./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3240292347 <...> Warning: Permanently added '10.128.1.40' (ED25519) to the list of known hosts. execve("./syz-executor3240292347", ["./syz-executor3240292347"], 0x7ffc21cc3f90 /* 10 vars */) = 0 brk(NULL) = 0x555556e72000 brk(0x555556e72d00) = 0x555556e72d00 arch_prctl(ARCH_SET_FS, 0x555556e72380) = 0 set_tid_address(0x555556e72650) = 5032 set_robust_list(0x555556e72660, 24) = 0 rseq(0x555556e72ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3240292347", 4096) = 28 getrandom("\x32\xf8\x55\xea\xb1\x27\x74\x66", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556e72d00 brk(0x555556e93d00) = 0x555556e93d00 brk(0x555556e94000) = 0x555556e94000 mprotect(0x7f43395e7000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f4331136000 write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 munmap(0x7f4331136000, 524288) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 mkdir("./file0", 0777) = 0 mount("/dev/loop0", "./file0", "hfsplus", MS_POSIXACL, "\x6e\x6f\x62\x61\x72\x72\x69\x65\x72\x2c\x62\x61\x72\x72\x69\x65\x72\x2c\x63\x72\x65\x61\x74\x6f\x72\x3d\x19\x75\x1d\xfd\x2c\x75\x6d\x61\x73\x6b\x3d\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x32\x36\x36\x30\x2c\x66\x6f\x72\x63\x65\x2c\x62\x61\x72\x72\x69\x65\x72\x2c\x6e\x6c\x73\x3d\x64\x65\x66\x61\x75\x6c\x74\x2c") = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 chdir("./file0") = 0 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 openat(AT_FDCWD, "/dev/char/4:1", O_RDWR) = 4 openat(AT_FDCWD, "/proc/self/mountinfo", O_RDWR) = 5 [ 77.374978][ T5032] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5032 'syz-executor324' [ 77.397171][ T5032] loop0: detected capacity change from 0 to 1024 [ 77.429547][ T5032] detected buffer overflow in strnlen [ 77.436337][ T5032] ------------[ cut here ]------------ [ 77.442168][ T5032] kernel BUG at lib/string_helpers.c:1031! [ 77.448585][ T5032] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 77.454705][ T5032] CPU: 0 PID: 5032 Comm: syz-executor324 Not tainted 6.5.0-rc2-next-20230718-syzkaller #0 [ 77.464895][ T5032] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 [ 77.475000][ T5032] RIP: 0010:fortify_panic+0x1c/0x20 [ 77.480313][ T5032] Code: ba fd eb d7 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 53 48 89 fb e8 23 de 65 fd 48 89 de 48 c7 c7 00 2c c8 8a e8 e4 28 49 fd <0f> 0b 66 90 f3 0f 1e fa 41 55 41 54 55 53 48 89 fb e8 fe dd 65 fd [ 77.499946][ T5032] RSP: 0018:ffffc90003a1f7b8 EFLAGS: 00010282 [ 77.506031][ T5032] RAX: 0000000000000023 RBX: ffffffff8a873580 RCX: 0000000000000000 [ 77.514123][ T5032] RDX: 0000000000000000 RSI: ffffffff816aad20 RDI: 0000000000000005 [ 77.522101][ T5032] RBP: ffff888019f16cb8 R08: 0000000000000005 R09: 0000000000000000 [ 77.530076][ T5032] R10: 0000000080000000 R11: 0000000000000001 R12: 1ffff92000743efa [ 77.539735][ T5032] R13: 0000000000000004 R14: ffff888078fa69c0 R15: ffffc90003a1f7f0 [ 77.548241][ T5032] FS: 0000555556e72380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 77.557274][ T5032] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.563879][ T5032] CR2: 0000000000456b30 CR3: 0000000079883000 CR4: 00000000003506f0 [ 77.571972][ T5032] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.581034][ T5032] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.589126][ T5032] Call Trace: [ 77.592506][ T5032] [ 77.595446][ T5032] ? die+0x31/0x80 [ 77.599206][ T5032] ? do_trap+0x1ab/0x3b0 [ 77.603489][ T5032] ? fortify_panic+0x1c/0x20 [ 77.608224][ T5032] ? do_error_trap+0x9e/0x160 [ 77.612948][ T5032] ? fortify_panic+0x1c/0x20 [ 77.617681][ T5032] ? handle_invalid_op+0x2c/0x30 [ 77.622653][ T5032] ? fortify_panic+0x1c/0x20 [ 77.627288][ T5032] ? exc_invalid_op+0x2d/0x40 [ 77.632011][ T5032] ? asm_exc_invalid_op+0x1a/0x20 [ 77.637095][ T5032] ? vprintk+0x90/0xa0 [ 77.641190][ T5032] ? fortify_panic+0x1c/0x20 [ 77.645833][ T5032] ? fortify_panic+0x1c/0x20 [ 77.650439][ T5032] hfsplus_show_options+0x658/0x740 [ 77.655664][ T5032] ? string_escape_mem+0x6c2/0xdb0 [ 77.660796][ T5032] ? hfsplus_parse_options+0x9c0/0x9c0 [ 77.666284][ T5032] ? seq_puts+0xdb/0x150 [ 77.670554][ T5032] ? hfsplus_parse_options+0x9c0/0x9c0 [ 77.676029][ T5032] show_mountinfo+0x671/0x990 [ 77.680723][ T5032] ? show_type+0x130/0x130 [ 77.685152][ T5032] ? do_raw_spin_unlock+0x173/0x230 [ 77.690370][ T5032] ? _raw_spin_unlock+0x28/0x40 [ 77.695253][ T5032] seq_read_iter+0xaf0/0x1280 [ 77.699975][ T5032] copy_splice_read+0x418/0x8f0 [ 77.705131][ T5032] ? warn_unsupported+0xc0/0xc0 [ 77.710022][ T5032] ? security_file_permission+0xdc/0x100 [ 77.715696][ T5032] ? warn_unsupported+0xc0/0xc0 [ 77.720624][ T5032] vfs_splice_read+0x2c8/0x3b0 [ 77.725418][ T5032] splice_direct_to_actor+0x2a5/0xa30 [ 77.730820][ T5032] ? folio_flags.constprop.0+0x150/0x150 [ 77.736607][ T5032] ? vfs_splice_read+0x3b0/0x3b0 [ 77.741581][ T5032] ? bpf_lsm_file_permission+0x9/0x10 [ 77.746971][ T5032] ? security_file_permission+0x94/0x100 [ 77.752636][ T5032] do_splice_direct+0x1af/0x280 [ 77.757513][ T5032] ? splice_direct_to_actor+0xa30/0xa30 [ 77.763085][ T5032] ? propagate_umount+0x1af0/0x1af0 [ 77.768306][ T5032] ? bpf_lsm_file_permission+0x9/0x10 [ 77.773706][ T5032] ? security_file_permission+0x94/0x100 [ 77.779355][ T5032] do_sendfile+0xb88/0x1390 [ 77.783902][ T5032] ? vfs_iocb_iter_write+0x4c0/0x4c0 [ 77.789342][ T5032] ? ptrace_notify+0xf4/0x130 [ 77.794046][ T5032] ? reacquire_held_locks+0x4b0/0x4b0 [ 77.799532][ T5032] __x64_sys_sendfile64+0x1d6/0x220 [ 77.804834][ T5032] ? __ia32_sys_sendfile+0x220/0x220 [ 77.810144][ T5032] ? lockdep_hardirqs_on+0x7d/0x100 [ 77.815388][ T5032] ? _raw_spin_unlock_irq+0x2e/0x50 [ 77.820611][ T5032] ? ptrace_notify+0xf4/0x130 [ 77.825340][ T5032] do_syscall_64+0x38/0xb0 [ 77.829785][ T5032] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 77.835704][ T5032] RIP: 0033:0x7f4339573a79 [ 77.840125][ T5032] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 77.859768][ T5032] RSP: 002b:00007ffff9271428 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 77.868198][ T5032] RAX: ffffffffffffffda RBX: 00007ffff9271430 RCX: 00007f4339573a79 [ 77.876438][ T5032] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 [ 77.884417][ T5032] RBP: 00007f43395e7610 R08: 0000000000000000 R09: 65732f636f72702f [ 77.892395][ T5032] R10: 0800000080004105 R11: 0000000000000246 R12: 0000000000000001 [ 77.900371][ T5032] R13: 00007ffff9271668 R14: 0000000000000001 R15: 0000000000000001 [ 77.908532][ T5032] [ 77.911558][ T5032] Modules linked in: [ 77.915932][ T5032] ---[ end trace 0000000000000000 ]--- [ 77.921429][ T5032] RIP: 0010:fortify_panic+0x1c/0x20 [ 77.926752][ T5032] Code: ba fd eb d7 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 53 48 89 fb e8 23 de 65 fd 48 89 de 48 c7 c7 00 2c c8 8a e8 e4 28 49 fd <0f> 0b 66 90 f3 0f 1e fa 41 55 41 54 55 53 48 89 fb e8 fe dd 65 fd [ 77.946431][ T5032] RSP: 0018:ffffc90003a1f7b8 EFLAGS: 00010282 [ 77.952554][ T5032] RAX: 0000000000000023 RBX: ffffffff8a873580 RCX: 0000000000000000 [ 77.960570][ T5032] RDX: 0000000000000000 RSI: ffffffff816aad20 RDI: 0000000000000005 [ 77.968604][ T5032] RBP: ffff888019f16cb8 R08: 0000000000000005 R09: 0000000000000000 [ 77.976637][ T5032] R10: 0000000080000000 R11: 0000000000000001 R12: 1ffff92000743efa [ 77.984693][ T5032] R13: 0000000000000004 R14: ffff888078fa69c0 R15: ffffc90003a1f7f0 [ 77.992761][ T5032] FS: 0000555556e72380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 78.001838][ T5032] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.008450][ T5032] CR2: 0000000000456b30 CR3: 0000000079883000 CR4: 00000000003506f0 [ 78.016472][ T5032] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.024530][ T5032] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.032591][ T5032] Kernel panic - not syncing: Fatal exception [ 78.038984][ T5032] Kernel Offset: disabled [ 78.043325][ T5032] Rebooting in 86400 seconds..