./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor252559529 <...> Warning: Permanently added '10.128.1.49' (ED25519) to the list of known hosts. execve("./syz-executor252559529", ["./syz-executor252559529"], 0x7fff1e74a7f0 /* 10 vars */) = 0 brk(NULL) = 0x555555deb000 brk(0x555555debd00) = 0x555555debd00 arch_prctl(ARCH_SET_FS, 0x555555deb380) = 0 set_tid_address(0x555555deb650) = 5048 set_robust_list(0x555555deb660, 24) = 0 rseq(0x555555debca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor252559529", 4096) = 27 getrandom("\x3b\x2e\xf9\xd5\xb4\x0b\xde\xc2", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555debd00 brk(0x555555e0cd00) = 0x555555e0cd00 brk(0x555555e0d000) = 0x555555e0d000 mprotect(0x7f7d42165000, 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, child_tidptr=0x555555deb650) = 5049 ./strace-static-x86_64: Process 5049 attached [pid 5049] set_robust_list(0x555555deb660, 24) = 0 [pid 5049] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 executing program [pid 5049] setpgid(0, 0) = 0 [pid 5049] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5049] write(3, "1000", 4) = 4 [pid 5049] close(3) = 0 [pid 5049] write(1, "executing program\n", 18) = 18 [pid 5049] memfd_create("syzkaller", 0) = 3 [pid 5049] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7d39c00000 [pid 5049] 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 5049] munmap(0x7f7d39c00000, 138412032) = 0 [pid 5049] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5049] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5049] close(3) = 0 [pid 5049] close(4) = 0 [pid 5049] mkdir("./file0", 0777) = 0 [ 162.063949][ T5049] loop0: detected capacity change from 0 to 4096 [ 162.085786][ T5049] ntfs3: loop0: Different NTFS sector size (2048) and media sector size (512). [ 162.119052][ T5049] ntfs3: loop0: Mark volume as dirty due to NTFS errors [pid 5049] mount("/dev/loop0", "./file0", "ntfs3", 0, "") = 0 [pid 5049] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5049] chdir("./file0") = 0 [pid 5049] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5049] creat("./bus", 000) = 4 [ 162.168412][ T5049] ntfs3: loop0: Failed to load $Extend (-22). [ 162.174785][ T5049] ntfs3: loop0: Failed to initialize $Extend. [ 162.199676][ T5049] ===================================================== [ 162.208180][ T5049] BUG: KMSAN: uninit-value in longest_match_std+0x5d9/0xe00 [ 162.215709][ T5049] longest_match_std+0x5d9/0xe00 [ 162.220875][ T5049] compress_lznt+0x41f/0xef0 [ 162.225542][ T5049] ni_write_frame+0xf8f/0x1c80 [ 162.230583][ T5049] ntfs_compress_write+0x25ce/0x3c80 [ 162.236014][ T5049] ntfs_file_write_iter+0xa30/0xec0 [ 162.241500][ T5049] vfs_write+0xb2f/0x1550 [ 162.245992][ T5049] __x64_sys_pwrite64+0x2c5/0x3b0 [ 162.251246][ T5049] x64_sys_call+0xc26/0x3c10 [ 162.256015][ T5049] do_syscall_64+0xcd/0x1e0 [ 162.260783][ T5049] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 162.266880][ T5049] [ 162.269254][ T5049] Uninit was created at: [ 162.273829][ T5049] __alloc_pages_noprof+0x9d6/0xe70 [ 162.279217][ T5049] alloc_pages_mpol_noprof+0x299/0x990 [ 162.284915][ T5049] folio_alloc_noprof+0x1db/0x310 [ 162.290091][ T5049] filemap_alloc_folio_noprof+0xa6/0x440 [ 162.295943][ T5049] __filemap_get_folio+0xa05/0x14b0 [ 162.301401][ T5049] pagecache_get_page+0x4a/0x1a0 [ 162.306422][ T5049] ntfs_get_frame_pages+0xdc/0xa00 [ 162.311737][ T5049] ntfs_compress_write+0x1bdc/0x3c80 [ 162.317171][ T5049] ntfs_file_write_iter+0xa30/0xec0 [ 162.322600][ T5049] vfs_write+0xb2f/0x1550 [ 162.327089][ T5049] __x64_sys_pwrite64+0x2c5/0x3b0 [ 162.332386][ T5049] x64_sys_call+0xc26/0x3c10 [ 162.337138][ T5049] do_syscall_64+0xcd/0x1e0 [ 162.341885][ T5049] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 162.347995][ T5049] [ 162.350504][ T5049] CPU: 0 PID: 5049 Comm: syz-executor252 Not tainted 6.10.0-syzkaller-11185-g2c9b3512402e #0 [ 162.360895][ T5049] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 [ 162.371136][ T5049] ===================================================== [ 162.378159][ T5049] Disabling lock debugging due to kernel taint [ 162.384499][ T5049] Kernel panic - not syncing: kmsan.panic set ... [ 162.391003][ T5049] CPU: 0 PID: 5049 Comm: syz-executor252 Tainted: G B 6.10.0-syzkaller-11185-g2c9b3512402e #0 [ 162.402730][ T5049] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 [ 162.412885][ T5049] Call Trace: [ 162.416242][ T5049] [ 162.419222][ T5049] dump_stack_lvl+0x216/0x2d0 [ 162.424045][ T5049] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 162.430057][ T5049] dump_stack+0x1e/0x30 [ 162.434322][ T5049] panic+0x4e2/0xcd0 [ 162.438372][ T5049] ? kmsan_get_metadata+0xf1/0x1d0 [ 162.443613][ T5049] kmsan_report+0x2d5/0x2e0 [ 162.448239][ T5049] ? kmsan_get_metadata+0x141/0x1d0 [ 162.453554][ T5049] ? __msan_warning+0x95/0x120 [ 162.458425][ T5049] ? longest_match_std+0x5d9/0xe00 [ 162.463620][ T5049] ? compress_lznt+0x41f/0xef0 [ 162.468479][ T5049] ? ni_write_frame+0xf8f/0x1c80 [ 162.473547][ T5049] ? ntfs_compress_write+0x25ce/0x3c80 [ 162.479101][ T5049] ? ntfs_file_write_iter+0xa30/0xec0 [ 162.484614][ T5049] ? vfs_write+0xb2f/0x1550 [ 162.489215][ T5049] ? __x64_sys_pwrite64+0x2c5/0x3b0 [ 162.494521][ T5049] ? x64_sys_call+0xc26/0x3c10 [ 162.499388][ T5049] ? do_syscall_64+0xcd/0x1e0 [ 162.504175][ T5049] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 162.510381][ T5049] ? kmsan_get_shadow_origin_ptr+0x38/0xb0 [ 162.516320][ T5049] ? prep_new_page+0x35e/0x540 [ 162.521204][ T5049] ? get_page_from_freelist+0x1592/0x1610 [ 162.527052][ T5049] ? kmsan_get_metadata+0x146/0x1d0 [ 162.532369][ T5049] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 162.538300][ T5049] ? ___kmalloc_large_node+0x194/0x370 [ 162.543890][ T5049] ? kmsan_get_metadata+0x146/0x1d0 [ 162.549219][ T5049] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 162.555151][ T5049] __msan_warning+0x95/0x120 [ 162.559851][ T5049] longest_match_std+0x5d9/0xe00 [ 162.564872][ T5049] ? kmsan_metadata_is_contiguous+0xde/0x1e0 [ 162.570968][ T5049] ? kmsan_get_metadata+0x146/0x1d0 [ 162.576288][ T5049] ? kmsan_metadata_is_contiguous+0xde/0x1e0 [ 162.582382][ T5049] ? kmsan_get_metadata+0x146/0x1d0 [ 162.587696][ T5049] ? kmsan_internal_set_shadow_origin+0x69/0x100 [ 162.594151][ T5049] compress_lznt+0x41f/0xef0 [ 162.598822][ T5049] ? __pfx_longest_match_std+0x10/0x10 [ 162.604384][ T5049] ni_write_frame+0xf8f/0x1c80 [ 162.609234][ T5049] ? kmsan_get_metadata+0x146/0x1d0 [ 162.614599][ T5049] ntfs_compress_write+0x25ce/0x3c80 [ 162.620077][ T5049] ntfs_file_write_iter+0xa30/0xec0 [ 162.625407][ T5049] vfs_write+0xb2f/0x1550 [ 162.629908][ T5049] ? uprobe_notify_resume+0x52b0/0x5330 [ 162.635552][ T5049] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 162.641486][ T5049] ? __pfx_ntfs_file_write_iter+0x10/0x10 [ 162.647330][ T5049] __x64_sys_pwrite64+0x2c5/0x3b0 [ 162.652547][ T5049] x64_sys_call+0xc26/0x3c10 [ 162.657244][ T5049] do_syscall_64+0xcd/0x1e0 [ 162.661855][ T5049] ? clear_bhb_loop+0x25/0x80 [ 162.666621][ T5049] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 162.672643][ T5049] RIP: 0033:0x7f7d420d2a99 [ 162.677131][ T5049] 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 [ 162.696935][ T5049] RSP: 002b:00007ffc648c3258 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 [ 162.705447][ T5049] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7d420d2a99 [ 162.713492][ T5049] RDX: 0000000000000001 RSI: 0000000020000100 RDI: 0000000000000004 [ 162.721554][ T5049] RBP: 00007f7d421655f0 R08: 0000555555dec4c0 R09: 0000555555dec4c0 [ 162.729601][ T5049] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc648c3280 [ 162.737664][ T5049] R13: 00007ffc648c34a8 R14: 431bde82d7b634db R15: 00007f7d4211b03b [ 162.745778][ T5049] [ 162.749090][ T5049] Kernel Offset: disabled [ 162.753468][ T5049] Rebooting in 86400 seconds..