./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4268541834 <...> Warning: Permanently added '10.128.0.6' (ED25519) to the list of known hosts. execve("./syz-executor4268541834", ["./syz-executor4268541834"], 0x7fffeed7db90 /* 10 vars */) = 0 brk(NULL) = 0x555560752000 brk(0x555560752e00) = 0x555560752e00 arch_prctl(ARCH_SET_FS, 0x555560752480) = 0 set_tid_address(0x555560752750) = 5797 set_robust_list(0x555560752760, 24) = 0 rseq(0x555560752da0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4268541834", 4096) = 28 getrandom("\xfc\x0d\x15\xf5\x98\x5a\xc8\x10", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555560752e00 brk(0x555560773e00) = 0x555560773e00 brk(0x555560774000) = 0x555560774000 mprotect(0x7fd164ecc000, 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=0x7fd164e278e0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fd164e2f550}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7fd164e278e0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fd164e2f550}, NULL, 8) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555560752750) = 5798 ./strace-static-x86_64: Process 5798 attached [pid 5798] set_robust_list(0x555560752760, 24) = 0 [pid 5798] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5798] setpgid(0, 0) = 0 [pid 5798] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5798] write(3, "1000", 4) = 4 [pid 5798] close(3) = 0 [pid 5798] write(1, "executing program\n", 18executing program ) = 18 [pid 5798] ioctl(-1, SIOCSIFVLAN, 0x20000200) = -1 EBADF (Bad file descriptor) [pid 5798] 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|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}}) = 3 [pid 5798] mmap(NULL, 524352, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 3, 0) = 0x7fd164d97000 [pid 5798] mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 3, 0x10000000) = 0x7fd164c97000 [pid 5798] openat(AT_FDCWD, "cpu.stat", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 4 [pid 5798] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x70\x69\x6d\x72\x65\x67\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00"..., 280) = 280 [pid 5798] mmap(0x20000000, 12288, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 4, 0) = 0x20000000 [pid 5798] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x20000040} --- [pid 5798] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x20000041} --- [pid 5798] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x20000042} --- [pid 5798] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x20000044} --- [pid 5798] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x20000048} --- [pid 5798] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x20000050} --- [pid 5798] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x20000058} --- [pid 5798] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x2000005c} --- [pid 5798] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x20000060} --- [pid 5798] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x20000068} --- [pid 5798] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x2000006a} --- [pid 5798] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x2000006c} --- [ 177.917413][ T5798] ===================================================== [ 177.924920][ T5798] BUG: KMSAN: uninit-value in io_nop+0x549/0x8a0 [ 177.932125][ T5798] io_nop+0x549/0x8a0 [ 177.936426][ T5798] io_issue_sqe+0x420/0x2130 [ 177.941164][ T5798] io_submit_sqes+0x11bc/0x2f80 [ 177.946229][ T5798] __se_sys_io_uring_enter+0x423/0x4aa0 [ 177.951933][ T5798] __x64_sys_io_uring_enter+0x11f/0x1a0 [ 177.957716][ T5798] x64_sys_call+0xce5/0x3c30 [ 177.962493][ T5798] do_syscall_64+0xcd/0x1e0 [ 177.967237][ T5798] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 177.973407][ T5798] [ 177.975778][ T5798] Uninit was created at: [ 177.980152][ T5798] __alloc_pages_noprof+0x9a7/0xe00 [ 177.985626][ T5798] alloc_pages_mpol_noprof+0x299/0x990 [ 177.991270][ T5798] alloc_pages_noprof+0x1bf/0x1e0 [ 177.996545][ T5798] allocate_slab+0x320/0x12e0 [ 178.001393][ T5798] ___slab_alloc+0x12ef/0x35e0 [ 178.006377][ T5798] kmem_cache_alloc_bulk_noprof+0x486/0x1330 [ 178.012536][ T5798] __io_alloc_req_refill+0x84/0x5b0 [ 178.017958][ T5798] io_submit_sqes+0x9a2/0x2f80 [ 178.022964][ T5798] __se_sys_io_uring_enter+0x423/0x4aa0 [ 178.028675][ T5798] __x64_sys_io_uring_enter+0x11f/0x1a0 [ 178.034519][ T5798] x64_sys_call+0xce5/0x3c30 [ 178.039307][ T5798] do_syscall_64+0xcd/0x1e0 [ 178.044086][ T5798] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 178.050167][ T5798] [ 178.052553][ T5798] CPU: 0 UID: 0 PID: 5798 Comm: syz-executor426 Not tainted 6.12.0-syzkaller-03657-g43fb83c17ba2 #0 [ 178.063564][ T5798] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 [ 178.073826][ T5798] ===================================================== [ 178.080807][ T5798] Disabling lock debugging due to kernel taint [ 178.087176][ T5798] Kernel panic - not syncing: kmsan.panic set ... [ 178.093738][ T5798] CPU: 0 UID: 0 PID: 5798 Comm: syz-executor426 Tainted: G B 6.12.0-syzkaller-03657-g43fb83c17ba2 #0 [ 178.106164][ T5798] Tainted: [B]=BAD_PAGE [ 178.110371][ T5798] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 [ 178.120508][ T5798] Call Trace: [ 178.123843][ T5798] [ 178.126936][ T5798] dump_stack_lvl+0x216/0x2d0 [ 178.131773][ T5798] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 178.137694][ T5798] dump_stack+0x1e/0x30 [ 178.141938][ T5798] panic+0x4e2/0xcf0 [ 178.145962][ T5798] ? kmsan_get_metadata+0xc1/0x1c0 [ 178.151201][ T5798] kmsan_report+0x2c7/0x2d0 [ 178.155812][ T5798] ? kmsan_get_metadata+0x13e/0x1c0 [ 178.161135][ T5798] ? kmsan_internal_set_shadow_origin+0x69/0x100 [ 178.167627][ T5798] ? kmsan_get_metadata+0x13e/0x1c0 [ 178.172950][ T5798] ? __msan_warning+0x95/0x120 [ 178.177868][ T5798] ? io_nop+0x549/0x8a0 [ 178.182135][ T5798] ? io_issue_sqe+0x420/0x2130 [ 178.186984][ T5798] ? io_submit_sqes+0x11bc/0x2f80 [ 178.192110][ T5798] ? __se_sys_io_uring_enter+0x423/0x4aa0 [ 178.197930][ T5798] ? __x64_sys_io_uring_enter+0x11f/0x1a0 [ 178.203753][ T5798] ? x64_sys_call+0xce5/0x3c30 [ 178.208628][ T5798] ? do_syscall_64+0xcd/0x1e0 [ 178.213393][ T5798] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 178.219580][ T5798] ? kmsan_internal_set_shadow_origin+0x69/0x100 [ 178.226051][ T5798] ? kmsan_get_metadata+0x13e/0x1c0 [ 178.231376][ T5798] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 178.237318][ T5798] ? _raw_spin_unlock_irqrestore+0x3f/0x60 [ 178.243273][ T5798] ? kmsan_get_metadata+0x13e/0x1c0 [ 178.248581][ T5798] ? kmsan_get_metadata+0x13e/0x1c0 [ 178.253886][ T5798] ? kmsan_internal_set_shadow_origin+0x69/0x100 [ 178.260327][ T5798] ? kmsan_get_metadata+0x13e/0x1c0 [ 178.265634][ T5798] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 178.271549][ T5798] ? kmsan_get_metadata+0x13e/0x1c0 [ 178.276857][ T5798] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 178.282775][ T5798] __msan_warning+0x95/0x120 [ 178.287488][ T5798] io_nop+0x549/0x8a0 [ 178.291595][ T5798] ? __pfx_io_nop+0x10/0x10 [ 178.296211][ T5798] io_issue_sqe+0x420/0x2130 [ 178.300895][ T5798] ? kmsan_get_metadata+0x13e/0x1c0 [ 178.306205][ T5798] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 178.312135][ T5798] io_submit_sqes+0x11bc/0x2f80 [ 178.317098][ T5798] ? kmsan_internal_set_shadow_origin+0x69/0x100 [ 178.323543][ T5798] __se_sys_io_uring_enter+0x423/0x4aa0 [ 178.329192][ T5798] ? kmsan_get_metadata+0x13e/0x1c0 [ 178.334514][ T5798] ? kmsan_get_metadata+0x13e/0x1c0 [ 178.339821][ T5798] ? kmsan_get_metadata+0x13e/0x1c0 [ 178.345129][ T5798] ? kmsan_internal_set_shadow_origin+0x69/0x100 [ 178.351557][ T5798] ? kmsan_get_metadata+0x13e/0x1c0 [ 178.356869][ T5798] ? kmsan_get_metadata+0x13e/0x1c0 [ 178.362171][ T5798] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 178.368092][ T5798] ? _raw_spin_unlock_irq+0x31/0x50 [ 178.373405][ T5798] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 178.379328][ T5798] __x64_sys_io_uring_enter+0x11f/0x1a0 [ 178.384988][ T5798] x64_sys_call+0xce5/0x3c30 [ 178.389700][ T5798] do_syscall_64+0xcd/0x1e0 [ 178.394300][ T5798] ? clear_bhb_loop+0x25/0x80 [ 178.399098][ T5798] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 178.405148][ T5798] RIP: 0033:0x7fd164e597b9 [ 178.409641][ T5798] 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 [ 178.429372][ T5798] RSP: 002b:00007ffec9da98e8 EFLAGS: 00000212 ORIG_RAX: 00000000000001aa [ 178.437893][ T5798] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fd164e597b9 [ 178.445980][ T5798] RDX: 0000000000000000 RSI: 0000000000002d3e RDI: 0000000000000003 [ 178.454078][ T5798] RBP: 00000000000024fa R08: 0000000000000000 R09: 0000000000000000 [ 178.462128][ T5798] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000001 [ 178.470204][ T5798] R13: 431bde82d7b634db R14: 00007ffec9da9940 R15: 0000000000000001 [ 178.478274][ T5798] [ 178.481670][ T5798] Kernel Offset: disabled [ 178.486142][ T5798] Rebooting in 86400 seconds..