€ [ 58.3754770] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/process_machdep.c:159:2, member access within misaligned address 0xffffca80b3af48c8 for type 'struct fpreg' which requires 16 byte alignment [ 58.3951521] cpu1: Begin traceback... [ 58.4251958] vpanic() at netbsd:vpanic+0x2aa [ 58.4852625] isAlreadyReported() at netbsd:isAlreadyReported [ 58.5353201] HandleTypeMismatch.part.1() at netbsd:HandleTypeMismatch.part.1+0xcc [ 58.5953950] HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x7b sys/../common/lib/libc/misc/ubsan.c:408 [ 58.6554676] process_read_fpregs() at netbsd:process_read_fpregs+0x3d sys/arch/amd64/amd64/process_machdep.c:159 [ 58.7155434] proc_regio() at netbsd:proc_regio+0x164 sys/kern/sys_ptrace_common.c:1478 [ 58.7756177] process_dofpregs() at netbsd:process_dofpregs+0xa7 sys/kern/sys_ptrace_common.c:1566 [ 58.8256808] do_ptrace() at netbsd:do_ptrace+0x12d6 ptrace_regs sys/kern/sys_ptrace_common.c:897 [inline] [ 58.8256808] do_ptrace() at netbsd:do_ptrace+0x12d6 sys/kern/sys_ptrace_common.c:1429 [ 58.8757438] sys_ptrace() at netbsd:sys_ptrace+0x4f sys/kern/sys_ptrace.c:218 [ 58.9358216] sys___syscall() at netbsd:sys___syscall+0x1c8 sy_call sys/sys/syscallvar.h:65 [inline] [ 58.9358216] sys___syscall() at netbsd:sys___syscall+0x1c8 sys/kern/sys_syscall.c:77 [ 58.9958957] syscall() at netbsd:syscall+0x29a sy_call sys/sys/syscallvar.h:65 [inline] [ 58.9958957] syscall() at netbsd:syscall+0x29a sy_invoke sys/sys/syscallvar.h:94 [inline] [ 58.9958957] syscall() at netbsd:syscall+0x29a sys/arch/x86/x86/syscall.c:138 [ 59.0059100] --- syscall (number 198) --- [ 59.0159214] Skipping crash dump on recursive panic [ 59.0159214] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:153:24, member access within misaligned address 0x4 for type 'struct x86_64_frame' which requires 8 byte alignment [ 59.0359411] Faulted in mid-traceback; aborting... [ 59.0459519] fatal breakpoint trap in supervisor mode [ 59.0459519] trap type 1 code 0 rip 0xffffffff8021ddbd cs 0x8 rflags 0x286 cr2 0x200001c0 ilevel 0 rsp 0xffffca80b3af34b0 [ 59.0559644] curlwp 0xffff98b07c99d180 pid 200.3 lowest kstack 0xffffca80b3af12c0 Stopped in pid 200.3 (syz-executor.2) at netbsd:breakpoint+0x5: leave ? breakpoint() at netbsd:breakpoint+0x5 db_panic() at netbsd:db_panic+0x109 sys/ddb/db_panic.c:67 vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336 isAlreadyReported() at netbsd:isAlreadyReported HandleTypeMismatch.part.1() at netbsd:HandleTypeMismatch.part.1+0xcc HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x7b sys/../common/lib/libc/misc/ubsan.c:408 db_nextframe() at netbsd:db_nextframe+0x6f6 sys/arch/amd64/amd64/db_machdep.c:153 db_stack_trace_print() at netbsd:db_stack_trace_print+0x2c4 sys/arch/x86/x86/db_trace.c:277 db_panic() at netbsd:db_panic+0xa3 x86_curcpu sys/arch/amd64/compile/obj/GENERIC_SYZKALLER/./machine/cpu.h:67 [inline] db_panic() at netbsd:db_panic+0xa3 sys/ddb/db_panic.c:57 vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336 isAlreadyReported() at netbsd:isAlreadyReported HandleTypeMismatch.part.1() at netbsd:HandleTypeMismatch.part.1+0xcc HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x7b sys/../common/lib/libc/misc/ubsan.c:408 process_read_fpregs() at netbsd:process_read_fpregs+0x3d sys/arch/amd64/amd64/process_machdep.c:159 proc_regio() at netbsd:proc_regio+0x164 sys/kern/sys_ptrace_common.c:1478 process_dofpregs() at netbsd:process_dofpregs+0xa7 sys/kern/sys_ptrace_common.c:1566 do_ptrace() at netbsd:do_ptrace+0x12d6 ptrace_regs sys/kern/sys_ptrace_common.c:897 [inline] do_ptrace() at netbsd:do_ptrace+0x12d6 sys/kern/sys_ptrace_common.c:1429 sys_ptrace() at netbsd:sys_ptrace+0x4f sys/kern/sys_ptrace.c:218 sys___syscall() at netbsd:sys___syscall+0x1c8 sy_call sys/sys/syscallvar.h:65 [inline] sys___syscall() at netbsd:sys___syscall+0x1c8 sys/kern/sys_syscall.c:77 syscall() at netbsd:syscall+0x29a sy_call sys/sys/syscallvar.h:65 [inline] syscall() at netbsd:syscall+0x29a sy_invoke sys/sys/syscallvar.h:94 [inline] syscall() at netbsd:syscall+0x29a sys/arch/x86/x86/syscall.c:138 --- syscall (number 198) --- [ 59.0659777] Skipping crash dump on recursive panic [ 59.0659777] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/db_machdep.c:154:14, member access within misaligned address 0x4 for type 'struct x86_64_frame' which requires 8 byte alignment [ 59.0659777] Faulted in mid-traceback; aborting... [ 59.0659777] fatal breakpoint trap in supervisor mode [ 59.0659777] trap type 1 code 0 rip 0xffffffff8021ddbd cs 0x8 rflags 0x286 cr2 0x200001c0 ilevel 0x8 rsp 0xffffca80b3af21b0 [ 59.0659777] curlwp 0xffff98b07c99d180 pid 200.3 lowest kstack 0xffffca80b3af12c0 Stopped in pid 200.3 (syz-executor.2) at netbsd:breakpoint+0x5: leave