./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1829560531 <...> Warning: Permanently added '10.128.1.56' (ED25519) to the list of known hosts. execve("./syz-executor1829560531", ["./syz-executor1829560531"], 0x7ffce9eb9ae0 /* 10 vars */) = 0 brk(NULL) = 0x55555dc4d000 brk(0x55555dc4dd40) = 0x55555dc4dd40 arch_prctl(ARCH_SET_FS, 0x55555dc4d3c0) = 0 set_tid_address(0x55555dc4d690) = 296 set_robust_list(0x55555dc4d6a0, 24) = 0 rseq(0x55555dc4dce0, 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-executor1829560531", 4096) = 28 getrandom("\x76\xb7\xff\x27\x1f\x73\xdc\xfb", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555dc4dd40 brk(0x55555dc6ed40) = 0x55555dc6ed40 brk(0x55555dc6f000) = 0x55555dc6f000 mprotect(0x7fdebf5c5000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 write(1, "executing program\n", 18executing program ) = 18 futex(0x7fdebf5cb3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7fdebf5643a0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fdebf555a20}, 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) = 0x7fdebf4cc000 mprotect(0x7fdebf4cd000, 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=0x7fdebf4ec990, parent_tid=0x7fdebf4ec990, exit_signal=0, stack=0x7fdebf4cc000, stack_size=0x20300, tls=0x7fdebf4ec6c0} => {parent_tid=[297]}, 88) = 297 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7fdebf5cb3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7fdebf5cb3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 297 attached [pid 297] set_robust_list(0x7fdebf4ec9a0, 24) = 0 [pid 297] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 297] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 297] futex(0x7fdebf5cb3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 296] <... futex resumed>) = 0 [pid 296] futex(0x7fdebf5cb3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 296] futex(0x7fdebf5cb3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 297] <... futex resumed>) = 1 [pid 297] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 297] futex(0x7fdebf5cb3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 296] <... futex resumed>) = 0 [pid 296] futex(0x7fdebf5cb3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 296] futex(0x7fdebf5cb3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 297] <... futex resumed>) = 1 [pid 297] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=0000000000000000040000,user_id=00000000000000000000,group_id=00000000"...) = 0 [pid 297] futex(0x7fdebf5cb3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 296] <... futex resumed>) = 0 [pid 296] futex(0x7fdebf5cb3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 296] futex(0x7fdebf5cb3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 297] <... futex resumed>) = 1 [pid 297] 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\x29\x00\x00\x00\x00\x00\x02\x00\xfb\xff\xff\x73\xfd\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\x00\x00\x00\x00\x00\x00\x00"..., 4294966877) = 104 [pid 297] futex(0x7fdebf5cb3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 296] <... futex resumed>) = 0 [pid 296] futex(0x7fdebf5cb3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 296] futex(0x7fdebf5cb3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 297] <... futex resumed>) = 1 [pid 297] write(3, "\x50\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x2b\x00\x00\x00\x00\x00\x00\x00\x15\x08\x01\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", 80) = 80 [pid 297] futex(0x7fdebf5cb3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 296] <... futex resumed>) = 0 [pid 296] futex(0x7fdebf5cb3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 297] <... futex resumed>) = 1 [pid 296] futex(0x7fdebf5cb3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [ 23.398300][ T36] audit: type=1400 audit(1753386447.590:64): avc: denied { execmem } for pid=296 comm="syz-executor182" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.417888][ T36] audit: type=1400 audit(1753386447.600:65): avc: denied { read write } for pid=296 comm="syz-executor182" name="fuse" dev="devtmpfs" ino=23 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [pid 297] link("./file0/../file0/file0", NULL [pid 296] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 296] futex(0x7fdebf5cb3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 296] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdebf4ab000 [pid 296] mprotect(0x7fdebf4ac000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 296] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 296] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fdebf4cb990, parent_tid=0x7fdebf4cb990, exit_signal=0, stack=0x7fdebf4ab000, stack_size=0x20300, tls=0x7fdebf4cb6c0}./strace-static-x86_64: Process 299 attached [pid 299] set_robust_list(0x7fdebf4cb9a0, 24) = 0 [pid 299] rt_sigprocmask(SIG_SETMASK, [], [pid 296] <... clone3 resumed> => {parent_tid=[299]}, 88) = 299 [pid 299] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 296] rt_sigprocmask(SIG_SETMASK, [], [pid 299] futex(0x7fdebf5cb3f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 296] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 296] futex(0x7fdebf5cb3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 299] <... futex resumed>) = 0 [pid 299] read(3, [pid 296] futex(0x7fdebf5cb3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 299] <... 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\x29\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8192) = 46 [pid 299] write(3, "\xad\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\x01\x00\x00\x00\x00\x00\x00\x00\x00\x08\x00\x00\x00\x00\x00\x00\xfe\xff\xff\xff\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\x0a\x00\x00\x00"..., 173) = 173 [ 23.441553][ T36] audit: type=1400 audit(1753386447.600:66): avc: denied { open } for pid=296 comm="syz-executor182" path="/dev/fuse" dev="devtmpfs" ino=23 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [ 23.465187][ T297] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN PTI [ 23.465666][ T36] audit: type=1400 audit(1753386447.600:67): avc: denied { mounton } for pid=296 comm="syz-executor182" path="/root/file0" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 23.478358][ T297] KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] [ 23.478395][ T297] CPU: 0 UID: 0 PID: 297 Comm: syz-executor182 Not tainted 6.12.30-syzkaller-g379b99745e88 #0 11522de10711ed1cb6b8bd0366ad005e7892f9f5 [ 23.478420][ T297] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 23.478430][ T297] RIP: 0010:step_into+0x121/0xf50 [ 23.501764][ T36] audit: type=1400 audit(1753386447.600:68): avc: denied { mount } for pid=296 comm="syz-executor182" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 23.509845][ T297] Code: 74 24 08 c6 44 24 7f 00 43 0f b6 04 3c 84 c0 4d 89 fd 0f 85 10 0c 00 00 45 8b 36 4c 8b bc 24 a8 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 0f 0c 00 00 45 8b 3f 44 89 fe 81 e6 00 [ 23.509864][ T297] RSP: 0018:ffffc900012afa80 EFLAGS: 00010207 [ 23.509892][ T297] RAX: 0000000000000003 RBX: ffffc900012afcc0 RCX: ffff88812e1c9300 [ 23.533312][ T36] audit: type=1400 audit(1753386447.730:69): avc: denied { read } for pid=91 comm="syslogd" name="log" dev="sda1" ino=2010 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:var_t tclass=lnk_file permissive=1 [ 23.533701][ T297] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.538726][ T36] audit: type=1400 audit(1753386447.730:70): avc: denied { search } for pid=91 comm="syslogd" name="/" dev="tmpfs" ino=1 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [pid 299] futex(0x7fdebf5cb3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 299] futex(0x7fdebf5cb3f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 296] <... futex resumed>) = 0 [ 23.560738][ T297] RBP: ffffc900012afb98 R08: ffff88813401129f R09: 1ffff11026802253 [ 23.560760][ T297] R10: dffffc0000000000 R11: ffffed1026802254 R12: 1ffff92000255f9f [ 23.560772][ T297] R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000001d [ 23.560782][ T297] FS: 00007fdebf4ec6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 23.560798][ T297] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.560809][ T297] CR2: 000055da7b71b388 CR3: 0000000101f0e000 CR4: 00000000003526b0 [ 23.560824][ T297] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.560835][ T297] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.581019][ T36] audit: type=1400 audit(1753386447.730:71): avc: denied { write } for pid=91 comm="syslogd" name="/" dev="tmpfs" ino=1 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 23.586479][ T297] Call Trace: [ 23.586489][ T297] [ 23.586496][ T297] ? __lookup_slow+0x389/0x400 [pid 296] exit_group(0) = ? [pid 299] <... futex resumed>) = ? [pid 299] +++ exited with 0 +++ [ 23.594775][ T36] audit: type=1400 audit(1753386447.730:72): avc: denied { add_name } for pid=91 comm="syslogd" name="messages" scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 23.616160][ T297] ? lookup_one_len+0x2f0/0x2f0 [ 23.616195][ T297] ? down_read+0x79/0xe0 [ 23.616218][ T297] ? set_root+0x420/0x420 [ 23.624512][ T36] audit: type=1400 audit(1753386447.730:73): avc: denied { create } for pid=91 comm="syslogd" name="messages" scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 23.645681][ T297] ? __kasan_check_write+0x18/0x20 [ 23.645712][ T297] ? up_read+0x26/0x1d0 [ 23.645728][ T297] walk_component+0x255/0x440 [ 23.645750][ T297] path_lookupat+0x180/0x4a0 [ 23.815975][ T297] filename_lookup+0x1f5/0x520 [ 23.820873][ T297] ? __cfi_filename_lookup+0x10/0x10 [ 23.826162][ T297] do_linkat+0xcd/0x470 [ 23.830522][ T297] __x64_sys_link+0x86/0xa0 [ 23.835118][ T297] x64_sys_call+0x1cf5/0x2ee0 [ 23.839901][ T297] do_syscall_64+0x58/0xf0 [ 23.844317][ T297] ? clear_bhb_loop+0x50/0xa0 [ 23.849099][ T297] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 23.855151][ T297] RIP: 0033:0x7fdebf53e4f9 [ 23.859571][ T297] 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 [ 23.879348][ T297] RSP: 002b:00007fdebf4ec218 EFLAGS: 00000246 ORIG_RAX: 0000000000000056 [ 23.890112][ T297] RAX: ffffffffffffffda RBX: 00007fdebf5cb3e8 RCX: 00007fdebf53e4f9 [ 23.898098][ T297] RDX: 00007fdebf53e4f9 RSI: 0000000000000000 RDI: 0000200000000280 [ 23.906201][ T297] RBP: 00007fdebf5cb3e0 R08: 0000000000000000 R09: 0000000000000000 [ 23.914530][ T297] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdebf598034 [ 23.922516][ T297] R13: 0000200000008280 R14: 00007fdebf59600e R15: 0000200000000000 [ 23.930567][ T297] [ 23.933579][ T297] Modules linked in: [ 23.937594][ T297] ---[ end trace 0000000000000000 ]--- [ 23.943300][ T297] RIP: 0010:step_into+0x121/0xf50 [ 23.948533][ T297] Code: 74 24 08 c6 44 24 7f 00 43 0f b6 04 3c 84 c0 4d 89 fd 0f 85 10 0c 00 00 45 8b 36 4c 8b bc 24 a8 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 0f 0c 00 00 45 8b 3f 44 89 fe 81 e6 00 [ 23.968175][ T297] RSP: 0018:ffffc900012afa80 EFLAGS: 00010207 [ 23.974284][ T297] RAX: 0000000000000003 RBX: ffffc900012afcc0 RCX: ffff88812e1c9300 [ 23.982280][ T297] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.990343][ T297] RBP: ffffc900012afb98 R08: ffff88813401129f R09: 1ffff11026802253 [ 23.998404][ T297] R10: dffffc0000000000 R11: ffffed1026802254 R12: 1ffff92000255f9f [ 24.006406][ T297] R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000001d [ 24.014399][ T297] FS: 00007fdebf4ec6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 24.023482][ T297] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.030576][ T297] CR2: 000055da7b71b388 CR3: 0000000101f0e000 CR4: 00000000003526b0 [ 24.038574][ T297] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.046578][ T297] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.054637][ T297] Kernel panic - not syncing: Fatal exception [ 24.060854][ T297] Kernel Offset: disabled [ 24.065178][ T297] Rebooting in 86400 seconds..