./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor32404699 <...> cess permissive=1 [ 17.560525][ T24] audit: type=1400 audit(1749558692.080:63): avc: denied { siginh } for pid=231 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.1.47' (ED25519) to the list of known hosts. execve("./syz-executor32404699", ["./syz-executor32404699"], 0x7ffe1f1f8ed0 /* 10 vars */) = 0 brk(NULL) = 0x55556c291000 brk(0x55556c291d40) = 0x55556c291d40 arch_prctl(ARCH_SET_FS, 0x55556c2913c0) = 0 set_tid_address(0x55556c291690) = 282 set_robust_list(0x55556c2916a0, 24) = 0 rseq(0x55556c291ce0, 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-executor32404699", 4096) = 26 getrandom("\xfe\x89\xbd\x44\xfe\xda\x0f\x33", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556c291d40 brk(0x55556c2b2d40) = 0x55556c2b2d40 brk(0x55556c2b3000) = 0x55556c2b3000 mprotect(0x7f24ef6be000, 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(0x7f24ef6c440c, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f24ef65d420, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f24ef64eaa0}, 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) = 0x7f24ef5d9000 mprotect(0x7f24ef5da000, 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=0x7f24ef5f9990, parent_tid=0x7f24ef5f9990, exit_signal=0, stack=0x7f24ef5d9000, stack_size=0x20300, tls=0x7f24ef5f96c0} => {parent_tid=[283]}, 88) = 283 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7f24ef6c4408, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f24ef6c440c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 283 attached [pid 283] set_robust_list(0x7f24ef5f99a0, 24) = 0 [pid 283] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 283] mkdir("./file0", 000) = 0 [pid 283] futex(0x7f24ef6c440c, FUTEX_WAKE_PRIVATE, 1000000 [pid 282] <... futex resumed>) = 0 [pid 282] futex(0x7f24ef6c4408, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 282] futex(0x7f24ef6c440c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 283] <... futex resumed>) = 1 [pid 283] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 283] futex(0x7f24ef6c440c, FUTEX_WAKE_PRIVATE, 1000000 [pid 282] <... futex resumed>) = 0 [pid 282] futex(0x7f24ef6c4408, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 282] futex(0x7f24ef6c440c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 283] <... futex resumed>) = 1 [pid 283] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=0000000000000000040000,user_id=00000000000000000000,group_id=00000000"...) = 0 [pid 283] futex(0x7f24ef6c440c, FUTEX_WAKE_PRIVATE, 1000000 [pid 282] <... futex resumed>) = 0 [pid 282] futex(0x7f24ef6c4408, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 282] futex(0x7f24ef6c440c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 283] <... futex resumed>) = 1 [pid 283] 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 283] futex(0x7f24ef6c440c, FUTEX_WAKE_PRIVATE, 1000000 [pid 282] <... futex resumed>) = 0 [pid 282] futex(0x7f24ef6c4408, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 282] futex(0x7f24ef6c440c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 283] <... futex resumed>) = 1 [pid 283] write(3, "\x50\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x27\x00\x00\x00\x00\x00\x00\x00\x08\x04\x41\x44\x6d\x06\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x40\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 283] futex(0x7f24ef6c440c, FUTEX_WAKE_PRIVATE, 1000000 [pid 282] <... futex resumed>) = 0 [pid 282] futex(0x7f24ef6c4408, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 282] futex(0x7f24ef6c440c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 283] <... futex resumed>) = 1 [ 27.367197][ T24] audit: type=1400 audit(1749558701.930:64): avc: denied { execmem } for pid=282 comm="syz-executor324" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 27.387090][ T24] audit: type=1400 audit(1749558701.940:65): avc: denied { read write } for pid=282 comm="syz-executor324" 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 [ 27.411465][ T24] audit: type=1400 audit(1749558701.940:66): avc: denied { open } for pid=282 comm="syz-executor324" 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 [ 27.434900][ T24] audit: type=1400 audit(1749558701.940:67): avc: denied { mounton } for pid=282 comm="syz-executor324" path="/root/file0" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [pid 283] read(3, [pid 282] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 282] futex(0x7f24ef6c441c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 282] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f24ef5b8000 [pid 282] mprotect(0x7f24ef5b9000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 282] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 282] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f24ef5d8990, parent_tid=0x7f24ef5d8990, exit_signal=0, stack=0x7f24ef5b8000, stack_size=0x20300, tls=0x7f24ef5d86c0} => {parent_tid=[285]}, 88) = 285 [pid 282] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 282] futex(0x7f24ef6c4418, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 282] futex(0x7f24ef6c441c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 285 attached [pid 285] set_robust_list(0x7f24ef5d89a0, 24) = 0 [pid 285] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 285] mount("./file0", "./file0", "incremental-fs", 0, NULL [pid 283] <... read resumed>"\x2f\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\x1d\x01\x00\x00\x00\x00\x00\x00\x2e\x69\x6e\x64\x65\x78\x00", 8192) = 47 [pid 283] write(3, "\x95\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x01\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x0f\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x01\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\x05\x00\x00"..., 149) = 149 [pid 283] futex(0x7f24ef6c440c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 27.457607][ T24] audit: type=1400 audit(1749558701.950:68): avc: denied { mount } for pid=282 comm="syz-executor324" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 27.459987][ T285] general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN [ 27.480761][ T24] audit: type=1400 audit(1749558702.020:69): avc: denied { mounton } for pid=282 comm="syz-executor324" path="/root/file0" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=dir permissive=1 [ 27.492068][ T285] KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] [ 27.492092][ T285] CPU: 0 PID: 285 Comm: syz-executor324 Not tainted 5.10.238-syzkaller-00282-gd76d4cd0623a #0 [ 27.492098][ T285] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 27.492133][ T285] RIP: 0010:open_or_create_special_dir+0x89/0x1d0 [ 27.492152][ T285] Code: e8 5c 55 6d ff e9 00 01 00 00 e8 52 55 6d ff 48 c7 c3 ea ff ff ff e9 ef 00 00 00 4c 89 6d d0 4c 8d 6b 30 4d 89 ef 49 c1 ef 03 <43> 80 3c 37 00 74 08 4c 89 ef e8 88 45 a7 ff 49 83 7d 00 00 74 26 [ 27.516521][ T24] audit: type=1400 audit(1749558702.080:70): avc: denied { read } for pid=77 comm="syslogd" name="log" dev="sda1" ino=2010 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:var_t tclass=lnk_file permissive=1 [ 27.523653][ T285] RSP: 0018:ffffc90000be7b38 EFLAGS: 00010207 [ 27.533956][ T24] audit: type=1400 audit(1749558702.080:71): avc: denied { search } for pid=77 comm="syslogd" name="/" dev="tmpfs" ino=1 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 27.543915][ T285] [ 27.543925][ T285] RAX: 0000000000000005 RBX: 0000000000000005 RCX: ffff8881059cbb40 [ 27.543932][ T285] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88812186e920 [ 27.543940][ T285] RBP: ffffc90000be7b70 R08: dffffc0000000000 R09: ffffed102430dd25 [ 27.543948][ T285] R10: ffffed102430dd25 R11: 1ffff1102430dd24 R12: ffff88812186e880 [ 27.543963][ T285] R13: 0000000000000035 R14: dffffc0000000000 R15: 0000000000000006 [ 27.550891][ T24] audit: type=1400 audit(1749558702.080:72): avc: denied { write } for pid=77 comm="syslogd" name="/" dev="tmpfs" ino=1 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 27.569954][ T285] FS: 00007f24ef5d86c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 27.569962][ T285] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.569970][ T285] CR2: 00007f24ef5d8d58 CR3: 000000011f623000 CR4: 00000000003506b0 [ 27.569980][ T285] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.569987][ T285] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.570000][ T285] Call Trace: [ 27.592080][ T24] audit: type=1400 audit(1749558702.080:73): avc: denied { add_name } for pid=77 comm="syslogd" name="messages" scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 27.597660][ T285] incfs_mount_fs+0x434/0x8c0 [ 27.597673][ T285] ? incfs_unlink+0x80/0x80 [ 27.597693][ T285] ? vfs_parse_fs_string+0xfe/0x160 [ 27.760384][ T285] legacy_get_tree+0xed/0x190 [ 27.765051][ T285] ? incfs_unlink+0x80/0x80 [ 27.769547][ T285] vfs_get_tree+0x89/0x260 [ 27.773943][ T285] do_new_mount+0x25a/0xa20 [ 27.778432][ T285] path_mount+0x572/0xc80 [ 27.782744][ T285] __se_sys_mount+0x318/0x380 [ 27.787409][ T285] ? do_notify_parent+0x7e0/0x7e0 [ 27.792493][ T285] ? __x64_sys_mount+0xd0/0xd0 [ 27.797260][ T285] ? fpu__clear_all+0x20/0x20 [ 27.802051][ T285] ? fpu__clear_all+0x20/0x20 [ 27.806724][ T285] __x64_sys_mount+0xbf/0xd0 [ 27.811304][ T285] do_syscall_64+0x31/0x40 [ 27.815711][ T285] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 27.821597][ T285] RIP: 0033:0x7f24ef637579 [ 27.825997][ T285] 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 [ 27.845690][ T285] RSP: 002b:00007f24ef5d8218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 27.854212][ T285] RAX: ffffffffffffffda RBX: 00007f24ef6c4418 RCX: 00007f24ef637579 [pid 283] futex(0x7f24ef6c4408, FUTEX_WAIT_PRIVATE, 0, NULL [pid 282] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 282] futex(0x7f24ef6c4408, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 283] <... futex resumed>) = 0 [pid 282] futex(0x7f24ef6c440c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 283] bpf(BPF_PROG_LOAD, NULL, 0) = -1 EFAULT (Bad address) [pid 283] futex(0x7f24ef6c440c, FUTEX_WAKE_PRIVATE, 1000000 [pid 282] <... futex resumed>) = 0 [pid 283] <... futex resumed>) = 1 [ 27.862176][ T285] RDX: 0000200000000180 RSI: 0000200000000080 RDI: 0000200000000000 [ 27.870130][ T285] RBP: 00007f24ef6c4410 R08: 0000000000000000 R09: 0000000000000000 [ 27.878083][ T285] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f24ef691034 [ 27.886042][ T285] R13: 0000200000008280 R14: 0000200000000000 R15: 00007ffe8e0ee7f8 [ 27.894028][ T285] Modules linked in: [ 27.899334][ T285] ---[ end trace 082f3ee68ae255c0 ]--- [ 27.904854][ T285] RIP: 0010:open_or_create_special_dir+0x89/0x1d0 [ 27.911305][ T285] Code: e8 5c 55 6d ff e9 00 01 00 00 e8 52 55 6d ff 48 c7 c3 ea ff ff ff e9 ef 00 00 00 4c 89 6d d0 4c 8d 6b 30 4d 89 ef 49 c1 ef 03 <43> 80 3c 37 00 74 08 4c 89 ef e8 88 45 a7 ff 49 83 7d 00 00 74 26 [ 27.930972][ T285] RSP: 0018:ffffc90000be7b38 EFLAGS: 00010207 [ 27.937074][ T285] RAX: 0000000000000005 RBX: 0000000000000005 RCX: ffff8881059cbb40 [ 27.945252][ T285] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88812186e920 [ 27.957719][ T285] RBP: ffffc90000be7b70 R08: dffffc0000000000 R09: ffffed102430dd25 [pid 283] futex(0x7f24ef6c4408, FUTEX_WAIT_PRIVATE, 0, NULL [pid 282] exit_group(0) = ? [pid 283] <... futex resumed>) = ? [pid 283] +++ exited with 0 +++ [ 27.965723][ T285] R10: ffffed102430dd25 R11: 1ffff1102430dd24 R12: ffff88812186e880 [ 27.973687][ T285] R13: 0000000000000035 R14: dffffc0000000000 R15: 0000000000000006 [ 27.981681][ T285] FS: 00007f24ef5d86c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 27.991078][ T285] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.997683][ T285] CR2: 000055c4ccda0060 CR3: 000000011f623000 CR4: 00000000003506a0 [ 28.005671][ T285] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.013647][ T285] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.021660][ T285] Kernel panic - not syncing: Fatal exception [ 28.027831][ T285] Kernel Offset: disabled [ 28.032176][ T285] Rebooting in 86400 seconds..