==================================================================
BUG: KCSAN: data-race in packet_do_bind / packet_getname

write to 0xffff8881220e04c4 of 4 bytes by task 13641 on cpu 1:
 packet_do_bind+0x1c5/0x600 net/packet/af_packet.c:3155
 packet_bind+0x9f/0xe0 net/packet/af_packet.c:3219
 __sys_bind+0x1ac/0x1e0 net/socket.c:1662
 __do_sys_bind net/socket.c:1673 [inline]
 __se_sys_bind net/socket.c:1671 [inline]
 __x64_sys_bind+0x48/0x60 net/socket.c:1671
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff8881220e04c4 of 4 bytes by task 13643 on cpu 0:
 packet_getname+0x62/0x1b0 net/packet/af_packet.c:3489
 __sys_getsockname+0xa4/0x160 net/socket.c:1910
 __do_sys_getsockname net/socket.c:1925 [inline]
 __se_sys_getsockname net/socket.c:1922 [inline]
 __x64_sys_getsockname+0x48/0x60 net/socket.c:1922
 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: 0 PID: 13643 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: 0 PID: 13643 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
 packet_getname+0x62/0x1b0 net/packet/af_packet.c:3489
 __sys_getsockname+0xa4/0x160 net/socket.c:1910
 __do_sys_getsockname net/socket.c:1925 [inline]
 __se_sys_getsockname net/socket.c:1922 [inline]
 __x64_sys_getsockname+0x48/0x60 net/socket.c:1922
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c829
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:00007fca184d4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000033
RAX: ffffffffffffffda RBX: 00000000004dd0c0 RCX: 000000000045c829
RDX: 0000000020000000 RSI: 00000000200003c0 RDI: 0000000000000004
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000118 R14: 00000000004c3987 R15: 00007fca184d56d4
Kernel Offset: disabled
Rebooting in 86400 seconds..