./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1785798672 <...> Warning: Permanently added '10.128.0.131' (ED25519) to the list of known hosts. execve("./syz-executor1785798672", ["./syz-executor1785798672"], 0x7fff33dc46d0 /* 10 vars */) = 0 brk(NULL) = 0x5555824d8000 brk(0x5555824d8d40) = 0x5555824d8d40 arch_prctl(ARCH_SET_FS, 0x5555824d83c0) = 0 set_tid_address(0x5555824d8690) = 288 set_robust_list(0x5555824d86a0, 24) = 0 rseq(0x5555824d8ce0, 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-executor1785798672", 4096) = 28 getrandom("\x8e\x1a\xfd\xcd\x91\x84\xf9\x3e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555824d8d40 brk(0x5555824f9d40) = 0x5555824f9d40 brk(0x5555824fa000) = 0x5555824fa000 mprotect(0x7fa02e681000, 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, 0executing program ) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 write(1, "executing program\n", 18) = 18 futex(0x7fa02e6873ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7fa02e620320, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fa02e6119a0}, 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) = 0x7fa02e59c000 mprotect(0x7fa02e59d000, 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=0x7fa02e5bc990, parent_tid=0x7fa02e5bc990, exit_signal=0, stack=0x7fa02e59c000, stack_size=0x20300, tls=0x7fa02e5bc6c0} => {parent_tid=[289]}, 88) = 289 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7fa02e6873e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7fa02e6873ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 289 attached [pid 289] set_robust_list(0x7fa02e5bc9a0, 24) = 0 [pid 289] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 289] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 289] futex(0x7fa02e6873ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7fa02e6873e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7fa02e6873ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 289] <... futex resumed>) = 1 [pid 289] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 289] futex(0x7fa02e6873ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7fa02e6873e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7fa02e6873ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 289] <... futex resumed>) = 1 [pid 289] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=00000000000000000040000,user_id=00000000000000000000,group_id=0000000"...) = 0 [pid 289] futex(0x7fa02e6873ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7fa02e6873e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7fa02e6873ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 289] <... futex resumed>) = 1 [pid 289] 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\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 289] futex(0x7fa02e6873ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7fa02e6873e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7fa02e6873ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 289] <... futex resumed>) = 1 [ 24.017365][ T30] audit: type=1400 audit(1750316390.176:64): avc: denied { execmem } for pid=288 comm="syz-executor178" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.040421][ T30] audit: type=1400 audit(1750316390.176:65): avc: denied { read write } for pid=288 comm="syz-executor178" 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 289] read(3, [pid 288] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 288] futex(0x7fa02e6873fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fa02e57b000 [pid 288] mprotect(0x7fa02e57c000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 288] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 288] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fa02e59b990, parent_tid=0x7fa02e59b990, exit_signal=0, stack=0x7fa02e57b000, stack_size=0x20300, tls=0x7fa02e59b6c0} => {parent_tid=[291]}, 88) = 291 [pid 288] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 288] futex(0x7fa02e6873f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7fa02e6873fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 291 attached [pid 291] set_robust_list(0x7fa02e59b9a0, 24) = 0 [pid 291] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 291] write(3, "\x18\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x00\x00\x00\x00", 24) = 24 [pid 291] futex(0x7fa02e6873fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7fa02e6873f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7fa02e6873fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 291] <... futex resumed>) = 1 [ 24.066635][ T30] audit: type=1400 audit(1750316390.176:66): avc: denied { open } for pid=288 comm="syz-executor178" 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 [pid 291] unlink("./file0/file0" [pid 289] <... 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\x23\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8192) = 46 [pid 289] write(3, "\x90\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 289] futex(0x7fa02e6873ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 24.095252][ T30] audit: type=1400 audit(1750316390.176:67): avc: denied { mounton } for pid=288 comm="syz-executor178" path="/root/file0" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 24.095786][ T291] general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] PREEMPT SMP KASAN [ 24.121051][ T30] audit: type=1400 audit(1750316390.176:68): avc: denied { mount } for pid=288 comm="syz-executor178" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 24.132253][ T291] KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f] [ 24.132273][ T291] CPU: 0 PID: 291 Comm: syz-executor178 Not tainted 5.15.185-syzkaller-00339-ge678c93d43cc #0 [ 24.132293][ T291] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 24.132305][ T291] RIP: 0010:do_unlinkat+0x27d/0x6b0 [ 24.157134][ T30] audit: type=1400 audit(1750316390.246:69): avc: denied { read } for pid=83 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 [ 24.167467][ T291] Code: 44 89 ee e8 65 d2 b6 ff 45 31 e4 41 81 fd 00 00 20 00 41 0f 95 c4 41 83 c4 eb e9 bd 00 00 00 49 8d 7e 30 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 4c 8b 7c 24 18 74 05 e8 52 40 f5 ff 49 8b 46 30 48 [ 24.167493][ T291] RSP: 0018:ffffc900009b7e00 EFLAGS: 00010202 [ 24.167527][ T291] RAX: 0000000000000007 RBX: 1ffff1102433a06c RCX: ffff888104d8e2c0 [ 24.179890][ T30] audit: type=1400 audit(1750316390.246:70): avc: denied { search } for pid=83 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 [ 24.193492][ T291] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000038 [ 24.193515][ T291] RBP: ffffc900009b7ee8 R08: dffffc0000000000 R09: ffffed102433a072 [ 24.193529][ T291] R10: ffffed102433a072 R11: 1ffff1102433a071 R12: 0000000000000000 [ 24.193542][ T291] R13: dffffc0000000000 R14: 0000000000000008 R15: 0000000000000000 [ 24.193555][ T291] FS: 00007fa02e59b6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 24.201648][ T30] audit: type=1400 audit(1750316390.246:71): avc: denied { write } for pid=83 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 [ 24.230509][ T291] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.230534][ T291] CR2: 00007fa02e59bd58 CR3: 000000011efc4000 CR4: 00000000003506b0 [ 24.230551][ T291] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.230563][ T291] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.230576][ T291] Call Trace: [ 24.253974][ T30] audit: type=1400 audit(1750316390.246:72): avc: denied { add_name } for pid=83 comm="syslogd" name="messages" scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 24.260371][ T291] [ 24.260383][ T291] ? fsnotify_link_count+0x100/0x100 [ 24.260424][ T291] ? getname_flags+0x206/0x500 [ 24.270302][ T30] audit: type=1400 audit(1750316390.246:73): avc: denied { create } for pid=83 comm="syslogd" name="messages" scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 24.297816][ T291] __x64_sys_unlink+0x49/0x50 [ 24.297852][ T291] x64_sys_call+0x878/0x9a0 [ 24.297872][ T291] do_syscall_64+0x4c/0xa0 [ 24.476928][ T291] ? clear_bhb_loop+0x50/0xa0 [ 24.481652][ T291] ? clear_bhb_loop+0x50/0xa0 [ 24.486595][ T291] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 24.493551][ T291] RIP: 0033:0x7fa02e5fa479 [ 24.498479][ T291] 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 [ 24.518706][ T291] RSP: 002b:00007fa02e59b218 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [ 24.527481][ T291] RAX: ffffffffffffffda RBX: 00007fa02e6873f8 RCX: 00007fa02e5fa479 [ 24.535524][ T291] RDX: 00007fa02e5fa479 RSI: 00000000000f4240 RDI: 0000200000000100 [ 24.543803][ T291] RBP: 00007fa02e6873f0 R08: 0000000000000000 R09: 0000000000000000 [ 24.551986][ T291] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa02e654034 [ 24.559975][ T291] R13: 0000200000004300 R14: 0000200000000100 R15: 00007ffe7b8b3ff8 [pid 289] futex(0x7fa02e6873e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 288] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [ 24.567966][ T291] [ 24.571246][ T291] Modules linked in: [ 24.576248][ T291] ---[ end trace ff6bd4ecdd5d9d35 ]--- [ 24.582030][ T291] RIP: 0010:do_unlinkat+0x27d/0x6b0 [ 24.587339][ T291] Code: 44 89 ee e8 65 d2 b6 ff 45 31 e4 41 81 fd 00 00 20 00 41 0f 95 c4 41 83 c4 eb e9 bd 00 00 00 49 8d 7e 30 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 4c 8b 7c 24 18 74 05 e8 52 40 f5 ff 49 8b 46 30 48 [ 24.609215][ T291] RSP: 0018:ffffc900009b7e00 EFLAGS: 00010202 [ 24.615709][ T291] RAX: 0000000000000007 RBX: 1ffff1102433a06c RCX: ffff888104d8e2c0 [ 24.624646][ T291] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000038 [ 24.633782][ T291] RBP: ffffc900009b7ee8 R08: dffffc0000000000 R09: ffffed102433a072 [ 24.642091][ T291] R10: ffffed102433a072 R11: 1ffff1102433a071 R12: 0000000000000000 [ 24.650533][ T291] R13: dffffc0000000000 R14: 0000000000000008 R15: 0000000000000000 [ 24.659079][ T291] FS: 00007fa02e59b6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [pid 288] exit_group(0 [pid 289] <... futex resumed>) = ? [pid 289] +++ exited with 0 +++ [pid 288] <... exit_group resumed>) = ? [ 24.668621][ T291] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.675562][ T291] CR2: 00007fa02e59bd58 CR3: 000000011efc4000 CR4: 00000000003506b0 [ 24.684854][ T291] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.693682][ T291] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.701799][ T291] Kernel panic - not syncing: Fatal exception [ 24.708553][ T291] Kernel Offset: disabled [ 24.713109][ T291] Rebooting in 86400 seconds..