To reproduce: https://download.freebsd.org/snapshots/VM-IMAGES/15.0-CURRENT/amd64/20240606/FreeBSD-15.0-CURRENT-amd64-zfs-20240606-9c5d7e4a0c02-270625.qcow2.xz echo linux_enable=YES >> /etc/rc.conf service linux start --- Fatal trap 12: page fault while in kernel mode cpuid = 0; apic id = 00 fault virtual address = 0xffffffff830808bf fault code = supervisor write data, protection violation instruction pointer = 0x20:0xffffffff83077701 stack pointer = 0x28:0xfffffe0104bcba00 frame pointer = 0x28:0xfffffe0104bcba40 code segment = base rx0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 116 (kldload) rdi: ffffffff830808b8 rsi: 00000000000000c0 rdx: 0000000000000100 rcx: ffffffff83081950 r8: ffffffff83081978 r9: 0000000000000000 rax: 00000000000001d0 rbx: fffff8001354c480 rbp: fffffe0104bcba40 r10: 0000000000010000 r11: 0000000000000001 r12: ffffffff83080b90 r13: fffff800135711e0 r14: fffff800032df480 r15: ffffffff830886d0 trap number = 12 panic: page fault cpuid = 0 time = 1718042175 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0104bcb6d0 vpanic() at vpanic+0x13f/frame 0xfffffe0104bcb800 panic() at panic+0x43/frame 0xfffffe0104bcb860 trap_fatal() at trap_fatal+0x40b/frame 0xfffffe0104bcb8c0 trap_pfault() at trap_pfault+0xa0/frame 0xfffffe0104bcb930 calltrap() at calltrap+0x8/frame 0xfffffe0104bcb930 --- trap 0xc, rip = 0xffffffff83077701, rsp = 0xfffffe0104bcba00, rbp = 0xfffffe0104bcba40 --- elf64_linux_vdso_fixup() at elf64_linux_vdso_fixup+0xf1/frame 0xfffffe0104bcba40 linux_vdso_install() at linux_vdso_install+0x5f/frame 0xfffffe0104bcba80 linker_load_module() at linker_load_module+0xc23/frame 0xfffffe0104bcbd80 kern_kldload() at kern_kldload+0x16e/frame 0xfffffe0104bcbdd0 sys_kldload() at sys_kldload+0x5c/frame 0xfffffe0104bcbe00 amd64_syscall() at amd64_syscall+0x158/frame 0xfffffe0104bcbf30 fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0104bcbf30 --- syscall (304, FreeBSD ELF64, kldload), rip = 0x17c6d1d37da, rsp = 0x17c6bca0038, rbp = 0x17c6bca05b0 --- KDB: enter: panic
I have experienced the same error on 15.0-CURRENT VM-Image using the vmdk with VirtualBox.
Perhaps related? linux: Allows writing to the vdso from the kernel https://github.com/freebsd/freebsd-src/commit/ec69d230933f82c7c142b053882255aa57475463 /* * VDSO is readonly mapped to the process VA and * can't be relocated by rtld. */ https://github.com/freebsd/freebsd-src/blob/main/sys/compat/linux/linux_vdso.c#L138
Btw, I recompiled world & kernel and have qemu_guest_agent_enable=YES and it doesn't crash.