==================================================================
BUG: KASAN: use-after-free in decode_session6+0xfe0/0x1830 net/xfrm/xfrm_policy.c:3371
Read of size 1 at addr ffff8880653fb8b8 by task swapper/1/0
CPU: 1 PID: 0 Comm: swapper/1 Tainted: G W 5.17.0-syzkaller-12882-g1930a6e739c4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description.constprop.0.cold+0xeb/0x495 mm/kasan/report.c:313
print_report mm/kasan/report.c:429 [inline]
kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491
decode_session6+0xfe0/0x1830 net/xfrm/xfrm_policy.c:3371
__xfrm_decode_session+0x50/0xb0 net/xfrm/xfrm_policy.c:3477
xfrm_decode_session include/net/xfrm.h:1144 [inline]
vti6_tnl_xmit+0x418/0x1fe0 net/ipv6/ip6_vti.c:577
__netdev_start_xmit include/linux/netdevice.h:4778 [inline]
netdev_start_xmit include/linux/netdevice.h:4792 [inline]
xmit_one net/core/dev.c:3532 [inline]
dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3548
sch_direct_xmit+0x19f/0xbe0 net/sched/sch_generic.c:342
qdisc_restart net/sched/sch_generic.c:407 [inline]
__qdisc_run+0x4c0/0x1720 net/sched/sch_generic.c:415
__dev_xmit_skb net/core/dev.c:3822 [inline]
__dev_queue_xmit+0x21b7/0x39c0 net/core/dev.c:4141
neigh_connected_output+0x3b6/0x510 net/core/neighbour.c:1557
neigh_output include/net/neighbour.h:549 [inline]
ip6_finish_output2+0x56e/0x1500 net/ipv6/ip6_output.c:126
__ip6_finish_output net/ipv6/ip6_output.c:191 [inline]
__ip6_finish_output+0x61e/0xe90 net/ipv6/ip6_output.c:170
ip6_finish_output+0x32/0x280 net/ipv6/ip6_output.c:201
NF_HOOK_COND include/linux/netfilter.h:296 [inline]
ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224
dst_output include/net/dst.h:451 [inline]
NF_HOOK include/linux/netfilter.h:307 [inline]
ndisc_send_skb+0xa92/0x17f0 net/ipv6/ndisc.c:507
ndisc_send_rs+0x12e/0x6f0 net/ipv6/ndisc.c:717
addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3913
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers.part.0+0x67c/0xa30 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:116 [inline]
RIP: 0010:acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:556
Code: 89 de e8 8d e1 17 f8 84 db 75 ac e8 a4 dd 17 f8 e8 df 24 1e f8 eb 0c e8 98 dd 17 f8 0f 00 2d 01 60 d1 00 e8 8c dd 17 f8 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 07 e0 17 f8 48 85 db
RSP: 0018:ffffc90000177d18 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888010e69d00 RSI: ffffffff8960bc64 RDI: ffffffff8960bc51
RBP: ffff888145b54064 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff817ee168 R11: 0000000000000000 R12: 0000000000000001
R13: ffff888145b54000 R14: ffff888145b54064 R15: ffff888147b2a004
acpi_idle_enter+0x361/0x500 drivers/acpi/processor_idle.c:692
cpuidle_enter_state+0x1b1/0xc80 drivers/cpuidle/cpuidle.c:237
cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:351
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x3e8/0x590 kernel/sched/idle.c:303
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400
start_secondary+0x265/0x340 arch/x86/kernel/smpboot.c:266
secondary_startup_64_no_verify+0xc3/0xcb
Allocated by task 21065:
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:436 [inline]
____kasan_kmalloc mm/kasan/common.c:515 [inline]
____kasan_kmalloc mm/kasan/common.c:474 [inline]
__kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:524
kmalloc include/linux/slab.h:581 [inline]
kzalloc include/linux/slab.h:714 [inline]
tomoyo_find_next_domain+0xde/0x1f80 security/tomoyo/domain.c:710
tomoyo_bprm_check_security security/tomoyo/tomoyo.c:101 [inline]
tomoyo_bprm_check_security+0x121/0x1a0 security/tomoyo/tomoyo.c:91
security_bprm_check+0x45/0xa0 security/security.c:866
search_binary_handler fs/exec.c:1714 [inline]
exec_binprm fs/exec.c:1767 [inline]
bprm_execve fs/exec.c:1836 [inline]
bprm_execve+0x732/0x1970 fs/exec.c:1798
do_execveat_common+0x727/0x890 fs/exec.c:1941
do_execve fs/exec.c:2011 [inline]
__do_sys_execve fs/exec.c:2087 [inline]
__se_sys_execve fs/exec.c:2082 [inline]
__x64_sys_execve+0x8f/0xc0 fs/exec.c:2082
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Last potentially related work creation:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
__kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348
call_rcu+0x99/0x790 kernel/rcu/tree.c:3074
inetdev_destroy net/ipv4/devinet.c:331 [inline]
inetdev_event+0xd4f/0x15d0 net/ipv4/devinet.c:1604
notifier_call_chain+0xb5/0x200 kernel/notifier.c:84
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1938
call_netdevice_notifiers_extack net/core/dev.c:1976 [inline]
call_netdevice_notifiers net/core/dev.c:1990 [inline]
unregister_netdevice_many+0x92e/0x1890 net/core/dev.c:10751
ip_tunnel_delete_nets+0x39f/0x5b0 net/ipv4/ip_tunnel.c:1123
ops_exit_list+0x125/0x170 net/core/net_namespace.c:167
cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Second to last potentially related work creation:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
__kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348
insert_work+0x48/0x350 kernel/workqueue.c:1358
__queue_work+0x62e/0x1140 kernel/workqueue.c:1517
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1461 [inline]
__run_timers.part.0+0x4a6/0xa30 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
The buggy address belongs to the object at ffff8880653fb800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 184 bytes inside of
512-byte region [ffff8880653fb800, ffff8880653fba00)
The buggy address belongs to the physical page:
page:ffffea000194fe00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880653fa400 pfn:0x653f8
head:ffffea000194fe00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea000193f208 ffffea0001938508 ffff888010c41c80
raw: ffff8880653fa400 000000000010000a 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3661, tgid 3661 (syz-executor.3), ts 46244470138, free_ts 42084061329
prep_new_page mm/page_alloc.c:2438 [inline]
get_page_from_freelist+0xba2/0x3df0 mm/page_alloc.c:4179
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5405
alloc_pages+0x1aa/0x310 mm/mempolicy.c:2262
alloc_slab_page mm/slub.c:1799 [inline]
allocate_slab+0x26c/0x3c0 mm/slub.c:1944
new_slab mm/slub.c:2004 [inline]
___slab_alloc+0x8df/0xf20 mm/slub.c:3005
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3092
slab_alloc_node mm/slub.c:3183 [inline]
__kmalloc_node_track_caller+0x2cb/0x360 mm/slub.c:4947
kmalloc_reserve net/core/skbuff.c:354 [inline]
__alloc_skb+0xde/0x340 net/core/skbuff.c:426
alloc_skb include/linux/skbuff.h:1300 [inline]
nlmsg_new include/net/netlink.h:953 [inline]
inet_netconf_notify_devconf+0xdd/0x260 net/ipv4/devinet.c:2103
__devinet_sysctl_register+0x1c5/0x280 net/ipv4/devinet.c:2594
devinet_sysctl_register net/ipv4/devinet.c:2628 [inline]
devinet_sysctl_register+0x160/0x230 net/ipv4/devinet.c:2618
inetdev_init+0x286/0x580 net/ipv4/devinet.c:279
inetdev_event+0xa8a/0x15d0 net/ipv4/devinet.c:1536
notifier_call_chain+0xb5/0x200 kernel/notifier.c:84
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1938
call_netdevice_notifiers_extack net/core/dev.c:1976 [inline]
call_netdevice_notifiers net/core/dev.c:1990 [inline]
register_netdevice+0x109e/0x15b0 net/core/dev.c:9994
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1353 [inline]
free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1403
free_unref_page_prepare mm/page_alloc.c:3325 [inline]
free_unref_page_list+0x18f/0xf60 mm/page_alloc.c:3457
release_pages+0xff1/0x2290 mm/swap.c:978
tlb_batch_pages_flush mm/mmu_gather.c:50 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:243 [inline]
tlb_flush_mmu mm/mmu_gather.c:250 [inline]
tlb_finish_mmu+0x165/0x8c0 mm/mmu_gather.c:341
zap_page_range+0x37e/0x4a0 mm/memory.c:1672
madvise_dontneed_single_vma mm/madvise.c:777 [inline]
madvise_dontneed_free mm/madvise.c:860 [inline]
madvise_vma_behavior+0xfd2/0x1cf0 mm/madvise.c:999
madvise_walk_vmas+0x1d5/0x2d0 mm/madvise.c:1221
do_madvise mm/madvise.c:1399 [inline]
do_madvise+0x2d4/0x3c0 mm/madvise.c:1357
__do_sys_madvise mm/madvise.c:1412 [inline]
__se_sys_madvise mm/madvise.c:1410 [inline]
__x64_sys_madvise+0xa6/0x110 mm/madvise.c:1410
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Memory state around the buggy address:
ffff8880653fb780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880653fb800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880653fb880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880653fb900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880653fb980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 89 de mov %ebx,%esi
2: e8 8d e1 17 f8 callq 0xf817e194
7: 84 db test %bl,%bl
9: 75 ac jne 0xffffffb7
b: e8 a4 dd 17 f8 callq 0xf817ddb4
10: e8 df 24 1e f8 callq 0xf81e24f4
15: eb 0c jmp 0x23
17: e8 98 dd 17 f8 callq 0xf817ddb4
1c: 0f 00 2d 01 60 d1 00 verw 0xd16001(%rip) # 0xd16024
23: e8 8c dd 17 f8 callq 0xf817ddb4
28: fb sti
29: f4 hlt
* 2a: 9c pushfq <-- trapping instruction
2b: 5b pop %rbx
2c: 81 e3 00 02 00 00 and $0x200,%ebx
32: fa cli
33: 31 ff xor %edi,%edi
35: 48 89 de mov %rbx,%rsi
38: e8 07 e0 17 f8 callq 0xf817e044
3d: 48 85 db test %rbx,%rbx