./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2144322022 <...> d { noatsecure } for pid=221 comm="sshd" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 15.220357][ T24] audit: type=1400 audit(1740465261.030:63): avc: denied { write } for pid=221 comm="sh" path="pipe:[13926]" dev="pipefs" ino=13926 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 15.225139][ T24] audit: type=1400 audit(1740465261.030:64): avc: denied { rlimitinh } for pid=221 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 15.227989][ T24] audit: type=1400 audit(1740465261.030:65): avc: denied { siginh } for pid=221 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.249' (ED25519) to the list of known hosts. execve("./syz-executor2144322022", ["./syz-executor2144322022"], 0x7ffd5596dd90 /* 10 vars */) = 0 brk(NULL) = 0x555562768000 brk(0x555562768d40) = 0x555562768d40 arch_prctl(ARCH_SET_FS, 0x5555627683c0) = 0 set_tid_address(0x555562768690) = 291 set_robust_list(0x5555627686a0, 24) = 0 rseq(0x555562768ce0, 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-executor2144322022", 4096) = 28 getrandom("\x66\xd7\xee\xde\x83\xd0\x26\x8b", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555562768d40 brk(0x555562789d40) = 0x555562789d40 brk(0x55556278a000) = 0x55556278a000 mprotect(0x7f8c22677000, 16384, PROT_READ) = 0 mmap(0x3ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x3ffffffff000 mmap(0x400000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x400000000000 mmap(0x400001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x400001000000 write(1, "executing program\n", 18executing program ) = 18 futex(0x7f8c2267d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f8c22616360, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f8c226079e0}, 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) = 0x7f8c22592000 mprotect(0x7f8c22593000, 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=0x7f8c225b2990, parent_tid=0x7f8c225b2990, exit_signal=0, stack=0x7f8c22592000, stack_size=0x20300, tls=0x7f8c225b26c0} => {parent_tid=[292]}, 88) = 292 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7f8c2267d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f8c2267d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 292 attached [pid 292] set_robust_list(0x7f8c225b29a0, 24) = 0 [pid 292] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 292] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 292] futex(0x7f8c2267d3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 291] futex(0x7f8c2267d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7f8c2267d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] <... futex resumed>) = 1 [pid 292] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 292] futex(0x7f8c2267d3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 291] futex(0x7f8c2267d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7f8c2267d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] <... futex resumed>) = 1 [pid 292] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=00000000000000000040000,user_id=00000000000000000000,group_id=0000000"...) = 0 [pid 292] futex(0x7f8c2267d3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 291] futex(0x7f8c2267d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7f8c2267d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] <... futex resumed>) = 1 [pid 292] 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 292] futex(0x7f8c2267d3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 291] futex(0x7f8c2267d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7f8c2267d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] <... futex resumed>) = 1 [ 25.358412][ T24] audit: type=1400 audit(1740465271.180:66): avc: denied { execmem } for pid=291 comm="syz-executor214" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 25.378656][ T24] audit: type=1400 audit(1740465271.180:67): avc: denied { read write } for pid=291 comm="syz-executor214" 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 [pid 292] unlinkat(AT_FDCWD, "./file0/file0", 0 [pid 291] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 291] futex(0x7f8c2267d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f8c22571000 [pid 291] mprotect(0x7f8c22572000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 291] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 291] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f8c22591990, parent_tid=0x7f8c22591990, exit_signal=0, stack=0x7f8c22571000, stack_size=0x20300, tls=0x7f8c225916c0} => {parent_tid=[294]}, 88) = 294 [pid 291] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 291] futex(0x7f8c2267d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7f8c2267d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 294 attached [pid 294] set_robust_list(0x7f8c225919a0, 24) = 0 [pid 294] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 294] write(3, "\x20\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x00\x00\x00\x00", 32) = 32 [pid 294] futex(0x7f8c2267d3fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 291] futex(0x7f8c2267d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7f8c2267d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] <... futex resumed>) = 1 [pid 294] 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\x24\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8192) = 46 [ 25.402096][ T24] audit: type=1400 audit(1740465271.180:68): avc: denied { open } for pid=291 comm="syz-executor214" 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 [ 25.425184][ T24] audit: type=1400 audit(1740465271.180:69): avc: denied { mounton } for pid=291 comm="syz-executor214" 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] write(3, "\x90\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 144) = 144 [pid 294] futex(0x7f8c2267d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [ 25.447940][ T24] audit: type=1400 audit(1740465271.180:70): avc: denied { mount } for pid=291 comm="syz-executor214" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 25.451989][ T292] general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] PREEMPT SMP KASAN [ 25.481348][ T292] KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f] [ 25.489581][ T292] CPU: 0 PID: 292 Comm: syz-executor214 Not tainted 5.10.234-syzkaller-00023-g3f5f2283d684 #0 [pid 294] futex(0x7f8c2267d3f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 291] <... futex resumed>) = 0 [ 25.499649][ T292] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 25.509566][ T292] RIP: 0010:do_unlinkat+0x3b2/0x8b0 [ 25.514574][ T292] Code: de e8 f2 82 b6 ff 31 c0 81 fb 00 00 20 00 0f 94 c0 41 bf ec ff ff ff 41 29 c7 e9 99 00 00 00 49 8d 7d 30 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 52 1e f4 ff 49 8b 45 30 48 89 44 24 28 4c [ 25.534019][ T292] RSP: 0018:ffffc90000b17d80 EFLAGS: 00010202 [ 25.539918][ T292] RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffff8881206c3b40 [ 25.547733][ T292] RDX: ffff8881206c3b40 RSI: 0000000000000000 RDI: 0000000000000038 [ 25.555542][ T292] RBP: ffffc90000b17f00 R08: ffffffff81b43fc3 R09: ffffed10219c802e [ 25.563357][ T292] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 25.571162][ T292] R13: 0000000000000008 R14: 1ffff110219c8028 R15: dffffc0000000000 [ 25.578974][ T292] FS: 00007f8c225b26c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 25.587741][ T292] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.594164][ T292] CR2: 000040000000a000 CR3: 0000000107fca000 CR4: 00000000003506b0 [ 25.601978][ T292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.609784][ T292] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.617593][ T292] Call Trace: [ 25.620728][ T292] ? __die_body+0x62/0xb0 [ 25.624887][ T292] ? die_addr+0x9f/0xd0 [ 25.628883][ T292] ? exc_general_protection+0x3ff/0x490 [ 25.634280][ T292] ? asm_exc_general_protection+0x1e/0x30 [ 25.639821][ T292] ? do_unlinkat+0x333/0x8b0 [ 25.644240][ T292] ? do_unlinkat+0x3b2/0x8b0 [ 25.648674][ T292] ? fsnotify_link_count+0x90/0x90 [ 25.653620][ T292] ? __check_object_size+0x2e6/0x3c0 [ 25.658741][ T292] ? strncpy_from_user+0x18e/0x2d0 [ 25.663688][ T292] ? getname_flags+0x1fd/0x520 [ 25.668285][ T292] __x64_sys_unlinkat+0xcd/0xf0 [ 25.672969][ T292] do_syscall_64+0x34/0x70 [ 25.677232][ T292] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 25.682951][ T292] RIP: 0033:0x7f8c225f04b9 [ 25.687208][ T292] 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 [ 25.706645][ T292] RSP: 002b:00007f8c225b2218 EFLAGS: 00000246 ORIG_RAX: 0000000000000107 [ 25.714893][ T292] RAX: ffffffffffffffda RBX: 00007f8c2267d3e8 RCX: 00007f8c225f04b9 [ 25.722702][ T292] RDX: 0000000000000000 RSI: 0000400000000040 RDI: 00000000ffffff9c [ 25.730512][ T292] RBP: 00007f8c2267d3e0 R08: 0000000000000000 R09: 0000000000000000 [ 25.738327][ T292] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8c2264a03c [ 25.746136][ T292] R13: 0000400000008280 R14: 00007f8c22648016 R15: 00004000000020c0 [ 25.753947][ T292] Modules linked in: [pid 291] exit_group(0) = ? [pid 294] <... futex resumed>) = ? [pid 294] +++ exited with 0 +++ [ 25.757873][ T292] ---[ end trace 595e67a2e5436282 ]--- [ 25.763188][ T292] RIP: 0010:do_unlinkat+0x3b2/0x8b0 [ 25.768217][ T292] Code: de e8 f2 82 b6 ff 31 c0 81 fb 00 00 20 00 0f 94 c0 41 bf ec ff ff ff 41 29 c7 e9 99 00 00 00 49 8d 7d 30 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 52 1e f4 ff 49 8b 45 30 48 89 44 24 28 4c [ 25.787633][ T292] RSP: 0018:ffffc90000b17d80 EFLAGS: 00010202 [ 25.793510][ T292] RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffff8881206c3b40 [ 25.801366][ T292] RDX: ffff8881206c3b40 RSI: 0000000000000000 RDI: 0000000000000038 [ 25.809223][ T292] RBP: ffffc90000b17f00 R08: ffffffff81b43fc3 R09: ffffed10219c802e [ 25.816974][ T292] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 25.824756][ T292] R13: 0000000000000008 R14: 1ffff110219c8028 R15: dffffc0000000000 [ 25.832597][ T292] FS: 00007f8c225b26c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 25.841357][ T292] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.847784][ T292] CR2: 000040000000a000 CR3: 0000000107fca000 CR4: 00000000003506b0 [ 25.855570][ T292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.863446][ T292] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.871219][ T292] Kernel panic - not syncing: Fatal exception [ 25.877357][ T292] Kernel Offset: disabled [ 25.881484][ T292] Rebooting in 86400 seconds..