./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3527313475 <...> Warning: Permanently added '10.128.0.191' (ED25519) to the list of known hosts. execve("./syz-executor3527313475", ["./syz-executor3527313475"], 0x7ffcf8f63900 /* 10 vars */) = 0 brk(NULL) = 0x555555b06000 brk(0x555555b06d00) = 0x555555b06d00 arch_prctl(ARCH_SET_FS, 0x555555b06380) = 0 set_tid_address(0x555555b06650) = 4987 set_robust_list(0x555555b06660, 24) = 0 rseq(0x555555b06ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3527313475", 4096) = 28 getrandom("\xa6\x8b\x45\x49\xa0\x4e\x39\xd7", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555b06d00 brk(0x555555b27d00) = 0x555555b27d00 brk(0x555555b28000) = 0x555555b28000 mprotect(0x7fc3cc927000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555b06650) = 4988 ./strace-static-x86_64: Process 4988 attached [pid 4988] set_robust_list(0x555555b06660, 24) = 0 [pid 4988] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 4988] setpgid(0, 0) = 0 [pid 4988] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 4988] write(3, "1000", 4) = 4 [pid 4988] close(3) = 0 [pid 4988] io_uring_setup(9466, {flags=IORING_SETUP_COOP_TASKRUN|0x10000, sq_thread_cpu=0, sq_thread_idle=0, sq_entries=16384, cq_entries=32768, 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|0x2000, 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}}) = 3 [pid 4988] mmap(NULL, 524352, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 3, 0) = 0x7fc3cc7f9000 [pid 4988] mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 3, 0x10000000) = 0x7fc3cc6f9000 [ 163.280833][ T4988] ===================================================== [ 163.288826][ T4988] BUG: KMSAN: uninit-value in io_rw_fail+0x1a7/0x1b0 [ 163.295874][ T4988] io_rw_fail+0x1a7/0x1b0 [ 163.300415][ T4988] io_req_defer_failed+0x217/0x3e0 [ 163.305820][ T4988] io_queue_sqe_fallback+0x1f4/0x260 [ 163.311318][ T4988] io_submit_sqes+0x2b83/0x2ff0 [ 163.316428][ T4988] __se_sys_io_uring_enter+0x491/0x43f0 [ 163.322189][ T4988] __x64_sys_io_uring_enter+0x11b/0x1a0 [ 163.328093][ T4988] do_syscall_64+0x41/0xc0 [ 163.332742][ T4988] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 163.339056][ T4988] [ 163.341486][ T4988] Uninit was created at: [ 163.346132][ T4988] slab_post_alloc_hook+0x12f/0xb70 [ 163.351561][ T4988] __kmem_cache_alloc_node+0x536/0x8d0 [ 163.357388][ T4988] __kmalloc+0x121/0x3c0 [ 163.361853][ T4988] io_req_prep_async+0x384/0x5a0 [ 163.367190][ T4988] io_queue_sqe_fallback+0x95/0x260 [ 163.372605][ T4988] io_submit_sqes+0x2b83/0x2ff0 [ 163.377721][ T4988] __se_sys_io_uring_enter+0x491/0x43f0 [ 163.383482][ T4988] __x64_sys_io_uring_enter+0x11b/0x1a0 [ 163.389401][ T4988] do_syscall_64+0x41/0xc0 [ 163.394039][ T4988] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 163.400357][ T4988] [ 163.402795][ T4988] CPU: 0 PID: 4988 Comm: syz-executor352 Not tainted 6.5.0-syzkaller-09276-g99d99825fc07 #0 [ 163.413257][ T4988] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 [ 163.423525][ T4988] ===================================================== [ 163.430745][ T4988] Disabling lock debugging due to kernel taint [ 163.437105][ T4988] Kernel panic - not syncing: kmsan.panic set ... [ 163.443633][ T4988] CPU: 0 PID: 4988 Comm: syz-executor352 Tainted: G B 6.5.0-syzkaller-09276-g99d99825fc07 #0 [ 163.455303][ T4988] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 [ 163.465619][ T4988] Call Trace: [ 163.469025][ T4988] [ 163.472053][ T4988] dump_stack_lvl+0x1bf/0x240 [ 163.476896][ T4988] dump_stack+0x1e/0x20 [ 163.481194][ T4988] panic+0x4d5/0xc70 [ 163.485615][ T4988] ? add_taint+0x108/0x1a0 [ 163.490253][ T4988] kmsan_report+0x2d0/0x2d0 [ 163.494977][ T4988] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 163.500986][ T4988] ? __msan_warning+0x96/0x110 [ 163.505876][ T4988] ? io_rw_fail+0x1a7/0x1b0 [ 163.510526][ T4988] ? io_req_defer_failed+0x217/0x3e0 [ 163.515983][ T4988] ? io_queue_sqe_fallback+0x1f4/0x260 [ 163.521667][ T4988] ? io_submit_sqes+0x2b83/0x2ff0 [ 163.526833][ T4988] ? __se_sys_io_uring_enter+0x491/0x43f0 [ 163.532728][ T4988] ? __x64_sys_io_uring_enter+0x11b/0x1a0 [ 163.538676][ T4988] ? do_syscall_64+0x41/0xc0 [ 163.543416][ T4988] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 163.549686][ T4988] ? xa_load+0x19e/0x1c0 [ 163.554196][ T4988] ? io_buffer_select+0xe9c/0xfc0 [ 163.559480][ T4988] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 163.565584][ T4988] ? io_import_iovec+0x5f8/0x950 [ 163.570744][ T4988] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 163.576817][ T4988] __msan_warning+0x96/0x110 [ 163.581616][ T4988] io_rw_fail+0x1a7/0x1b0 [ 163.586195][ T4988] ? loop_rw_iter+0xa80/0xa80 [ 163.591123][ T4988] io_req_defer_failed+0x217/0x3e0 [ 163.596500][ T4988] io_queue_sqe_fallback+0x1f4/0x260 [ 163.601973][ T4988] io_submit_sqes+0x2b83/0x2ff0 [ 163.607006][ T4988] __se_sys_io_uring_enter+0x491/0x43f0 [ 163.612778][ T4988] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 163.618810][ T4988] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 163.624846][ T4988] __x64_sys_io_uring_enter+0x11b/0x1a0 [ 163.630629][ T4988] do_syscall_64+0x41/0xc0 [ 163.635205][ T4988] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 163.641302][ T4988] RIP: 0033:0x7fc3cc8b4b79 [ 163.645881][ T4988] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 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 [ 163.666041][ T4988] RSP: 002b:00007ffed14d70e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa [ 163.674613][ T4988] RAX: ffffffffffffffda RBX: 00000000000024fa RCX: 00007fc3cc8b4b79 [ 163.682783][ T4988] RDX: 0000000000000000 RSI: 0000000000002d3e RDI: 0000000000000003 [ 163.691264][ T4988] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 163.699331][ T4988] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 163.707430][ T4988] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 163.715566][ T4988] [ 163.718987][ T4988] Kernel Offset: disabled [ 163.723401][ T4988] Rebooting in 86400 seconds..