./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2220015646 <...> [ 4.181762][ T100] udevd[100]: starting version 3.2.11 [ 4.209128][ T101] udevd[101]: starting eudev-3.2.11 [ 5.302928][ T129] ifup (129) used greatest stack depth: 22864 bytes left [ 5.833649][ T187] sshd (187) used greatest stack depth: 22352 bytes left [ 14.265948][ T28] kauditd_printk_skb: 50 callbacks suppressed [ 14.265963][ T28] audit: type=1400 audit(1694339300.903:61): avc: denied { transition } for pid=226 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 [ 14.276151][ T28] audit: type=1400 audit(1694339300.903:62): avc: denied { noatsecure } for pid=226 comm="sshd" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 14.282543][ T28] audit: type=1400 audit(1694339300.913:63): avc: denied { write } for pid=226 comm="sh" path="pipe:[10215]" dev="pipefs" ino=10215 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 14.295139][ T28] audit: type=1400 audit(1694339300.913:64): avc: denied { rlimitinh } for pid=226 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 14.313654][ T28] audit: type=1400 audit(1694339300.913:65): avc: denied { siginh } for pid=226 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.1.164' (ED25519) to the list of known hosts. execve("./syz-executor2220015646", ["./syz-executor2220015646"], 0x7ffcddc9c340 /* 10 vars */) = 0 brk(NULL) = 0x555556447000 brk(0x555556447d40) = 0x555556447d40 arch_prctl(ARCH_SET_FS, 0x5555564473c0) = 0 set_tid_address(0x555556447690) = 295 set_robust_list(0x5555564476a0, 24) = 0 rseq(0x555556447ce0, 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-executor2220015646", 4096) = 28 getrandom("\x14\xd1\x66\x6e\x27\xed\x63\xbd", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556447d40 brk(0x555556468d40) = 0x555556468d40 brk(0x555556469000) = 0x555556469000 mprotect(0x7f140f650000, 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(0x7f140f6563ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f140f5ef320, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f140f5e09a0}, 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) = 0x7f140f56b000 mprotect(0x7f140f56c000, 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=0x7f140f58b990, parent_tid=0x7f140f58b990, exit_signal=0, stack=0x7f140f56b000, stack_size=0x20300, tls=0x7f140f58b6c0} => {parent_tid=[296]}, 88) = 296 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7f140f6563e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f140f6563ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 296 attached [pid 296] set_robust_list(0x7f140f58b9a0, 24) = 0 [pid 296] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 296] mkdir("./file0", 000) = 0 [pid 296] futex(0x7f140f6563ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 295] <... futex resumed>) = 0 [pid 295] futex(0x7f140f6563e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 295] futex(0x7f140f6563ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 296] <... futex resumed>) = 1 [pid 296] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 296] futex(0x7f140f6563ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 295] <... futex resumed>) = 0 [pid 295] futex(0x7f140f6563e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 295] futex(0x7f140f6563ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 296] <... futex resumed>) = 1 [pid 296] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=0000000000000000040000,user_id=00000000000000000000,group_id=00000000"...) = 0 [pid 296] futex(0x7f140f6563ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 295] <... futex resumed>) = 0 [pid 295] futex(0x7f140f6563e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 295] futex(0x7f140f6563ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 296] <... futex resumed>) = 1 [ 23.208769][ T28] audit: type=1400 audit(1694339309.843:66): avc: denied { execmem } for pid=295 comm="syz-executor222" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.228056][ T28] audit: type=1400 audit(1694339309.853:67): avc: denied { read write } for pid=295 comm="syz-executor222" 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 [pid 296] umount2("./file0/../file0/file0", MNT_EXPIRE [pid 295] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 295] futex(0x7f140f6563fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 295] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f140f54a000 [pid 295] mprotect(0x7f140f54b000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 295] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 295] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f140f56a990, parent_tid=0x7f140f56a990, exit_signal=0, stack=0x7f140f54a000, stack_size=0x20300, tls=0x7f140f56a6c0} => {parent_tid=[298]}, 88) = 298 [pid 295] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 295] futex(0x7f140f6563f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 295] futex(0x7f140f6563fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 298 attached [pid 298] set_robust_list(0x7f140f56a9a0, 24) = 0 [pid 298] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 298] 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 298] futex(0x7f140f6563fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 295] <... futex resumed>) = 0 [pid 295] futex(0x7f140f6563f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 295] futex(0x7f140f6563fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 298] <... futex resumed>) = 1 [pid 298] 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 298] futex(0x7f140f6563fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 295] <... futex resumed>) = 0 [pid 295] futex(0x7f140f6563f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 295] futex(0x7f140f6563fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 298] <... futex resumed>) = 1 [pid 298] 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\x28\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8192) = 46 [ 23.253372][ T28] audit: type=1400 audit(1694339309.853:68): avc: denied { open } for pid=295 comm="syz-executor222" 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 [ 23.276790][ T28] audit: type=1400 audit(1694339309.863:69): avc: denied { mounton } for pid=295 comm="syz-executor222" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 23.284774][ T296] general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN [ 23.299911][ T28] audit: type=1400 audit(1694339309.863:70): avc: denied { mount } for pid=295 comm="syz-executor222" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 23.311213][ T296] KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] [ 23.311229][ T296] CPU: 1 PID: 296 Comm: syz-executor222 Not tainted 6.1.25-syzkaller-00088-gcd94fe67fd33 #0 [ 23.351483][ T296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 [ 23.361467][ T296] RIP: 0010:step_into+0x1c4/0x1090 [ 23.366409][ T296] Code: c0 0f 85 bb 0b 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 10 e8 9b fe 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 [ 23.385854][ T296] RSP: 0018:ffffc90000d57a20 EFLAGS: 00010207 [ 23.391755][ T296] RAX: 0000000000000003 RBX: 000000000000001e RCX: ffff888109463cc0 [ 23.399564][ T296] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.407377][ T296] RBP: ffffc90000d57b70 R08: ffffffff81c82c79 R09: ffffed1021ddf89d [ 23.415190][ T296] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001aaf5f [ 23.423038][ T296] R13: ffffc90000d57ca0 R14: dffffc0000000000 R15: 0000000000000081 [ 23.430820][ T296] FS: 00007f140f58b6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 23.439575][ T296] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.446019][ T296] CR2: 0000000020005000 CR3: 0000000121954000 CR4: 00000000003506a0 [ 23.453818][ T296] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.461622][ T296] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.469449][ T296] Call Trace: [ 23.472556][ T296] [ 23.475336][ T296] ? __lookup_slow+0x36e/0x3e0 [ 23.479936][ T296] ? lookup_one_len+0x2c0/0x2c0 [ 23.484621][ T296] ? set_root+0x400/0x400 [ 23.488789][ T296] walk_component+0x234/0x410 [ 23.493300][ T296] path_lookupat+0x16d/0x450 [ 23.497729][ T296] filename_lookup+0x251/0x600 [ 23.502334][ T296] ? hashlen_string+0x120/0x120 [ 23.507016][ T296] ? strncpy_from_user+0x169/0x2b0 [ 23.511958][ T296] ? getname_flags+0x1fd/0x520 [ 23.516558][ T296] ? ptrace_notify+0x249/0x350 [ 23.521161][ T296] user_path_at_empty+0x43/0x1a0 [ 23.525939][ T296] __x64_sys_umount+0xf0/0x170 [ 23.530533][ T296] ? path_umount+0xe70/0xe70 [ 23.534958][ T296] ? syscall_enter_from_user_mode+0x6a/0x190 [ 23.540773][ T296] do_syscall_64+0x3d/0xb0 [ 23.545025][ T296] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 23.550758][ T296] RIP: 0033:0x7f140f5c9479 [ 23.555007][ T296] 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 [ 23.574533][ T296] RSP: 002b:00007f140f58b218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 [ 23.582781][ T296] RAX: ffffffffffffffda RBX: 00007f140f6563e8 RCX: 00007f140f5c9479 [ 23.590590][ T296] RDX: 00007f140f5c9479 RSI: 0000000000000004 RDI: 0000000020000080 [ 23.598405][ T296] RBP: 00007f140f6563e0 R08: 0000000000000000 R09: 0000000000000000 [pid 298] write(3, "\xae\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\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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 174) = 174 [pid 298] futex(0x7f140f6563fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 298] futex(0x7f140f6563f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 295] <... futex resumed>) = 0 [ 23.606216][ T296] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f140f62301c [ 23.614026][ T296] R13: 00007f140f623038 R14: 00007f140f62100e R15: 0030656c69662f30 [ 23.621840][ T296] [ 23.624699][ T296] Modules linked in: [ 23.629237][ T296] ---[ end trace 0000000000000000 ]--- [ 23.634552][ T296] RIP: 0010:step_into+0x1c4/0x1090 [ 23.639533][ T296] Code: c0 0f 85 bb 0b 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 10 e8 9b fe 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 [pid 295] exit_group(0) = ? [pid 298] <... futex resumed>) = ? [pid 298] +++ exited with 0 +++ [ 23.658997][ T296] RSP: 0018:ffffc90000d57a20 EFLAGS: 00010207 [ 23.664810][ T296] RAX: 0000000000000003 RBX: 000000000000001e RCX: ffff888109463cc0 [ 23.672670][ T296] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.680484][ T296] RBP: ffffc90000d57b70 R08: ffffffff81c82c79 R09: ffffed1021ddf89d [ 23.688509][ T296] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001aaf5f [ 23.696764][ T296] R13: ffffc90000d57ca0 R14: dffffc0000000000 R15: 0000000000000081 [ 23.709971][ T296] FS: 00007f140f58b6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 23.718731][ T296] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.725210][ T296] CR2: 00007f140f5cada0 CR3: 0000000121954000 CR4: 00000000003506b0 [ 23.733013][ T296] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.740793][ T296] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.748585][ T296] Kernel panic - not syncing: Fatal exception [ 23.754762][ T296] Kernel Offset: disabled [ 23.758886][ T296] Rebooting in 86400 seconds..