Date: Fri, 13 Dec 2024 16:14:47 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 283312] Kernel crash in sched_switch Message-ID: <bug-283312-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D283312 Bug ID: 283312 Summary: Kernel crash in sched_switch Product: Base System Version: 14.2-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: alexey@ocaml.nl I have no idea how to reproduce this, but since upgrading to 14.2-RELEASE, I have been getting crashes occasionally. The same computer was running before 13.2-RELEASE, 14.0-RELEASE, 14.1-RELEASE, and 14-STABLE, and I saw no such crashes. What I see in dmesg output is: Fatal trap 12: page fault while in user mode cpuid =3D 6; apic id =3D 06 fault virtual address =3D 0x542350 fault code =3D user read instruction, reserved bits in PTE instruction pointer =3D 0x43:0x542350 stack pointer =3D 0x3b:0x8219fdae8 frame pointer =3D 0x3b:0x8219fdb90 code segment =3D base 0x0, limit 0xfffff, type 0x1b =3D DPL 3, pres 1, long 1, def32 0, gran 1 processor eflags =3D interrupt enabled, resume, IOPL =3D 0 current process =3D 96419 (pkg-static) rdi: 00000008219fe5b0 rsi: 00000008219fdc78 rdx: 00000008219fdc90 rcx: 0000000000000041 r8: 0000000000000081 r9: 0000000000000000 rax: 00002fae2698c588 rbx: 00000008219fdbe8 rbp: 00000008219fdb90 r10: 00000008219fdc78 r11: 000000000000004e r12: 0000000000000103 r13: 00000008219fdd18 r14: 00000008219fdc78 r15: 00000008219fdc90 trap number =3D 12 panic: page fault cpuid =3D 6 time =3D 1734089856 KDB: stack backtrace: #0 0xffffffff80b8b89d at kdb_backtrace+0x5d #1 0xffffffff80b3dc01 at vpanic+0x131 #2 0xffffffff80b3dac3 at panic+0x43 #3 0xffffffff81025a0b at trap_fatal+0x40b #4 0xffffffff81025a56 at trap_pfault+0x46 #5 0xffffffff810251fb at trap+0x4ab #6 0xffffffff80ffc398 at calltrap+0x8 Uptime: 9d17h46m22s Here is what kgdb says: sched_switch (td=3Dtd@entry=3D0xffffffff81b6eb20 <thread0_st>, flags=3Dflags@entry=3D259) at /usr/src/sys/kern/sched_ule.c:2290 2290 cpuid =3D td->td_oncpu =3D PCPU_GET(cpuid); (kgdb) backtrace #0 sched_switch (td=3Dtd@entry=3D0xffffffff81b6eb20 <thread0_st>, flags=3Dflags@entry=3D259) at /usr/src/sys/kern/sched_ule.c:2290 #1 0xffffffff80b4adeb in mi_switch (flags=3Dflags@entry=3D259) at /usr/src/sys/kern/kern_synch.c:548 #2 0xffffffff80b9b320 in sleepq_switch ( wchan=3Dwchan@entry=3D0xffffffff81b6e5b8 <proc0>, pri=3Dpri@entry=3D52) at /usr/src/sys/kern/subr_sleepqueue.c:607 #3 0xffffffff80b9b91f in sleepq_timedwait ( wchan=3Dwchan@entry=3D0xffffffff81b6e5b8 <proc0>, pri=3D52) at /usr/src/sys/kern/subr_sleepqueue.c:689 #4 0xffffffff80b4a548 in _sleep (ident=3D0xffffffff81b6e5b8 <proc0>, lock=3Dlock@entry=3D0x0, priority=3Dpriority@entry=3D52, wmesg=3D<optimized out>, sbt=3D42949670000, pr=3Dpr@entry=3D0, flags=3D= 256) at /usr/src/sys/kern/kern_synch.c:219 #5 0xffffffff80ee3779 in swapper () at /usr/src/sys/vm/vm_swapout.c:753 #6 0xffffffff8037d023 in btext () at /usr/src/sys/amd64/amd64/locore.S:88 Let me know if I can help debug it somehow. P.S. Intel Core i3-12100F; 64 Gb RAM. --=20 You are receiving this mail because: You are the assignee for the bug.=
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