./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2016669267 <...> Warning: Permanently added '10.128.0.205' (ED25519) to the list of known hosts. execve("./syz-executor2016669267", ["./syz-executor2016669267"], 0x7ffdd43828b0 /* 10 vars */) = 0 brk(NULL) = 0x555556948000 brk(0x555556948e00) = 0x555556948e00 arch_prctl(ARCH_SET_FS, 0x555556948480) = 0 set_tid_address(0x555556948750) = 4985 set_robust_list(0x555556948760, 24) = 0 rseq(0x555556948da0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2016669267", 4096) = 28 getrandom("\xfb\x5a\x2a\x6b\xa1\xdf\x34\x49", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556948e00 brk(0x555556969e00) = 0x555556969e00 brk(0x55555696a000) = 0x55555696a000 mprotect(0x7fb8ad69f000, 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 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7fb8ad5f88e0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fb8ad600ad0}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7fb8ad5f88e0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fb8ad600ad0}, NULL, 8) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 4986 attached , child_tidptr=0x555556948750) = 4986 [pid 4986] set_robust_list(0x555556948760, 24) = 0 [pid 4986] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 4986] setpgid(0, 0) = 0 [pid 4986] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 4986] write(3, "1000", 4) = 4 [pid 4986] close(3) = 0 [pid 4986] io_uring_setup(3840, {flags=0, sq_thread_cpu=0, sq_thread_idle=0, sq_entries=4096, cq_entries=8192, 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=64, ring_mask=256, ring_entries=264, flags=276, dropped=272, array=131392}, cq_off={head=128, tail=192, ring_mask=260, ring_entries=268, overflow=284, cqes=320, flags=280}}) = 3 [pid 4986] mmap(NULL, 147776, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 3, 0) = 0x7fb8ad5ca000 [pid 4986] mmap(NULL, 262144, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 3, 0x10000000) = 0x7fb8ad58a000 [pid 4986] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x100} --- [ 169.576810][ T4986] ===================================================== [ 169.584114][ T4986] BUG: KMSAN: uninit-value in io_rw_fail+0x1a7/0x1b0 [ 169.591019][ T4986] io_rw_fail+0x1a7/0x1b0 [ 169.595829][ T4986] io_req_defer_failed+0x217/0x3e0 [ 169.601162][ T4986] io_queue_sqe_fallback+0x1f4/0x260 [ 169.606905][ T4986] io_submit_sqes+0x2ac6/0x2dc0 [ 169.611899][ T4986] __se_sys_io_uring_enter+0x49b/0x4250 [ 169.617726][ T4986] __x64_sys_io_uring_enter+0x11b/0x1a0 [ 169.623562][ T4986] do_syscall_64+0x41/0xc0 [ 169.628241][ T4986] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 169.634521][ T4986] [ 169.636956][ T4986] Uninit was created at: [ 169.641503][ T4986] slab_post_alloc_hook+0x12f/0xb70 [ 169.647037][ T4986] __kmem_cache_alloc_node+0x536/0x8d0 [ 169.652700][ T4986] __kmalloc+0x121/0x3c0 [ 169.657174][ T4986] io_req_prep_async+0x384/0x5a0 [ 169.662285][ T4986] io_queue_sqe_fallback+0x95/0x260 [ 169.667804][ T4986] io_submit_sqes+0x2ac6/0x2dc0 [ 169.673178][ T4986] __se_sys_io_uring_enter+0x49b/0x4250 [ 169.678936][ T4986] __x64_sys_io_uring_enter+0x11b/0x1a0 [ 169.684855][ T4986] do_syscall_64+0x41/0xc0 [ 169.689520][ T4986] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 169.695888][ T4986] [ 169.698293][ T4986] CPU: 1 PID: 4986 Comm: syz-executor201 Not tainted 6.5.0-rc4-syzkaller #0 [ 169.707218][ T4986] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 [ 169.717491][ T4986] ===================================================== [ 169.724670][ T4986] Disabling lock debugging due to kernel taint [ 169.730956][ T4986] Kernel panic - not syncing: kmsan.panic set ... [ 169.737508][ T4986] CPU: 1 PID: 4986 Comm: syz-executor201 Tainted: G B 6.5.0-rc4-syzkaller #0 [ 169.747874][ T4986] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 [ 169.758078][ T4986] Call Trace: [ 169.761456][ T4986] [ 169.764488][ T4986] dump_stack_lvl+0x1bf/0x240 [ 169.769376][ T4986] dump_stack+0x1e/0x20 [ 169.773762][ T4986] panic+0x4d5/0xc70 [ 169.777902][ T4986] ? add_taint+0x108/0x1a0 [ 169.782538][ T4986] kmsan_report+0x2d0/0x2d0 [ 169.787325][ T4986] ? kfree+0x173/0x430 [ 169.791602][ T4986] ? iovec_from_user+0x431/0x560 [ 169.796800][ T4986] ? __msan_warning+0x96/0x110 [ 169.801752][ T4986] ? io_rw_fail+0x1a7/0x1b0 [ 169.806398][ T4986] ? io_req_defer_failed+0x217/0x3e0 [ 169.811870][ T4986] ? io_queue_sqe_fallback+0x1f4/0x260 [ 169.817812][ T4986] ? io_submit_sqes+0x2ac6/0x2dc0 [ 169.823033][ T4986] ? __se_sys_io_uring_enter+0x49b/0x4250 [ 169.828965][ T4986] ? __x64_sys_io_uring_enter+0x11b/0x1a0 [ 169.834899][ T4986] ? do_syscall_64+0x41/0xc0 [ 169.839720][ T4986] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 169.846044][ T4986] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 169.852127][ T4986] ? __import_iovec+0x2c6/0xec0 [ 169.857254][ T4986] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 169.863346][ T4986] ? io_import_iovec+0x75f/0x950 [ 169.868506][ T4986] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 169.874547][ T4986] __msan_warning+0x96/0x110 [ 169.879361][ T4986] io_rw_fail+0x1a7/0x1b0 [ 169.883845][ T4986] ? loop_rw_iter+0xa80/0xa80 [ 169.888719][ T4986] io_req_defer_failed+0x217/0x3e0 [ 169.894030][ T4986] io_queue_sqe_fallback+0x1f4/0x260 [ 169.899592][ T4986] io_submit_sqes+0x2ac6/0x2dc0 [ 169.904611][ T4986] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 169.911028][ T4986] __se_sys_io_uring_enter+0x49b/0x4250 [ 169.916743][ T4986] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 169.922855][ T4986] __x64_sys_io_uring_enter+0x11b/0x1a0 [ 169.928609][ T4986] do_syscall_64+0x41/0xc0 [ 169.933183][ T4986] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 169.939333][ T4986] RIP: 0033:0x7fb8ad62ad39 [ 169.943933][ T4986] 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 [ 169.963772][ T4986] RSP: 002b:00007fff51c7ed58 EFLAGS: 00000212 ORIG_RAX: 00000000000001aa [ 169.972483][ T4986] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fb8ad62ad39 [ 169.980596][ T4986] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000003 [ 169.988812][ T4986] RBP: 0000000000000f00 R08: 0000000000000000 R09: 0000000000000000 [ 169.996949][ T4986] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000001 [ 170.005092][ T4986] R13: 431bde82d7b634db R14: 00007fff51c7edb0 R15: 0000000000000001 [ 170.013181][ T4986] [ 170.016604][ T4986] Kernel Offset: disabled [ 170.021012][ T4986] Rebooting in 86400 seconds..