[ 124.3072986] panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/arch/amd64/amd64/process_machdep.c:159:2, member access within misaligned address 0xffff9b80b3ab88c8 for type 'struct fpreg' which requires 16 byte alignment [ 124.3349640] cpu0: Begin traceback... [ 124.3517757] vpanic() at netbsd:vpanic+0x2aa sys/kern/subr_prf.c:336 [ 124.4185022] isAlreadyReported() at netbsd:isAlreadyReported [ 124.4741078] HandleTypeMismatch.part.1() at netbsd:HandleTypeMismatch.part.1+0xcc [ 124.5297183] HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x7b sys/../common/lib/libc/misc/ubsan.c:408 [ 124.5964422] process_read_fpregs() at netbsd:process_read_fpregs+0x3d sys/arch/amd64/amd64/process_machdep.c:159 [ 124.6520505] proc_regio() at netbsd:proc_regio+0x164 sys/kern/sys_ptrace_common.c:1478 [ 124.7187743] process_dofpregs() at netbsd:process_dofpregs+0xa7 sys/kern/sys_ptrace_common.c:1566 [ 124.7743806] do_ptrace() at netbsd:do_ptrace+0x12d6 ptrace_regs sys/kern/sys_ptrace_common.c:897 [inline] [ 124.7743806] do_ptrace() at netbsd:do_ptrace+0x12d6 sys/kern/sys_ptrace_common.c:1429 [ 124.8299858] sys_ptrace() at netbsd:sys_ptrace+0x4f sys/kern/sys_ptrace.c:218 [ 124.8855964] sys___syscall() at netbsd:sys___syscall+0x1c8 sy_call sys/sys/syscallvar.h:65 [inline] [ 124.8855964] sys___syscall() at netbsd:sys___syscall+0x1c8 sys/kern/sys_syscall.c:77 15:56:02 executing program 5: mmap(&(0x7f0000000000/0x3000)=nil, 0x3000, 0x2, 0x3c90, 0xffffffffffffffff, 0x0, 0x0) madvise(&(0x7f0000003000/0x4000)=nil, 0x4000, 0x0) r0 = socket(0x0, 0x0, 0x0) r1 = open$dir(&(0x7f0000000100)='./file0\x00', 0x40000400000002c2, 0x0) writev(r1, &(0x7f0000000340)=[{&(0x7f0000000180), 0x81700}], 0x1000000000000013) writev(0xffffffffffffffff, &(0x7f0000000140), 0x0) open$dir(&(0x7f0000000100)='./file0\x00', 0x40000400000002c2, 0x0) socketpair(0x18, 0x2, 0xff, &(0x7f0000000300)={0xffffffffffffffff}) writev(r2, &(0x7f0000001640)=[{&(0x7f0000000040)="e02906d8628e78115e4d566e918a25552a2365967a7f9af89eb01dacabd6f64a8cb1706c0522e3465518fe3b876cf4ae6a311f46fe8eaa2c478238ee3a2ae9a1828f86622bee3860e0a59a4e5c56ce6d667314918cf063ea97b7fcec9cfd585e", 0x60}, {&(0x7f00000000c0)="40b5eb7fea2bd22ea53f69da7943374fbbcb25831b2508ce14b7d78cd403549dc90c6225e54dbf23aca01966898880b6300a996df1a6e125a24fc6b3f38bda91", 0xfffffffffffffe1b}, {&(0x7f0000001700)="c8c89713b4c648232d87f8779611fe9eeaa8d9ccb09de8cee5e7af1f27fc9666ebff049c368f383f0581fc41aef275b09c396cf4fe1acc741a52cefb1c02c2b93f32f1e0e2d0c700", 0x3c}, {&(0x7f00000002c0)="04d4e183be14e42d4f46c251a1d2f7db06c652c63ff0f2f6170893694de383e07f230d234e6c", 0x1a}, {&(0x7f00000001c0)="498d464266e92fa3fd5b61603f4b86364cebf6ed3a4d127b1d4bdd1298420b97fb08aa68df71b9231b1e502740c02a627de2d4fa048599ed62028dbc86ec91bb7ee2c16f7d23467f956fe7f21b13b2081b35f56442fcd4cc4774e572e821bdddb34a4ba30d5d8510398302ecefc663a9a5dd36d9682533c77cc1b029aa3ba62ca9d585c124a7d4f85619c687dda37dc5c628ffec5da0994e13cee167821800e926fac280729df77fa82396896d14a3f6", 0xb0}, {&(0x7f0000000380)="350a6ffbb81eac552680075a1d5b1fc223e22df3c6d668dda698cf81b8966438400c619a025bedb2e592366d5581525bdd9e73441e84d5d34b20efeb319ed1644f85c4a7cbb59e3532f7062b8c0157a1313bfb2c4afa6f246871a27be6546491a0d80aac5de9229ee62dc2366ba0912f751182f6cdc34e313344086bde07fc507ca88940f0756e2591d0f502755e18885fb8f1c3f5f82237ace1a2ba0a958bc3c6e1b0a93f3747e9e552fc3cb8e17ec46e75a0492a3bd9fe0ac7124422742dc9e59cab0da3bce5", 0x4a6}, {&(0x7f0000000280)="7c78d315ab00191fbd3d3102032da5d8146dc572a8632fee6b290de69043af285f320428f117374d3d46339d7024afd5e98c147bb2eb", 0x36}, {&(0x7f0000000480)="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", 0x1000}, {&(0x7f0000001480)="531d1ca7d0e445eeaca80af993c16ae77a7c61e61a2783d1bf8c0e6ae350e9c338674e5cd52892cd494d711152ea514682e9a807de41a17773f596b095f74e80066e9a23822b3da31b89c0b3317d4eab8a11c506c64e1f04464048cf6cc6d9f25eb1de3c2518a6727e3c003068d8a89fdf88dc37b61717d4f4d1729549edf6a9beca5492398939094da68b8791afa250a376eb89d1f8df5700dff7c08a4762fe39b92cc17502293967db3b509ad3213ab4851bb6abacd838bdd76ef5bd047cd308334b28a7cadd6a91438202b3fe3927ba2b5a822ab05a7b353c45dd6f7273e8cc", 0xfffffffffffffeda}, {&(0x7f0000001580)="5af72a728e529557ab9413eaaaf5854c8d40e340e3faec17b362dd2285cbe7e4df2288e3b60c87d0e57dba5ad74730e32420f9c7ddc0a8c77039d12d19f28a9f75729c2a52e98a4701f4b64186ddd04e8757d5f2a831ab11416b56969d65197a6c4df6cc4a791f66d303727c529fe831d53a35bcc87f25a5b1f37350fc869a7a4dc663dad583aa2a5aa9", 0x8a}], 0xa) open$dir(&(0x7f0000000100)='./file0\x00', 0x0, 0x0) getuid() chown(0x0, 0x0, 0x0) chown(0x0, 0x0, 0x0) open(0x0, 0x0, 0x0) open(&(0x7f0000000000)='./file0\x00', 0x12040a0, 0x180) r3 = socket(0x1f, 0x3, 0x0) dup2(r3, r3) r4 = fcntl$dupfd(r0, 0xc, r3) r5 = socket(0x1f, 0x3, 0x0) dup2(r5, r5) sendto$unix(r5, &(0x7f0000001780)="cc77454b3b4123e700507e45335627abc374093e60957855ce4c21c14e927e46b08613d39d5275864226dfc544ddb011f30c09630ea3fbc33f69b64c72945bd540cd55c5f1717a8aae953259b4781cfead2a766553e9ae8154d6d4359d140eddcbf0990f0fcbf8f8e44560f7cf296adaa13b7f0cff35c4c0e890213cdafa8349b42750bec06bde36aca27151325ee882878e0b1d3a41b003a3a67a1db553dec538d4e7e931292c8c91b8355f492bb38d959780689e58ae65725e91c889e158291e641d5124a0767f667e7db791acc4758ef364", 0xd3, 0x4, &(0x7f0000000140)=@file={0x3, './file0\x00'}, 0xa) r6 = shmget(0x3, 0x1000, 0x7081971a9f083867, &(0x7f0000ffd000/0x1000)=nil) shmat(r6, &(0x7f0000000000/0x4000)=nil, 0x3b07800d37080af) close(r4) connect$unix(r0, 0x0, 0x0) shutdown(0xffffffffffffffff, 0x0) mmap(&(0x7f0000002000/0x4000)=nil, 0x4000, 0x2, 0x810, 0xffffffffffffffff, 0x0, 0x0) [ 124.9412004] syscall() at netbsd:syscall+0x29a sy_call sys/sys/syscallvar.h:65 [inline] [ 124.9412004] syscall() at netbsd:syscall+0x29a sy_invoke sys/sys/syscallvar.h:94 [inline] [ 124.9412004] syscall() at netbsd:syscall+0x29a sys/arch/x86/x86/syscall.c:138 [ 124.9634436] --- syscall (number 198) --- [ 124.9634436] Skipping crash dump on recursive panic [ 124.9784278] 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 [ 125.0017526] Faulted in mid-traceback; aborting... [ 125.0017526] fatal breakpoint trap in supervisor mode [ 125.0107064] trap type 1 code 0 rip 0xffffffff8021ddbd cs 0x8 rflags 0x286 cr2 0x20000380 ilevel 0 rsp 0xffff9b80b3ab74b0 [ 125.0247841] curlwp 0xffff963aa2ad0ae0 pid 1117.3 lowest kstack 0xffff9b80b3ab52c0 Stopped in pid 1117.3 (syz-executor.3) 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) --- [ 125.0330696] Skipping crash dump on recursive panic [ 125.0330696] 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 [ 125.0330696] Faulted in mid-traceback; aborting... [ 125.0330696] fatal breakpoint trap in supervisor mode [ 125.0330696] trap type 1 code 0 rip 0xffffffff8021ddbd cs 0x8 rflags 0x286 cr2 0x20000380 ilevel 0x8 rsp 0xffff9b80b3ab61b0 [ 125.0330696] curlwp 0xffff963aa2ad0ae0 pid 1117.3 lowest kstack 0xffff9b80b3ab52c0 Stopped in pid 1117.3 (syz-executor.3) at netbsd:breakpoint+0x5: leave