================================================================== BUG: KCSAN: data-race in schedule_hrtimeout_range_clock / watchdog read to 0xffff88812a8ec010 of 8 bytes by task 1061 on cpu 0: 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 0xffff88812a8ec010 of 8 bytes by task 7177 on cpu 1: schedule_hrtimeout_range_clock+0x14e/0x1e0 kernel/time/hrtimer.c:2132 schedule_hrtimeout_range+0x34/0x50 kernel/time/hrtimer.c:2172 poll_schedule_timeout.constprop.0+0x75/0xc0 fs/select.c:243 do_select+0xd7f/0x1020 fs/select.c:603 core_sys_select+0x381/0x550 fs/select.c:677 do_pselect.constprop.0+0x11d/0x160 fs/select.c:759 __do_sys_pselect6 fs/select.c:784 [inline] __se_sys_pselect6 fs/select.c:769 [inline] __x64_sys_pselect6+0x12e/0x170 fs/select.c:769 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: 7177 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #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: 7177 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #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/0x10 kernel/kcsan/report.c:302 __kcsan_setup_watchpoint+0x32e/0x4a0 kernel/kcsan/core.c:411 __tsan_write8 kernel/kcsan/kcsan.c:36 [inline] __tsan_write8+0x32/0x40 kernel/kcsan/kcsan.c:36 schedule_hrtimeout_range_clock+0x14e/0x1e0 kernel/time/hrtimer.c:2132 schedule_hrtimeout_range+0x34/0x50 kernel/time/hrtimer.c:2172 poll_schedule_timeout.constprop.0+0x75/0xc0 fs/select.c:243 do_select+0xd7f/0x1020 fs/select.c:603 core_sys_select+0x381/0x550 fs/select.c:677 do_pselect.constprop.0+0x11d/0x160 fs/select.c:759 __do_sys_pselect6 fs/select.c:784 [inline] __se_sys_pselect6 fs/select.c:769 [inline] __x64_sys_pselect6+0x12e/0x170 fs/select.c:769 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ac23 Code: 48 89 44 24 08 bf 00 00 00 00 be 00 00 00 00 ba 00 00 00 00 41 ba 00 00 00 00 49 89 e0 41 b9 00 00 00 00 b8 0e 01 00 00 0f 05 <48> 8b 6c 24 10 48 83 c4 18 c3 cc cc cc b8 ba 00 00 00 0f 05 89 44 RSP: 002b:000000c4202cfe38 EFLAGS: 00000206 ORIG_RAX: 000000000000010e RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000045ac23 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000c4202cfe48 R08: 000000c4202cfe38 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 000000c420904000 R13: 00000000000000da R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..