./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3459444725 <...> Warning: Permanently added '10.128.0.213' (ED25519) to the list of known hosts. execve("./syz-executor3459444725", ["./syz-executor3459444725"], 0x7ffd559d29c0 /* 10 vars */) = 0 brk(NULL) = 0x55555751c000 brk(0x55555751cd40) = 0x55555751cd40 arch_prctl(ARCH_SET_FS, 0x55555751c3c0) = 0 set_tid_address(0x55555751c690) = 293 set_robust_list(0x55555751c6a0, 24) = 0 rseq(0x55555751cce0, 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-executor3459444725", 4096) = 28 getrandom("\xd7\xe2\xfe\xbc\xf7\xa7\x96\x21", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555751cd40 brk(0x55555753dd40) = 0x55555753dd40 brk(0x55555753e000) = 0x55555753e000 mprotect(0x7f4cdfaa2000, 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(0x7f4cdfaa83ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f4cdfa44160, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f4cdfa357e0}, 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) = 0x7f4cdf9c0000 mprotect(0x7f4cdf9c1000, 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=0x7f4cdf9e0990, parent_tid=0x7f4cdf9e0990, exit_signal=0, stack=0x7f4cdf9c0000, stack_size=0x20300, tls=0x7f4cdf9e06c0} => {parent_tid=[294]}, 88) = 294 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7f4cdfaa83e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f4cdfaa83ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 294 attached [pid 294] set_robust_list(0x7f4cdf9e09a0, 24) = 0 [pid 294] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 294] mkdir("./file0", 000) = 0 [pid 294] futex(0x7f4cdfaa83ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 294] futex(0x7f4cdfaa83e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f4cdfaa83e8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 293] futex(0x7f4cdfaa83ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] <... futex resumed>) = 0 [pid 294] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 294] futex(0x7f4cdfaa83ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f4cdfaa83e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f4cdfaa83ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] <... futex resumed>) = 1 [pid 294] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=0000000000000000040000,user_id=00000000000000000000,group_id=00000000"...) = 0 [pid 294] futex(0x7f4cdfaa83ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f4cdfaa83e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f4cdfaa83ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] <... futex resumed>) = 1 [pid 294] read(3, "\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\x25\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 294] futex(0x7f4cdfaa83ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f4cdfaa83e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f4cdfaa83ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] <... futex resumed>) = 1 [ 21.124486][ T28] audit: type=1400 audit(1709093094.892:66): avc: denied { execmem } for pid=293 comm="syz-executor345" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.132322][ T28] audit: type=1400 audit(1709093094.902:67): avc: denied { read write } for pid=293 comm="syz-executor345" name="fuse" dev="devtmpfs" ino=93 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [ 21.140548][ T28] audit: type=1400 audit(1709093094.902:68): avc: denied { open } for pid=293 comm="syz-executor345" path="/dev/fuse" dev="devtmpfs" ino=93 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [ 21.143760][ T28] audit: type=1400 audit(1709093094.902:69): avc: denied { mounton } for pid=293 comm="syz-executor345" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [pid 294] mount(NULL, "./file0/../file0/file0/file0", NULL, 0, NULL [pid 293] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 293] futex(0x7f4cdfaa83fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f4cdf99f000 [pid 293] mprotect(0x7f4cdf9a0000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 293] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 293] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f4cdf9bf990, parent_tid=0x7f4cdf9bf990, exit_signal=0, stack=0x7f4cdf99f000, stack_size=0x20300, tls=0x7f4cdf9bf6c0} => {parent_tid=[296]}, 88) = 296 ./strace-static-x86_64: Process 296 attached [pid 293] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 293] futex(0x7f4cdfaa83f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f4cdfaa83fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 296] set_robust_list(0x7f4cdf9bf9a0, 24) = 0 [pid 296] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 296] 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 296] futex(0x7f4cdfaa83fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f4cdfaa83f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f4cdfaa83fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 296] <... futex resumed>) = 1 [pid 296] 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\x26\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8224) = 46 [pid 296] futex(0x7f4cdfaa83fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f4cdfaa83f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f4cdfaa83fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 296] <... futex resumed>) = 1 [pid 296] 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 296] futex(0x7f4cdfaa83fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 296] futex(0x7f4cdfaa83f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 293] <... futex resumed>) = 0 [ 21.156200][ T28] audit: type=1400 audit(1709093094.902:70): avc: denied { mount } for pid=293 comm="syz-executor345" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 21.190269][ T294] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 21.201819][ T294] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 21.210071][ T294] CPU: 1 PID: 294 Comm: syz-executor345 Not tainted 6.1.68-syzkaller-00033-gd68f68a9d732 #0 [ 21.219958][ T294] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 21.229854][ T294] RIP: 0010:step_into+0x1c4/0x1090 [ 21.234806][ T294] Code: c0 0f 85 bb 0b 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 10 e8 db fa f2 ff 48 8b 9c 24 d8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 a8 0b 00 00 8b 1b 89 de 81 e6 00 00 07 [ 21.254249][ T294] RSP: 0018:ffffc90000e578a0 EFLAGS: 00010202 [ 21.260144][ T294] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff888108cd8000 [pid 293] exit_group(0) = ? [pid 296] <... futex resumed>) = ? [pid 296] +++ exited with 0 +++ [ 21.267962][ T294] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 21.275762][ T294] RBP: ffffc90000e579f0 R08: ffffffff81c91a29 R09: ffffed10224b6345 [ 21.283573][ T294] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001caf2f [ 21.291475][ T294] R13: ffffc90000e57c20 R14: dffffc0000000000 R15: 0000000000000011 [ 21.299283][ T294] FS: 00007f4cdf9e06c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 21.308060][ T294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.314476][ T294] CR2: 0000000020004220 CR3: 0000000113d60000 CR4: 00000000003506a0 [ 21.322291][ T294] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.330098][ T294] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.338020][ T294] Call Trace: [ 21.341133][ T294] [ 21.343907][ T294] ? __die_body+0x62/0xb0 [ 21.348084][ T294] ? die_addr+0x9f/0xd0 [ 21.352069][ T294] ? exc_general_protection+0x317/0x4c0 [ 21.357457][ T294] ? asm_exc_general_protection+0x27/0x30 [ 21.363009][ T294] ? step_into+0x179/0x1090 [ 21.367342][ T294] ? step_into+0x1c4/0x1090 [ 21.371680][ T294] ? __lookup_slow+0x36e/0x3e0 [ 21.376281][ T294] ? lookup_one_len+0x2c0/0x2c0 [ 21.380968][ T294] ? set_root+0x400/0x400 [ 21.385136][ T294] link_path_walk+0x72c/0xee0 [ 21.389650][ T294] ? handle_lookup_down+0x130/0x130 [ 21.394686][ T294] path_lookupat+0xa0/0x450 [ 21.399020][ T294] filename_lookup+0x251/0x600 [ 21.403626][ T294] ? hashlen_string+0x120/0x120 [ 21.408308][ T294] ? strncpy_from_user+0x169/0x2b0 [ 21.413251][ T294] ? getname_flags+0x1fd/0x520 [ 21.417851][ T294] user_path_at_empty+0x43/0x1a0 [ 21.422629][ T294] __se_sys_mount+0x285/0x3b0 [ 21.427139][ T294] ? __x64_sys_mount+0xd0/0xd0 [ 21.431737][ T294] ? fpregs_restore_userregs+0x130/0x290 [ 21.437206][ T294] __x64_sys_mount+0xbf/0xd0 [ 21.441728][ T294] do_syscall_64+0x3d/0xb0 [ 21.445973][ T294] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 21.451701][ T294] RIP: 0033:0x7f4cdfa1e2b9 [ 21.455959][ T294] 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 [ 21.475398][ T294] RSP: 002b:00007f4cdf9e0218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 21.483641][ T294] RAX: ffffffffffffffda RBX: 00007f4cdfaa83e8 RCX: 00007f4cdfa1e2b9 [ 21.491450][ T294] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000000 [ 21.499261][ T294] RBP: 00007f4cdfaa83e0 R08: 0000000000000000 R09: 0000000000000000 [ 21.507072][ T294] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4cdfa75018 [ 21.514887][ T294] R13: 00007f4cdfa7500e R14: 0030656c69662f2e R15: 00007f4cdfa75004 [ 21.522700][ T294] [ 21.525562][ T294] Modules linked in: [ 21.529417][ T294] ---[ end trace 0000000000000000 ]--- [ 21.534594][ T294] RIP: 0010:step_into+0x1c4/0x1090 [ 21.539612][ T294] Code: c0 0f 85 bb 0b 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 10 e8 db fa f2 ff 48 8b 9c 24 d8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 a8 0b 00 00 8b 1b 89 de 81 e6 00 00 07 [ 21.559034][ T294] RSP: 0018:ffffc90000e578a0 EFLAGS: 00010202 [ 21.564881][ T294] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff888108cd8000 [ 21.572945][ T294] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 21.580776][ T294] RBP: ffffc90000e579f0 R08: ffffffff81c91a29 R09: ffffed10224b6345 [ 21.588558][ T294] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001caf2f [ 21.596353][ T294] R13: ffffc90000e57c20 R14: dffffc0000000000 R15: 0000000000000011 [ 21.604204][ T294] FS: 00007f4cdf9e06c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 21.612946][ T294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.619398][ T294] CR2: 0000000020004220 CR3: 0000000113d60000 CR4: 00000000003506a0 [ 21.627170][ T294] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.635016][ T294] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.642810][ T294] Kernel panic - not syncing: Fatal exception [ 21.649035][ T294] Kernel Offset: disabled [ 21.653159][ T294] Rebooting in 86400 seconds..