./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2214745740 <...> Warning: Permanently added '10.128.1.74' (ED25519) to the list of known hosts. execve("./syz-executor2214745740", ["./syz-executor2214745740"], 0x7ffe681f0bf0 /* 10 vars */) = 0 brk(NULL) = 0x555562d53000 brk(0x555562d53d00) = 0x555562d53d00 arch_prctl(ARCH_SET_FS, 0x555562d53380) = 0 set_tid_address(0x555562d53650) = 5180 set_robust_list(0x555562d53660, 24) = 0 rseq(0x555562d53ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2214745740", 4096) = 28 getrandom("\x2e\x8b\xa0\xfc\x76\xef\xaa\x09", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555562d53d00 brk(0x555562d74d00) = 0x555562d74d00 brk(0x555562d75000) = 0x555562d75000 mprotect(0x7fdcf47a5000, 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=0x555562d53650) = 5181 ./strace-static-x86_64: Process 5181 attached [pid 5181] set_robust_list(0x555562d53660, 24) = 0 [pid 5181] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5181] setpgid(0, 0) = 0 [pid 5181] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program ) = 3 [pid 5181] write(3, "1000", 4) = 4 [pid 5181] close(3) = 0 [pid 5181] write(1, "executing program\n", 18) = 18 [pid 5181] memfd_create("syzkaller", 0) = 3 [pid 5181] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdcec200000 [pid 5181] write(3, "\x68\x73\x71\x73\x07\x00\x00\x00\xfd\xf1\x7c\x63\x00\x40\x00\x00\x00\x00\x00\x00\x03\x00\x0e\x00\xd1\x01\x01\x00\x04\x00\x00\x00\x1f\x01\x00\x00\x00\x00\x00\x00\xed\x02\x00\x00\x00\x00\x00\x00\x91\x02\x00\x00\x00\x00\x00\x00\xd5\x02\x00\x00\x00\x00\x00\x00\x8f\x00\x00\x00\x00\x00\x00\x00\xd0\x01\x00\x00\x00\x00\x00\x00\x49\x02\x00\x00\x00\x00\x00\x00\x83\x02\x00\x00\x00\x00\x00\x00\x1a\x73\x79\x7a"..., 4096) = 4096 [pid 5181] munmap(0x7fdcec200000, 138412032) = 0 [pid 5181] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5181] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5181] close(3) = 0 [pid 5181] close(4) = 0 [pid 5181] mkdir("./file0", 0777) = 0 [pid 5181] mount("/dev/loop0", "./file0", "squashfs", 0, "") = 0 [pid 5181] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5181] chdir("./file0") = 0 [pid 5181] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 158.985675][ T5181] loop0: detected capacity change from 0 to 8 [pid 5181] chdir("./file0") = 0 [ 159.043304][ T5181] ===================================================== [ 159.051600][ T5181] BUG: KMSAN: uninit-value in pick_link+0xd8c/0x1690 [ 159.058487][ T5181] pick_link+0xd8c/0x1690 [ 159.063839][ T5181] step_into+0x156f/0x1640 [ 159.068455][ T5181] path_openat+0x39da/0x6100 [ 159.073325][ T5181] do_filp_open+0x20e/0x590 [ 159.078011][ T5181] do_sys_openat2+0x1bf/0x2f0 [ 159.083040][ T5181] __x64_sys_openat+0x2a1/0x310 [ 159.088105][ T5181] x64_sys_call+0x1fe/0x3c10 [ 159.093022][ T5181] do_syscall_64+0xcd/0x1e0 [ 159.097753][ T5181] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 159.104118][ T5181] [ 159.106535][ T5181] Uninit was created at: [ 159.111113][ T5181] __alloc_pages_noprof+0x9d6/0xe70 [ 159.116463][ T5181] alloc_pages_mpol_noprof+0x299/0x990 [ 159.122177][ T5181] folio_alloc_noprof+0x1db/0x310 [ 159.127386][ T5181] filemap_alloc_folio_noprof+0xa6/0x440 [ 159.133260][ T5181] do_read_cache_folio+0x12a/0xfd0 [ 159.138635][ T5181] read_cache_page+0x63/0x1d0 [ 159.143551][ T5181] page_get_link+0x73/0xab0 [ 159.148217][ T5181] pick_link+0xd6c/0x1690 [ 159.152837][ T5181] step_into+0x156f/0x1640 [ 159.157438][ T5181] path_openat+0x39da/0x6100 [ 159.162285][ T5181] do_filp_open+0x20e/0x590 [ 159.166927][ T5181] do_sys_openat2+0x1bf/0x2f0 [ 159.171848][ T5181] __x64_sys_openat+0x2a1/0x310 [ 159.176899][ T5181] x64_sys_call+0x1fe/0x3c10 [ 159.181757][ T5181] do_syscall_64+0xcd/0x1e0 [ 159.186448][ T5181] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 159.192615][ T5181] [ 159.195029][ T5181] CPU: 1 UID: 0 PID: 5181 Comm: syz-executor221 Not tainted 6.10.0-syzkaller-12708-g2f8c4f506285 #0 [ 159.206018][ T5181] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 [ 159.216283][ T5181] ===================================================== [ 159.223441][ T5181] Disabling lock debugging due to kernel taint [ 159.229681][ T5181] Kernel panic - not syncing: kmsan.panic set ... [ 159.236165][ T5181] CPU: 1 UID: 0 PID: 5181 Comm: syz-executor221 Tainted: G B 6.10.0-syzkaller-12708-g2f8c4f506285 #0 [ 159.248526][ T5181] Tainted: [B]=BAD_PAGE [ 159.252725][ T5181] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 [ 159.262870][ T5181] Call Trace: [ 159.266232][ T5181] [ 159.269250][ T5181] dump_stack_lvl+0x216/0x2d0 [ 159.274051][ T5181] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 159.279982][ T5181] dump_stack+0x1e/0x30 [ 159.284253][ T5181] panic+0x4e2/0xcd0 [ 159.288291][ T5181] ? kmsan_get_metadata+0xf1/0x1c0 [ 159.293592][ T5181] kmsan_report+0x2c7/0x2d0 [ 159.298200][ T5181] ? kmsan_get_metadata+0x13e/0x1c0 [ 159.303516][ T5181] ? kmsan_get_metadata+0x13e/0x1c0 [ 159.308826][ T5181] ? kmsan_get_metadata+0x13e/0x1c0 [ 159.314137][ T5181] ? __msan_warning+0x95/0x120 [ 159.319003][ T5181] ? pick_link+0xd8c/0x1690 [ 159.323616][ T5181] ? step_into+0x156f/0x1640 [ 159.328305][ T5181] ? path_openat+0x39da/0x6100 [ 159.333172][ T5181] ? do_filp_open+0x20e/0x590 [ 159.337986][ T5181] ? do_sys_openat2+0x1bf/0x2f0 [ 159.342952][ T5181] ? __x64_sys_openat+0x2a1/0x310 [ 159.348088][ T5181] ? x64_sys_call+0x1fe/0x3c10 [ 159.352959][ T5181] ? do_syscall_64+0xcd/0x1e0 [ 159.357752][ T5181] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 159.364035][ T5181] ? filemap_read_folio+0x357/0x380 [ 159.369350][ T5181] ? do_read_cache_folio+0xc00/0xfd0 [ 159.374753][ T5181] ? __pfx_squashfs_symlink_read_folio+0x10/0x10 [ 159.381210][ T5181] ? kmsan_get_metadata+0x13e/0x1c0 [ 159.386522][ T5181] ? kmsan_get_shadow_origin_ptr+0x38/0xb0 [ 159.392447][ T5181] ? kmsan_get_metadata+0x13e/0x1c0 [ 159.397758][ T5181] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 159.403691][ T5181] ? page_get_link+0x4dd/0xab0 [ 159.408562][ T5181] ? kmsan_get_metadata+0x13e/0x1c0 [ 159.413873][ T5181] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 159.419807][ T5181] __msan_warning+0x95/0x120 [ 159.424496][ T5181] pick_link+0xd8c/0x1690 [ 159.428934][ T5181] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 159.434895][ T5181] step_into+0x156f/0x1640 [ 159.439455][ T5181] ? kmsan_internal_unpoison_memory+0x14/0x20 [ 159.445655][ T5181] ? kmsan_get_metadata+0x13e/0x1c0 [ 159.451045][ T5181] path_openat+0x39da/0x6100 [ 159.455765][ T5181] do_filp_open+0x20e/0x590 [ 159.460539][ T5181] ? __pfx_page_put_link+0x10/0x10 [ 159.465776][ T5181] do_sys_openat2+0x1bf/0x2f0 [ 159.470580][ T5181] __x64_sys_openat+0x2a1/0x310 [ 159.475599][ T5181] x64_sys_call+0x1fe/0x3c10 [ 159.480305][ T5181] do_syscall_64+0xcd/0x1e0 [ 159.484928][ T5181] ? clear_bhb_loop+0x25/0x80 [ 159.489789][ T5181] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 159.495878][ T5181] RIP: 0033:0x7fdcf4732a99 [ 159.500371][ T5181] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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 [ 159.520094][ T5181] RSP: 002b:00007fff3c1d85a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 159.528609][ T5181] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fdcf4732a99 [ 159.536670][ T5181] RDX: 0000000000000000 RSI: 0000000020000640 RDI: 00000000ffffff9c [ 159.544717][ T5181] RBP: 00007fdcf47a55f0 R08: 0000555562d544c0 R09: 0000555562d544c0 [ 159.552780][ T5181] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff3c1d85d0 [ 159.560833][ T5181] R13: 00007fff3c1d87f8 R14: 431bde82d7b634db R15: 00007fdcf477b03b [ 159.569017][ T5181] [ 159.572378][ T5181] Kernel Offset: disabled [ 159.576765][ T5181] Rebooting in 86400 seconds..