Date: Sun, 06 Sep 2020 14:54:51 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 249150] KCSAN reported race conditions Message-ID: <bug-249150-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=249150 Bug ID: 249150 Summary: KCSAN reported race conditions Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: gbe@FreeBSD.org While running a KCSAN-enabled kernel on a recent -CURRENT (r365373) the kernel reports the following race conditions or racy access. Please note that these messages where generated during three boot attempts. CSan: Racy Access [Cpu0 Write Addr=0xfffffe000852d0c8 Size=4 PC=0xffffffff8119730a<tdq_add>] [Cpu1 Read Addr=0xfffffe000852d0c8 Size=4 PC=0xffffffff81198368<sched_idletd>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800fee00320 Size=4 PC=0xffffffff8193cb08<lapic_et_start>] [Cpu1 Write Addr=0xfffff800fee00320 Size=4 PC=0xffffffff8193cb08<lapic_et_start>] CSan: Racy Access [Cpu0 Write Addr=0xffffffff82316a00 Size=8 PC=0xffffffff81167c84<tc_windup>] [Cpu1 Read Addr=0xffffffff82316a00 Size=8 PC=0xffffffff8116633c<binuptime>] CSan: Racy Access [Cpu1 Write Addr=0xfffff800fee00320 Size=4 PC=0xffffffff8193cb08<lapic_et_start>] [Cpu0 Write Addr=0xfffff800fee00320 Size=4 PC=0xffffffff8193cb08<lapic_et_start>] CSan: Racy Access [Cpu0 Read Addr=0xffffffff836310c8 Size=4 PC=0xffffffff8119261a<cpu_search_highest>] [Cpu1 Write Addr=0xffffffff836310c8 Size=4 PC=0xffffffff8119730a<tdq_add>] CSan: Racy Access [Cpu0 Write Addr=0xfffffe0038df5748 Size=4 PC=0xffffffff8116d18e<thread_exit>] [Cpu1 Read Addr=0xfffffe0038df5748 Size=4 PC=0xffffffff811166e9<__mtx_lock_sleep>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800fee00320 Size=4 PC=0xffffffff8193cb08<lapic_et_start>] [Cpu1 Write Addr=0xfffff80CSan: Racy Access [Cpu0 Write Addr=0xffffffff82204027 Size=1 PC=0xffffffff8114c508<vpanic>] [Cpu1 Read Addr=0xffffffff82204027 Size=1 PC=0xffffffff817df03a<cpustop_handler>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800fee00380 Size=4 PC=0xffffffff8193cb61<lapic_et_start>] [Cpu1 Write Addr=0xfffff800fee00380 Size=4 PC=0xffffffff8193cb61<lapic_et_start>] CSan: Racy Access [Cpu1 Write Addr=0xffffffff823167a8 Size=8 PC=0xffffffff81167c71<tc_windup>] [Cpu0 Read Addr=0xffffffff823167a8 Size=8 PC=0xffffffff81168732<cpu_tick_calibration>] CSan: Racy Access [Cpu1 Write Addr=0xfffff800fee00320 Size=4 PC=0xffffffff8193cb08<lapic_et_start>] [Cpu0 Write Addr=0xfffff800fee00320 Size=4 PC=0xffffffff8193cb08<lapic_et_start>] CSan: Racy Access [Cpu1 Write Addr=0xfffff800fee000b0 Size=4 PC=0xffffffff8193a170<native_lapic_eoi>] [Cpu0 Write Addr=0xfffff800fee000b0 Size=4 PC=0xffffffff8193a170<native_lapic_eoi>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800fee000b0 Size=4 PC=0xffffffff8193a170<native_lapic_eoi>] [Cpu1 Write Addr=0xfffff800fee000b0 Size=4 PC=0xffffffff8193a170<native_lapic_eoi>] CSan: Racy Access [Cpu1 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] [Cpu0 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] CSan: Racy Access [Cpu1 Write Addr=0xfffff800f6b22368 Size=8 PC=0xffffffff811fd33e<witness_lock>] [Cpu0 Write Addr=0xfffff800f6b22368 Size=8 PC=0xffffffff811fd33e<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b217f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b217f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b217f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b217f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b217f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b217f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b219e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b219e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b219e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b219e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] CSan: Racy Access [Cpu1 Write Addr=0xfffff800f6b219e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] [Cpu0 Write Addr=0xfffff800f6b219e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b219e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b219e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b217e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b217e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xffffffff836310dc Size=1 PC=0xffffffff81196f35<sched_choose>] [Cpu1 Read Addr=0xffffffff836310dc Size=1 PC=0xffffffff8119225b<cpu_search_lowest>] CSan: Racy Access [Cpu1 Write Addr=0xfffff800f6b217e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] [Cpu0 Write Addr=0xfffff800f6b217e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] CSan: Racy Access [Cpu1 Write Addr=0xffffffff823167a8 Size=8 PC=0xffffffff81167c71<tc_windup>] [Cpu0 Read Addr=0xffffffff823167a8 Size=8 PC=0xffffffff81168706<cpu_tick_calibration>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b219f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b219e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b219e8 Size=8 PC=0xffffffff811fd33e<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffff800f6b21968 Size=8 PC=0xffffffff811fd33e<witness_lock>] [Cpu1 Write Addr=0xfffff800f6b21968 Size=8 PC=0xffffffff811fd33e<witness_lock>] CSan: Racy Access [Cpu0 Write Addr=0xfffffe000852d0c8 Size=4 PC=0xffffffff8119730a<tdq_add>] [Cpu1 Read Addr=0xfffffe000852d0c8 Size=4 PC=0xffffffff81196e8d<sched_runnable>] CSan: Racy Access [Cpu1 Write Addr=0xfffff800f6b217f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] [Cpu0 Write Addr=0xfffff800f6b217f0 Size=4 PC=0xffffffff811fd34f<witness_lock>] -- You are receiving this mail because: You are the assignee for the bug.help
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