./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor447003257 <...> Warning: Permanently added '10.128.1.243' (ED25519) to the list of known hosts. execve("./syz-executor447003257", ["./syz-executor447003257"], 0x7ffdf063ca30 /* 10 vars */) = 0 brk(NULL) = 0x5555778ae000 brk(0x5555778aed00) = 0x5555778aed00 arch_prctl(ARCH_SET_FS, 0x5555778ae380) = 0 set_tid_address(0x5555778ae650) = 5080 set_robust_list(0x5555778ae660, 24) = 0 rseq(0x5555778aeca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor447003257", 4096) = 27 getrandom("\x94\x91\x27\x40\xf8\xc8\xea\x64", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555778aed00 brk(0x5555778cfd00) = 0x5555778cfd00 brk(0x5555778d0000) = 0x5555778d0000 mprotect(0x7f76bf342000, 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 5081 attached , child_tidptr=0x5555778ae650) = 5081 [pid 5081] set_robust_list(0x5555778ae660, 24) = 0 [pid 5081] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5081] setpgid(0, 0) = 0 [pid 5081] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5081] write(3, "1000", 4) = 4 [pid 5081] close(3) = 0 [pid 5081] write(1, "executing program\n", 18executing program ) = 18 [pid 5081] memfd_create("syzkaller", 0) = 3 [pid 5081] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f76b6e00000 [pid 5081] write(3, "\xeb\x52\x90\x4e\x54\x46\x53\x20\x20\x20\x20\x00\x08\x01\x00\x00\x00\x00\x00\x00\x00\xf8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x00\x80\x00\xff\x03\x00\x00\x00\x00\x00\x00\xff\x01\x00\x00\x00\x00\x00\x00\xff\x01\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x02\x00\x00\x00\xbb\x02\x87\x1c\xc7\xbb\xb3\x5e\x00\x00\x00\x00\x0e\x1f\xbe\x71\x7c\xac\x22\xc0\x74\x0b\x56\xb4\x0e\xbb\x07\x00"..., 2097152) = 2097152 [pid 5081] munmap(0x7f76b6e00000, 138412032) = 0 [pid 5081] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5081] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5081] close(3) = 0 [pid 5081] close(4) = 0 [pid 5081] mkdir("./file1", 0777) = 0 [ 78.793342][ T5081] loop0: detected capacity change from 0 to 4096 [ 78.831192][ T5081] ntfs3: loop0: Different NTFS sector size (2048) and media sector size (512). [pid 5081] mount("/dev/loop0", "./file1", "ntfs3", 0, "") = 0 [pid 5081] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5081] chdir("./file1") = 0 [pid 5081] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5081] creat("./bus", 000) = 4 [pid 5081] creat("./bus", 000) = 5 [pid 5081] lseek(4, 65535, SEEK_SET) = 65535 [pid 5081] ftruncate(5, 31) = 0 [ 78.854651][ T5081] ntfs3: loop0: Mark volume as dirty due to NTFS errors [ 78.909080][ T5081] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 78.916926][ T5081] #PF: supervisor instruction fetch in kernel mode [ 78.923428][ T5081] #PF: error_code(0x0010) - not-present page [ 78.929395][ T5081] PGD 800000007804f067 P4D 800000007804f067 PUD 1fb04067 PMD 0 [ 78.937043][ T5081] Oops: Oops: 0010 [#1] PREEMPT SMP KASAN PTI [ 78.943106][ T5081] CPU: 0 PID: 5081 Comm: syz-executor447 Not tainted 6.10.0-rc7-syzkaller-00012-g34afb82a3c67 #0 [ 78.953599][ T5081] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 [ 78.963670][ T5081] RIP: 0010:0x0 [ 78.967154][ T5081] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 78.974516][ T5081] RSP: 0018:ffffc90003e7f698 EFLAGS: 00010282 [ 78.980585][ T5081] RAX: 1ffffffff17f8f3b RBX: 0000000000000000 RCX: dffffc0000000000 [ 78.988573][ T5081] RDX: 0000000000000000 RSI: ffffea0001e21a00 RDI: ffff888079ef8478 [ 78.996541][ T5081] RBP: ffffc90003e7f800 R08: ffffffff81cfb65a R09: 1ffffd40003c4340 [ 79.004527][ T5081] R10: dffffc0000000000 R11: 0000000000000000 R12: ffff888054957148 [ 79.012496][ T5081] R13: ffff888054957160 R14: ffffea0001e21a00 R15: 1ffff920007cfee8 [ 79.020479][ T5081] FS: 00005555778ae380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 [ 79.029422][ T5081] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 79.036005][ T5081] CR2: ffffffffffffffd6 CR3: 000000001f458000 CR4: 00000000003506f0 [ 79.043981][ T5081] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 79.051954][ T5081] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 79.059929][ T5081] Call Trace: [ 79.063286][ T5081] [ 79.066225][ T5081] ? __die_body+0x88/0xe0 [ 79.070587][ T5081] ? page_fault_oops+0x8e4/0xcc0 [ 79.075529][ T5081] ? __pfx_page_fault_oops+0x10/0x10 [ 79.080815][ T5081] ? folio_batch_add_and_move+0x165/0x2b0 [ 79.086546][ T5081] ? __pfx_lru_add_fn+0x10/0x10 [ 79.091392][ T5081] ? folio_add_lru+0x27b/0x9e0 [ 79.096151][ T5081] ? rcu_is_watching+0x15/0xb0 [ 79.100909][ T5081] ? is_errata93+0xbe/0x260 [ 79.105407][ T5081] ? exc_page_fault+0x5ed/0x8c0 [ 79.110262][ T5081] ? asm_exc_page_fault+0x26/0x30 [ 79.115288][ T5081] ? folio_mark_dirty+0xba/0x370 [ 79.120227][ T5081] attr_make_nonresident+0xa49/0xe80 [ 79.125527][ T5081] ? __pfx_attr_make_nonresident+0x10/0x10 [ 79.131330][ T5081] ? __pfx_ni_find_attr+0x10/0x10 [ 79.136376][ T5081] attr_set_size+0x711/0x4290 [ 79.141062][ T5081] ? __lock_acquire+0x1346/0x1fd0 [ 79.146089][ T5081] ? __pfx_attr_set_size+0x10/0x10 [ 79.151199][ T5081] ? __pfx_lock_acquire+0x10/0x10 [ 79.156220][ T5081] ? __down_write_common+0x162/0x200 [ 79.161512][ T5081] ? __pfx___down_write_common+0x10/0x10 [ 79.167146][ T5081] ? current_time+0x203/0x2b0 [ 79.171839][ T5081] ntfs_set_size+0x161/0x200 [ 79.176433][ T5081] ntfs_extend+0x16d/0x4a0 [ 79.180848][ T5081] ntfs_file_write_iter+0x3ea/0x770 [ 79.186048][ T5081] vfs_write+0xa72/0xc90 [ 79.190307][ T5081] ? __pfx_ntfs_file_write_iter+0x10/0x10 [ 79.196112][ T5081] ? __pfx_vfs_write+0x10/0x10 [ 79.200885][ T5081] ? lockdep_hardirqs_on+0x99/0x150 [ 79.206086][ T5081] ksys_write+0x1a0/0x2c0 [ 79.210463][ T5081] ? __pfx_ksys_write+0x10/0x10 [ 79.215345][ T5081] ? do_syscall_64+0x100/0x230 [ 79.220128][ T5081] do_syscall_64+0xf3/0x230 [ 79.224634][ T5081] ? clear_bhb_loop+0x35/0x90 [ 79.229313][ T5081] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.235206][ T5081] RIP: 0033:0x7f76bf2afbd9 [ 79.239615][ T5081] 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 [ 79.259238][ T5081] RSP: 002b:00007ffc6a77d368 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 79.267673][ T5081] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f76bf2afbd9 [ 79.275660][ T5081] RDX: 0000000000000078 RSI: 0000000020000600 RDI: 0000000000000004 [ 79.283639][ T5081] RBP: 00007f76bf3425f0 R08: 00005555778af4c0 R09: 00005555778af4c0 [ 79.291604][ T5081] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc6a77d390 [ 79.299569][ T5081] R13: 00007ffc6a77d5b8 R14: 431bde82d7b634db R15: 00007f76bf2f803b [ 79.307544][ T5081] [ 79.310563][ T5081] Modules linked in: [ 79.314472][ T5081] CR2: 0000000000000000 [ 79.318624][ T5081] ---[ end trace 0000000000000000 ]--- [ 79.324071][ T5081] RIP: 0010:0x0 [ 79.327534][ T5081] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 79.334895][ T5081] RSP: 0018:ffffc90003e7f698 EFLAGS: 00010282 [ 79.340959][ T5081] RAX: 1ffffffff17f8f3b RBX: 0000000000000000 RCX: dffffc0000000000 [ 79.348922][ T5081] RDX: 0000000000000000 RSI: ffffea0001e21a00 RDI: ffff888079ef8478 [ 79.356887][ T5081] RBP: ffffc90003e7f800 R08: ffffffff81cfb65a R09: 1ffffd40003c4340 [ 79.364858][ T5081] R10: dffffc0000000000 R11: 0000000000000000 R12: ffff888054957148 [ 79.372827][ T5081] R13: ffff888054957160 R14: ffffea0001e21a00 R15: 1ffff920007cfee8 [ 79.380792][ T5081] FS: 00005555778ae380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 [ 79.389712][ T5081] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 79.396287][ T5081] CR2: ffffffffffffffd6 CR3: 000000001f458000 CR4: 00000000003506f0 [ 79.404256][ T5081] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 79.412221][ T5081] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 79.420186][ T5081] Kernel panic - not syncing: Fatal exception [ 79.426525][ T5081] Kernel Offset: disabled [ 79.430856][ T5081] Rebooting in 86400 seconds..