================================================================== BUG: KCSAN: data-race in do_wait / watchdog read to 0xffff888106f0c050 of 8 bytes by task 1061 on cpu 1: check_hung_uninterruptible_tasks kernel/hung_task.c:197 [inline] watchdog+0x2c3/0x7c0 kernel/hung_task.c:289 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 write to 0xffff888106f0c050 of 8 bytes by task 7946 on cpu 0: do_wait+0x1f9/0x4c0 kernel/exit.c:1490 kernel_wait4+0x156/0x240 kernel/exit.c:1639 __do_sys_wait4+0xea/0x100 kernel/exit.c:1651 __se_sys_wait4 kernel/exit.c:1647 [inline] __x64_sys_wait4+0x5e/0x80 kernel/exit.c:1647 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: 0 PID: 7946 Comm: syz-executor.4 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: 0 PID: 7946 Comm: syz-executor.4 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 do_wait+0x1f9/0x4c0 kernel/exit.c:1490 kernel_wait4+0x156/0x240 kernel/exit.c:1639 __do_sys_wait4+0xea/0x100 kernel/exit.c:1651 __se_sys_wait4 kernel/exit.c:1647 [inline] __x64_sys_wait4+0x5e/0x80 kernel/exit.c:1647 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x41405a Code: 0f 83 6a 18 00 00 c3 66 0f 1f 84 00 00 00 00 00 8b 05 be 3f 66 00 85 c0 75 36 45 31 d2 48 63 d2 48 63 ff b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 d4 ff ff ff f7 RSP: 002b:00007ffd2a92e708 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 00000000000793f3 RCX: 000000000041405a RDX: 0000000040000001 RSI: 00007ffd2a92e740 RDI: ffffffffffffffff RBP: 00000000000005a2 R08: 0000000000000001 R09: 000000000253b940 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000001c R13: 00007ffd2a92e740 R14: 000000000007925f R15: 00007ffd2a92e750 Kernel Offset: disabled Rebooting in 86400 seconds..