Date: Wed, 03 Aug 2022 14:15:17 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 265598] page fault under fork in kernel Message-ID: <bug-265598-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D265598 Bug ID: 265598 Summary: page fault under fork in kernel Product: Base System Version: 12.2-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: heas@shrubbery.net I experience these periodic page fault crashes on this one machine. I think this began with 12.2, currently at p15. I am not aware of a specific trigger and do not currently have a large enou= gh dumpdev to capture a dump. 12.2.p?: Fatal trap 12: page fault while in kernel mode cpuid =3D 3; apic id =3D 03 fault virtual address =3D 0x80c83670 fault code =3D supervisor read instruction, page not present instruction pointer =3D 0x20:0x80c83670 stack pointer =3D 0x28:0xfffffe0000547ab8 frame pointer =3D 0x28:0xfffffe0000547ae0 code segment =3D base 0x0, limit 0xfffff, type 0x1b =3D DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags =3D interrupt enabled, resume, IOPL =3D 0 current process =3D 0 (if_io_tqg_3) trap number =3D 12 panic: page fault cpuid =3D 3 time =3D 1626772337 KDB: stack backtrace: #0 0xffffffff80bb5e35 at kdb_backtrace+0x65 #1 0xffffffff80b6a0eb at vpanic+0x17b #2 0xffffffff80b69f63 at panic+0x43 #3 0xffffffff8103d941 at trap_fatal+0x391 #4 0xffffffff8103d99f at trap_pfault+0x4f #5 0xffffffff8103cfe6 at trap+0x286 #6 0xffffffff81015068 at calltrap+0x8 #7 0xffffffff80c81608 at _task_fn_tx+0xa8 #8 0xffffffff80bb4a01 at gtaskqueue_run_locked+0x121 #9 0xffffffff80bb46c6 at gtaskqueue_thread_loop+0xb6 #10 0xffffffff80b2b94e at fork_exit+0x7e #11 0xffffffff8101609e at fork_trampoline+0xe Uptime: 1d7h6m15s 12.2p10: Fatal trap 12: page fault while in kernel mode cpuid =3D 3; apic id =3D 03 fault virtual address =3D 0x80c83670 fault code =3D supervisor read instruction, page not present instruction pointer =3D 0x20:0x80c83670 stack pointer =3D 0x28:0xfffffe0000547ab8 frame pointer =3D 0x28:0xfffffe0000547ae0 code segment =3D base 0x0, limit 0xfffff, type 0x1b =3D DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags =3D interrupt enabled, resume, IOPL =3D 0 current process =3D 0 (if_io_tqg_3) trap number =3D 12 panic: page fault cpuid =3D 3 time =3D 1638558873 KDB: stack backtrace: #0 0xffffffff80bb5e35 at kdb_backtrace+0x65 #1 0xffffffff80b6a0eb at vpanic+0x17b #2 0xffffffff80b69f63 at panic+0x43 #3 0xffffffff8103d941 at trap_fatal+0x391 #4 0xffffffff8103d99f at trap_pfault+0x4f #5 0xffffffff8103cfe6 at trap+0x286 #6 0xffffffff81015068 at calltrap+0x8 #7 0xffffffff80c81608 at _task_fn_tx+0xa8 #8 0xffffffff80bb4a01 at gtaskqueue_run_locked+0x121 #9 0xffffffff80bb46c6 at gtaskqueue_thread_loop+0xb6 #10 0xffffffff80b2b94e at fork_exit+0x7e #11 0xffffffff8101609e at fork_trampoline+0xe Uptime: 61d1h37m40s 12.2.p15: Fatal trap 12: page fault while in kernel mode cpuid =3D 3; apic id =3D 03 fault virtual address =3D 0x80c836c0 fault code =3D supervisor read instruction, page not present instruction pointer =3D 0x20:0x80c836c0 stack pointer =3D 0x28:0xfffffe0000542ab8 frame pointer =3D 0x28:0xfffffe0000542ae0 code segment =3D base 0x0, limit 0xfffff, type 0x1b =3D DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags =3D interrupt enabled, resume, IOPL =3D 0 current process =3D 0 (if_io_tqg_3) trap number =3D 12 panic: page fault cpuid =3D 3 time =3D 1659432012 KDB: stack backtrace: #0 0xffffffff80bb5e85 at kdb_backtrace+0x65 #1 0xffffffff80b6a13b at vpanic+0x17b #2 0xffffffff80b69fb3 at panic+0x43 #3 0xffffffff8103d8e1 at trap_fatal+0x391 #4 0xffffffff8103d93f at trap_pfault+0x4f #5 0xffffffff8103cf86 at trap+0x286 #6 0xffffffff81015148 at calltrap+0x8 #7 0xffffffff80c81658 at _task_fn_tx+0xa8 #8 0xffffffff80bb4a51 at gtaskqueue_run_locked+0x121 #9 0xffffffff80bb4716 at gtaskqueue_thread_loop+0xb6 #10 0xffffffff80b2b99e at fork_exit+0x7e #11 0xffffffff8101617e at fork_trampoline+0xe Uptime: 30d14h26m51s I do periodically experience an ECC correctable error that time-wise does n= ot appear to be correlated to these page faults, but perhaps I am wrong. eg: MCA: Bank 11, Status 0x8c000050000800c2 MCA: Global Cap 0x0000000007000c16, Status 0x0000000000000000 MCA: Vendor "GenuineIntel", ID 0x306f2, APIC ID 0 MCA: CPU 0 COR (1) MS channel 2 memory error MCA: Address 0x952ef9e80 MCA: Misc 0x90840100010208c MCA: Misc 0x90840100010208c MCA: Bank 9, Status 0x8c00004c000800c0 MCA: Global Cap 0x0000000007000c16, Status 0x0000000000000000 MCA: Vendor "GenuineIntel", ID 0x306f2, APIC ID 27 MCA: CPU 23 COR (1) MS channel 0 memory error MCA: Address 0x167b065100 MCA: Misc 0x90000020002188c MCA: Misc 0x90840100010208c MCA: Bank 11, Status 0x8c000050000800c2 MCA: Global Cap 0x0000000007000c16, Status 0x0000000000000000 MCA: Vendor "GenuineIntel", ID 0x306f2, APIC ID 0 MCA: CPU 0 COR (1) MS channel 2 memory error MCA: Address 0x952ef9e80 MCA: Misc 0x90840100010208c --=20 You are receiving this mail because: You are the assignee for the bug.=
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