./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2575737446 <...> Warning: Permanently added '10.128.1.81' (ED25519) to the list of known hosts. execve("./syz-executor2575737446", ["./syz-executor2575737446"], 0x7ffd030967e0 /* 10 vars */) = 0 brk(NULL) = 0x555555971000 brk(0x555555971d40) = 0x555555971d40 arch_prctl(ARCH_SET_FS, 0x5555559713c0) = 0 set_tid_address(0x555555971690) = 286 set_robust_list(0x5555559716a0, 24) = 0 rseq(0x555555971ce0, 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-executor2575737446", 4096) = 28 getrandom("\xdd\xe9\x17\xd7\x70\x14\x0f\x19", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555971d40 brk(0x555555992d40) = 0x555555992d40 brk(0x555555993000) = 0x555555993000 mprotect(0x7f207996f000, 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 getpid() = 286 openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC) = 3 write(3, "10000000000", 11) = 11 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 write(3, "20", 2) = 2 close(3) = 0 openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 write(3, "100", 3) = 3 close(3) = 0 openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 write(3, "7 4 1 3", 7) = 7 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 write(3, "286", 3) = 3 close(3) = 0 futex(0x7f207997540c, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f2079916190, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f2079907fa0}, 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) = 0x7f207988a000 mprotect(0x7f207988b000, 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=0x7f20798aa990, parent_tid=0x7f20798aa990, exit_signal=0, stack=0x7f207988a000, stack_size=0x20300, tls=0x7f20798aa6c0} => {parent_tid=[287]}, 88) = 287 ./strace-static-x86_64: Process 287 attached [pid 286] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 286] futex(0x7f2079975408, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 286] futex(0x7f207997540c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 287] set_robust_list(0x7f20798aa9a0, 24) = 0 [pid 287] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 287] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 287] futex(0x7f207997540c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 287] futex(0x7f2079975408, FUTEX_WAIT_PRIVATE, 0, NULL [pid 286] <... futex resumed>) = 0 [pid 286] futex(0x7f2079975408, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 287] <... futex resumed>) = 0 [pid 286] futex(0x7f207997540c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 287] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 287] futex(0x7f207997540c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 287] futex(0x7f2079975408, FUTEX_WAIT_PRIVATE, 0, NULL [pid 286] <... futex resumed>) = 0 [pid 286] futex(0x7f2079975408, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 287] <... futex resumed>) = 0 [pid 286] futex(0x7f207997540c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 287] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=00000000000000000040000,user_id=00000000000000000000,group_id=0000000"...) = 0 [pid 287] futex(0x7f207997540c, FUTEX_WAKE_PRIVATE, 1000000 [pid 286] <... futex resumed>) = 0 [pid 286] futex(0x7f2079975408, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 286] futex(0x7f207997540c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 287] <... futex resumed>) = 1 [pid 287] 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 287] futex(0x7f207997540c, FUTEX_WAKE_PRIVATE, 1000000 [pid 286] <... futex resumed>) = 0 [pid 286] futex(0x7f2079975408, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 286] futex(0x7f207997540c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 287] <... futex resumed>) = 1 [ 20.352582][ T24] audit: type=1400 audit(1694668031.490:66): avc: denied { execmem } for pid=286 comm="syz-executor257" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.366352][ T24] audit: type=1400 audit(1694668031.500:67): avc: denied { read write } for pid=286 comm="syz-executor257" 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 [ 20.376390][ T24] audit: type=1400 audit(1694668031.500:68): avc: denied { open } for pid=286 comm="syz-executor257" 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 [pid 287] openat(AT_FDCWD, "./file0/file0", O_RDONLY [pid 286] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 286] futex(0x7f207997540c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 286] futex(0x7f207997541c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 286] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f2079869000 [pid 286] mprotect(0x7f207986a000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 286] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 286] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f2079889990, parent_tid=0x7f2079889990, exit_signal=0, stack=0x7f2079869000, stack_size=0x20300, tls=0x7f20798896c0} => {parent_tid=[289]}, 88) = 289 [pid 286] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 286] futex(0x7f2079975418, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 286] futex(0x7f207997541c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 289 attached [pid 289] set_robust_list(0x7f20798899a0, 24) = 0 [pid 289] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 289] write(3, "\x50\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x07\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", 80) = 80 [pid 289] futex(0x7f207997541c, FUTEX_WAKE_PRIVATE, 1000000 [pid 286] <... futex resumed>) = 0 [pid 286] futex(0x7f2079975418, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 286] futex(0x7f207997541c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 289] <... futex resumed>) = 1 [pid 289] 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\x1f\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\x01\x00\x00\x00\x00\x00\x00\x00\x06\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\x01\x00\x00\x80\x09\x00\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x01\x04\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x08\x00\x00\x00\x00\x00\x00\x00\x06\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00"..., 144) = 144 [pid 289] futex(0x7f207997541c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 289] futex(0x7f2079975418, FUTEX_WAIT_PRIVATE, 0, NULL [pid 286] <... futex resumed>) = 0 [ 20.399635][ T24] audit: type=1400 audit(1694668031.500:69): avc: denied { mounton } for pid=286 comm="syz-executor257" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 20.423392][ T24] audit: type=1400 audit(1694668031.500:70): avc: denied { mount } for pid=286 comm="syz-executor257" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 20.426571][ T287] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN [ 20.456796][ T287] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 20.465117][ T287] CPU: 0 PID: 287 Comm: syz-executor257 Not tainted 5.10.194-syzkaller-00508-ga27512601c2d #0 [ 20.475189][ T287] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 [ 20.485096][ T287] RIP: 0010:path_openat+0x17ab/0x3000 [ 20.490375][ T287] Code: b6 04 30 84 c0 0f 85 d9 07 00 00 48 8b 44 24 30 80 60 01 f8 e9 69 ee ff ff e8 31 28 b7 ff 4c 8b 64 24 20 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 8f 07 00 00 41 8b 1f be 00 00 70 00 21 [ 20.509826][ T287] RSP: 0018:ffffc90000b27920 EFLAGS: 00010202 [ 20.515711][ T287] RAX: 0000000000000001 RBX: ffff88811eb3b818 RCX: ffff88811ea42780 [ 20.523525][ T287] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000 [ 20.531339][ T287] RBP: ffffc90000b27b50 R08: ffffffff81b62ffb R09: ffffed10239002fa [ 20.539149][ T287] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811c8017a0 [pid 286] exit_group(0) = ? [pid 289] <... futex resumed>) = ? [pid 289] +++ exited with 0 +++ [ 20.546966][ T287] R13: 0000000000008000 R14: dffffc0000000000 R15: 0000000000000008 [ 20.554769][ T287] FS: 00007f20798aa6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 20.563544][ T287] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.570137][ T287] CR2: 0000000020001000 CR3: 000000011e01c000 CR4: 00000000003506b0 [ 20.578037][ T287] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.585837][ T287] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.593642][ T287] Call Trace: [ 20.596789][ T287] ? __die_body+0x62/0xb0 [ 20.600946][ T287] ? die_addr+0x9f/0xd0 [ 20.604940][ T287] ? exc_general_protection+0x3ff/0x490 [ 20.610338][ T287] ? asm_exc_general_protection+0x1e/0x30 [ 20.615879][ T287] ? dput+0x8b/0x310 [ 20.619615][ T287] ? path_openat+0x17ab/0x3000 [ 20.624209][ T287] ? update_load_avg+0x541/0x1690 [ 20.629075][ T287] ? do_filp_open+0x460/0x460 [ 20.633597][ T287] do_filp_open+0x21c/0x460 [ 20.637928][ T287] ? vfs_tmpfile+0x2b0/0x2b0 [ 20.642354][ T287] ? get_unused_fd_flags+0x94/0xa0 [ 20.647298][ T287] do_sys_openat2+0x13f/0x6f0 [ 20.651809][ T287] ? cgroup_leave_frozen+0x164/0x2c0 [ 20.656926][ T287] ? ptrace_stop+0x6dc/0xa30 [ 20.661353][ T287] ? do_sys_open+0x220/0x220 [ 20.665780][ T287] ? _raw_spin_unlock_irq+0x4e/0x70 [ 20.670814][ T287] ? ptrace_notify+0x24c/0x350 [ 20.675410][ T287] __x64_sys_openat+0x243/0x290 [ 20.680100][ T287] ? __ia32_sys_open+0x270/0x270 [ 20.684871][ T287] ? irqentry_exit_to_user_mode+0x4d/0x80 [ 20.690428][ T287] ? syscall_enter_from_user_mode+0x57/0x1a0 [ 20.696332][ T287] do_syscall_64+0x34/0x70 [ 20.700586][ T287] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 20.706307][ T287] RIP: 0033:0x7f20798f05f9 [ 20.710576][ T287] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 1a 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 [ 20.730010][ T287] RSP: 002b:00007f20798aa218 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 20.738246][ T287] RAX: ffffffffffffffda RBX: 00007f2079975408 RCX: 00007f20798f05f9 [ 20.746059][ T287] RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c [ 20.753869][ T287] RBP: 00007f2079975400 R08: 0000000000000000 R09: 0000000000000000 [ 20.761684][ T287] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f20799420d4 [ 20.769493][ T287] R13: 00007f20799420f0 R14: 00007f2079940016 R15: 2f30656c69662f2e [ 20.777301][ T287] Modules linked in: [ 20.781156][ T287] ---[ end trace 1f3c36300e805113 ]--- [ 20.786347][ T287] RIP: 0010:path_openat+0x17ab/0x3000 [ 20.791751][ T287] Code: b6 04 30 84 c0 0f 85 d9 07 00 00 48 8b 44 24 30 80 60 01 f8 e9 69 ee ff ff e8 31 28 b7 ff 4c 8b 64 24 20 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 8f 07 00 00 41 8b 1f be 00 00 70 00 21 [ 20.811188][ T287] RSP: 0018:ffffc90000b27920 EFLAGS: 00010202 [ 20.817072][ T287] RAX: 0000000000000001 RBX: ffff88811eb3b818 RCX: ffff88811ea42780 [ 20.824870][ T287] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000 [ 20.832735][ T287] RBP: ffffc90000b27b50 R08: ffffffff81b62ffb R09: ffffed10239002fa [ 20.840548][ T287] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811c8017a0 [ 20.848436][ T287] R13: 0000000000008000 R14: dffffc0000000000 R15: 0000000000000008 [ 20.856205][ T287] FS: 00007f20798aa6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 20.865001][ T287] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.871414][ T287] CR2: 0000000020001000 CR3: 000000011e01c000 CR4: 00000000003506b0 [ 20.879235][ T287] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.887031][ T287] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.894819][ T287] Kernel panic - not syncing: Fatal exception [ 20.900943][ T287] Kernel Offset: disabled [ 20.905071][ T287] Rebooting in 86400 seconds..