./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2878815562 <...> Warning: Permanently added '10.128.0.147' (ED25519) to the list of known hosts. execve("./syz-executor2878815562", ["./syz-executor2878815562"], 0x7ffdf6b3bc70 /* 10 vars */) = 0 brk(NULL) = 0x55555b892000 brk(0x55555b892d00) = 0x55555b892d00 arch_prctl(ARCH_SET_FS, 0x55555b892380) = 0 set_tid_address(0x55555b892650) = 5820 set_robust_list(0x55555b892660, 24) = 0 rseq(0x55555b892ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2878815562", 4096) = 28 getrandom("\xce\x0a\xee\x1d\x62\xcb\x46\x2e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555b892d00 brk(0x55555b8b3d00) = 0x55555b8b3d00 brk(0x55555b8b4000) = 0x55555b8b4000 mprotect(0x7f7cc48a3000, 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 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 5821 attached , child_tidptr=0x55555b892650) = 5821 [pid 5821] set_robust_list(0x55555b892660, 24) = 0 [pid 5821] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5821] setpgid(0, 0) = 0 [pid 5821] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "1000", 4) = 4 [pid 5821] close(3) = 0 [pid 5821] write(1, "executing program\n", 18executing program ) = 18 [pid 5821] memfd_create("syzkaller", 0) = 3 [pid 5821] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7cbc200000 [pid 5821] 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"..., 2097152) = 2097152 [pid 5821] munmap(0x7f7cbc200000, 138412032) = 0 [pid 5821] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5821] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5821] close(3) = 0 [pid 5821] close(4) = 0 [pid 5821] mkdir("./file1", 0777) = 0 [ 79.943988][ T5821] loop0: detected capacity change from 0 to 4096 [pid 5821] mount("/dev/loop0", "./file1", "nilfs2", 0, "") = 0 [pid 5821] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5821] chdir("./file1") = 0 [pid 5821] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5821] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_DIRECT|O_NOFOLLOW|O_NOATIME, 000) = 4 [pid 5821] mkdir("\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", 000) = 0 [ 79.984451][ T5823] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 80.010935][ T29] audit: type=1800 audit(1738379194.767:2): pid=5821 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor287" name="bus" dev="loop0" ino=11 res=0 errno=0 [ 80.035761][ T5821] Oops: general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] PREEMPT SMP KASAN PTI [ 80.048394][ T5821] KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] [ 80.057040][ T5821] CPU: 0 UID: 0 PID: 5821 Comm: syz-executor287 Not tainted 6.13.0-syzkaller-09793-g69b8923f5003 #0 [ 80.068047][ T5821] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 80.078220][ T5821] RIP: 0010:__d_unalias+0x199/0x2a0 [ 80.083582][ T5821] Code: 98 00 00 00 4c 89 fb 48 c1 eb 03 49 89 ed 80 3c 2b 00 74 08 4c 89 ff e8 65 62 e7 ff 49 8b 2f 48 83 c5 68 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 48 62 e7 ff 4c 8b 5d 00 4d 85 db [ 80.103305][ T5821] RSP: 0018:ffffc90003d9fa98 EFLAGS: 00010202 [ 80.109392][ T5821] RAX: 000000000000000d RBX: 1ffff1100996cb61 RCX: ffff88804d821e00 [ 80.117456][ T5821] RDX: 0000000000000000 RSI: ffff88804cb65a70 RDI: ffff88804cb658f8 [ 80.125435][ T5821] RBP: 0000000000000068 R08: ffff88804e530f6b R09: 1ffff11009ca61ed [ 80.133679][ T5821] R10: dffffc0000000000 R11: ffffed1009ca61ee R12: ffff88804cb65a70 [ 80.141675][ T5821] R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88804cb65b08 [ 80.149678][ T5821] FS: 000055555b892380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 [ 80.158633][ T5821] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.165482][ T5821] CR2: 00007ffe074ff000 CR3: 0000000078440000 CR4: 00000000003526f0 [ 80.173547][ T5821] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.181527][ T5821] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.189506][ T5821] Call Trace: [ 80.192792][ T5821] [ 80.195821][ T5821] ? __die_body+0x5f/0xb0 [ 80.200271][ T5821] ? die_addr+0xb0/0xe0 [ 80.204443][ T5821] ? exc_general_protection+0x3dd/0x5d0 [ 80.210026][ T5821] ? asm_exc_general_protection+0x26/0x30 [ 80.216398][ T5821] ? __d_unalias+0x199/0x2a0 [ 80.221019][ T5821] ? __d_unalias+0x162/0x2a0 [ 80.225867][ T5821] d_splice_alias+0x1e6/0x330 [ 80.231025][ T5821] nilfs_lookup+0x1c2/0x2a0 [ 80.235580][ T5821] ? __pfx_nilfs_lookup+0x10/0x10 [ 80.240626][ T5821] ? _raw_spin_unlock+0x28/0x50 [ 80.245693][ T5821] ? d_alloc+0x142/0x190 [ 80.249984][ T5821] lookup_one_qstr_excl+0x126/0x2b0 [ 80.255364][ T5821] do_renameat2+0x706/0x13f0 [ 80.260099][ T5821] ? __pfx_do_renameat2+0x10/0x10 [ 80.265287][ T5821] ? __virt_addr_valid+0x183/0x530 [ 80.270455][ T5821] ? __virt_addr_valid+0x45f/0x530 [ 80.275599][ T5821] ? __phys_addr_symbol+0x2f/0x70 [ 80.280644][ T5821] ? strncpy_from_user+0x146/0x270 [ 80.285768][ T5821] ? getname_flags+0x1e3/0x540 [ 80.290547][ T5821] __x64_sys_rename+0x82/0x90 [ 80.295257][ T5821] do_syscall_64+0xf3/0x230 [ 80.300044][ T5821] ? clear_bhb_loop+0x35/0x90 [ 80.304855][ T5821] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 80.310771][ T5821] RIP: 0033:0x7f7cc482fad9 [ 80.315295][ T5821] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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 [ 80.335113][ T5821] RSP: 002b:00007ffe074fe328 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 [ 80.343633][ T5821] RAX: ffffffffffffffda RBX: 00007f7cc4878fc8 RCX: 00007f7cc482fad9 [ 80.351616][ T5821] RDX: 0000000000000000 RSI: 0000000020000800 RDI: 00000000200001c0 [ 80.359617][ T5821] RBP: 00007f7cc48a35f0 R08: 000055555b8934c0 R09: 000055555b8934c0 [ 80.367662][ T5821] R10: 000055555b8934c0 R11: 0000000000000246 R12: 00007ffe074fe350 [ 80.375648][ T5821] R13: 00007ffe074fe578 R14: 431bde82d7b634db R15: 00007f7cc487803b [ 80.383639][ T5821] [ 80.386663][ T5821] Modules linked in: [ 80.390961][ T5821] ---[ end trace 0000000000000000 ]--- [ 80.396456][ T5821] RIP: 0010:__d_unalias+0x199/0x2a0 [ 80.401800][ T5821] Code: 98 00 00 00 4c 89 fb 48 c1 eb 03 49 89 ed 80 3c 2b 00 74 08 4c 89 ff e8 65 62 e7 ff 49 8b 2f 48 83 c5 68 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 48 62 e7 ff 4c 8b 5d 00 4d 85 db [ 80.422184][ T5821] RSP: 0018:ffffc90003d9fa98 EFLAGS: 00010202 [ 80.428436][ T5821] RAX: 000000000000000d RBX: 1ffff1100996cb61 RCX: ffff88804d821e00 [ 80.438106][ T5821] RDX: 0000000000000000 RSI: ffff88804cb65a70 RDI: ffff88804cb658f8 [ 80.446155][ T5821] RBP: 0000000000000068 R08: ffff88804e530f6b R09: 1ffff11009ca61ed [ 80.454167][ T5821] R10: dffffc0000000000 R11: ffffed1009ca61ee R12: ffff88804cb65a70 [ 80.462188][ T5821] R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88804cb65b08 [ 80.470293][ T5821] FS: 000055555b892380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 [ 80.479273][ T5821] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.485955][ T5821] CR2: 00007ffe074ff000 CR3: 0000000078440000 CR4: 00000000003526f0 [ 80.494056][ T5821] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.502282][ T5821] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.510335][ T5821] Kernel panic - not syncing: Fatal exception [ 80.516728][ T5821] Kernel Offset: disabled [ 80.521079][ T5821] Rebooting in 86400 seconds..