netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'.
==================================================================
BUG: KCSAN: data-race in do_splice / ksys_write
write to 0xffff888122d45068 of 8 bytes by task 15042 on cpu 0:
do_splice+0xb2e/0xbe0 fs/splice.c:1189
__do_sys_splice fs/splice.c:1425 [inline]
__se_sys_splice fs/splice.c:1405 [inline]
__x64_sys_splice+0x20a/0x220 fs/splice.c:1405
do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x44/0xa9
write to 0xffff888122d45068 of 8 bytes by task 15046 on cpu 1:
ksys_write+0x101/0x1b0 fs/read_write.c:613
__do_sys_write fs/read_write.c:623 [inline]
__se_sys_write fs/read_write.c:620 [inline]
__x64_sys_write+0x4c/0x60 fs/read_write.c:620
do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 15046 Comm: syz-executor.0 Not tainted 5.4.0-rc6+ #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: 15046 Comm: syz-executor.0 Not tainted 5.4.0-rc6+ #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+0xf5/0x159 lib/dump_stack.c:113
panic+0x210/0x640 kernel/panic.c:221
kcsan_report.cold+0xc/0xe kernel/kcsan/report.c:302
kcsan_setup_watchpoint+0x3fe/0x410 kernel/kcsan/core.c:357
check_access kernel/kcsan/core.c:409 [inline]
__tsan_unaligned_write8+0x143/0x1f0 kernel/kcsan/core.c:530
ksys_write+0x101/0x1b0 fs/read_write.c:613
__do_sys_write fs/read_write.c:623 [inline]
__se_sys_write fs/read_write.c:620 [inline]
__x64_sys_write+0x4c/0x60 fs/read_write.c:620
do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45a219
Code: ad 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f254cd2bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a219
RDX: 0000000000000024 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f254cd2c6d4
R13: 00000000004c6cf5 R14: 00000000004e2238 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..