc_slab_page mm/slub.c:1829 [inline]
allocate_slab+0x27e/0x3d0 mm/slub.c:1974
new_slab mm/slub.c:2034 [inline]
___slab_alloc+0x84f/0xe80 mm/slub.c:3036
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3123
slab_alloc_node mm/slub.c:3214 [inline]
__kmalloc_node_track_caller+0x2f1/0x390 mm/slub.c:4964
kmalloc_reserve net/core/skbuff.c:437 [inline]
__alloc_skb+0xd9/0x2f0 net/core/skbuff.c:509
alloc_skb include/linux/skbuff.h:1265 [inline]
alloc_skb_with_frags+0x93/0x6c0 net/core/skbuff.c:6124
sock_alloc_send_pskb+0x7a3/0x930 net/core/sock.c:2719
unix_dgram_sendmsg+0x415/0x1b50 net/unix/af_unix.c:1943
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:734
sock_write_iter+0x291/0x3d0 net/socket.c:1108
call_write_iter include/linux/fs.h:2187 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x9e9/0xdd0 fs/read_write.c:584
ksys_write+0x1e8/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1449 [inline]
free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499
free_unref_page_prepare mm/page_alloc.c:3380 [inline]
free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476
free_contig_range+0xb1/0x180 mm/page_alloc.c:9453
destroy_args+0xa8/0x646 mm/debug_vm_pgtable.c:1031
debug_vm_pgtable+0x2945/0x29d6 mm/debug_vm_pgtable.c:1354
do_one_initcall+0xfe/0x650 init/main.c:1296
do_initcall_level init/main.c:1369 [inline]
do_initcalls init/main.c:1385 [inline]
do_basic_setup init/main.c:1404 [inline]
kernel_init_freeable+0x6b1/0x73a init/main.c:1623
kernel_init+0x1a/0x1d0 init/main.c:1512
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Memory state around the buggy address:
ffff8880457b4580: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
ffff8880457b4600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880457b4680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff8880457b4700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880457b4780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess):
0: 8b 3a mov (%rdx),%edi
2: 4c 89 e7 mov %r12,%rdi
5: 48 c7 02 00 00 00 00 movq $0x0,(%rdx)
c: ff d1 callq *%rcx
e: 4d 85 ff test %r15,%r15
11: 75 bf jne 0xffffffd2
13: 4c 89 e7 mov %r12,%rdi
16: e8 60 f8 ff ff callq 0xfffff87b
1b: e8 6b 4f 2f 00 callq 0x2f4f8b
20: fb sti
21: 65 48 8b 1c 25 80 6f mov %gs:0x26f80,%rbx
28: 02 00
* 2a: 48 8d bb 98 15 00 00 lea 0x1598(%rbx),%rdi <-- trapping instruction
31: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
38: fc ff df
3b: 48 89 fa mov %rdi,%rdx
3e: 48 rex.W
3f: c1 .byte 0xc1