./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2852580524 <...> Warning: Permanently added '10.128.10.22' (ECDSA) to the list of known hosts. execve("./syz-executor2852580524", ["./syz-executor2852580524"], 0x7ffc86c81830 /* 10 vars */) = 0 brk(NULL) = 0x555556a3d000 brk(0x555556a3dc40) = 0x555556a3dc40 arch_prctl(ARCH_SET_FS, 0x555556a3d300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 set_tid_address(0x555556a3d5d0) = 291 set_robust_list(0x555556a3d5e0, 24) = 0 rt_sigaction(SIGRTMIN, {sa_handler=0x7f3a872ad2b0, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7f3a872ad980}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f3a872ad350, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3a872ad980}, NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2852580524", 4096) = 28 brk(0x555556a5ec40) = 0x555556a5ec40 brk(0x555556a5f000) = 0x555556a5f000 mprotect(0x7f3a8736f000, 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 futex(0x7f3a873754cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3a8727d000 mprotect(0x7f3a8727e000, 131072, PROT_READ|PROT_WRITE) = 0 clone(child_stack=0x7f3a8729d3f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[292], tls=0x7f3a8729d700, child_tidptr=0x7f3a8729d9d0) = 292 futex(0x7f3a873754c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f3a873754cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 292 attached [pid 292] set_robust_list(0x7f3a8729d9e0, 24) = 0 [pid 292] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 292] futex(0x7f3a873754cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 291] futex(0x7f3a873754c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7f3a873754cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] <... futex resumed>) = 1 [pid 292] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 292] futex(0x7f3a873754cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 291] futex(0x7f3a873754c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7f3a873754cc, 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(0x7f3a873754cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 291] futex(0x7f3a873754c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7f3a873754cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] <... futex resumed>) = 1 [pid 292] 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\x25\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"..., 8192) = 104 [pid 292] write(3, "\x50\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x26\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 292] futex(0x7f3a873754cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 291] futex(0x7f3a873754c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7f3a873754cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] <... futex resumed>) = 1 [ 20.528107][ T28] audit: type=1400 audit(1684074594.224:66): avc: denied { execmem } for pid=291 comm="syz-executor285" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.534726][ T28] audit: type=1400 audit(1684074594.234:67): avc: denied { read write } for pid=291 comm="syz-executor285" name="fuse" dev="devtmpfs" ino=92 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [ 20.543647][ T28] audit: type=1400 audit(1684074594.234:68): avc: denied { open } for pid=291 comm="syz-executor285" path="/dev/fuse" dev="devtmpfs" ino=92 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [pid 292] mount(NULL, "./file0/file0/file0", NULL, 0, NULL [pid 291] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 291] futex(0x7f3a873754dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3a8725c000 [pid 291] mprotect(0x7f3a8725d000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 291] clone(child_stack=0x7f3a8727c3f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 294 attached , parent_tid=[294], tls=0x7f3a8727c700, child_tidptr=0x7f3a8727c9d0) = 294 [pid 291] futex(0x7f3a873754d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7f3a873754dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] set_robust_list(0x7f3a8727c9e0, 24) = 0 [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", 8224) = 46 [pid 294] futex(0x7f3a873754dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 291] futex(0x7f3a873754d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7f3a873754dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] <... futex resumed>) = 1 [pid 294] write(3, "\xa0\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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 160) = 160 [pid 294] futex(0x7f3a873754dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 294] <... futex resumed>) = 1 [ 20.557734][ T28] audit: type=1400 audit(1684074594.234:69): avc: denied { mounton } for pid=291 comm="syz-executor285" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 20.581076][ T28] audit: type=1400 audit(1684074594.234:70): avc: denied { mount } for pid=291 comm="syz-executor285" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 20.605060][ T292] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 20.616604][ T292] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 20.624846][ T292] CPU: 0 PID: 292 Comm: syz-executor285 Not tainted 6.1.25-syzkaller-00149-g6f4553626dbd #0 [ 20.634741][ T292] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 [ 20.644653][ T292] RIP: 0010:step_into+0x1c4/0x1090 [ 20.649581][ T292] Code: c0 0f 85 bb 0b 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 10 e8 5b 23 f3 ff 48 8b 9c 24 d8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 a8 0b 00 00 8b 1b 89 de 81 e6 00 00 07 [ 20.669023][ T292] RSP: 0018:ffffc90000dc78a0 EFLAGS: 00010202 [ 20.674924][ T292] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88810f144c00 [ 20.682735][ T292] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 20.690634][ T292] RBP: ffffc90000dc79f0 R08: ffffffff81c5d769 R09: ffffed1021dddf15 [ 20.698444][ T292] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001b8f2f [ 20.706256][ T292] R13: ffffc90000dc7c20 R14: dffffc0000000000 R15: 0000000000000011 [ 20.714067][ T292] FS: 00007f3a8729d700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 20.722834][ T292] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.729257][ T292] CR2: 00007f3a8727c718 CR3: 000000012028d000 CR4: 00000000003506b0 [ 20.737068][ T292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.744877][ T292] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.752691][ T292] Call Trace: [ 20.755813][ T292] [ 20.758592][ T292] ? __lookup_slow+0x36e/0x3e0 [ 20.763191][ T292] ? lookup_one_len+0x2c0/0x2c0 [ 20.767879][ T292] ? set_root+0x400/0x400 [ 20.772047][ T292] ? up_read+0x5a/0x180 [ 20.776040][ T292] link_path_walk+0x72c/0xee0 [ 20.780570][ T292] ? handle_lookup_down+0x130/0x130 [ 20.785587][ T292] path_lookupat+0xa0/0x450 [ 20.789928][ T292] filename_lookup+0x251/0x600 [ 20.794531][ T292] ? hashlen_string+0x120/0x120 [ 20.799216][ T292] ? strncpy_from_user+0x169/0x2b0 [ 20.804175][ T292] ? getname_flags+0x1fd/0x520 [ 20.808758][ T292] user_path_at_empty+0x43/0x1a0 [ 20.813532][ T292] __se_sys_mount+0x285/0x3b0 [ 20.818045][ T292] ? __x64_sys_mount+0xd0/0xd0 [ 20.822665][ T292] ? fpregs_restore_userregs+0x130/0x290 [ 20.828116][ T292] __x64_sys_mount+0xbf/0xd0 [ 20.832540][ T292] do_syscall_64+0x3d/0xb0 [ 20.837029][ T292] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 20.842759][ T292] RIP: 0033:0x7f3a872eb469 [ 20.847013][ T292] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 14 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 b8 ff ff ff f7 d8 64 89 01 48 [ 20.866453][ T292] RSP: 002b:00007f3a8729d2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 20.874702][ T292] RAX: ffffffffffffffda RBX: 00007f3a873754c0 RCX: 00007f3a872eb469 [ 20.882508][ T292] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000 [ 20.890317][ T292] RBP: 00007f3a8734301c R08: 0000000000000000 R09: 0000000000000000 [ 20.898132][ T292] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 20.905941][ T292] R13: 0000000000000003 R14: 00007f3a87343038 R15: 00007f3a873754c8 [ 20.913757][ T292] [ 20.916617][ T292] Modules linked in: [ 20.920587][ T292] ---[ end trace 0000000000000000 ]--- [ 20.925859][ T292] RIP: 0010:step_into+0x1c4/0x1090 [ 20.930827][ T292] Code: c0 0f 85 bb 0b 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 10 e8 5b 23 f3 ff 48 8b 9c 24 d8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 a8 0b 00 00 8b 1b 89 de 81 e6 00 00 07 [ 20.950294][ T292] RSP: 0018:ffffc90000dc78a0 EFLAGS: 00010202 [ 20.956280][ T292] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88810f144c00 [ 20.964093][ T292] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 20.972252][ T292] RBP: ffffc90000dc79f0 R08: ffffffff81c5d769 R09: ffffed1021dddf15 [ 20.980199][ T292] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001b8f2f [ 20.988037][ T292] R13: ffffc90000dc7c20 R14: dffffc0000000000 R15: 0000000000000011 [ 20.995869][ T292] FS: 00007f3a8729d700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 21.004997][ T292] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.011481][ T292] CR2: 00007f3a8727c718 CR3: 000000012028d000 CR4: 00000000003506b0 [ 21.019275][ T292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.027115][ T292] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.034933][ T292] Kernel panic - not syncing: Fatal exception [ 21.040978][ T292] Kernel Offset: disabled [ 21.045122][ T292] Rebooting in 86400 seconds..