./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor190366323 <...> Warning: Permanently added '10.128.1.235' (ED25519) to the list of known hosts. execve("./syz-executor190366323", ["./syz-executor190366323"], 0x7ffdb077ddd0 /* 10 vars */) = 0 brk(NULL) = 0x55557f910000 brk(0x55557f910d00) = 0x55557f910d00 arch_prctl(ARCH_SET_FS, 0x55557f910380) = 0 set_tid_address(0x55557f910650) = 5190 set_robust_list(0x55557f910660, 24) = 0 rseq(0x55557f910ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor190366323", 4096) = 27 getrandom("\x44\x69\x98\x29\x68\xa1\x52\x13", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557f910d00 brk(0x55557f931d00) = 0x55557f931d00 brk(0x55557f932000) = 0x55557f932000 mprotect(0x7f433020c000, 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=0x55557f910650) = 5191 ./strace-static-x86_64: Process 5191 attached [pid 5191] set_robust_list(0x55557f910660, 24) = 0 [pid 5191] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5191] setpgid(0, 0executing program ) = 0 [pid 5191] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5191] write(3, "1000", 4) = 4 [pid 5191] close(3) = 0 [pid 5191] write(1, "executing program\n", 18) = 18 [pid 5191] memfd_create("syzkaller", 0) = 3 [pid 5191] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f4327c00000 [pid 5191] 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 5191] munmap(0x7f4327c00000, 138412032) = 0 [pid 5191] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5191] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5191] close(3) = 0 [pid 5191] close(4) = 0 [pid 5191] mkdir("./file0", 0777) = 0 [pid 5191] mount("/dev/loop0", "./file0", "squashfs", 0, "") = 0 [pid 5191] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5191] chdir("./file0") = 0 [pid 5191] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 162.567618][ T5191] loop0: detected capacity change from 0 to 8 [pid 5191] chdir("./file0") = 0 [ 162.636241][ T5191] ===================================================== [ 162.643651][ T5191] BUG: KMSAN: uninit-value in pick_link+0xd8c/0x1690 [ 162.650726][ T5191] pick_link+0xd8c/0x1690 [ 162.655257][ T5191] step_into+0x156f/0x1640 [ 162.659869][ T5191] path_openat+0x39da/0x6100 [ 162.664745][ T5191] do_filp_open+0x20e/0x590 [ 162.669415][ T5191] do_sys_openat2+0x1bf/0x2f0 [ 162.674450][ T5191] __x64_sys_openat+0x2a1/0x310 [ 162.679514][ T5191] x64_sys_call+0x1fe/0x3c10 [ 162.684454][ T5191] do_syscall_64+0xcd/0x1e0 [ 162.689159][ T5191] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 162.695328][ T5191] [ 162.697744][ T5191] Uninit was created at: [ 162.702323][ T5191] __alloc_pages_noprof+0x9d6/0xe70 [ 162.707702][ T5191] alloc_pages_mpol_noprof+0x299/0x990 [ 162.713513][ T5191] folio_alloc_noprof+0x1db/0x310 [ 162.718754][ T5191] filemap_alloc_folio_noprof+0xa6/0x440 [ 162.724703][ T5191] do_read_cache_folio+0x12a/0xfd0 [ 162.730013][ T5191] read_cache_page+0x63/0x1d0 [ 162.735029][ T5191] page_get_link+0x73/0xab0 [ 162.739629][ T5191] pick_link+0xd6c/0x1690 [ 162.744235][ T5191] step_into+0x156f/0x1640 [ 162.748815][ T5191] path_openat+0x39da/0x6100 [ 162.753689][ T5191] do_filp_open+0x20e/0x590 [ 162.758343][ T5191] do_sys_openat2+0x1bf/0x2f0 [ 162.763258][ T5191] __x64_sys_openat+0x2a1/0x310 [ 162.768294][ T5191] x64_sys_call+0x1fe/0x3c10 [ 162.773178][ T5191] do_syscall_64+0xcd/0x1e0 [ 162.777863][ T5191] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 162.785101][ T5191] [ 162.787520][ T5191] CPU: 0 UID: 0 PID: 5191 Comm: syz-executor190 Not tainted 6.10.0-syzkaller-12708-g2f8c4f506285 #0 [ 162.798825][ T5191] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 [ 162.809125][ T5191] ===================================================== [ 162.816236][ T5191] Disabling lock debugging due to kernel taint [ 162.822603][ T5191] Kernel panic - not syncing: kmsan.panic set ... [ 162.829117][ T5191] CPU: 0 UID: 0 PID: 5191 Comm: syz-executor190 Tainted: G B 6.10.0-syzkaller-12708-g2f8c4f506285 #0 [ 162.841479][ T5191] Tainted: [B]=BAD_PAGE [ 162.845704][ T5191] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 [ 162.855878][ T5191] Call Trace: [ 162.859218][ T5191] [ 162.862203][ T5191] dump_stack_lvl+0x216/0x2d0 [ 162.867005][ T5191] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 162.872938][ T5191] dump_stack+0x1e/0x30 [ 162.877214][ T5191] panic+0x4e2/0xcd0 [ 162.881223][ T5191] ? kmsan_get_metadata+0xf1/0x1c0 [ 162.886461][ T5191] kmsan_report+0x2c7/0x2d0 [ 162.891068][ T5191] ? kmsan_get_metadata+0x13e/0x1c0 [ 162.896394][ T5191] ? kmsan_get_metadata+0x13e/0x1c0 [ 162.901727][ T5191] ? kmsan_get_metadata+0x13e/0x1c0 [ 162.907104][ T5191] ? __msan_warning+0x95/0x120 [ 162.911970][ T5191] ? pick_link+0xd8c/0x1690 [ 162.916637][ T5191] ? step_into+0x156f/0x1640 [ 162.921337][ T5191] ? path_openat+0x39da/0x6100 [ 162.926187][ T5191] ? do_filp_open+0x20e/0x590 [ 162.930950][ T5191] ? do_sys_openat2+0x1bf/0x2f0 [ 162.935915][ T5191] ? __x64_sys_openat+0x2a1/0x310 [ 162.941054][ T5191] ? x64_sys_call+0x1fe/0x3c10 [ 162.945940][ T5191] ? do_syscall_64+0xcd/0x1e0 [ 162.950840][ T5191] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 162.957060][ T5191] ? filemap_read_folio+0x357/0x380 [ 162.962443][ T5191] ? do_read_cache_folio+0xc00/0xfd0 [ 162.967838][ T5191] ? __pfx_squashfs_symlink_read_folio+0x10/0x10 [ 162.974287][ T5191] ? kmsan_get_metadata+0x13e/0x1c0 [ 162.979628][ T5191] ? kmsan_get_shadow_origin_ptr+0x38/0xb0 [ 162.985626][ T5191] ? kmsan_get_metadata+0x13e/0x1c0 [ 162.990965][ T5191] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 162.996967][ T5191] ? page_get_link+0x4dd/0xab0 [ 163.001834][ T5191] ? kmsan_get_metadata+0x13e/0x1c0 [ 163.007201][ T5191] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 163.013154][ T5191] __msan_warning+0x95/0x120 [ 163.017903][ T5191] pick_link+0xd8c/0x1690 [ 163.022340][ T5191] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 163.028280][ T5191] step_into+0x156f/0x1640 [ 163.032806][ T5191] ? kmsan_internal_unpoison_memory+0x14/0x20 [ 163.038985][ T5191] ? kmsan_get_metadata+0x13e/0x1c0 [ 163.044306][ T5191] path_openat+0x39da/0x6100 [ 163.049028][ T5191] do_filp_open+0x20e/0x590 [ 163.053628][ T5191] ? __pfx_page_put_link+0x10/0x10 [ 163.058891][ T5191] do_sys_openat2+0x1bf/0x2f0 [ 163.063752][ T5191] __x64_sys_openat+0x2a1/0x310 [ 163.068728][ T5191] x64_sys_call+0x1fe/0x3c10 [ 163.073434][ T5191] do_syscall_64+0xcd/0x1e0 [ 163.078052][ T5191] ? clear_bhb_loop+0x25/0x80 [ 163.082822][ T5191] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 163.088838][ T5191] RIP: 0033:0x7f4330199a99 [ 163.093348][ T5191] 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 [ 163.113074][ T5191] RSP: 002b:00007ffcec1e60f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 163.121591][ T5191] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f4330199a99 [ 163.129736][ T5191] RDX: 0000000000000000 RSI: 0000000020000640 RDI: 00000000ffffff9c [ 163.137788][ T5191] RBP: 00007f433020c5f0 R08: 000055557f9114c0 R09: 000055557f9114c0 [ 163.145838][ T5191] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcec1e6120 [ 163.153883][ T5191] R13: 00007ffcec1e6348 R14: 431bde82d7b634db R15: 00007f43301e203b [ 163.161954][ T5191] [ 163.165289][ T5191] Kernel Offset: disabled [ 163.169674][ T5191] Rebooting in 86400 seconds..