Re: Fatal trap 12: .. cpu_idle_acpi .. callout_process
Date: Wed, 03 Jun 2026 04:20:14 UTC
On Wed, 27 May 2026, Bjoern A. Zeeb wrote: > On Tue, 26 May 2026, Bjoern A. Zeeb wrote: > >> Hi, >> >> I got some LinuxKPI problems sorted and can finally shutdown a system w/o >> a driver panicing but now I see on a recent main (pxe booted in bhyve); >> this seems reproducible and typing reset I get the next panic and the next >> and the next and ... until bhyve stops after scrolling for a few seconds. >> >> Anyone seen this or any ideas? I'll try to build a plain main kernel >> otherwise >> to check that it's not anything else... > > I have already found the next LinuxKPI bug. > > If I just boot a kernel and do a shutdown -r I do not run into it > so unless it rings a bell for someone else as well, please ignore this for > now. It just happened again; no known LinuxKPI bugs in the way this time. So maybe it's real after all... >> Syncing disks, vnodes remaining... 0 done >> All buffers synced. >> Uptime: 46s >> kernel trap 12 with interrupts disabled >> >> >> Fatal trap 12: page fault while in kernel mode >> cpuid = 0; apic id = 00 >> fault virtual address = 0xfffffe00a58a0630 >> fault code = supervisor read data, page not present >> instruction pointer = 0x20:0xffffffff80c0ebe8 >> stack pointer = 0x28:0xfffffe008bc49bb0 >> frame pointer = 0x28:0xfffffe008bc49c20 >> code segment = base 0x0, limit 0xfffff, type 0x1b >> = DPL 0, pres 1, long 1, def32 0, gran 1 >> processor eflags = resume, IOPL = 0 >> current process = 11 (idle: cpu0) >> rdi: 0000000000002f2c rsi: 0000000000008000 rdx: 0000000000002e2d >> rcx: 0000000000002e2c r8: fffffe00a58a0630 r9: 000000007fff2744 >> rax: fffffe000ef4e000 rbx: 0000000000002e2c rbp: fffffe008bc49c20 >> r10: 00000000000003e7 r11: 000000000000044c r12: 0000002f2d000000 >> r13: 0000002f2d000000 r14: 0000002e2dd1597a r15: ffffffff82b28300 >> trap number = 12 >> panic: page fault >> cpuid = 0 >> time = 1779819492 >> KDB: stack backtrace: >> db_trace_self_wrapper() at db_trace_self_wrapper+0x36/frame >> 0xfffffe008bc498e0 >> vpanic() at vpanic+0x149/frame 0xfffffe008bc49a10 >> panic() at panic+0x43/frame 0xfffffe008bc49a70 >> trap_pfault() at trap_pfault+0x449/frame 0xfffffe008bc49ae0 >> calltrap() at calltrap+0x8/frame 0xfffffe008bc49ae0 >> --- trap 0xc, rip = 0xffffffff80c0ebe8, rsp = 0xfffffe008bc49bb0, rbp = >> 0xfffffe008bc49c20 --- >> callout_process() at callout_process+0x138/frame 0xfffffe008bc49c20 >> handleevents() at handleevents+0x19a/frame 0xfffffe008bc49c60 >> timercb() at timercb+0x19e/frame 0xfffffe008bc49cc0 >> lapic_handle_timer() at lapic_handle_timer+0xa4/frame 0xfffffe008bc49cf0 >> Xtimerint() at Xtimerint+0xb1/frame 0xfffffe008bc49cf0 >> --- interrupt, rip = 0xffffffff810b1104, rsp = 0xfffffe008bc49dc0, rbp = >> 0xfffffe008bc49dd0 --- >> cpu_idle_acpi() at cpu_idle_acpi+0x54/frame 0xfffffe008bc49dd0 >> cpu_idle() at cpu_idle+0xa6/frame 0xfffffe008bc49df0 >> sched_ule_idletd() at sched_ule_idletd+0x524/frame 0xfffffe008bc49ef0 >> fork_exit() at fork_exit+0x82/frame 0xfffffe008bc49f30 >> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe008bc49f30 >> --- trap 0, rip = 0, rsp = 0, rbp = 0 --- >> KDB: enter: panic >> [ thread pid 11 tid 100003 ] >> Stopped at kdb_enter+0x33: movq $0,0x15be0c2(%rip) >> db> reset >> panic: mtx_lock_spin: recursed on non-recursive mutex callout @ >> /usr/src/sys/kern/kern_timeout.c:576 >> >> cpuid = 0 >> time = 1779819492 >> KDB: stack backtrace: >> db_trace_self_wrapper() at db_trace_self_wrapper+0x36/frame >> 0xfffffe008bc49160 >> vpanic() at vpanic+0x149/frame 0xfffffe008bc49290 >> panic() at panic+0x43/frame 0xfffffe008bc492f0 >> __mtx_lock_spin_flags() at __mtx_lock_spin_flags+0x11b/frame >> 0xfffffe008bc49330 >> _callout_stop_safe() at _callout_stop_safe+0x106/frame 0xfffffe008bc493a0 >> shutdown_resettodr() at shutdown_resettodr+0x15/frame 0xfffffe008bc493b0 >> kern_reboot() at kern_reboot+0x2a3/frame 0xfffffe008bc493f0 >> db_reset() at db_reset+0x108/frame 0xfffffe008bc49420 >> db_command() at db_command+0x3aa/frame 0xfffffe008bc494e0 >> db_command_loop() at db_command_loop+0x4d/frame 0xfffffe008bc494f0 >> db_trap() at db_trap+0x100/frame 0xfffffe008bc49590 >> kdb_trap() at kdb_trap+0x25f/frame 0xfffffe008bc496e0 >> trap() at trap+0x888/frame 0xfffffe008bc49810 >> calltrap() at calltrap+0x8/frame 0xfffffe008bc49810 >> --- trap 0x3, rip = 0xffffffff80c44f43, rsp = 0xfffffe008bc498e8, rbp = >> 0xfffffe008bc49a10 --- >> kdb_enter() at kdb_enter+0x33/frame 0xfffffe008bc49a10 >> panic() at panic+0x43/frame 0xfffffe008bc49a70 >> trap_pfault() at trap_pfault+0x449/frame 0xfffffe008bc49ae0 >> calltrap() at calltrap+0x8/frame 0xfffffe008bc49ae0 >> --- trap 0xc, rip = 0xffffffff80c0ebe8, rsp = 0xfffffe008bc49bb0, rbp = >> 0xfffffe008bc49c20 --- >> callout_process() at callout_process+0x138/frame 0xfffffe008bc49c20 >> handleevents() at handleevents+0x19a/frame 0xfffffe008bc49c60 >> timercb() at timercb+0x19e/frame 0xfffffe008bc49cc0 >> lapic_handle_timer() at lapic_handle_timer+0xa4/frame 0xfffffe008bc49cf0 >> Xtimerint() at Xtimerint+0xb1/frame 0xfffffe008bc49cf0 >> --- interrupt, rip = 0xffffffff810b1104, rsp = 0xfffffe008bc49dc0, rbp = >> 0xfffffe008bc49dd0 --- >> cpu_idle_acpi() at cpu_idle_acpi+0x54/frame 0xfffffe008bc49dd0 >> cpu_idle() at cpu_idle+0xa6/frame 0xfffffe008bc49df0 >> sched_ule_idletd() at sched_ule_idletd+0x524/frame 0xfffffe008bc49ef0 >> fork_exit() at fork_exit+0x82/frame 0xfffffe008bc49f30 >> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe008bc49f30 >> --- trap 0, rip = 0, rsp = 0, rbp = 0 --- >> panic: mtx_lock_spin: recursed on non-recursive mutex callout @ >> /usr/src/sys/kern/kern_timeout.c:576 >> >> cpuid = 0 >> time = 1779819492 >> .. >> .. >> .. >> >> >> > > -- Bjoern A. Zeeb r15:7