==================================================================
BUG: KCSAN: data-race in packet_do_bind / packet_getname
write to 0xffff888095922cd4 of 4 bytes by task 27685 on cpu 1:
packet_do_bind+0x3d5/0x6f0 net/packet/af_packet.c:3160
packet_bind+0xc3/0xd0 net/packet/af_packet.c:3224
__sys_bind+0x1fd/0x2a0 net/socket.c:1656
__do_sys_bind net/socket.c:1667 [inline]
__se_sys_bind net/socket.c:1665 [inline]
__x64_sys_bind+0x3d/0x50 net/socket.c:1665
do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
read to 0xffff888095922cd4 of 4 bytes by task 27686 on cpu 0:
packet_getname+0xba/0x1a0 net/packet/af_packet.c:3498
__sys_getsockname+0x10a/0x1b0 net/socket.c:1902
__do_sys_getsockname net/socket.c:1917 [inline]
__se_sys_getsockname net/socket.c:1914 [inline]
__x64_sys_getsockname+0x3e/0x50 net/socket.c:1914
do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 27686 Comm: syz-executor.4 Not tainted 5.9.0-rc3-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: 27686 Comm: syz-executor.4 Not tainted 5.9.0-rc3-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+0x10f/0x19d lib/dump_stack.c:118
panic+0x207/0x64a kernel/panic.c:231
kcsan_report+0x684/0x690 kernel/kcsan/report.c:630
kcsan_setup_watchpoint+0x41e/0x4a0 kernel/kcsan/core.c:540
packet_getname+0xba/0x1a0 net/packet/af_packet.c:3498
__sys_getsockname+0x10a/0x1b0 net/socket.c:1902
__do_sys_getsockname net/socket.c:1917 [inline]
__se_sys_getsockname net/socket.c:1914 [inline]
__x64_sys_getsockname+0x3e/0x50 net/socket.c:1914
do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2ee01d5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000033
RAX: ffffffffffffffda RBX: 0000000000004900 RCX: 000000000045d5b9
RDX: 0000000020000000 RSI: 00000000200003c0 RDI: 0000000000000004
RBP: 000000000118d020 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cfec
R13: 00007fff46e927df R14: 00007f2ee01d69c0 R15: 000000000118cfec
Kernel Offset: disabled
Rebooting in 86400 seconds..