./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3908507170 <...> Warning: Permanently added '10.128.10.7' (ECDSA) to the list of known hosts. execve("./syz-executor3908507170", ["./syz-executor3908507170"], 0x7ffe8741e0d0 /* 10 vars */) = 0 brk(NULL) = 0x555555ae5000 brk(0x555555ae5c40) = 0x555555ae5c40 arch_prctl(ARCH_SET_FS, 0x555555ae5300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 set_tid_address(0x555555ae55d0) = 288 set_robust_list(0x555555ae55e0, 24) = 0 rt_sigaction(SIGRTMIN, {sa_handler=0x7ff42c4c02b0, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7ff42c4c0980}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7ff42c4c0350, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7ff42c4c0980}, 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-executor3908507170", 4096) = 28 brk(0x555555b06c40) = 0x555555b06c40 brk(0x555555b07000) = 0x555555b07000 mprotect(0x7ff42c582000, 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(0x7ff42c5884cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7ff42c490000 mprotect(0x7ff42c491000, 131072, PROT_READ|PROT_WRITE) = 0 clone(child_stack=0x7ff42c4b03f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[289], tls=0x7ff42c4b0700, child_tidptr=0x7ff42c4b09d0) = 289 futex(0x7ff42c5884c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7ff42c5884cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 289 attached [pid 289] set_robust_list(0x7ff42c4b09e0, 24) = 0 [pid 289] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 289] futex(0x7ff42c5884cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7ff42c5884c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7ff42c5884cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 289] <... futex resumed>) = 1 [pid 289] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 289] futex(0x7ff42c5884cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7ff42c5884c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7ff42c5884cc, 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(0x7ff42c5884cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7ff42c5884c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7ff42c5884cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 289] <... futex resumed>) = 1 [pid 289] 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", 8192) = 56 [pid 289] 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 289] futex(0x7ff42c5884cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7ff42c5884c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7ff42c5884cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 289] <... futex resumed>) = 1 [ 23.000208][ T24] audit: type=1400 audit(1684075300.840:66): avc: denied { execmem } for pid=288 comm="syz-executor390" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.019556][ T24] audit: type=1400 audit(1684075300.840:67): avc: denied { read write } for pid=288 comm="syz-executor390" 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 289] mount(NULL, "./file0/file0/file0", NULL, 0, NULL [pid 288] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 288] futex(0x7ff42c5884dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7ff42c46f000 [pid 288] mprotect(0x7ff42c470000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 288] clone(child_stack=0x7ff42c48f3f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[291], tls=0x7ff42c48f700, child_tidptr=0x7ff42c48f9d0) = 291 [pid 288] futex(0x7ff42c5884d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7ff42c5884dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 291 attached [pid 291] set_robust_list(0x7ff42c48f9e0, 24) = 0 [pid 291] 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\x21\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8224) = 46 [pid 291] futex(0x7ff42c5884dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7ff42c5884d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7ff42c5884dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 291] <... futex resumed>) = 1 [ 23.043299][ T24] audit: type=1400 audit(1684075300.840:68): avc: denied { open } for pid=288 comm="syz-executor390" 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 [ 23.066750][ T24] audit: type=1400 audit(1684075300.840:69): avc: denied { mounton } for pid=288 comm="syz-executor390" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 23.071244][ T289] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 23.089656][ T24] audit: type=1400 audit(1684075300.850:70): avc: denied { mount } for pid=288 comm="syz-executor390" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 23.101162][ T289] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 23.101176][ T289] CPU: 0 PID: 289 Comm: syz-executor390 Not tainted 5.10.178-syzkaller-00127-g43c801dc3325 #0 [ 23.101183][ T289] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 [ 23.101214][ T289] RIP: 0010:step_into+0x1b9/0xec0 [ 23.101234][ T289] Code: 24 0f 85 cf 0a 00 00 44 8b 3a 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 56 a2 f3 ff 48 8b 9c 24 b8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 c1 0a 00 00 8b 1b 89 de 81 e6 00 00 07 [ 23.177741][ T289] RSP: 0018:ffffc90000b37820 EFLAGS: 00010202 [ 23.183637][ T289] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff888119fbcf00 [ 23.191708][ T289] RDX: ffffc90000b37c98 RSI: 0000000000000000 RDI: 0000000000000000 [pid 291] 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 291] futex(0x7ff42c5884dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 291] futex(0x7ff42c5884d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 288] <... futex resumed>) = 0 [pid 288] exit_group(0) = ? [pid 291] <... futex resumed>) = ? [ 23.200006][ T289] RBP: ffffc90000b37950 R08: ffffffff81b3ddff R09: ffffed102389f765 [ 23.208079][ T289] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000166f1b [ 23.215895][ T289] R13: dffffc0000000000 R14: ffffc90000b37c60 R15: 0000000000000011 [ 23.223876][ T289] FS: 00007ff42c4b0700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 23.232776][ T289] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.239321][ T289] CR2: 00007ff42c48f718 CR3: 000000011ee70000 CR4: 00000000003506b0 [pid 291] +++ exited with 0 +++ [ 23.247162][ T289] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.255318][ T289] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.263229][ T289] Call Trace: [ 23.266387][ T289] ? set_root+0x3d0/0x3d0 [ 23.270533][ T289] ? __kasan_check_write+0x14/0x20 [ 23.275463][ T289] ? up_read+0x14/0x90 [ 23.279382][ T289] walk_component+0x359/0x610 [ 23.283891][ T289] ? nd_alloc_stack+0xf0/0xf0 [ 23.288434][ T289] ? security_inode_permission+0xb0/0xf0 [ 23.294073][ T289] ? inode_permission+0xf1/0x500 [ 23.298951][ T289] ? fuse_do_getattr+0x7e0/0x7e0 [ 23.303845][ T289] link_path_walk+0x5c7/0xbd0 [ 23.308375][ T289] ? handle_lookup_down+0x130/0x130 [ 23.313393][ T289] path_lookupat+0xa0/0x450 [ 23.317754][ T289] filename_lookup+0x26a/0x6f0 [ 23.322349][ T289] ? hashlen_string+0x120/0x120 [ 23.327026][ T289] ? getname_flags+0x1fd/0x520 [ 23.331642][ T289] user_path_at_empty+0x40/0x50 [ 23.336307][ T289] __se_sys_mount+0x285/0x3b0 [ 23.340941][ T289] ? __x64_sys_mount+0xd0/0xd0 [ 23.345527][ T289] ? fpu__clear_all+0x20/0x20 [ 23.350036][ T289] __x64_sys_mount+0xbf/0xd0 [ 23.354466][ T289] do_syscall_64+0x34/0x70 [ 23.358806][ T289] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 23.364529][ T289] RIP: 0033:0x7ff42c4fe469 [ 23.368783][ T289] 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 [ 23.388406][ T289] RSP: 002b:00007ff42c4b02f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 23.396639][ T289] RAX: ffffffffffffffda RBX: 00007ff42c5884c0 RCX: 00007ff42c4fe469 [ 23.404883][ T289] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000 [ 23.412698][ T289] RBP: 00007ff42c55601c R08: 0000000000000000 R09: 0000000000000000 [ 23.420512][ T289] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 23.428326][ T289] R13: 0000000000000003 R14: 00007ff42c556038 R15: 00007ff42c5884c8 [ 23.436129][ T289] Modules linked in: [ 23.440185][ T289] ---[ end trace 009b08a013724605 ]--- [ 23.445460][ T289] RIP: 0010:step_into+0x1b9/0xec0 [ 23.450472][ T289] Code: 24 0f 85 cf 0a 00 00 44 8b 3a 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 56 a2 f3 ff 48 8b 9c 24 b8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 c1 0a 00 00 8b 1b 89 de 81 e6 00 00 07 [ 23.469879][ T289] RSP: 0018:ffffc90000b37820 EFLAGS: 00010202 [ 23.475762][ T289] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff888119fbcf00 [ 23.483658][ T289] RDX: ffffc90000b37c98 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.491507][ T289] RBP: ffffc90000b37950 R08: ffffffff81b3ddff R09: ffffed102389f765 [ 23.499313][ T289] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000166f1b [ 23.507234][ T289] R13: dffffc0000000000 R14: ffffc90000b37c60 R15: 0000000000000011 [ 23.514986][ T289] FS: 00007ff42c4b0700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 23.523850][ T289] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.530194][ T289] CR2: 00007ff42c48f718 CR3: 000000011ee70000 CR4: 00000000003506b0 [ 23.538397][ T289] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.546173][ T289] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.553941][ T289] Kernel panic - not syncing: Fatal exception [ 23.560281][ T289] Kernel Offset: disabled [ 23.564423][ T289] Rebooting in 86400 seconds..