================================================================== BUG: KCSAN: data-race in packet_do_bind / packet_getname write to 0xffff88808b0d04c4 of 4 bytes by task 6555 on cpu 1: packet_do_bind+0x3d5/0x6f0 net/packet/af_packet.c:3155 packet_bind+0xc3/0xd0 net/packet/af_packet.c:3219 __sys_bind+0x1fd/0x2a0 net/socket.c:1657 __do_sys_bind net/socket.c:1668 [inline] __se_sys_bind net/socket.c:1666 [inline] __x64_sys_bind+0x3d/0x50 net/socket.c:1666 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88808b0d04c4 of 4 bytes by task 6560 on cpu 0: packet_getname+0x5b/0x1a0 net/packet/af_packet.c:3489 __sys_getsockname+0x10a/0x1b0 net/socket.c:1905 __do_sys_getsockname net/socket.c:1920 [inline] __se_sys_getsockname net/socket.c:1917 [inline] __x64_sys_getsockname+0x3e/0x50 net/socket.c:1917 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 6560 Comm: syz-executor.3 Not tainted 5.8.0-rc7-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: 6560 Comm: syz-executor.3 Not tainted 5.8.0-rc7-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:626 kcsan_setup_watchpoint+0x453/0x4d0 kernel/kcsan/core.c:519 packet_getname+0x5b/0x1a0 net/packet/af_packet.c:3489 __sys_getsockname+0x10a/0x1b0 net/socket.c:1905 __do_sys_getsockname net/socket.c:1920 [inline] __se_sys_getsockname net/socket.c:1917 [inline] __x64_sys_getsockname+0x3e/0x50 net/socket.c:1917 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c369 Code: 8d b6 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 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f41a1573c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000033 RAX: ffffffffffffffda RBX: 0000000000004900 RCX: 000000000045c369 RDX: 0000000020000040 RSI: 0000000020000500 RDI: 0000000000000003 RBP: 000000000078bfe0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bfac R13: 00007ffe2c1cff8f R14: 00007f41a15749c0 R15: 000000000078bfac Kernel Offset: disabled Rebooting in 86400 seconds..