==================================================================
BUG: KCSAN: data-race in rds_connect / rds_getname

read to 0xffff88806df9ad84 of 8 bytes by task 32438 on cpu 0:
 ipv6_addr_any include/net/ipv6.h:640 [inline]
 rds_getname+0x67/0x460 net/rds/af_rds.c:124
 __sys_getpeername+0xb5/0x1d0 net/socket.c:1948
 __do_sys_getpeername net/socket.c:1961 [inline]
 __se_sys_getpeername net/socket.c:1958 [inline]
 __x64_sys_getpeername+0x48/0x60 net/socket.c:1958
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff88806df9ad84 of 16 bytes by task 32436 on cpu 1:
 rds_connect+0x309/0x3a0 net/rds/af_rds.c:619
 __sys_connect_file+0xdc/0xf0 net/socket.c:1859
 __sys_connect+0x11b/0x150 net/socket.c:1876
 __do_sys_connect net/socket.c:1887 [inline]
 __se_sys_connect net/socket.c:1884 [inline]
 __x64_sys_connect+0x48/0x60 net/socket.c:1884
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 32436 Comm: syz-executor.4 Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 32436 Comm: syz-executor.4 Not tainted 5.7.0-rc1-syzkaller #0
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+0x11d/0x187 lib/dump_stack.c:118
 panic+0x210/0x640 kernel/panic.c:221
 kcsan_report.cold+0xc/0x1a kernel/kcsan/report.c:626
 kcsan_setup_watchpoint+0x3fb/0x440 kernel/kcsan/core.c:519
 rds_connect+0x309/0x3a0 net/rds/af_rds.c:619
 __sys_connect_file+0xdc/0xf0 net/socket.c:1859
 __sys_connect+0x11b/0x150 net/socket.c:1876
 __do_sys_connect net/socket.c:1887 [inline]
 __se_sys_connect net/socket.c:1884 [inline]
 __x64_sys_connect+0x48/0x60 net/socket.c:1884
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45ca69
Code: 0d 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd040f7fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00000000004daf80 RCX: 000000000045ca69
RDX: 000000000000001c RSI: 0000000020000000 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000084 R14: 00000000004c3402 R15: 00007fd040f806d4
Kernel Offset: disabled
Rebooting in 86400 seconds..