./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1248717664 <...> [ 3.579535][ T99] udevd[99]: starting version 3.2.11 [ 3.606047][ T100] udevd[100]: starting eudev-3.2.11 [ 4.354162][ T131] ip (131) used greatest stack depth: 23120 bytes left [ 4.677537][ T180] ssh-keygen (180) used greatest stack depth: 22096 bytes left [ 12.357647][ T30] kauditd_printk_skb: 50 callbacks suppressed [ 12.357658][ T30] audit: type=1400 audit(1709113398.296:61): avc: denied { transition } for pid=224 comm="sshd" path="/bin/sh" dev="sda1" ino=89 scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 12.361700][ T30] audit: type=1400 audit(1709113398.306:62): avc: denied { noatsecure } for pid=224 comm="sshd" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 12.365217][ T30] audit: type=1400 audit(1709113398.306:63): avc: denied { write } for pid=224 comm="sh" path="pipe:[12412]" dev="pipefs" ino=12412 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 12.368512][ T30] audit: type=1400 audit(1709113398.306:64): avc: denied { rlimitinh } for pid=224 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 12.371346][ T30] audit: type=1400 audit(1709113398.306:65): avc: denied { siginh } for pid=224 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.1.155' (ED25519) to the list of known hosts. execve("./syz-executor1248717664", ["./syz-executor1248717664"], 0x7ffdcb2b37c0 /* 10 vars */) = 0 brk(NULL) = 0x555557192000 brk(0x555557192d40) = 0x555557192d40 arch_prctl(ARCH_SET_FS, 0x5555571923c0) = 0 set_tid_address(0x555557192690) = 292 set_robust_list(0x5555571926a0, 24) = 0 rseq(0x555557192ce0, 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-executor1248717664", 4096) = 28 getrandom("\x30\xdb\x6f\x09\x1c\x24\xde\xa9", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557192d40 brk(0x5555571b3d40) = 0x5555571b3d40 brk(0x5555571b4000) = 0x5555571b4000 mprotect(0x7f6614f5e000, 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 futex(0x7f6614f643ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f6614f00160, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f6614ef17e0}, 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) = 0x7f6614e7c000 mprotect(0x7f6614e7d000, 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=0x7f6614e9c990, parent_tid=0x7f6614e9c990, exit_signal=0, stack=0x7f6614e7c000, stack_size=0x20300, tls=0x7f6614e9c6c0}./strace-static-x86_64: Process 293 attached => {parent_tid=[293]}, 88) = 293 [pid 292] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 292] futex(0x7f6614f643e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 292] futex(0x7f6614f643ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 293] set_robust_list(0x7f6614e9c9a0, 24) = 0 [pid 293] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 293] mkdir("./file0", 000) = 0 [pid 293] futex(0x7f6614f643ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] <... futex resumed>) = 0 [pid 293] <... futex resumed>) = 1 [pid 292] futex(0x7f6614f643e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 292] futex(0x7f6614f643ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 293] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 293] futex(0x7f6614f643ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 293] futex(0x7f6614f643e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 292] <... futex resumed>) = 0 [pid 292] futex(0x7f6614f643e8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 293] <... futex resumed>) = 0 [pid 292] futex(0x7f6614f643ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 293] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=0000000000000000040000,user_id=00000000000000000000,group_id=00000000"...) = 0 [pid 293] futex(0x7f6614f643ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] <... futex resumed>) = 0 [pid 293] <... futex resumed>) = 1 [pid 292] futex(0x7f6614f643e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] read(3, [pid 292] <... futex resumed>) = 0 [pid 293] <... read resumed>"\x68\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\x24\x00\x00\x00\x00\x00\x02\x00\xfb\xff\xff\x73\x01\x00\x00\x80\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"..., 8224) = 104 [pid 292] futex(0x7f6614f643ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 293] futex(0x7f6614f643ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 293] <... futex resumed>) = 0 [pid 292] futex(0x7f6614f643e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] mount(NULL, "./file0/../file0/file0/file0", NULL, 0, NULL [pid 292] <... futex resumed>) = 0 [pid 292] futex(0x7f6614f643ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 292] futex(0x7f6614f643ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 292] futex(0x7f6614f643fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 292] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6614e5b000 [pid 292] mprotect(0x7f6614e5c000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 292] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 292] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f6614e7b990, parent_tid=0x7f6614e7b990, exit_signal=0, stack=0x7f6614e5b000, stack_size=0x20300, tls=0x7f6614e7b6c0} => {parent_tid=[295]}, 88) = 295 [pid 292] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 292] futex(0x7f6614f643f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 292] futex(0x7f6614f643fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 295 attached [pid 295] set_robust_list(0x7f6614e7b9a0, 24) = 0 [pid 295] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 295] 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\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 295] futex(0x7f6614f643fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] <... futex resumed>) = 0 [pid 292] futex(0x7f6614f643f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 292] futex(0x7f6614f643fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 295] <... futex resumed>) = 1 [pid 295] read(3, "\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\x25\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8224) = 46 [pid 295] futex(0x7f6614f643fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] <... futex resumed>) = 0 [pid 292] futex(0x7f6614f643f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 292] futex(0x7f6614f643fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 295] <... futex resumed>) = 1 [pid 295] write(3, "\xa0\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x00\x00\x00\x00\x08\x00\x00\x00\x03\x00\x00\x00\x06\x00\x00\x00\x00\x00\x00\x00\x38\x01\x00\x00\x00\x00\x00\x00\x06\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\xff\x0f\x00\x00"..., 160) = 160 [pid 295] futex(0x7f6614f643fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [ 20.646499][ T30] audit: type=1400 audit(1709113406.586:66): avc: denied { execmem } for pid=292 comm="syz-executor124" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.652977][ T30] audit: type=1400 audit(1709113406.596:67): avc: denied { read write } for pid=292 comm="syz-executor124" name="fuse" dev="devtmpfs" ino=91 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [ 20.656828][ T30] audit: type=1400 audit(1709113406.596:68): avc: denied { open } for pid=292 comm="syz-executor124" path="/dev/fuse" dev="devtmpfs" ino=91 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [ 20.661249][ T30] audit: type=1400 audit(1709113406.606:69): avc: denied { mounton } for pid=292 comm="syz-executor124" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 20.664747][ T30] audit: type=1400 audit(1709113406.606:70): avc: denied { mount } for pid=292 comm="syz-executor124" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [pid 295] futex(0x7f6614f643f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 292] <... futex resumed>) = 0 [ 20.721103][ T293] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 20.732645][ T293] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 20.740889][ T293] CPU: 0 PID: 293 Comm: syz-executor124 Not tainted 5.15.148-syzkaller-00718-g993bed180178 #0 [ 20.750955][ T293] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 20.760852][ T293] RIP: 0010:step_into+0x1b6/0xe70 [ 20.765711][ T293] Code: 20 0f 85 99 0a 00 00 44 8b 3b 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 79 c2 f3 ff 48 8b 9c 24 b8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 86 0a 00 00 8b 1b 89 de 81 e6 00 00 07 [ 20.785157][ T293] RSP: 0018:ffffc900007cf7e0 EFLAGS: 00010202 [ 20.791053][ T293] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88811e543b40 [ 20.798864][ T293] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 20.806675][ T293] RBP: ffffc900007cf910 R08: ffffffff81be6f60 R09: ffffed10237b2935 [pid 292] exit_group(0) = ? [pid 295] <... futex resumed>) = ? [pid 295] +++ exited with 0 +++ [ 20.814486][ T293] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920000f9f13 [ 20.822300][ T293] R13: dffffc0000000000 R14: ffffc900007cfc40 R15: 0000000000000011 [ 20.830109][ T293] FS: 00007f6614e9c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 20.838879][ T293] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.845298][ T293] CR2: 0000000020004220 CR3: 000000011e2bb000 CR4: 00000000003506b0 [ 20.853196][ T293] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.861007][ T293] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.868817][ T293] Call Trace: [ 20.871943][ T293] [ 20.874721][ T293] ? __die_body+0x62/0xb0 [ 20.878886][ T293] ? die_addr+0x9f/0xd0 [ 20.882876][ T293] ? exc_general_protection+0x311/0x4b0 [ 20.888263][ T293] ? dentry_free+0xbf/0x160 [ 20.892597][ T293] ? asm_exc_general_protection+0x27/0x30 [ 20.898156][ T293] ? step_into+0x160/0xe70 [ 20.902413][ T293] ? step_into+0x1b6/0xe70 [ 20.906671][ T293] ? set_root+0x400/0x400 [ 20.910828][ T293] walk_component+0x359/0x610 [ 20.915345][ T293] ? nd_alloc_stack+0xf0/0xf0 [ 20.919856][ T293] ? security_inode_permission+0xb0/0xf0 [ 20.925412][ T293] ? fuse_do_getattr+0x7e0/0x7e0 [ 20.930182][ T293] link_path_walk+0x642/0xd90 [ 20.934699][ T293] ? handle_lookup_down+0x130/0x130 [ 20.939732][ T293] path_lookupat+0xa0/0x450 [ 20.944071][ T293] filename_lookup+0x230/0x5c0 [ 20.948671][ T293] ? hashlen_string+0x120/0x120 [ 20.953367][ T293] ? getname_flags+0x1fd/0x520 [ 20.957956][ T293] user_path_at_empty+0x43/0x1a0 [ 20.962730][ T293] __se_sys_mount+0x285/0x3b0 [ 20.967255][ T293] ? __x64_sys_mount+0xd0/0xd0 [ 20.971844][ T293] ? __kasan_check_read+0x11/0x20 [ 20.976705][ T293] __x64_sys_mount+0xbf/0xd0 [ 20.981131][ T293] do_syscall_64+0x3d/0xb0 [ 20.985381][ T293] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 20.991126][ T293] RIP: 0033:0x7f6614eda2b9 [ 20.995366][ T293] 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 [ 21.014806][ T293] RSP: 002b:00007f6614e9c218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 21.023051][ T293] RAX: ffffffffffffffda RBX: 00007f6614f643e8 RCX: 00007f6614eda2b9 [ 21.030862][ T293] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000000 [ 21.038676][ T293] RBP: 00007f6614f643e0 R08: 0000000000000000 R09: 0000000000000000 [ 21.046835][ T293] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6614f31018 [ 21.054643][ T293] R13: 00007f6614f3100e R14: 0030656c69662f2e R15: 00007f6614f31004 [ 21.062459][ T293] [ 21.065320][ T293] Modules linked in: [ 21.069458][ T293] ---[ end trace b6daa7e05682df95 ]--- [ 21.074734][ T293] RIP: 0010:step_into+0x1b6/0xe70 [ 21.079643][ T293] Code: 20 0f 85 99 0a 00 00 44 8b 3b 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 79 c2 f3 ff 48 8b 9c 24 b8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 86 0a 00 00 8b 1b 89 de 81 e6 00 00 07 [ 21.099090][ T293] RSP: 0018:ffffc900007cf7e0 EFLAGS: 00010202 [ 21.104970][ T293] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88811e543b40 [ 21.112803][ T293] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 21.120589][ T293] RBP: ffffc900007cf910 R08: ffffffff81be6f60 R09: ffffed10237b2935 [ 21.128360][ T293] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920000f9f13 [ 21.136217][ T293] R13: dffffc0000000000 R14: ffffc900007cfc40 R15: 0000000000000011 [ 21.144062][ T293] FS: 00007f6614e9c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 21.152803][ T293] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.159171][ T293] CR2: 0000000020004220 CR3: 000000011e2bb000 CR4: 00000000003506b0 [ 21.167016][ T293] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.174844][ T293] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.182627][ T293] Kernel panic - not syncing: Fatal exception [ 21.188740][ T293] Kernel Offset: disabled [ 21.192861][ T293] Rebooting in 86400 seconds..