./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor941599755 <...> Warning: Permanently added '10.128.0.33' (ED25519) to the list of known hosts. execve("./syz-executor941599755", ["./syz-executor941599755"], 0x7fff8461cfd0 /* 10 vars */) = 0 brk(NULL) = 0x5555677d2000 brk(0x5555677d2d00) = 0x5555677d2d00 arch_prctl(ARCH_SET_FS, 0x5555677d2380) = 0 set_tid_address(0x5555677d2650) = 5821 set_robust_list(0x5555677d2660, 24) = 0 rseq(0x5555677d2ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor941599755", 4096) = 27 getrandom("\x9c\xc1\x67\xa7\x88\x26\x93\x10", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555677d2d00 brk(0x5555677f3d00) = 0x5555677f3d00 brk(0x5555677f4000) = 0x5555677f4000 mprotect(0x7f09dbacf000, 16384, PROT_READ) = 0 [ 91.980015][ T1223] cfg80211: failed to load regulatory.db 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 mkdir("./syzkaller.uxAOyZ", 0700) = 0 chmod("./syzkaller.uxAOyZ", 0777) = 0 chdir("./syzkaller.uxAOyZ") = 0 mkdir("./0", 0777) = 0 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 5822 attached , child_tidptr=0x5555677d2650) = 5822 [pid 5822] set_robust_list(0x5555677d2660, 24) = 0 [pid 5822] chdir("./0") = 0 [pid 5822] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5822] setpgid(0, 0) = 0 [pid 5822] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5822] write(3, "1000", 4) = 4 [pid 5822] close(3) = 0 [pid 5822] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5822] write(1, "executing program\n", 18executing program ) = 18 [pid 5822] open(NULL, O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 042) = -1 EFAULT (Bad address) [pid 5822] memfd_create("syzkaller", 0) = 3 [pid 5822] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f09d3600000 [pid 5822] 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"..., 32768) = 32768 [pid 5822] munmap(0x7f09d3600000, 138412032) = 0 [pid 5822] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5822] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5822] close(3) = 0 [pid 5822] close(4) = 0 [pid 5822] mkdir("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 0777) = 0 [pid 5822] mount("/dev/loop0", "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", "hfs", MS_DIRSYNC|MS_NODIRATIME|MS_POSIXACL|MS_I_VERSION|MS_LAZYTIME, "") = 0 [pid 5822] openat(AT_FDCWD, "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", O_RDONLY|O_DIRECTORY) = 3 [pid 5822] chdir("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa") = 0 [ 92.212313][ T5822] loop0: detected capacity change from 0 to 64 [pid 5822] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5822] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT, 000) = 4 [pid 5822] exit_group(0) = ? [pid 5822] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5822, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555677d36f0 /* 4 entries */, 32768) = 360 [ 92.363896][ T54] ------------[ cut here ]------------ [ 92.369704][ T54] kernel BUG at fs/hfs/inode.c:444! [ 92.376539][ T54] Oops: invalid opcode: 0000 [#1] SMP KASAN PTI [ 92.383163][ T54] CPU: 1 UID: 0 PID: 54 Comm: kworker/u8:3 Not tainted 6.15.0-rc5-syzkaller-00275-gbec6f00f120e #0 PREEMPT(full) [ 92.395328][ T54] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 92.405399][ T54] Workqueue: writeback wb_workfn (flush-7:0) [ 92.411430][ T54] RIP: 0010:hfs_write_inode+0x7c8/0x7d0 [ 92.417002][ T54] Code: c1 c0 65 81 99 80 e1 07 80 c1 03 38 c1 0f 8c 7d fe ff ff 48 c7 c7 c0 65 81 99 e8 43 ee 89 ff e9 6c fe ff ff e8 79 1f 2a ff 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 [ 92.437017][ T54] RSP: 0018:ffffc90000bf7220 EFLAGS: 00010293 [ 92.443509][ T54] RAX: ffffffff8295afc7 RBX: ffff888033a48198 RCX: ffff88801f6ada00 [ 92.452456][ T54] RDX: 0000000000000000 RSI: ffffffff8e15ff40 RDI: 0000000000000000 [ 92.461148][ T54] RBP: ffffc90000bf73b0 R08: ffff88801f6ada00 R09: 0000000000000003 [ 92.471246][ T54] R10: 0000000000000004 R11: 0000000000000000 R12: dffffc0000000000 [ 92.479321][ T54] R13: 1ffff9200017ee48 R14: ffff888033a48158 R15: 0000000000000000 [ 92.487472][ T54] FS: 0000000000000000(0000) GS:ffff888126200000(0000) knlGS:0000000000000000 [ 92.496511][ T54] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.503662][ T54] CR2: 00005555677db6f8 CR3: 000000007fa60000 CR4: 00000000003526f0 [ 92.511655][ T54] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.520048][ T54] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.528310][ T54] Call Trace: [ 92.531624][ T54] [ 92.534563][ T54] ? __pfx_hfs_write_inode+0x10/0x10 [ 92.539886][ T54] __writeback_single_inode+0x6ee/0xff0 [ 92.545540][ T54] writeback_sb_inodes+0x6b5/0x1000 [ 92.550797][ T54] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 92.556445][ T54] ? rcu_is_watching+0x15/0xb0 [ 92.561238][ T54] wb_writeback+0x43b/0xaf0 [ 92.565774][ T54] ? queue_io+0x341/0x590 [ 92.570159][ T54] ? __pfx_wb_writeback+0x10/0x10 [ 92.575219][ T54] ? _raw_spin_unlock_irq+0x23/0x50 [ 92.580442][ T54] wb_workfn+0x409/0xef0 [ 92.584694][ T54] ? __pfx_wb_workfn+0x10/0x10 [ 92.589580][ T54] ? register_lock_class+0x51/0x320 [ 92.594780][ T54] ? __lock_acquire+0xaac/0xd20 [ 92.599644][ T54] ? process_scheduled_works+0x9ec/0x17a0 [ 92.605391][ T54] ? _raw_spin_unlock_irq+0x23/0x50 [ 92.610708][ T54] ? process_scheduled_works+0x9ec/0x17a0 [ 92.616652][ T54] ? process_scheduled_works+0x9ec/0x17a0 [ 92.622490][ T54] process_scheduled_works+0xadb/0x17a0 [ 92.628170][ T54] ? __pfx_process_scheduled_works+0x10/0x10 [ 92.634172][ T54] worker_thread+0x8a0/0xda0 [ 92.638889][ T54] kthread+0x70e/0x8a0 [ 92.643016][ T54] ? __pfx_worker_thread+0x10/0x10 [ 92.649623][ T54] ? __pfx_kthread+0x10/0x10 [ 92.654247][ T54] ? __pfx_kthread+0x10/0x10 [ 92.658876][ T54] ? _raw_spin_unlock_irq+0x23/0x50 [ 92.665027][ T54] ? lockdep_hardirqs_on+0x9c/0x150 [ 92.671051][ T54] ? __pfx_kthread+0x10/0x10 [ 92.675654][ T54] ret_from_fork+0x4b/0x80 [ 92.680532][ T54] ? __pfx_kthread+0x10/0x10 [ 92.685223][ T54] ret_from_fork_asm+0x1a/0x30 [ 92.690005][ T54] [ 92.693020][ T54] Modules linked in: [ 92.697066][ T54] ---[ end trace 0000000000000000 ]--- [ 92.702769][ T54] RIP: 0010:hfs_write_inode+0x7c8/0x7d0 [ 92.708402][ T54] Code: c1 c0 65 81 99 80 e1 07 80 c1 03 38 c1 0f 8c 7d fe ff ff 48 c7 c7 c0 65 81 99 e8 43 ee 89 ff e9 6c fe ff ff e8 79 1f 2a ff 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 [ 92.728283][ T54] RSP: 0018:ffffc90000bf7220 EFLAGS: 00010293 [ 92.734443][ T54] RAX: ffffffff8295afc7 RBX: ffff888033a48198 RCX: ffff88801f6ada00 [ 92.742573][ T54] RDX: 0000000000000000 RSI: ffffffff8e15ff40 RDI: 0000000000000000 [ 92.750705][ T54] RBP: ffffc90000bf73b0 R08: ffff88801f6ada00 R09: 0000000000000003 [ 92.758815][ T54] R10: 0000000000000004 R11: 0000000000000000 R12: dffffc0000000000 [ 92.766835][ T54] R13: 1ffff9200017ee48 R14: ffff888033a48158 R15: 0000000000000000 [ 92.774886][ T54] FS: 0000000000000000(0000) GS:ffff888126200000(0000) knlGS:0000000000000000 [ 92.783877][ T54] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.790540][ T54] CR2: 00005555677db6f8 CR3: 000000007fa60000 CR4: 00000000003526f0 [ 92.798565][ T54] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.806843][ T54] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.815813][ T54] Kernel panic - not syncing: Fatal exception [ 92.822322][ T54] Kernel Offset: disabled [ 92.826864][ T54] Rebooting in 86400 seconds..