./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1657250675
<...>
Warning: Permanently added '10.128.0.191' (ED25519) to the list of known hosts.
execve("./syz-executor1657250675", ["./syz-executor1657250675"], 0x7ffed1628be0 /* 10 vars */) = 0
brk(NULL) = 0x55556cc71000
brk(0x55556cc71d00) = 0x55556cc71d00
arch_prctl(ARCH_SET_FS, 0x55556cc71380) = 0
set_tid_address(0x55556cc71650) = 5057
set_robust_list(0x55556cc71660, 24) = 0
rseq(0x55556cc71ca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor1657250675", 4096) = 28
getrandom("\x26\xad\xec\x63\x39\x01\x44\x2f", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x55556cc71d00
brk(0x55556cc92d00) = 0x55556cc92d00
brk(0x55556cc93000) = 0x55556cc93000
mprotect(0x7f0624f70000, 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) = 0x7f061ca00000
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"..., 1048576) = 1048576
munmap(0x7f061ca00000, 138412032) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
ioctl(4, LOOP_SET_FD, 3) = 0
close(3) = 0
close(4) = 0
mkdir("./file0", 0777) = 0
syzkaller login: [ 60.275169][ T5057] loop0: detected capacity change from 0 to 2048
mount("/dev/loop0", "./file0", "nilfs2", MS_NOATIME|MS_NODIRATIME|MS_RELATIME|MS_LAZYTIME, "") = 0
openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
chdir("./file0") = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
openat(AT_FDCWD, ".", O_RDONLY) = 4
[ 60.322805][ T5059] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[ 60.359012][ T5057] ------------[ cut here ]------------
[ 60.364566][ T5057] UBSAN: array-index-out-of-bounds in fs/nilfs2/dir.c:257:18
[ 60.372027][ T5057] index 15 is out of range for type 'unsigned char[15]'
[ 60.379312][ T5057] CPU: 0 PID: 5057 Comm: syz-executor165 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
[ 60.389369][ T5057] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
[ 60.399418][ T5057] Call Trace:
[ 60.402684][ T5057]
[ 60.405608][ T5057] dump_stack_lvl+0x241/0x360
[ 60.410293][ T5057] ? __pfx_dump_stack_lvl+0x10/0x10
[ 60.415520][ T5057] ? __pfx__printk+0x10/0x10
[ 60.420123][ T5057] __ubsan_handle_out_of_bounds+0x121/0x150
[ 60.426020][ T5057] nilfs_add_link+0xb39/0xb80
[ 60.430702][ T5057] ? __pfx_nilfs_add_link+0x10/0x10
[ 60.435891][ T5057] ? rcu_is_watching+0x15/0xb0
[ 60.440642][ T5057] ? __mark_inode_dirty+0x805/0xdb0
[ 60.445833][ T5057] nilfs_link+0x136/0x220
[ 60.450161][ T5057] ? __pfx_nilfs_link+0x10/0x10
[ 60.455012][ T5057] vfs_link+0x4f5/0x690
[ 60.459168][ T5057] do_linkat+0x356/0x760
[ 60.463407][ T5057] ? __pfx_do_linkat+0x10/0x10
[ 60.468188][ T5057] ? getname_flags+0x1fe/0x4f0
[ 60.472965][ T5057] __x64_sys_linkat+0xdd/0xf0
[ 60.477634][ T5057] do_syscall_64+0xfb/0x240
[ 60.482130][ T5057] entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 60.488026][ T5057] RIP: 0033:0x7f0624efc679
[ 60.492429][ T5057] 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
[ 60.512113][ T5057] RSP: 002b:00007fff6dc40a98 EFLAGS: 00000246 ORIG_RAX: 0000000000000109
[ 60.520523][ T5057] RAX: ffffffffffffffda RBX: 00007fff6dc40c68 RCX: 00007f0624efc679
[ 60.528579][ T5057] RDX: 0000000000000004 RSI: 0000000020000180 RDI: 0000000000000004
[ 60.536552][ T5057] RBP: 00007f0624f70610 R08: 0000000000000000 R09: 00007fff6dc40c68
[ 60.544523][ T5057] R10: 0000000020000640 R11: 0000000000000246 R12: 0000000000000001
[ 60.552493][ T5057] R13: 00007fff6dc40c58 R14: 0000000000000001 R15: 0000000000000001
[ 60.560477][ T5057]
[ 60.564063][ T5057] ---[ end trace ]---
[ 60.568119][ T5057] Kernel panic - not syncing: UBSAN: panic_on_warn set ...
[ 60.575314][ T5057] CPU: 0 PID: 5057 Comm: syz-executor165 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
[ 60.585376][ T5057] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
[ 60.595425][ T5057] Call Trace:
[ 60.598698][ T5057]
[ 60.601625][ T5057] dump_stack_lvl+0x241/0x360
[ 60.606303][ T5057] ? __pfx_dump_stack_lvl+0x10/0x10
[ 60.611503][ T5057] ? __pfx__printk+0x10/0x10
[ 60.616088][ T5057] ? vprintk_emit+0x631/0x770
[ 60.620771][ T5057] ? vscnprintf+0x5d/0x90
[ 60.625097][ T5057] panic+0x349/0x860
[ 60.628992][ T5057] ? check_panic_on_warn+0x21/0xb0
[ 60.634102][ T5057] ? __pfx_panic+0x10/0x10
[ 60.638516][ T5057] ? _printk+0xd5/0x120
[ 60.642707][ T5057] ? __pfx__printk+0x10/0x10
[ 60.647322][ T5057] check_panic_on_warn+0x86/0xb0
[ 60.652287][ T5057] __ubsan_handle_out_of_bounds+0x141/0x150
[ 60.658192][ T5057] nilfs_add_link+0xb39/0xb80
[ 60.662905][ T5057] ? __pfx_nilfs_add_link+0x10/0x10
[ 60.668127][ T5057] ? rcu_is_watching+0x15/0xb0
[ 60.672892][ T5057] ? __mark_inode_dirty+0x805/0xdb0
[ 60.678091][ T5057] nilfs_link+0x136/0x220
[ 60.682424][ T5057] ? __pfx_nilfs_link+0x10/0x10
[ 60.687282][ T5057] vfs_link+0x4f5/0x690
[ 60.691440][ T5057] do_linkat+0x356/0x760
[ 60.695682][ T5057] ? __pfx_do_linkat+0x10/0x10
[ 60.700445][ T5057] ? getname_flags+0x1fe/0x4f0
[ 60.705215][ T5057] __x64_sys_linkat+0xdd/0xf0
[ 60.709892][ T5057] do_syscall_64+0xfb/0x240
[ 60.714391][ T5057] entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 60.720315][ T5057] RIP: 0033:0x7f0624efc679
[ 60.724738][ T5057] 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
[ 60.744339][ T5057] RSP: 002b:00007fff6dc40a98 EFLAGS: 00000246 ORIG_RAX: 0000000000000109
[ 60.752752][ T5057] RAX: ffffffffffffffda RBX: 00007fff6dc40c68 RCX: 00007f0624efc679
[ 60.760721][ T5057] RDX: 0000000000000004 RSI: 0000000020000180 RDI: 0000000000000004
[ 60.768687][ T5057] RBP: 00007f0624f70610 R08: 0000000000000000 R09: 00007fff6dc40c68
[ 60.776656][ T5057] R10: 0000000020000640 R11: 0000000000000246 R12: 0000000000000001
[ 60.784624][ T5057] R13: 00007fff6dc40c58 R14: 0000000000000001 R15: 0000000000000001
[ 60.792606][ T5057]
[ 60.795808][ T5057] Kernel Offset: disabled
[ 60.800181][ T5057] Rebooting in 86400 seconds..