./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor246890679
<...>
Warning: Permanently added '10.128.1.19' (ED25519) to the list of known hosts.
execve("./syz-executor246890679", ["./syz-executor246890679"], 0x7ffd16696cb0 /* 10 vars */) = 0
brk(NULL) = 0x555591349000
brk(0x555591349d00) = 0x555591349d00
arch_prctl(ARCH_SET_FS, 0x555591349380) = 0
set_tid_address(0x555591349650) = 5824
set_robust_list(0x555591349660, 24) = 0
rseq(0x555591349ca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor246890679", 4096) = 27
getrandom("\x60\x23\x2c\xc7\x95\x99\x02\x51", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x555591349d00
brk(0x55559136ad00) = 0x55559136ad00
brk(0x55559136b000) = 0x55559136b000
mprotect(0x7f9d5945a000, 16384, PROT_READ) = 0
mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000
mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000
mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5826 attached
, child_tidptr=0x555591349650) = 5826
[pid 5826] set_robust_list(0x555591349660, 24) = 0
[pid 5826] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5826] setpgid(0, 0) = 0
[pid 5826] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5826] write(3, "1000", 4) = 4
[pid 5826] close(3) = 0
executing program
[pid 5826] write(1, "executing program\n", 18) = 18
[pid 5826] memfd_create("syzkaller", 0) = 3
[pid 5826] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9d50e00000
[pid 5826] 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"..., 16777216) = 16777216
[pid 5826] munmap(0x7f9d50e00000, 138412032) = 0
[pid 5826] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5826] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5826] close(3) = 0
[pid 5826] close(4) = 0
[pid 5826] mkdir("./file0", 0777) = 0
[pid 5826] mount("/dev/loop0", "./file0", "jfs", 0, "iocharset=maccroatian,discard=0x0000000000000003,nodiscard,errors=continue,iocharset=maccyrillic,") = 0
[pid 5826] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5826] chdir("./file0") = 0
[pid 5826] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5826] chdir("./file0") = 0
[ 89.146583][ T5826] loop0: detected capacity change from 0 to 32768
[ 89.185747][ T5826]
[ 89.185747][ T5826] ... Log Wrap ... Log Wrap ... Log Wrap ...
[ 89.185747][ T5826]
[pid 5826] openat(AT_FDCWD, "./file2", O_RDONLY|O_CREAT|O_NOCTTY|O_NONBLOCK|__O_SYNC|O_DIRECT|O_NOFOLLOW|O_NOATIME|FASYNC, 0402) = -1 EIO (Input/output error)
[pid 5826] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT|O_SYNC|O_NOATIME, 000) = -1 EIO (Input/output error)
[ 89.215536][ T5826] read_mapping_page failed!
[ 89.220223][ T5826] ERROR: (device loop0): txCommit:
[ 89.220223][ T5826]
[ 89.238944][ T5826] read_mapping_page failed!
[ 89.243745][ T5826] ERROR: (device loop0): txCommit:
[ 89.243745][ T5826]
[ 89.255603][ T5826] ------------[ cut here ]------------
[ 89.261207][ T5826] UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:3688:8
[ 89.268844][ T5826] index -1 is out of range for type 'struct dtslot[128]'
[ 89.275947][ T5826] CPU: 0 UID: 0 PID: 5826 Comm: syz-executor246 Not tainted 6.15.0-rc4-syzkaller-00042-gb6ea1680d0ac #0 PREEMPT(full)
[ 89.275971][ T5826] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
[ 89.275988][ T5826] Call Trace:
[ 89.275996][ T5826]
[ 89.276007][ T5826] dump_stack_lvl+0x189/0x250
[ 89.276041][ T5826] ? __pfx_dump_stack_lvl+0x10/0x10
[ 89.276068][ T5826] ? __pfx__printk+0x10/0x10
[ 89.276103][ T5826] ? _raw_spin_unlock_irqrestore+0x85/0x110
[ 89.276148][ T5826] ubsan_epilogue+0xa/0x40
[ 89.276168][ T5826] __ubsan_handle_out_of_bounds+0xe9/0xf0
[ 89.276201][ T5826] dtInsertEntry+0x936/0x1430
[ 89.276259][ T5826] dtSplitPage+0x2a83/0x3b20
[ 89.276352][ T5826] dtInsert+0x109b/0x5f40
[ 89.276392][ T5826] ? txLockAlloc+0x239/0x380
[ 89.276415][ T5826] ? __pfx_txLockAlloc+0x10/0x10
[ 89.276453][ T5826] ? __pfx_dtInsert+0x10/0x10
[ 89.276475][ T5826] ? txLock+0xaf3/0x1cb0
[ 89.276525][ T5826] ? dtInitRoot+0x22a/0x670
[ 89.276555][ T5826] jfs_mkdir+0x6ec/0xa70
[ 89.276594][ T5826] ? __pfx_jfs_mkdir+0x10/0x10
[ 89.276650][ T5826] ? generic_permission+0x2e5/0x690
[ 89.276679][ T5826] ? bpf_lsm_inode_mkdir+0x9/0x20
[ 89.276701][ T5826] vfs_mkdir+0x303/0x510
[ 89.276733][ T5826] do_mkdirat+0x247/0x590
[ 89.276761][ T5826] ? __pfx_do_mkdirat+0x10/0x10
[ 89.276791][ T5826] ? getname_flags+0x1e5/0x540
[ 89.276825][ T5826] __x64_sys_mkdir+0x6c/0x80
[ 89.276850][ T5826] do_syscall_64+0xf6/0x210
[ 89.276874][ T5826] ? clear_bhb_loop+0x45/0xa0
[ 89.276907][ T5826] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 89.276926][ T5826] RIP: 0033:0x7f9d593dfb97
[ 89.276949][ T5826] Code: ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
[ 89.276965][ T5826] RSP: 002b:00007ffe6048aee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
[ 89.277007][ T5826] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9d593dfb97
[ 89.277021][ T5826] RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000040
[ 89.277034][ T5826] RBP: 0000200000000040 R08: 0000000000000000 R09: 00002000000000c0
[ 89.277047][ T5826] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000140
[ 89.277059][ T5826] R13: 00007ffe6048af80 R14: 0000000000000000 R15: 0000000000000000
[ 89.277091][ T5826]
[ 89.277098][ T5826] ---[ end trace ]---
[ 89.509700][ T5826] Kernel panic - not syncing: UBSAN: panic_on_warn set ...
[ 89.516898][ T5826] CPU: 0 UID: 0 PID: 5826 Comm: syz-executor246 Not tainted 6.15.0-rc4-syzkaller-00042-gb6ea1680d0ac #0 PREEMPT(full)
[ 89.529306][ T5826] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
[ 89.539367][ T5826] Call Trace:
[ 89.542652][ T5826]
[ 89.545581][ T5826] dump_stack_lvl+0x99/0x250
[ 89.550176][ T5826] ? __asan_memcpy+0x40/0x70
[ 89.554769][ T5826] ? __pfx_dump_stack_lvl+0x10/0x10
[ 89.559976][ T5826] ? __pfx__printk+0x10/0x10
[ 89.564583][ T5826] panic+0x2db/0x790
[ 89.568572][ T5826] ? __pfx_panic+0x10/0x10
[ 89.572988][ T5826] ? _printk+0xcf/0x120
[ 89.577154][ T5826] ? __pfx__printk+0x10/0x10
[ 89.581753][ T5826] ? _raw_spin_unlock_irqrestore+0x85/0x110
[ 89.587668][ T5826] check_panic_on_warn+0x89/0xb0
[ 89.592611][ T5826] __ubsan_handle_out_of_bounds+0xe9/0xf0
[ 89.598342][ T5826] dtInsertEntry+0x936/0x1430
[ 89.603042][ T5826] dtSplitPage+0x2a83/0x3b20
[ 89.607683][ T5826] dtInsert+0x109b/0x5f40
[ 89.612028][ T5826] ? txLockAlloc+0x239/0x380
[ 89.616635][ T5826] ? __pfx_txLockAlloc+0x10/0x10
[ 89.621598][ T5826] ? __pfx_dtInsert+0x10/0x10
[ 89.626288][ T5826] ? txLock+0xaf3/0x1cb0
[ 89.630645][ T5826] ? dtInitRoot+0x22a/0x670
[ 89.635190][ T5826] jfs_mkdir+0x6ec/0xa70
[ 89.639469][ T5826] ? __pfx_jfs_mkdir+0x10/0x10
[ 89.644266][ T5826] ? generic_permission+0x2e5/0x690
[ 89.649482][ T5826] ? bpf_lsm_inode_mkdir+0x9/0x20
[ 89.654517][ T5826] vfs_mkdir+0x303/0x510
[ 89.658913][ T5826] do_mkdirat+0x247/0x590
[ 89.663270][ T5826] ? __pfx_do_mkdirat+0x10/0x10
[ 89.668150][ T5826] ? getname_flags+0x1e5/0x540
[ 89.672934][ T5826] __x64_sys_mkdir+0x6c/0x80
[ 89.677543][ T5826] do_syscall_64+0xf6/0x210
[ 89.682063][ T5826] ? clear_bhb_loop+0x45/0xa0
[ 89.686762][ T5826] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 89.692709][ T5826] RIP: 0033:0x7f9d593dfb97
[ 89.697130][ T5826] Code: ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
[ 89.716745][ T5826] RSP: 002b:00007ffe6048aee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
[ 89.725165][ T5826] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9d593dfb97
[ 89.733166][ T5826] RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000040
[ 89.741233][ T5826] RBP: 0000200000000040 R08: 0000000000000000 R09: 00002000000000c0
[ 89.749214][ T5826] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000140
[ 89.757280][ T5826] R13: 00007ffe6048af80 R14: 0000000000000000 R15: 0000000000000000
[ 89.765274][ T5826]
[ 89.768668][ T5826] Kernel Offset: disabled
[ 89.773024][ T5826] Rebooting in 86400 seconds..