./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3213770888 <...> [ 3.439481][ T100] udevd[100]: starting eudev-3.2.11 [ 4.644437][ T185] sshd (185) used greatest stack depth: 23152 bytes left [ 7.046317][ T106] udevd (106) used greatest stack depth: 22608 bytes left [ 12.660988][ T30] kauditd_printk_skb: 50 callbacks suppressed [ 12.661002][ T30] audit: type=1400 audit(1694167607.952:61): 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 [ 12.666533][ T30] audit: type=1400 audit(1694167607.952:62): 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 [ 12.670949][ T30] audit: type=1400 audit(1694167607.962:63): avc: denied { write } for pid=224 comm="sh" path="pipe:[367]" dev="pipefs" ino=367 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 12.675192][ T30] audit: type=1400 audit(1694167607.962:64): 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 [ 12.679341][ T30] audit: type=1400 audit(1694167607.962:65): 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 [ 13.914367][ T226] sshd (226) used greatest stack depth: 22288 bytes left Warning: Permanently added '10.128.0.29' (ED25519) to the list of known hosts. execve("./syz-executor3213770888", ["./syz-executor3213770888"], 0x7ffe3d0f15b0 /* 10 vars */) = 0 brk(NULL) = 0x55555666d000 brk(0x55555666dd40) = 0x55555666dd40 arch_prctl(ARCH_SET_FS, 0x55555666d3c0) = 0 set_tid_address(0x55555666d690) = 293 set_robust_list(0x55555666d6a0, 24) = 0 rseq(0x55555666dce0, 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-executor3213770888", 4096) = 28 getrandom("\x20\xff\xbf\xd2\x1e\xa9\x1a\xfc", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555666dd40 brk(0x55555668ed40) = 0x55555668ed40 brk(0x55555668f000) = 0x55555668f000 mprotect(0x7f8d68b1f000, 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(0x7f8d68b253ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f8d68abe360, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f8d68aaf9e0}, 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) = 0x7f8d68a3a000 mprotect(0x7f8d68a3b000, 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=0x7f8d68a5a990, parent_tid=0x7f8d68a5a990, exit_signal=0, stack=0x7f8d68a3a000, stack_size=0x20300, tls=0x7f8d68a5a6c0} => {parent_tid=[294]}, 88) = 294 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7f8d68b253e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f8d68b253ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 294 attached [pid 294] set_robust_list(0x7f8d68a5a9a0, 24) = 0 [pid 294] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 294] mkdir("./file0", 000) = 0 [pid 294] futex(0x7f8d68b253ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f8d68b253e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f8d68b253ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] <... futex resumed>) = 1 [pid 294] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 294] futex(0x7f8d68b253ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f8d68b253e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f8d68b253ec, 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(0x7f8d68b253ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f8d68b253e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f8d68b253ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] <... futex resumed>) = 1 [ 21.108426][ T30] audit: type=1400 audit(1694167616.402:66): avc: denied { execmem } for pid=293 comm="syz-executor321" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.127718][ T30] audit: type=1400 audit(1694167616.402:67): avc: denied { read write } for pid=293 comm="syz-executor321" 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 [pid 294] umount2("./file0/../file0/file0", MNT_EXPIRE [pid 293] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 293] futex(0x7f8d68b253fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f8d68a19000 [pid 293] mprotect(0x7f8d68a1a000, 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=0x7f8d68a39990, parent_tid=0x7f8d68a39990, exit_signal=0, stack=0x7f8d68a19000, stack_size=0x20300, tls=0x7f8d68a396c0} => {parent_tid=[296]}, 88) = 296 [pid 293] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 293] futex(0x7f8d68b253f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f8d68b253fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 296 attached [pid 296] set_robust_list(0x7f8d68a399a0, 24) = 0 [pid 296] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 296] 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\x24\x00\x00\x00\x00\x00\x02\x00\xfb\xff\xff\xf3\xff\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 296] futex(0x7f8d68b253fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f8d68b253f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f8d68b253fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 296] <... futex resumed>) = 1 [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(0x7f8d68b253fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f8d68b253f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f8d68b253fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 296] <... futex resumed>) = 1 [ 21.151736][ T30] audit: type=1400 audit(1694167616.402:68): avc: denied { open } for pid=293 comm="syz-executor321" 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 [ 21.175193][ T30] audit: type=1400 audit(1694167616.402:69): avc: denied { mounton } for pid=293 comm="syz-executor321" 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 296] rename("./file0/../file0/file0", "./file0/../file0/file0" [pid 293] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 293] futex(0x7f8d68b2540c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f8d689f8000 [pid 293] mprotect(0x7f8d689f9000, 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=0x7f8d68a18990, parent_tid=0x7f8d68a18990, exit_signal=0, stack=0x7f8d689f8000, stack_size=0x20300, tls=0x7f8d68a186c0}./strace-static-x86_64: Process 297 attached => {parent_tid=[297]}, 88) = 297 [pid 293] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 293] futex(0x7f8d68b25408, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f8d68b2540c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 297] set_robust_list(0x7f8d68a189a0, 24) = 0 [pid 297] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 297] futex(0x7f8d68b2540c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 297] futex(0x7f8d68b25408, FUTEX_WAIT_PRIVATE, 0, NULL [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f8d68b25408, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 293] futex(0x7f8d68b2540c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 297] <... futex resumed>) = 0 [pid 297] 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", 8192) = 46 [pid 297] 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 297] futex(0x7f8d68b2540c, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 297] <... futex resumed>) = 1 [ 21.197789][ T30] audit: type=1400 audit(1694167616.402:70): avc: denied { mount } for pid=293 comm="syz-executor321" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 21.229809][ T294] general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN [ 21.241356][ T294] KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] [ 21.249601][ T294] CPU: 1 PID: 294 Comm: syz-executor321 Not tainted 5.15.131-syzkaller-00653-gea586874d2f9 #0 [ 21.259665][ T294] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 [ 21.269561][ T294] RIP: 0010:step_into+0x1b6/0xe70 [ 21.274422][ T294] Code: 20 0f 85 99 0a 00 00 44 8b 3b 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 09 cc 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 [ 21.293863][ T294] RSP: 0018:ffffc900009c79a0 EFLAGS: 00010207 [ 21.299761][ T294] RAX: 0000000000000003 RBX: 000000000000001e RCX: ffff8881175f2780 [ 21.307574][ T294] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 21.315384][ T294] RBP: ffffc900009c7ad0 R08: ffffffff81be14d0 R09: ffffed1022ebe76e [ 21.323198][ T294] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000138f4b [ 21.331009][ T294] R13: dffffc0000000000 R14: ffffc900009c7cc0 R15: 0000000000000081 [ 21.338820][ T294] FS: 00007f8d68a5a6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 21.347595][ T294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.354008][ T294] CR2: 0000000020005000 CR3: 000000011de0c000 CR4: 00000000003506a0 [ 21.361825][ T294] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.369629][ T294] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.377443][ T294] Call Trace: [ 21.380577][ T294] [ 21.383362][ T294] ? __die_body+0x62/0xb0 [ 21.387512][ T294] ? die_addr+0x9f/0xd0 [ 21.391507][ T294] ? exc_general_protection+0x311/0x4b0 [ 21.396892][ T294] ? asm_exc_general_protection+0x27/0x30 [ 21.402442][ T294] ? step_into+0x160/0xe70 [ 21.406701][ T294] ? step_into+0x1b6/0xe70 [ 21.410944][ T294] ? set_root+0x400/0x400 [ 21.415120][ T294] walk_component+0x359/0x610 [ 21.419627][ T294] ? nd_alloc_stack+0xf0/0xf0 [ 21.424137][ T294] ? handle_lookup_down+0x130/0x130 [ 21.429258][ T294] path_lookupat+0x16d/0x450 [ 21.433686][ T294] filename_lookup+0x230/0x5c0 [ 21.438284][ T294] ? hashlen_string+0x120/0x120 [ 21.442990][ T294] ? getname_flags+0x1fd/0x520 [ 21.447577][ T294] ? ptrace_notify+0x24c/0x350 [ 21.452172][ T294] user_path_at_empty+0x43/0x1a0 [ 21.456955][ T294] __x64_sys_umount+0xf0/0x170 [ 21.461557][ T294] ? path_umount+0xea0/0xea0 [ 21.465972][ T294] ? __kasan_check_read+0x11/0x20 [ 21.470832][ T294] ? syscall_enter_from_user_mode+0x70/0x1b0 [ 21.476648][ T294] do_syscall_64+0x3d/0xb0 [ 21.480926][ T294] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 21.486629][ T294] RIP: 0033:0x7f8d68a984b9 [ 21.490885][ 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 [ 21.510325][ T294] RSP: 002b:00007f8d68a5a218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 [ 21.518568][ T294] RAX: ffffffffffffffda RBX: 00007f8d68b253e8 RCX: 00007f8d68a984b9 [ 21.526385][ T294] RDX: 00007f8d68a984b9 RSI: 0000000000000004 RDI: 0000000020000080 [ 21.534191][ T294] RBP: 00007f8d68b253e0 R08: 0000000000000000 R09: 0000000000000000 [ 21.542006][ T294] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8d68af201c [ 21.549956][ T294] R13: 0030656c69662f30 R14: 00007f8d68af000e R15: 00007f8d68af2040 [ 21.557754][ T294] [ 21.560610][ T294] Modules linked in: [ 21.564685][ T294] ---[ end trace f7cc829fa3656b95 ]--- [ 21.570058][ T294] RIP: 0010:step_into+0x1b6/0xe70 [ 21.574918][ T294] Code: 20 0f 85 99 0a 00 00 44 8b 3b 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 09 cc 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 [ 21.594570][ T294] RSP: 0018:ffffc900009c79a0 EFLAGS: 00010207 [ 21.600535][ T294] RAX: 0000000000000003 RBX: 000000000000001e RCX: ffff8881175f2780 [ 21.608358][ T294] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 21.616068][ T294] RBP: ffffc900009c7ad0 R08: ffffffff81be14d0 R09: ffffed1022ebe76e [ 21.623935][ T294] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000138f4b [ 21.631727][ T294] R13: dffffc0000000000 R14: ffffc900009c7cc0 R15: 0000000000000081 [ 21.639562][ T294] FS: 00007f8d68a5a6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 21.648286][ T294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.654689][ T294] CR2: 0000000020005000 CR3: 000000011de0c000 CR4: 00000000003506a0 [ 21.662554][ T294] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.670349][ T294] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.678194][ T294] Kernel panic - not syncing: Fatal exception [ 21.684221][ T294] Kernel Offset: disabled [ 21.688354][ T294] Rebooting in 86400 seconds..