./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3327238105 <...> Warning: Permanently added '10.128.1.226' (ED25519) to the list of known hosts. execve("./syz-executor3327238105", ["./syz-executor3327238105"], 0x7fffec254f80 /* 10 vars */) = 0 brk(NULL) = 0x5555784eb000 brk(0x5555784ebd00) = 0x5555784ebd00 arch_prctl(ARCH_SET_FS, 0x5555784eb380) = 0 set_tid_address(0x5555784eb650) = 5183 set_robust_list(0x5555784eb660, 24) = 0 rseq(0x5555784ebca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3327238105", 4096) = 28 getrandom("\xc7\xca\xfc\x6e\x50\x84\x59\x41", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555784ebd00 brk(0x55557850cd00) = 0x55557850cd00 brk(0x55557850d000) = 0x55557850d000 mprotect(0x7fa524164000, 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=0x5555784eb650) = 5184 ./strace-static-x86_64: Process 5184 attached [pid 5184] set_robust_list(0x5555784eb660, 24) = 0 [pid 5184] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5184] setpgid(0, 0) = 0 [pid 5184] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5184] write(3, "1000", 4) = 4 [pid 5184] close(3executing program ) = 0 [pid 5184] write(1, "executing program\n", 18) = 18 [pid 5184] memfd_create("syzkaller", 0) = 3 [pid 5184] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa51bc00000 [pid 5184] write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 [pid 5184] munmap(0x7fa51bc00000, 138412032) = 0 [pid 5184] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5184] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5184] close(3) = 0 [pid 5184] close(4) = 0 [pid 5184] mkdir("./file1", 0777) = 0 [ 190.752974][ T5184] loop0: detected capacity change from 0 to 32768 [ 190.777979][ T5184] ======================================================= [ 190.777979][ T5184] WARNING: The mand mount option has been deprecated and [ 190.777979][ T5184] and is ignored by this kernel. Remove the mand [ 190.777979][ T5184] option from the mount to silence this warning. [ 190.777979][ T5184] ======================================================= [pid 5184] mount("/dev/loop0", "./file1", "ocfs2", MS_MANDLOCK|MS_DIRSYNC|MS_I_VERSION, "acl,nointr,atime_quantum=00000000000000000007,localflocks,localalloc=00000000000000000003,localflock"...) = 0 [pid 5184] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5184] chdir("./file1") = 0 [pid 5184] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5184] openat(AT_FDCWD, "cpu.stat", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 4 [ 190.852441][ T5184] ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. [pid 5184] io_uring_setup(479, {flags=IORING_SETUP_COOP_TASKRUN|0x10000, sq_thread_cpu=0, sq_thread_idle=0, sq_entries=512, cq_entries=1024, features=IORING_FEAT_SINGLE_MMAP|IORING_FEAT_NODROP|IORING_FEAT_SUBMIT_STABLE|IORING_FEAT_RW_CUR_POS|IORING_FEAT_CUR_PERSONALITY|IORING_FEAT_FAST_POLL|IORING_FEAT_POLL_32BITS|IORING_FEAT_SQPOLL_NONFIXED|IORING_FEAT_EXT_ARG|IORING_FEAT_NATIVE_WORKERS|IORING_FEAT_RSRC_TAGS|IORING_FEAT_CQE_SKIP|IORING_FEAT_LINKED_FILE|0xe000, sq_off={head=0, tail=4, ring_mask=16, ring_entries=24, flags=36, dropped=32, array=0}, cq_off={head=8, tail=12, ring_mask=20, ring_entries=28, overflow=44, cqes=64, flags=40}}) = 5 [pid 5184] mmap(NULL, 16448, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 5, 0) = 0x7fa5240a3000 [pid 5184] mmap(NULL, 32768, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 5, 0x10000000) = 0x7fa52409b000 [pid 5184] io_uring_enter(5, 1383, 0, 0, NULL, 0) = 1 [pid 5184] exit_group(0) = ? [ 190.917828][ T5188] ===================================================== [ 190.925615][ T5188] BUG: KMSAN: uninit-value in ocfs2_file_read_iter+0x9a4/0xf80 [ 190.934553][ T5188] ocfs2_file_read_iter+0x9a4/0xf80 [ 190.939973][ T5188] __io_read+0x8d2/0x20f0 [ 190.944705][ T5188] io_read+0x3e/0xf0 [ 190.948796][ T5188] io_issue_sqe+0x429/0x22c0 [ 190.953763][ T5188] io_wq_submit_work+0xaf9/0xdc0 [ 190.958919][ T5188] io_worker_handle_work+0xd11/0x2110 [ 190.964709][ T5188] io_wq_worker+0x447/0x1410 [ 190.969521][ T5188] ret_from_fork+0x6d/0x90 [ 190.974290][ T5188] ret_from_fork_asm+0x1a/0x30 [ 190.979291][ T5188] [ 190.981887][ T5188] Uninit was created at: [ 190.986338][ T5188] __alloc_pages_noprof+0x9a7/0xe00 [ 190.991780][ T5188] alloc_pages_mpol_noprof+0x299/0x990 [ 190.997378][ T5188] alloc_pages_noprof+0x1bf/0x1e0 [ 191.002746][ T5188] allocate_slab+0x33a/0x1250 [ 191.007615][ T5188] ___slab_alloc+0x12ef/0x35e0 [ 191.012777][ T5188] kmem_cache_alloc_bulk_noprof+0x486/0x1330 [ 191.018939][ T5188] __io_alloc_req_refill+0x84/0x560 [ 191.024484][ T5188] io_submit_sqes+0x172f/0x2f30 [ 191.029560][ T5188] __se_sys_io_uring_enter+0x406/0x41c0 [ 191.035597][ T5188] __x64_sys_io_uring_enter+0x11f/0x1a0 [ 191.041531][ T5188] x64_sys_call+0x2b54/0x3ba0 [ 191.046371][ T5188] do_syscall_64+0xcd/0x1e0 [ 191.051028][ T5188] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 191.057405][ T5188] [ 191.059852][ T5188] CPU: 0 UID: 0 PID: 5188 Comm: iou-wrk-5184 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0 [ 191.071266][ T5188] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 191.081691][ T5188] ===================================================== [ 191.088748][ T5188] Disabling lock debugging due to kernel taint [ 191.097168][ T5188] Kernel panic - not syncing: kmsan.panic set ... [ 191.103755][ T5188] CPU: 0 UID: 0 PID: 5188 Comm: iou-wrk-5184 Tainted: G B 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0 [ 191.116303][ T5188] Tainted: [B]=BAD_PAGE [ 191.120565][ T5188] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 191.130785][ T5188] Call Trace: [ 191.134163][ T5188] [ 191.137176][ T5188] dump_stack_lvl+0x216/0x2d0 [ 191.142026][ T5188] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 191.148038][ T5188] dump_stack+0x1e/0x30 [ 191.152382][ T5188] panic+0x4e2/0xcf0 [ 191.156529][ T5188] ? kmsan_get_metadata+0x131/0x1c0 [ 191.161941][ T5188] kmsan_report+0x2c7/0x2d0 [ 191.166653][ T5188] ? kmsan_internal_unpoison_memory+0x14/0x20 [ 191.172957][ T5188] ? __msan_warning+0x95/0x120 [ 191.177877][ T5188] ? ocfs2_file_read_iter+0x9a4/0xf80 [ 191.183426][ T5188] ? __io_read+0x8d2/0x20f0 [ 191.188072][ T5188] ? io_read+0x3e/0xf0 [ 191.192274][ T5188] ? io_issue_sqe+0x429/0x22c0 [ 191.197185][ T5188] ? io_wq_submit_work+0xaf9/0xdc0 [ 191.202472][ T5188] ? io_worker_handle_work+0xd11/0x2110 [ 191.208249][ T5188] ? io_wq_worker+0x447/0x1410 [ 191.213170][ T5188] ? ret_from_fork+0x6d/0x90 [ 191.217961][ T5188] ? ret_from_fork_asm+0x1a/0x30 [ 191.223111][ T5188] ? generic_file_read_iter+0x136/0xad0 [ 191.228854][ T5188] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 191.234857][ T5188] ? kmsan_get_metadata+0x13e/0x1c0 [ 191.240230][ T5188] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 191.246220][ T5188] __msan_warning+0x95/0x120 [ 191.250969][ T5188] ocfs2_file_read_iter+0x9a4/0xf80 [ 191.256346][ T5188] ? __pfx_ocfs2_file_read_iter+0x10/0x10 [ 191.262217][ T5188] __io_read+0x8d2/0x20f0 [ 191.266718][ T5188] ? kmsan_internal_set_shadow_origin+0x69/0x100 [ 191.273206][ T5188] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 191.279187][ T5188] io_read+0x3e/0xf0 [ 191.283254][ T5188] ? __pfx_io_read+0x10/0x10 [ 191.288086][ T5188] io_issue_sqe+0x429/0x22c0 [ 191.292815][ T5188] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 191.298838][ T5188] io_wq_submit_work+0xaf9/0xdc0 [ 191.303948][ T5188] ? __pfx_io_wq_submit_work+0x10/0x10 [ 191.309571][ T5188] io_worker_handle_work+0xd11/0x2110 [ 191.315096][ T5188] ? kmsan_get_metadata+0x13e/0x1c0 [ 191.320501][ T5188] io_wq_worker+0x447/0x1410 [ 191.325268][ T5188] ? __pfx_io_wq_worker+0x10/0x10 [ 191.330460][ T5188] ? schedule_tail+0x11f/0x190 [ 191.335463][ T5188] ? __pfx_io_wq_worker+0x10/0x10 [ 191.340650][ T5188] ret_from_fork+0x6d/0x90 [ 191.345264][ T5188] ? __pfx_io_wq_worker+0x10/0x10 [ 191.350425][ T5188] ret_from_fork_asm+0x1a/0x30 [ 191.355365][ T5188] RIP: 0033:0x0 [ 191.358932][ T5188] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 191.366391][ T5188] RSP: 002b:0000000000000000 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa [ 191.374949][ T5188] RAX: 0000000000000000 RBX: 00000000000001df RCX: 00007fa5240ecc99 [ 191.383033][ T5188] RDX: 0000000000000000 RSI: 0000000000000567 RDI: 0000000000000005 [ 191.391130][ T5188] RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000 [ 191.399256][ T5188] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5e6c5010 [ 191.407387][ T5188] R13: 00007ffc5e6c5238 R14: 431bde82d7b634db R15: 00007fa52413503b [ 191.415497][ T5188] [ 191.419059][ T5188] Kernel Offset: disabled [ 191.423479][ T5188] Rebooting in 86400 seconds..