./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor898054298 <...> Warning: Permanently added '10.128.10.32' (ED25519) to the list of known hosts. execve("./syz-executor898054298", ["./syz-executor898054298"], 0x7ffed772c5e0 /* 10 vars */) = 0 brk(NULL) = 0x5555561e9000 brk(0x5555561e9d00) = 0x5555561e9d00 arch_prctl(ARCH_SET_FS, 0x5555561e9380) = 0 set_tid_address(0x5555561e9650) = 5014 set_robust_list(0x5555561e9660, 24) = 0 rseq(0x5555561e9ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor898054298", 4096) = 27 getrandom("\x94\xb3\xd3\xc5\xc2\x32\x90\x89", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555561e9d00 brk(0x55555620ad00) = 0x55555620ad00 brk(0x55555620b000) = 0x55555620b000 mprotect(0x7fc29b25a000, 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=0x5555561e9650) = 5015 ./strace-static-x86_64: Process 5015 attached [pid 5015] set_robust_list(0x5555561e9660, 24) = 0 [pid 5015] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5015] setpgid(0, 0) = 0 [pid 5015] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5015] write(3, "1000", 4) = 4 [pid 5015] close(3) = 0 [pid 5015] 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 5015] mmap(NULL, 524352, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 3, 0) = 0x7fc29b12c000 [pid 5015] mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 3, 0x10000000) = 0x7fc29b02c000 [ 145.091797][ T5015] ===================================================== [ 145.099025][ T5015] BUG: KMSAN: uninit-value in io_rw_fail+0x1a7/0x1b0 [ 145.106069][ T5015] io_rw_fail+0x1a7/0x1b0 [ 145.110594][ T5015] io_req_defer_failed+0x217/0x3e0 [ 145.116057][ T5015] io_queue_sqe_fallback+0x1f4/0x260 [ 145.121683][ T5015] io_submit_sqes+0x2b85/0x2ff0 [ 145.126770][ T5015] __se_sys_io_uring_enter+0x491/0x43f0 [ 145.132698][ T5015] __x64_sys_io_uring_enter+0x11b/0x1a0 [ 145.138507][ T5015] do_syscall_64+0x44/0x110 [ 145.143268][ T5015] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 145.149338][ T5015] [ 145.151867][ T5015] Uninit was created at: [ 145.156333][ T5015] slab_post_alloc_hook+0x129/0xa70 [ 145.161787][ T5015] __kmem_cache_alloc_node+0x5c9/0x970 [ 145.167540][ T5015] __kmalloc+0x121/0x3c0 [ 145.172220][ T5015] io_req_prep_async+0x384/0x5a0 [ 145.177332][ T5015] io_queue_sqe_fallback+0x95/0x260 [ 145.182840][ T5015] io_submit_sqes+0x2b85/0x2ff0 [ 145.187835][ T5015] __se_sys_io_uring_enter+0x491/0x43f0 [ 145.193654][ T5015] __x64_sys_io_uring_enter+0x11b/0x1a0 [ 145.199367][ T5015] do_syscall_64+0x44/0x110 [ 145.204164][ T5015] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 145.210232][ T5015] [ 145.212790][ T5015] CPU: 1 PID: 5015 Comm: syz-executor898 Not tainted 6.7.0-rc2-syzkaller-00095-gd3fa86b1a7b4 #0 [ 145.223480][ T5015] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 [ 145.233826][ T5015] ===================================================== [ 145.240878][ T5015] Disabling lock debugging due to kernel taint [ 145.247376][ T5015] Kernel panic - not syncing: kmsan.panic set ... [ 145.253993][ T5015] CPU: 1 PID: 5015 Comm: syz-executor898 Tainted: G B 6.7.0-rc2-syzkaller-00095-gd3fa86b1a7b4 #0 [ 145.266036][ T5015] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 [ 145.276202][ T5015] Call Trace: [ 145.279588][ T5015] [ 145.282616][ T5015] dump_stack_lvl+0x1bf/0x240 [ 145.287531][ T5015] dump_stack+0x1e/0x20 [ 145.291774][ T5015] panic+0x4de/0xc90 [ 145.295831][ T5015] ? add_taint+0x108/0x1a0 [ 145.300447][ T5015] kmsan_report+0x2d0/0x2d0 [ 145.305249][ T5015] ? __msan_warning+0x96/0x110 [ 145.310163][ T5015] ? io_rw_fail+0x1a7/0x1b0 [ 145.314790][ T5015] ? io_req_defer_failed+0x217/0x3e0 [ 145.320213][ T5015] ? io_queue_sqe_fallback+0x1f4/0x260 [ 145.325876][ T5015] ? io_submit_sqes+0x2b85/0x2ff0 [ 145.331143][ T5015] ? __se_sys_io_uring_enter+0x491/0x43f0 [ 145.337052][ T5015] ? __x64_sys_io_uring_enter+0x11b/0x1a0 [ 145.342957][ T5015] ? do_syscall_64+0x44/0x110 [ 145.347750][ T5015] ? entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 145.354006][ T5015] ? xa_load+0x19e/0x1c0 [ 145.358413][ T5015] ? io_buffer_select+0xe9c/0xfc0 [ 145.363618][ T5015] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 145.369629][ T5015] ? io_import_iovec+0x5ef/0x9c0 [ 145.374807][ T5015] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 145.380782][ T5015] __msan_warning+0x96/0x110 [ 145.385544][ T5015] io_rw_fail+0x1a7/0x1b0 [ 145.389979][ T5015] ? io_setup_async_rw+0x7c0/0x7c0 [ 145.395211][ T5015] io_req_defer_failed+0x217/0x3e0 [ 145.400506][ T5015] io_queue_sqe_fallback+0x1f4/0x260 [ 145.405962][ T5015] io_submit_sqes+0x2b85/0x2ff0 [ 145.410979][ T5015] __se_sys_io_uring_enter+0x491/0x43f0 [ 145.416695][ T5015] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 145.422649][ T5015] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 145.428623][ T5015] __x64_sys_io_uring_enter+0x11b/0x1a0 [ 145.434448][ T5015] do_syscall_64+0x44/0x110 [ 145.439122][ T5015] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 145.445269][ T5015] RIP: 0033:0x7fc29b1e7b79 [ 145.449762][ T5015] 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 [ 145.469540][ T5015] RSP: 002b:00007ffcc755aba8 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa [ 145.479420][ T5015] RAX: ffffffffffffffda RBX: 00000000000024fa RCX: 00007fc29b1e7b79 [ 145.487507][ T5015] RDX: 0000000000000000 RSI: 0000000000002d3e RDI: 0000000000000003 [ 145.495641][ T5015] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 145.503729][ T5015] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 145.511804][ T5015] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 145.519909][ T5015] [ 145.523309][ T5015] Kernel Offset: disabled [ 145.527707][ T5015] Rebooting in 86400 seconds..