./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3363184591 <...> [ 14.423873][ T24] audit: type=1400 audit(1721510390.790:62): avc: denied { noatsecure } for pid=234 comm="sshd" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 14.426649][ T24] audit: type=1400 audit(1721510390.790:63): avc: denied { write } for pid=234 comm="sh" path="pipe:[13329]" dev="pipefs" ino=13329 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 14.429982][ T24] audit: type=1400 audit(1721510390.790:64): avc: denied { rlimitinh } for pid=234 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 14.432549][ T24] audit: type=1400 audit(1721510390.790:65): avc: denied { siginh } for pid=234 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.1.200' (ED25519) to the list of known hosts. execve("./syz-executor3363184591", ["./syz-executor3363184591"], 0x7ffd621d5d30 /* 10 vars */) = 0 brk(NULL) = 0x555556a68000 brk(0x555556a68e00) = 0x555556a68e00 arch_prctl(ARCH_SET_FS, 0x555556a68480) = 0 set_tid_address(0x555556a68750) = 302 set_robust_list(0x555556a68760, 24) = 0 rseq(0x555556a68da0, 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-executor3363184591", 4096) = 28 getrandom("\xec\xdb\xad\xd5\x63\x51\xbd\x3e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556a68e00 brk(0x555556a89e00) = 0x555556a89e00 brk(0x555556a8a000) = 0x555556a8a000 mprotect(0x7fd613fd1000, 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 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7fd613f15b40, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fd613f1e270}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7fd613f15b40, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fd613f1e270}, NULL, 8) = 0 write(1, "executing program\n", 18executing program ) = 18 futex(0x7fd613fd73ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7fd613f732e0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fd613f1e270}, 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) = 0x7fd613eeb000 mprotect(0x7fd613eec000, 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=0x7fd613f0b990, parent_tid=0x7fd613f0b990, exit_signal=0, stack=0x7fd613eeb000, stack_size=0x20240, tls=0x7fd613f0b6c0} => {parent_tid=[303]}, 88) = 303 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7fd613fd73e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7fd613fd73ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 303 attached [pid 303] set_robust_list(0x7fd613f0b9a0, 24) = 0 [pid 303] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 303] mkdir("./file0", 0777) = 0 [pid 303] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 303] futex(0x7fd613fd73ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 302] <... futex resumed>) = 0 [pid 302] futex(0x7fd613fd73e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 302] futex(0x7fd613fd73ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 303] <... futex resumed>) = 1 [pid 303] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 303] futex(0x7fd613fd73ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 302] <... futex resumed>) = 0 [pid 302] futex(0x7fd613fd73e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 302] futex(0x7fd613fd73ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 303] <... futex resumed>) = 1 [pid 303] mount(NULL, "./file0", "fuse", 0, "fd=00000000000000000000003,rootmode=0000000000000000040000,user_id=00000000000000000000,group_id=000"...) = 0 [pid 303] futex(0x7fd613fd73ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 302] <... futex resumed>) = 0 [pid 302] futex(0x7fd613fd73e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 302] futex(0x7fd613fd73ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 303] <... futex resumed>) = 1 [pid 303] 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 303] futex(0x7fd613fd73ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 302] <... futex resumed>) = 0 [pid 302] futex(0x7fd613fd73e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 302] futex(0x7fd613fd73ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 303] <... futex resumed>) = 1 [pid 303] write(3, "\x50\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x28\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 303] futex(0x7fd613fd73ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 302] <... futex resumed>) = 0 [pid 302] futex(0x7fd613fd73e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 302] futex(0x7fd613fd73ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 303] <... futex resumed>) = 1 [ 35.947468][ T24] audit: type=1400 audit(1721510412.320:66): avc: denied { execmem } for pid=302 comm="syz-executor336" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 35.967135][ T24] audit: type=1400 audit(1721510412.330:67): avc: denied { read write } for pid=302 comm="syz-executor336" 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 [ 35.990600][ T24] audit: type=1400 audit(1721510412.330:68): avc: denied { open } for pid=302 comm="syz-executor336" 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 [ 36.014067][ T24] audit: type=1400 audit(1721510412.340:69): avc: denied { mounton } for pid=302 comm="syz-executor336" 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 303] read(3, [pid 302] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 302] futex(0x7fd613fd73fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 302] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fd613eca000 [pid 302] mprotect(0x7fd613ecb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 302] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 302] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fd613eea990, parent_tid=0x7fd613eea990, exit_signal=0, stack=0x7fd613eca000, stack_size=0x20240, tls=0x7fd613eea6c0} => {parent_tid=[305]}, 88) = 305 [pid 302] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 302] futex(0x7fd613fd73f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 302] futex(0x7fd613fd73fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 305 attached [pid 305] set_robust_list(0x7fd613eea9a0, 24) = 0 [pid 305] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 305] rmdir("./file0/../file0/file0" [pid 303] <... read resumed>"\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\x31\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8192) = 46 [pid 303] write(3, "\x96\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x08\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xfe\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\x00\x00\x00\x00"..., 150) = 150 [pid 303] futex(0x7fd613fd73ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 36.036519][ T24] audit: type=1400 audit(1721510412.340:70): avc: denied { mount } for pid=302 comm="syz-executor336" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 36.038123][ T305] general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN [ 36.069884][ T305] KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] [ 36.078126][ T305] CPU: 0 PID: 305 Comm: syz-executor336 Not tainted 5.10.221-syzkaller-01371-g1240968f7644 #0 [ 36.088187][ T305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 [ 36.098107][ T305] RIP: 0010:do_rmdir+0x28e/0x5c0 [ 36.102859][ T305] Code: e8 d7 9b b6 ff 45 89 e5 48 bb 00 00 00 00 00 fc ff df eb 7c 49 8d 5c 24 30 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 e4 2f f4 ff 48 83 3b 00 74 32 e8 99 [ 36.122298][ T305] RSP: 0018:ffffc90000b67de0 EFLAGS: 00010207 [ 36.128200][ T305] RAX: 0000000000000006 RBX: 0000000000000036 RCX: dffffc0000000000 [ 36.136014][ T305] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000 [ 36.143828][ T305] RBP: ffffc90000b67f18 R08: ffffffff81b67de8 R09: ffffed1023a45960 [ 36.151637][ T305] R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000006 [ 36.159446][ T305] R13: ffff88811d22cad0 R14: 1ffff11023a4595a R15: ffffc90000b67e01 [ 36.167437][ T305] FS: 00007fd613eea6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 36.176196][ T305] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.182620][ T305] CR2: 00007fd613eead58 CR3: 0000000117c7a000 CR4: 00000000003506b0 [ 36.190442][ T305] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.198249][ T305] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.206077][ T305] Call Trace: [ 36.209201][ T305] ? __die_body+0x62/0xb0 [ 36.213358][ T305] ? die_addr+0x9f/0xd0 [ 36.217351][ T305] ? exc_general_protection+0x3ff/0x490 [ 36.222732][ T305] ? asm_exc_general_protection+0x1e/0x30 [ 36.228283][ T305] ? fast_dput+0x78/0x2a0 [ 36.232444][ T305] ? do_rmdir+0x28e/0x5c0 [ 36.236610][ T305] ? d_delete_notify+0xd0/0xd0 [ 36.241209][ T305] ? strncpy_from_user+0x18e/0x2d0 [ 36.246168][ T305] ? getname_flags+0x1fd/0x520 [ 36.250756][ T305] __x64_sys_rmdir+0x49/0x50 [ 36.255183][ T305] do_syscall_64+0x34/0x70 [ 36.259436][ T305] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 36.265163][ T305] RIP: 0033:0x7fd613f4d6a9 [ 36.269417][ T305] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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 [ 36.288856][ T305] RSP: 002b:00007fd613eea168 EFLAGS: 00000246 ORIG_RAX: 0000000000000054 [pid 303] futex(0x7fd613fd73e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 302] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [ 36.297099][ T305] RAX: ffffffffffffffda RBX: 00007fd613fd73f8 RCX: 00007fd613f4d6a9 [ 36.304911][ T305] RDX: 00007fd613f27fa6 RSI: 24100b22eb7aa61e RDI: 0000000020000200 [ 36.312725][ T305] RBP: 00007fd613fd73f0 R08: 00007ffc46aac527 R09: 00007fd613fd73f8 [ 36.320534][ T305] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd613fd73fc [ 36.328352][ T305] R13: 000000000000006e R14: 00007ffc46aac440 R15: 00007ffc46aac528 [ 36.336158][ T305] Modules linked in: [ 36.340149][ T305] ---[ end trace 2d8192c1fcdca89c ]--- [ 36.345435][ T305] RIP: 0010:do_rmdir+0x28e/0x5c0 [ 36.350219][ T305] Code: e8 d7 9b b6 ff 45 89 e5 48 bb 00 00 00 00 00 fc ff df eb 7c 49 8d 5c 24 30 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 e4 2f f4 ff 48 83 3b 00 74 32 e8 99 [ 36.369667][ T305] RSP: 0018:ffffc90000b67de0 EFLAGS: 00010207 [ 36.375520][ T305] RAX: 0000000000000006 RBX: 0000000000000036 RCX: dffffc0000000000 [ 36.383355][ T305] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000 [ 36.391172][ T305] RBP: ffffc90000b67f18 R08: ffffffff81b67de8 R09: ffffed1023a45960 [ 36.398986][ T305] R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000006 [ 36.406772][ T305] R13: ffff88811d22cad0 R14: 1ffff11023a4595a R15: ffffc90000b67e01 [ 36.414617][ T305] FS: 00007fd613eea6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 36.423363][ T305] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.429788][ T305] CR2: 00007fd613eead58 CR3: 0000000117c7a000 CR4: 00000000003506b0 [ 36.437596][ T305] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.445386][ T305] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.453225][ T305] Kernel panic - not syncing: Fatal exception [ 36.459175][ T305] Kernel Offset: disabled [ 36.463268][ T305] Rebooting in 86400 seconds..