./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4021345299 <...> Warning: Permanently added '10.128.0.147' (ED25519) to the list of known hosts. execve("./syz-executor4021345299", ["./syz-executor4021345299"], 0x7fff1135b9d0 /* 10 vars */) = 0 brk(NULL) = 0x55556e0b8000 brk(0x55556e0b8d00) = 0x55556e0b8d00 arch_prctl(ARCH_SET_FS, 0x55556e0b8380) = 0 set_tid_address(0x55556e0b8650) = 5840 set_robust_list(0x55556e0b8660, 24) = 0 rseq(0x55556e0b8ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4021345299", 4096) = 28 getrandom("\xcf\x9b\xc2\xfb\xc5\x70\xf2\x53", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556e0b8d00 brk(0x55556e0d9d00) = 0x55556e0d9d00 brk(0x55556e0da000) = 0x55556e0da000 mprotect(0x7f9a23729000, 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 5842 attached [pid 5842] set_robust_list(0x55556e0b8660, 24) = 0 [pid 5840] <... clone resumed>, child_tidptr=0x55556e0b8650) = 5842 [pid 5842] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5842] setpgid(0, 0) = 0 [pid 5842] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5842] write(3, "1000", 4) = 4 [pid 5842] close(3) = 0 [pid 5842] write(1, "executing program\n", 18executing program ) = 18 [pid 5842] memfd_create("syzkaller", 0) = 3 [pid 5842] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9a1b200000 [pid 5842] 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 [pid 5842] munmap(0x7f9a1b200000, 138412032) = 0 [pid 5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5842] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5842] close(3) = 0 [pid 5842] close(4) = 0 [pid 5842] mkdir("./file0", 0777) = 0 [ 62.198986][ T5842] loop0: detected capacity change from 0 to 2048 [pid 5842] mount("/dev/loop0", "./file0", "udf", 0, "noadinicb,nostrict,mode=00000000000000000000004,uid=forget,noadinicb,umask=00000000000000040002000,l"...) = 0 [pid 5842] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5842] chdir("./file0") = 0 [pid 5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5842] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT|O_SYNC, 000) = 4 [pid 5842] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", S_ISGID|010) = 0 [pid 5842] unlinkat(AT_FDCWD, "./file1", 0) = 0 [ 62.251179][ T5842] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [ 62.315784][ T5842] ------------[ cut here ]------------ [ 62.321354][ T5842] WARNING: CPU: 0 PID: 5842 at fs/inode.c:407 drop_nlink+0xc4/0x110 [ 62.329506][ T5842] Modules linked in: [ 62.333449][ T5842] CPU: 0 UID: 0 PID: 5842 Comm: syz-executor402 Not tainted 6.12.0-syzkaller-10313-g7d4050728c83 #0 [ 62.344363][ T5842] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 62.354599][ T5842] RIP: 0010:drop_nlink+0xc4/0x110 [ 62.359661][ T5842] Code: bb 70 07 00 00 be 08 00 00 00 e8 17 0a e6 ff f0 48 ff 83 70 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 6d 4b 7e ff 90 <0f> 0b 90 eb 83 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 5c ff ff ff [ 62.379379][ T5842] RSP: 0018:ffffc90003a47610 EFLAGS: 00010293 [ 62.385512][ T5842] RAX: ffffffff821794d3 RBX: 1ffff1100efb7100 RCX: ffff88807df10000 [ 62.393513][ T5842] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 62.401577][ T5842] RBP: 0000000000000000 R08: ffffffff82179453 R09: 1ffffffff203a59e [ 62.409628][ T5842] R10: dffffc0000000000 R11: fffffbfff203a59f R12: ffff888077db8800 [ 62.417685][ T5842] R13: ffffc90003a477d0 R14: ffff888077db87b8 R15: dffffc0000000000 [ 62.425708][ T5842] FS: 000055556e0b8380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 [ 62.434720][ T5842] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.441319][ T5842] CR2: 00000000200024c0 CR3: 000000007ae9c000 CR4: 00000000003526f0 [ 62.449369][ T5842] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.457396][ T5842] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.465421][ T5842] Call Trace: [ 62.468718][ T5842] [ 62.471646][ T5842] ? __warn+0x168/0x4e0 [ 62.475907][ T5842] ? drop_nlink+0xc4/0x110 [ 62.480349][ T5842] ? report_bug+0x2b3/0x500 [ 62.484941][ T5842] ? drop_nlink+0xc4/0x110 [ 62.489376][ T5842] ? handle_bug+0x60/0x90 [ 62.493733][ T5842] ? exc_invalid_op+0x1a/0x50 [ 62.498635][ T5842] ? asm_exc_invalid_op+0x1a/0x20 [ 62.503686][ T5842] ? drop_nlink+0x43/0x110 [ 62.508172][ T5842] ? drop_nlink+0xc3/0x110 [ 62.512610][ T5842] ? drop_nlink+0xc4/0x110 [ 62.517101][ T5842] udf_rename+0x969/0xe10 [ 62.521469][ T5842] ? __pfx_udf_rename+0x10/0x10 [ 62.526486][ T5842] ? mark_lock+0x2ae/0x360 [ 62.530926][ T5842] ? __lock_acquire+0x1397/0x2100 [ 62.536054][ T5842] ? __pfx___might_resched+0x10/0x10 [ 62.541370][ T5842] ? down_write_nested+0x195/0x220 [ 62.546553][ T5842] ? __pfx_down_write_nested+0x10/0x10 [ 62.552143][ T5842] ? do_raw_spin_unlock+0x13c/0x8b0 [ 62.557436][ T5842] ? __pfx_udf_rename+0x10/0x10 [ 62.562311][ T5842] vfs_rename+0xbdb/0xf00 [ 62.566799][ T5842] ? __pfx_vfs_rename+0x10/0x10 [ 62.571675][ T5842] ? bpf_lsm_path_rename+0x9/0x10 [ 62.576780][ T5842] do_renameat2+0xd94/0x13f0 [ 62.581435][ T5842] ? __pfx_do_renameat2+0x10/0x10 [ 62.586522][ T5842] ? __virt_addr_valid+0x183/0x530 [ 62.591657][ T5842] ? __check_object_size+0x48e/0x900 [ 62.597058][ T5842] ? strncpy_from_user+0x152/0x270 [ 62.602195][ T5842] ? getname_flags+0x1e3/0x540 [ 62.607013][ T5842] __x64_sys_rename+0x82/0x90 [ 62.611710][ T5842] do_syscall_64+0xf3/0x230 [ 62.616321][ T5842] ? clear_bhb_loop+0x35/0x90 [ 62.621027][ T5842] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 62.626996][ T5842] RIP: 0033:0x7f9a236b5ad9 [ 62.631476][ T5842] 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 [ 62.651209][ T5842] RSP: 002b:00007ffcd3d34c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 [ 62.659713][ T5842] RAX: ffffffffffffffda RBX: 00007f9a236fed88 RCX: 00007f9a236b5ad9 [ 62.667772][ T5842] RDX: 0000000000000000 RSI: 0000000020000f00 RDI: 00000000200024c0 [ 62.675904][ T5842] RBP: 0031656c69662f2e R08: 000055556e0b94c0 R09: 000055556e0b94c0 [ 62.684009][ T5842] R10: 000055556e0b94c0 R11: 0000000000000246 R12: 00007ffcd3d34ca0 [ 62.692016][ T5842] R13: 00007ffcd3d34ec8 R14: 431bde82d7b634db R15: 00007f9a236fe03b [ 62.700062][ T5842] [ 62.703110][ T5842] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 62.710521][ T5842] CPU: 0 UID: 0 PID: 5842 Comm: syz-executor402 Not tainted 6.12.0-syzkaller-10313-g7d4050728c83 #0 [ 62.721366][ T5842] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 62.731419][ T5842] Call Trace: [ 62.734730][ T5842] [ 62.737661][ T5842] dump_stack_lvl+0x241/0x360 [ 62.742331][ T5842] ? __pfx_dump_stack_lvl+0x10/0x10 [ 62.747527][ T5842] ? __pfx__printk+0x10/0x10 [ 62.752240][ T5842] ? _printk+0xd5/0x120 [ 62.756421][ T5842] ? __init_begin+0x41000/0x41000 [ 62.761458][ T5842] ? vscnprintf+0x5d/0x90 [ 62.765793][ T5842] panic+0x349/0x880 [ 62.769688][ T5842] ? __warn+0x177/0x4e0 [ 62.773844][ T5842] ? __pfx_panic+0x10/0x10 [ 62.778333][ T5842] ? show_trace_log_lvl+0x3b2/0x410 [ 62.783533][ T5842] __warn+0x34b/0x4e0 [ 62.787516][ T5842] ? drop_nlink+0xc4/0x110 [ 62.791929][ T5842] report_bug+0x2b3/0x500 [ 62.796251][ T5842] ? drop_nlink+0xc4/0x110 [ 62.800658][ T5842] handle_bug+0x60/0x90 [ 62.804807][ T5842] exc_invalid_op+0x1a/0x50 [ 62.809314][ T5842] asm_exc_invalid_op+0x1a/0x20 [ 62.814161][ T5842] RIP: 0010:drop_nlink+0xc4/0x110 [ 62.819191][ T5842] Code: bb 70 07 00 00 be 08 00 00 00 e8 17 0a e6 ff f0 48 ff 83 70 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 6d 4b 7e ff 90 <0f> 0b 90 eb 83 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 5c ff ff ff [ 62.838798][ T5842] RSP: 0018:ffffc90003a47610 EFLAGS: 00010293 [ 62.844866][ T5842] RAX: ffffffff821794d3 RBX: 1ffff1100efb7100 RCX: ffff88807df10000 [ 62.852842][ T5842] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 62.860812][ T5842] RBP: 0000000000000000 R08: ffffffff82179453 R09: 1ffffffff203a59e [ 62.868784][ T5842] R10: dffffc0000000000 R11: fffffbfff203a59f R12: ffff888077db8800 [ 62.876755][ T5842] R13: ffffc90003a477d0 R14: ffff888077db87b8 R15: dffffc0000000000 [ 62.884735][ T5842] ? drop_nlink+0x43/0x110 [ 62.889154][ T5842] ? drop_nlink+0xc3/0x110 [ 62.893577][ T5842] udf_rename+0x969/0xe10 [ 62.897921][ T5842] ? __pfx_udf_rename+0x10/0x10 [ 62.902773][ T5842] ? mark_lock+0x2ae/0x360 [ 62.907191][ T5842] ? __lock_acquire+0x1397/0x2100 [ 62.912236][ T5842] ? __pfx___might_resched+0x10/0x10 [ 62.917535][ T5842] ? down_write_nested+0x195/0x220 [ 62.922731][ T5842] ? __pfx_down_write_nested+0x10/0x10 [ 62.928207][ T5842] ? do_raw_spin_unlock+0x13c/0x8b0 [ 62.933438][ T5842] ? __pfx_udf_rename+0x10/0x10 [ 62.938302][ T5842] vfs_rename+0xbdb/0xf00 [ 62.942650][ T5842] ? __pfx_vfs_rename+0x10/0x10 [ 62.947509][ T5842] ? bpf_lsm_path_rename+0x9/0x10 [ 62.952542][ T5842] do_renameat2+0xd94/0x13f0 [ 62.957160][ T5842] ? __pfx_do_renameat2+0x10/0x10 [ 62.962191][ T5842] ? __virt_addr_valid+0x183/0x530 [ 62.967301][ T5842] ? __check_object_size+0x48e/0x900 [ 62.972613][ T5842] ? strncpy_from_user+0x152/0x270 [ 62.977736][ T5842] ? getname_flags+0x1e3/0x540 [ 62.982499][ T5842] __x64_sys_rename+0x82/0x90 [ 62.987174][ T5842] do_syscall_64+0xf3/0x230 [ 62.991683][ T5842] ? clear_bhb_loop+0x35/0x90 [ 62.996360][ T5842] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 63.002245][ T5842] RIP: 0033:0x7f9a236b5ad9 [ 63.006745][ T5842] 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 [ 63.026352][ T5842] RSP: 002b:00007ffcd3d34c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 [ 63.034769][ T5842] RAX: ffffffffffffffda RBX: 00007f9a236fed88 RCX: 00007f9a236b5ad9 [ 63.042735][ T5842] RDX: 0000000000000000 RSI: 0000000020000f00 RDI: 00000000200024c0 [ 63.050703][ T5842] RBP: 0031656c69662f2e R08: 000055556e0b94c0 R09: 000055556e0b94c0 [ 63.058699][ T5842] R10: 000055556e0b94c0 R11: 0000000000000246 R12: 00007ffcd3d34ca0 [ 63.066667][ T5842] R13: 00007ffcd3d34ec8 R14: 431bde82d7b634db R15: 00007f9a236fe03b [ 63.074734][ T5842] [ 63.078018][ T5842] Kernel Offset: disabled [ 63.082389][ T5842] Rebooting in 86400 seconds..