==================================================================
BUG: KCSAN: data-race in __register_sysctl_table / rxrpc_lookup_local
write to 0xffff88813af44720 of 8 bytes by task 3805 on cpu 0:
init_header fs/proc/proc_sysctl.c:202 [inline]
new_dir fs/proc/proc_sysctl.c:983 [inline]
get_subdir fs/proc/proc_sysctl.c:1015 [inline]
__register_sysctl_table+0x7a5/0xce0 fs/proc/proc_sysctl.c:1366
register_net_sysctl+0x1b1/0x1c0 net/sysctl_net.c:169
neigh_sysctl_register+0x342/0x3c0 net/core/neighbour.c:3854
devinet_sysctl_register+0x75/0x130 net/ipv4/devinet.c:2624
inetdev_init+0x1f5/0x370 net/ipv4/devinet.c:286
inetdev_event+0x175/0xae0 net/ipv4/devinet.c:1535
notifier_call_chain kernel/notifier.c:87 [inline]
raw_notifier_call_chain+0x53/0xb0 kernel/notifier.c:455
call_netdevice_notifiers_info net/core/dev.c:1944 [inline]
call_netdevice_notifiers_extack net/core/dev.c:1982 [inline]
call_netdevice_notifiers+0xb8/0x120 net/core/dev.c:1996
register_netdevice+0xca3/0xe10 net/core/dev.c:10078
br_dev_newlink+0x23/0xe0 net/bridge/br_netlink.c:1517
rtnl_newlink_create net/core/rtnetlink.c:3407 [inline]
__rtnl_newlink net/core/rtnetlink.c:3624 [inline]
rtnl_newlink+0xf8e/0x16f0 net/core/rtnetlink.c:3637
rtnetlink_rcv_msg+0x811/0x8d0 net/core/rtnetlink.c:6141
netlink_rcv_skb+0x13e/0x250 net/netlink/af_netlink.c:2564
rtnetlink_rcv+0x18/0x20 net/core/rtnetlink.c:6159
netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline]
netlink_unicast+0x58a/0x660 net/netlink/af_netlink.c:1356
netlink_sendmsg+0x666/0x760 net/netlink/af_netlink.c:1932
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg net/socket.c:734 [inline]
____sys_sendmsg+0x38f/0x500 net/socket.c:2476
___sys_sendmsg net/socket.c:2530 [inline]
__sys_sendmsg+0x19a/0x230 net/socket.c:2559
__do_sys_sendmsg net/socket.c:2568 [inline]
__se_sys_sendmsg net/socket.c:2566 [inline]
__x64_sys_sendmsg+0x42/0x50 net/socket.c:2566
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
read to 0xffff88813af44720 of 8 bytes by task 3791 on cpu 1:
rxrpc_lookup_local+0x1bb/0x880
rxrpc_sendmsg+0x323/0x500 net/rxrpc/af_rxrpc.c:543
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg net/socket.c:734 [inline]
sock_write_iter+0x1b7/0x220 net/socket.c:1108
call_write_iter include/linux/fs.h:2186 [inline]
aio_write+0x2e0/0x3c0 fs/aio.c:1600
io_submit_one+0x9b1/0x1220 fs/aio.c:2019
__do_sys_io_submit fs/aio.c:2078 [inline]
__se_sys_io_submit+0x105/0x280 fs/aio.c:2048
__x64_sys_io_submit+0x3f/0x50 fs/aio.c:2048
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
value changed: 0xffff88813af44720 -> 0xffff88813af44778
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3791 Comm: syz-executor.0 Tainted: G W 6.1.0-syzkaller-13781-gaeba12b26c79-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
==================================================================
general protection fault, probably for non-canonical address 0x316567646972fe: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 3791 Comm: syz-executor.0 Tainted: G W 6.1.0-syzkaller-13781-gaeba12b26c79-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:rxrpc_local_cmp_key net/rxrpc/local_object.c:53 [inline]
RIP: 0010:rxrpc_lookup_local+0x100/0x880 net/rxrpc/local_object.c:224
Code: 04 e8 84 6e f8 fc 4c 89 74 24 20 45 0f b7 76 04 66 2e 0f 1f 84 00 00 00 00 00 4d 8d 65 e0 49 8d bd 9c 00 00 00 e8 60 6e f8 fc <41> 0f b7 ad 9c 00 00 00 89 ee 44 29 f6 31 ff e8 6c 4f e5 fc 44 29
RSP: 0018:ffffc90000aefab8 EFLAGS: 00010246
RAX: ffff88813afcca48 RBX: 000000000000004d RCX: ffffffff8442d680
RDX: 0000000000000365 RSI: 0000000000000000 RDI: 00316567646972fe
RBP: 00000000fffffffe R08: 00016567646972ff R09: 0000000000000000
R10: 0001ffffffffffff R11: 0001ffffffffffff R12: 0031656764697242
R13: 0031656764697262 R14: 0000000000000002 R15: ffff888138729000
FS: 00007f6c54d3d700(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6c54d14000 CR3: 000000013a5ca000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
rxrpc_sendmsg+0x323/0x500 net/rxrpc/af_rxrpc.c:543
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg net/socket.c:734 [inline]
sock_write_iter+0x1b7/0x220 net/socket.c:1108
call_write_iter include/linux/fs.h:2186 [inline]
aio_write+0x2e0/0x3c0 fs/aio.c:1600
io_submit_one+0x9b1/0x1220 fs/aio.c:2019
__do_sys_io_submit fs/aio.c:2078 [inline]
__se_sys_io_submit+0x105/0x280 fs/aio.c:2048
__x64_sys_io_submit+0x3f/0x50 fs/aio.c:2048
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6c559ca0d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6c54d3d168 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007f6c55ae9f80 RCX: 00007f6c559ca0d9
RDX: 0000000020000b40 RSI: 0000000000000001 RDI: 00007f6c54d14000
RBP: 00007f6c55a25ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe7c85e93f R14: 00007f6c54d3d300 R15: 0000000000022000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:rxrpc_local_cmp_key net/rxrpc/local_object.c:53 [inline]
RIP: 0010:rxrpc_lookup_local+0x100/0x880 net/rxrpc/local_object.c:224
Code: 04 e8 84 6e f8 fc 4c 89 74 24 20 45 0f b7 76 04 66 2e 0f 1f 84 00 00 00 00 00 4d 8d 65 e0 49 8d bd 9c 00 00 00 e8 60 6e f8 fc <41> 0f b7 ad 9c 00 00 00 89 ee 44 29 f6 31 ff e8 6c 4f e5 fc 44 29
RSP: 0018:ffffc90000aefab8 EFLAGS: 00010246
RAX: ffff88813afcca48 RBX: 000000000000004d RCX: ffffffff8442d680
RDX: 0000000000000365 RSI: 0000000000000000 RDI: 00316567646972fe
RBP: 00000000fffffffe R08: 00016567646972ff R09: 0000000000000000
R10: 0001ffffffffffff R11: 0001ffffffffffff R12: 0031656764697242
R13: 0031656764697262 R14: 0000000000000002 R15: ffff888138729000
FS: 00007f6c54d3d700(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6c54d14000 CR3: 000000013a5ca000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 04 e8 add $0xe8,%al
2: 84 6e f8 test %ch,-0x8(%rsi)
5: fc cld
6: 4c 89 74 24 20 mov %r14,0x20(%rsp)
b: 45 0f b7 76 04 movzwl 0x4(%r14),%r14d
10: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
17: 00 00 00
1a: 4d 8d 65 e0 lea -0x20(%r13),%r12
1e: 49 8d bd 9c 00 00 00 lea 0x9c(%r13),%rdi
25: e8 60 6e f8 fc callq 0xfcf86e8a
* 2a: 41 0f b7 ad 9c 00 00 movzwl 0x9c(%r13),%ebp <-- trapping instruction
31: 00
32: 89 ee mov %ebp,%esi
34: 44 29 f6 sub %r14d,%esi
37: 31 ff xor %edi,%edi
39: e8 6c 4f e5 fc callq 0xfce54faa
3e: 44 rex.R
3f: 29 .byte 0x29