./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1918207956 <...> Warning: Permanently added '10.128.0.144' (ED25519) to the list of known hosts. execve("./syz-executor1918207956", ["./syz-executor1918207956"], 0x7fff547f8e40 /* 10 vars */) = 0 brk(NULL) = 0x5555952d5000 brk(0x5555952d5d00) = 0x5555952d5d00 arch_prctl(ARCH_SET_FS, 0x5555952d5380) = 0 set_tid_address(0x5555952d5650) = 5086 set_robust_list(0x5555952d5660, 24) = 0 rseq(0x5555952d5ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1918207956", 4096) = 28 getrandom("\x06\x6a\x27\x48\x5b\x0e\x93\x65", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555952d5d00 brk(0x5555952f6d00) = 0x5555952f6d00 brk(0x5555952f7000) = 0x5555952f7000 mprotect(0x7f455cc12000, 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 5087 attached , child_tidptr=0x5555952d5650) = 5087 [pid 5087] set_robust_list(0x5555952d5660, 24) = 0 [pid 5087] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5087] setpgid(0, 0) = 0 [pid 5087] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5087] write(3, "1000", 4) = 4 [pid 5087] close(3) = 0 [pid 5087] write(1, "executing program\n", 18executing program ) = 18 [pid 5087] memfd_create("syzkaller", 0) = 3 [pid 5087] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f4554600000 [pid 5087] 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 5087] munmap(0x7f4554600000, 138412032) = 0 [pid 5087] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5087] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5087] close(3) = 0 [pid 5087] close(4) = 0 [pid 5087] mkdir("./bus", 0777) = 0 syzkaller login: [ 77.903632][ T5087] loop0: detected capacity change from 0 to 4096 [ 77.941333][ T5087] ntfs3: loop0: Different NTFS sector size (2048) and media sector size (512). [pid 5087] mount("/dev/loop0", "./bus", "ntfs3", MS_REC|MS_SILENT, "") = 0 [pid 5087] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5087] chdir("./bus") = 0 [pid 5087] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5087] creat("./bus", 000) = 4 [pid 5087] ftruncate(4, 31) = 0 [ 77.964681][ T5087] ntfs3: loop0: Mark volume as dirty due to NTFS errors [ 78.001593][ T5087] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 78.009440][ T5087] #PF: supervisor instruction fetch in kernel mode [ 78.015944][ T5087] #PF: error_code(0x0010) - not-present page [ 78.021927][ T5087] PGD 8000000067a53067 P4D 8000000067a53067 PUD 67914067 PMD 0 [ 78.029589][ T5087] Oops: Oops: 0010 [#1] PREEMPT SMP KASAN PTI [ 78.035667][ T5087] CPU: 0 PID: 5087 Comm: syz-executor191 Not tainted 6.10.0-rc6-syzkaller-00212-g1dd28064d416 #0 [ 78.046209][ T5087] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 [ 78.056297][ T5087] RIP: 0010:0x0 [ 78.059796][ T5087] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 78.067189][ T5087] RSP: 0018:ffffc900033cf698 EFLAGS: 00010282 [ 78.073261][ T5087] RAX: 1ffffffff17f8f43 RBX: 0000000000000000 RCX: dffffc0000000000 [ 78.081258][ T5087] RDX: 0000000000000000 RSI: ffffea0001de8640 RDI: ffff888077d9b0b8 [ 78.089253][ T5087] RBP: ffffc900033cf800 R08: ffffffff81cfb65a R09: 1ffffd40003bd0c8 [ 78.097224][ T5087] R10: dffffc0000000000 R11: 0000000000000000 R12: ffff888023357148 [ 78.105194][ T5087] R13: ffff888023357160 R14: ffffea0001de8640 R15: 1ffff92000679ee8 [ 78.113205][ T5087] FS: 00005555952d5380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 [ 78.122155][ T5087] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.128739][ T5087] CR2: ffffffffffffffd6 CR3: 0000000067aca000 CR4: 00000000003506f0 [ 78.136815][ T5087] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.144895][ T5087] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.152871][ T5087] Call Trace: [ 78.158753][ T5087] [ 78.161698][ T5087] ? __die_body+0x88/0xe0 [ 78.166045][ T5087] ? page_fault_oops+0x8e4/0xcc0 [ 78.171430][ T5087] ? __pfx_page_fault_oops+0x10/0x10 [ 78.177089][ T5087] ? folio_batch_add_and_move+0x165/0x2b0 [ 78.183014][ T5087] ? __pfx_lru_add_fn+0x10/0x10 [ 78.187873][ T5087] ? folio_add_lru+0x27b/0x9e0 [ 78.192654][ T5087] ? rcu_is_watching+0x15/0xb0 [ 78.197426][ T5087] ? is_errata93+0xbe/0x260 [ 78.201932][ T5087] ? exc_page_fault+0x5ed/0x8c0 [ 78.206798][ T5087] ? asm_exc_page_fault+0x26/0x30 [ 78.211829][ T5087] ? folio_mark_dirty+0xba/0x370 [ 78.216766][ T5087] attr_make_nonresident+0xa49/0xe80 [ 78.222058][ T5087] ? __pfx_attr_make_nonresident+0x10/0x10 [ 78.227857][ T5087] ? __pfx_ni_find_attr+0x10/0x10 [ 78.232879][ T5087] attr_set_size+0x711/0x4290 [ 78.237750][ T5087] ? __lock_acquire+0x1346/0x1fd0 [ 78.242775][ T5087] ? __pfx_attr_set_size+0x10/0x10 [ 78.247897][ T5087] ? __pfx_lock_acquire+0x10/0x10 [ 78.252933][ T5087] ? __down_write_common+0x162/0x200 [ 78.258219][ T5087] ? __pfx___down_write_common+0x10/0x10 [ 78.263850][ T5087] ? current_time+0x203/0x2b0 [ 78.268526][ T5087] ntfs_set_size+0x161/0x200 [ 78.273136][ T5087] ntfs_extend+0x16d/0x4a0 [ 78.277578][ T5087] ntfs_file_write_iter+0x3ea/0x770 [ 78.282873][ T5087] vfs_write+0xa72/0xc90 [ 78.287141][ T5087] ? __pfx_ntfs_file_write_iter+0x10/0x10 [ 78.292859][ T5087] ? __pfx_vfs_write+0x10/0x10 [ 78.297635][ T5087] ? lockdep_hardirqs_on+0x99/0x150 [ 78.302839][ T5087] ksys_write+0x1a0/0x2c0 [ 78.307174][ T5087] ? __pfx_ksys_write+0x10/0x10 [ 78.312026][ T5087] ? do_syscall_64+0x100/0x230 [ 78.316880][ T5087] do_syscall_64+0xf3/0x230 [ 78.321476][ T5087] ? clear_bhb_loop+0x35/0x90 [ 78.326249][ T5087] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 78.332141][ T5087] RIP: 0033:0x7f455cb7fad9 [ 78.336554][ T5087] 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 [ 78.356166][ T5087] RSP: 002b:00007ffd6552c128 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 78.364577][ T5087] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f455cb7fad9 [ 78.372562][ T5087] RDX: 00000000175d9003 RSI: 0000000020000200 RDI: 0000000000000004 [ 78.380809][ T5087] RBP: 00007f455cc125f0 R08: 00005555952d64c0 R09: 00005555952d64c0 [ 78.388801][ T5087] R10: 00005555952d64c0 R11: 0000000000000246 R12: 00007ffd6552c150 [ 78.396774][ T5087] R13: 00007ffd6552c378 R14: 431bde82d7b634db R15: 00007f455cbc803b [ 78.404749][ T5087] [ 78.407763][ T5087] Modules linked in: [ 78.411661][ T5087] CR2: 0000000000000000 [ 78.415805][ T5087] ---[ end trace 0000000000000000 ]--- [ 78.421250][ T5087] RIP: 0010:0x0 [ 78.424708][ T5087] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 78.432062][ T5087] RSP: 0018:ffffc900033cf698 EFLAGS: 00010282 [ 78.438118][ T5087] RAX: 1ffffffff17f8f43 RBX: 0000000000000000 RCX: dffffc0000000000 [ 78.446080][ T5087] RDX: 0000000000000000 RSI: ffffea0001de8640 RDI: ffff888077d9b0b8 [ 78.454043][ T5087] RBP: ffffc900033cf800 R08: ffffffff81cfb65a R09: 1ffffd40003bd0c8 [ 78.462010][ T5087] R10: dffffc0000000000 R11: 0000000000000000 R12: ffff888023357148 [ 78.469979][ T5087] R13: ffff888023357160 R14: ffffea0001de8640 R15: 1ffff92000679ee8 [ 78.477947][ T5087] FS: 00005555952d5380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 [ 78.486868][ T5087] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.493442][ T5087] CR2: ffffffffffffffd6 CR3: 0000000067aca000 CR4: 00000000003506f0 [ 78.501405][ T5087] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.509368][ T5087] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.517332][ T5087] Kernel panic - not syncing: Fatal exception [ 78.523559][ T5087] Kernel Offset: disabled [ 78.527879][ T5087] Rebooting in 86400 seconds..