./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3668695581 <...> [ 26.927280][ T24] audit: type=1400 audit(1745988462.890:78): avc: denied { rlimitinh } for pid=254 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 26.929837][ T24] audit: type=1400 audit(1745988462.890:79): avc: denied { siginh } for pid=254 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.1.3' (ED25519) to the list of known hosts. execve("./syz-executor3668695581", ["./syz-executor3668695581"], 0x7ffe2216c820 /* 10 vars */) = 0 brk(NULL) = 0x555568295000 brk(0x555568295d40) = 0x555568295d40 arch_prctl(ARCH_SET_FS, 0x5555682953c0) = 0 set_tid_address(0x555568295690) = 272 set_robust_list(0x5555682956a0, 24) = 0 rseq(0x555568295ce0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3668695581", 4096) = 28 getrandom("\x61\x25\xe7\xb1\xa2\x0b\xa8\x04", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555568295d40 brk(0x5555682b6d40) = 0x5555682b6d40 brk(0x5555682b7000) = 0x5555682b7000 mprotect(0x7f15671c7000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 write(1, "executing program\n", 18executing program ) = 18 futex(0x7f15671cd3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f15671664e0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f1567157b60}, NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f15670e2000 mprotect(0x7f15670e3000, 131072, PROT_READ|PROT_WRITE) = 0 rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f1567102990, parent_tid=0x7f1567102990, exit_signal=0, stack=0x7f15670e2000, stack_size=0x20300, tls=0x7f15671026c0} => {parent_tid=[273]}, 88) = 273 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7f15671cd3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f15671cd3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 273 attached [pid 273] set_robust_list(0x7f15671029a0, 24) = 0 [pid 273] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 273] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 273] futex(0x7f15671cd3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 272] <... futex resumed>) = 0 [pid 272] futex(0x7f15671cd3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 272] futex(0x7f15671cd3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 273] <... futex resumed>) = 1 [pid 273] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 273] futex(0x7f15671cd3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 272] <... futex resumed>) = 0 [pid 272] futex(0x7f15671cd3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 272] futex(0x7f15671cd3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 273] <... futex resumed>) = 1 [pid 273] mount(NULL, "./file0", "fuse", 0, "fd=00000000000000000000003,rootmode=0000000000000000040000,user_id=00000000000000000000,group_id=000"...) = 0 [pid 273] futex(0x7f15671cd3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 272] <... futex resumed>) = 0 [pid 272] futex(0x7f15671cd3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 272] futex(0x7f15671cd3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 273] <... futex resumed>) = 1 [pid 273] read(3, "\x38\x00\x00\x00\x1a\x00\x00\x00\x02\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\x07\x00\x00\x00\x20\x00\x00\x00\x00\x00\x02\x00\xfb\xff\xff\x83", 8224) = 56 [pid 273] futex(0x7f15671cd3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 272] <... futex resumed>) = 0 [pid 272] futex(0x7f15671cd3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 272] futex(0x7f15671cd3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 273] <... futex resumed>) = 1 [pid 273] write(3, "\x50\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x2b\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", 80) = 80 [pid 273] futex(0x7f15671cd3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 272] <... futex resumed>) = 0 [pid 272] futex(0x7f15671cd3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 272] futex(0x7f15671cd3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 273] <... futex resumed>) = 1 [ 35.988534][ T24] audit: type=1400 audit(1745988471.970:80): avc: denied { execmem } for pid=272 comm="syz-executor366" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 36.008111][ T24] audit: type=1400 audit(1745988471.980:81): avc: denied { read write } for pid=272 comm="syz-executor366" name="fuse" dev="devtmpfs" ino=90 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [pid 273] read(3, [pid 272] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 272] futex(0x7f15671cd3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 272] futex(0x7f15671cd3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 272] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f15670c1000 [pid 272] mprotect(0x7f15670c2000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 272] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 272] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f15670e1990, parent_tid=0x7f15670e1990, exit_signal=0, stack=0x7f15670c1000, stack_size=0x20300, tls=0x7f15670e16c0} => {parent_tid=[275]}, 88) = 275 [pid 272] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 272] futex(0x7f15671cd3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 272] futex(0x7f15671cd3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=550000000}./strace-static-x86_64: Process 275 attached [pid 275] set_robust_list(0x7f15670e19a0, 24) = 0 [pid 275] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 275] bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_RAW_TRACEPOINT, insn_cnt=10, insns=0x200000000680, license=NULL, log_level=4, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=0, prog_name="", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=-1, func_info_rec_size=8, func_info=NULL, func_info_cnt=0, line_info_rec_size=16, line_info=NULL, line_info_cnt=0, attach_btf_id=0, attach_prog_fd=0, fd_array=NULL, ...}, 148) = -1 E2BIG (Argument list too long) [pid 275] futex(0x7f15671cd3fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 272] <... futex resumed>) = 0 [pid 272] futex(0x7f15671cd3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 272] futex(0x7f15671cd3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 275] <... futex resumed>) = 1 [pid 275] lremovexattr("./file0/../file0/file0", NULL [pid 273] <... read resumed>"\x2e\x00\x00\x00\x01\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x13\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8192) = 46 [pid 273] write(3, "\x95\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x04\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\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x11\x00\x00\x00\x0a\x00\x00\x00\x80\x06\x00\x00\x00\x20\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 149) = 149 [pid 273] futex(0x7f15671cd3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 36.031720][ T24] audit: type=1400 audit(1745988471.990:82): avc: denied { open } for pid=272 comm="syz-executor366" path="/dev/fuse" dev="devtmpfs" ino=90 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [ 36.055070][ T24] audit: type=1400 audit(1745988471.990:83): avc: denied { mounton } for pid=272 comm="syz-executor366" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 36.071282][ T275] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 36.077740][ T24] audit: type=1400 audit(1745988471.990:84): avc: denied { mount } for pid=272 comm="syz-executor366" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 36.089389][ T275] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 36.089407][ T275] CPU: 0 PID: 275 Comm: syz-executor366 Not tainted 5.10.236-syzkaller-00012-gab07aeb2c93d #0 [ 36.089412][ T275] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 36.089449][ T275] RIP: 0010:step_into+0x122/0xcf0 [ 36.145242][ T275] Code: c6 44 24 5f 00 43 0f b6 44 25 00 84 c0 48 8b 54 24 08 0f 85 51 0a 00 00 44 8b 32 4c 8b bc 24 88 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 56 0a 00 00 45 8b 3f 44 89 fe 81 e6 00 [ 36.164906][ T275] RSP: 0018:ffffc90000b27940 EFLAGS: 00010247 [ 36.170947][ T275] RAX: 0000000000000000 RBX: ffffc90000b27b60 RCX: ffff88810c998000 [ 36.178894][ T275] RDX: ffffc90000b27b98 RSI: 0000000000000000 RDI: 0000000000000000 [ 36.186836][ T275] RBP: ffffc90000b27a28 R08: 0000000000000000 R09: ffffed10234fa525 [ 36.194780][ T275] R10: ffffed10234fa525 R11: 1ffff110234fa524 R12: dffffc0000000000 [ 36.202724][ T275] R13: 1ffff92000164f73 R14: 0000000000000008 R15: 0000000000000005 [ 36.210674][ T275] FS: 00007f15670e16c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 36.219575][ T275] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.226131][ T275] CR2: 0000561b7f704c98 CR3: 000000011be8d000 CR4: 00000000003506b0 [ 36.234074][ T275] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.242027][ T275] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.249995][ T275] Call Trace: [ 36.253280][ T275] ? lookup_fast+0x2fa/0x700 [ 36.257850][ T275] ? set_root+0x3f0/0x3f0 [ 36.262155][ T275] ? __kasan_check_write+0x14/0x20 [ 36.267241][ T275] ? up_read+0x12/0x50 [ 36.271389][ T275] walk_component+0x26a/0x460 [ 36.276042][ T275] path_lookupat+0x180/0x490 [ 36.280632][ T275] filename_lookup+0x1d5/0x600 [ 36.285376][ T275] ? hashlen_string+0x120/0x120 [ 36.290213][ T275] ? getname_flags+0x206/0x500 [ 36.294959][ T275] user_path_at_empty+0x43/0x50 [ 36.299784][ T275] path_removexattr+0xb3/0x350 [ 36.304520][ T275] ? ptrace_stop+0x51e/0x9c0 [ 36.309087][ T275] ? listxattr+0x300/0x300 [ 36.313478][ T275] ? ptrace_stop+0x69f/0x9c0 [ 36.318043][ T275] ? _raw_spin_unlock_irq+0x4e/0x70 [ 36.323223][ T275] ? ptrace_notify+0x1c4/0x250 [ 36.327961][ T275] ? do_notify_parent+0x7e0/0x7e0 [ 36.332964][ T275] ? fpu__clear_all+0x20/0x20 [ 36.337627][ T275] ? fpu__clear_all+0x20/0x20 [ 36.342277][ T275] __x64_sys_lremovexattr+0x5d/0x70 [ 36.347450][ T275] do_syscall_64+0x31/0x40 [ 36.351843][ T275] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 36.357708][ T275] RIP: 0033:0x7f1567140639 [ 36.362097][ T275] 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 b0 ff ff ff f7 d8 64 89 01 48 [ 36.381673][ T275] RSP: 002b:00007f15670e1218 EFLAGS: 00000246 ORIG_RAX: 00000000000000c6 [pid 273] futex(0x7f15671cd3e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 272] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [ 36.390069][ T275] RAX: ffffffffffffffda RBX: 00007f15671cd3f8 RCX: 00007f1567140639 [ 36.398021][ T275] RDX: 00007f1567140639 RSI: 0000000000000000 RDI: 0000200000000580 [ 36.405968][ T275] RBP: 00007f15671cd3f0 R08: 0000000000000000 R09: 0000000000000000 [ 36.413912][ T275] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f156719a02c [ 36.421859][ T275] R13: 000020000000c280 R14: 0000200000000580 R15: 00007ffce28eee78 [ 36.429804][ T275] Modules linked in: [ 36.434209][ T275] ---[ end trace f629eaf84bb612db ]--- [ 36.439763][ T275] RIP: 0010:step_into+0x122/0xcf0 [ 36.444776][ T275] Code: c6 44 24 5f 00 43 0f b6 44 25 00 84 c0 48 8b 54 24 08 0f 85 51 0a 00 00 44 8b 32 4c 8b bc 24 88 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 56 0a 00 00 45 8b 3f 44 89 fe 81 e6 00 [ 36.464454][ T275] RSP: 0018:ffffc90000b27940 EFLAGS: 00010247 [ 36.470520][ T275] RAX: 0000000000000000 RBX: ffffc90000b27b60 RCX: ffff88810c998000 [ 36.478490][ T275] RDX: ffffc90000b27b98 RSI: 0000000000000000 RDI: 0000000000000000 [ 36.486441][ T275] RBP: ffffc90000b27a28 R08: 0000000000000000 R09: ffffed10234fa525 [ 36.494409][ T275] R10: ffffed10234fa525 R11: 1ffff110234fa524 R12: dffffc0000000000 [ 36.502377][ T275] R13: 1ffff92000164f73 R14: 0000000000000008 R15: 0000000000000005 [ 36.510366][ T275] FS: 00007f15670e16c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 36.519291][ T275] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.525853][ T275] CR2: 00007f156711f980 CR3: 000000011be8d000 CR4: 00000000003506a0 [pid 272] exit_group(0 [pid 273] <... futex resumed>) = ? [pid 273] +++ exited with 0 +++ [pid 272] <... exit_group resumed>) = ? [ 36.533817][ T275] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.541785][ T275] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.549745][ T275] Kernel panic - not syncing: Fatal exception [ 36.556031][ T275] Kernel Offset: disabled [ 36.560347][ T275] Rebooting in 86400 seconds..