Date: Thu, 21 Nov 2024 16:06:53 -0700 From: Alan Somers <asomers@freebsd.org> To: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: KMSAN and dtrace Message-ID: <CAOtMX2i46vwjUD5=fJHe_PZM=ucw8HD9jZQfHvjcYqR1XF7p_A@mail.gmail.com>
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Would it be possible to make dtrace with with KMSAN? It would certainly make my life easier. As it is, every time I try to kldload traceall, whether from the command line or in the loader, my VM infinite loops printing alerts like this: MSan: Uninitialized stack memory from isize64+0x2e #0 0xffffffff833d8f10 at __msan_warning+0x140 #1 0xffffffff86ec9c03 at dtrace_disp_opnd+0xd3 #2 0xffffffff86ebe552 at dtrace_disx86+0xc602 #3 0xffffffff86eca98e at dtrace_instr_size+0xee #4 0xffffffff86d5ec27 at fbt_provide_module_function+0x957 #5 0xffffffff83303eff at link_elf_each_function_nameval+0x56f #6 0xffffffff86d56cb3 at fbt_provide_module+0x423 #7 0xffffffff86d56871 at fbt_linker_file_cb+0x41 #8 0xffffffff830d9f5c at linker_file_foreach+0xdc #9 0xffffffff830d63dd at linker_load_module+0x413d #10 0xffffffff830e6116 at linker_load_dependencies+0x1136 #11 0xffffffff853b70b8 at link_elf_load_file+0x65c8 #12 0xffffffff830d542e at linker_load_module+0x318e #13 0xffffffff830e0611 at kern_kldload+0x5d1 #14 0xffffffff830e0d74 at sys_kldload+0x1a4 #15 0xffffffff84fe56f6 at amd64_syscall+0x706 #16 0xffffffff84f0ef4b at fast_syscall_common+0xf8
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