IPv6: NLM_F_REPLACE set, but no existing node found!
IPv6: NLM_F_REPLACE set, but no existing node found!
==================================================================
BUG: KASAN: use-after-free in __xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2019 [inline]
BUG: KASAN: use-after-free in xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2053 [inline]
BUG: KASAN: use-after-free in xfrm_policy_lookup_bytype+0xd27/0xdb0 net/xfrm/xfrm_policy.c:2113
Read of size 4 at addr ffff8880a847c9f4 by task syz-executor3/16349
CPU: 1 PID: 16349 Comm: syz-executor3 Not tainted 5.0.0-rc3+ #24
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+0x1db/0x2d0 lib/dump_stack.c:113
print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187
kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
__asan_report_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:134
__xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2019 [inline]
xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2053 [inline]
xfrm_policy_lookup_bytype+0xd27/0xdb0 net/xfrm/xfrm_policy.c:2113
xfrm_policy_lookup+0x7e/0x90 net/xfrm/xfrm_policy.c:2145
__xfrm_policy_check+0x1426/0x2b00 net/xfrm/xfrm_policy.c:3354
__xfrm_policy_check2 include/net/xfrm.h:1166 [inline]
xfrm_policy_check include/net/xfrm.h:1175 [inline]
xfrm6_policy_check include/net/xfrm.h:1185 [inline]
udpv6_queue_rcv_one_skb+0x532/0x1750 net/ipv6/udp.c:615
udpv6_queue_rcv_skb+0x128/0x730 net/ipv6/udp.c:699
udp6_unicast_rcv_skb.isra.0+0x151/0x2f0 net/ipv6/udp.c:843
__udp6_lib_rcv+0xaeb/0x30d0 net/ipv6/udp.c:924
udpv6_rcv+0x22/0x30 net/ipv6/udp.c:1026
ip6_protocol_deliver_rcu+0x3aa/0x1940 net/ipv6/ip6_input.c:394
ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:434
NF_HOOK include/linux/netfilter.h:289 [inline]
NF_HOOK include/linux/netfilter.h:283 [inline]
ip6_input+0xf9/0x600 net/ipv6/ip6_input.c:443
dst_input include/net/dst.h:450 [inline]
ip6_rcv_finish+0x177/0x330 net/ipv6/ip6_input.c:76
NF_HOOK include/linux/netfilter.h:289 [inline]
NF_HOOK include/linux/netfilter.h:283 [inline]
ipv6_rcv+0x113/0x650 net/ipv6/ip6_input.c:272
__netif_receive_skb_one_core+0x160/0x210 net/core/dev.c:4973
__netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083
process_backlog+0x206/0x750 net/core/dev.c:5923
napi_poll net/core/dev.c:6346 [inline]
net_rx_action+0x76d/0x1930 net/core/dev.c:6412
__do_softirq+0x30b/0xb11 kernel/softirq.c:292
do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1027
do_softirq.part.0+0x11a/0x170 kernel/softirq.c:337
do_softirq kernel/softirq.c:329 [inline]
__local_bh_enable_ip+0x211/0x270 kernel/softirq.c:189
local_bh_enable include/linux/bottom_half.h:32 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:696 [inline]
ip6_finish_output2+0xca9/0x28e0 net/ipv6/ip6_output.c:121
ip6_finish_output+0x577/0xc30 net/ipv6/ip6_output.c:154
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
ip6_output+0x23c/0xa00 net/ipv6/ip6_output.c:171
dst_output include/net/dst.h:444 [inline]
ip6_local_out+0xc4/0x1b0 net/ipv6/output_core.c:176
ip6_send_skb+0xbb/0x350 net/ipv6/ip6_output.c:1727
udp_v6_send_skb.isra.0+0x839/0x14f0 net/ipv6/udp.c:1177
IPVS: ftp: loaded support on port[0] = 21
udpv6_sendmsg+0x2ba8/0x3570 net/ipv6/udp.c:1474
inet_sendmsg+0x1af/0x740 net/ipv4/af_inet.c:798
sock_sendmsg_nosec net/socket.c:621 [inline]
sock_sendmsg+0xdd/0x130 net/socket.c:631
___sys_sendmsg+0x409/0x910 net/socket.c:2116
__sys_sendmmsg+0x246/0x730 net/socket.c:2211
__do_sys_sendmmsg net/socket.c:2240 [inline]
__se_sys_sendmmsg net/socket.c:2237 [inline]
__x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2237
do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458099
Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
kasan: CONFIG_KASAN_INLINE enabled
RSP: 002b:00007f25b8423c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458099
RDX: 00000000000004ff RSI: 00000000200092c0 RDI: 0000000000000004
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25b84246d4
R13: 00000000004c5000 R14: 00000000004d8bc8 R15: 00000000ffffffff
Allocated by task 7643:
save_stack+0x45/0xd0 mm/kasan/common.c:73
set_track mm/kasan/common.c:85 [inline]
__kasan_kmalloc mm/kasan/common.c:496 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469
kasan: GPF could be caused by NULL-ptr deref or user memory access
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:504
kmem_cache_alloc_trace+0x151/0x760 mm/slab.c:3609
kmalloc include/linux/slab.h:545 [inline]
syslog_print kernel/printk/printk.c:1302 [inline]
do_syslog kernel/printk/printk.c:1475 [inline]
do_syslog+0x5aa/0x17c0 kernel/printk/printk.c:1449
kmsg_read+0x8f/0xc0 fs/proc/kmsg.c:40
proc_reg_read+0x29a/0x3c0 fs/proc/inode.c:229
__vfs_read+0x116/0xb20 fs/read_write.c:416
general protection fault: 0000 [#1] PREEMPT SMP KASAN
vfs_read+0x194/0x3e0 fs/read_write.c:452
CPU: 0 PID: 16393 Comm: syz-executor3 Not tainted 5.0.0-rc3+ #24
ksys_read+0x105/0x260 fs/read_write.c:578
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
__do_sys_read fs/read_write.c:588 [inline]
__se_sys_read fs/read_write.c:586 [inline]
__x64_sys_read+0x73/0xb0 fs/read_write.c:586
RIP: 0010:__xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2019 [inline]
RIP: 0010:xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2053 [inline]
RIP: 0010:xfrm_policy_lookup_bytype+0x8fc/0xdb0 net/xfrm/xfrm_policy.c:2113
do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
Code: 89 f7 48 89 85 08 fe ff ff 48 c1 e8 03 4c 01 e0 48 89 85 18 fe ff ff e8 a2 84 c1 fa 4c 8d b3 b4 00 00 00 4c 89 f0 48 c1 e8 03 <42> 0f b6 14 20 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RSP: 0018:ffff8880ae606f20 EFLAGS: 00010207
RAX: 06872726c62645db RBX: 3439393631322e2a RCX: ffffffff86c07d07
Freed by task 7643:
RDX: 0000000000000100 RSI: ffffffff86c07a4e RDI: 0000000000000007
save_stack+0x45/0xd0 mm/kasan/common.c:73
RBP: ffff8880ae607128 R08: ffff888063e0c080 R09: 0000000000000000
set_track mm/kasan/common.c:85 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:458
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
kasan_slab_free+0xe/0x10 mm/kasan/common.c:466
R13: 00000000fffffffd R14: 3439393631322ede R15: 00000000ffffffff
__cache_free mm/slab.c:3487 [inline]
kfree+0xcf/0x230 mm/slab.c:3806
FS: 00007f25b837f700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
syslog_print kernel/printk/printk.c:1361 [inline]
do_syslog kernel/printk/printk.c:1475 [inline]
do_syslog+0x8c8/0x17c0 kernel/printk/printk.c:1449
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kmsg_read+0x8f/0xc0 fs/proc/kmsg.c:40
CR2: 00007f25b837edb8 CR3: 00000000a8a83000 CR4: 00000000001406f0
proc_reg_read+0x29a/0x3c0 fs/proc/inode.c:229
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
__vfs_read+0x116/0xb20 fs/read_write.c:416
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
vfs_read+0x194/0x3e0 fs/read_write.c:452
Call Trace:
ksys_read+0x105/0x260 fs/read_write.c:578
__do_sys_read fs/read_write.c:588 [inline]
__se_sys_read fs/read_write.c:586 [inline]
__x64_sys_read+0x73/0xb0 fs/read_write.c:586
do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff8880a847c940
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 180 bytes inside of
1024-byte region [ffff8880a847c940, ffff8880a847cd40)
xfrm_policy_lookup+0x7e/0x90 net/xfrm/xfrm_policy.c:2145
The buggy address belongs to the page:
__xfrm_policy_check+0x1426/0x2b00 net/xfrm/xfrm_policy.c:3354
page:ffffea0002a11f00 count:1 mapcount:0 mapping:ffff88812c3f0ac0 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea0002a12588 ffffea0002a58188 ffff88812c3f0ac0
raw: 0000000000000000 ffff8880a847c040 0000000100000007 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880a847c880: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff8880a847c900: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
__xfrm_policy_check2 include/net/xfrm.h:1170 [inline]
xfrm_policy_check include/net/xfrm.h:1175 [inline]
xfrm6_policy_check include/net/xfrm.h:1185 [inline]
__udp6_lib_rcv+0x2600/0x30d0 net/ipv6/udp.c:930
>ffff8880a847c980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880a847ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880a847ca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================