./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor93529829 <...> Warning: Permanently added '10.128.1.148' (ECDSA) to the list of known hosts. execve("./syz-executor93529829", ["./syz-executor93529829"], 0x7fff146f4680 /* 10 vars */) = 0 brk(NULL) = 0x5555570bb000 brk(0x5555570bbc40) = 0x5555570bbc40 arch_prctl(ARCH_SET_FS, 0x5555570bb300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 set_tid_address(0x5555570bb5d0) = 292 set_robust_list(0x5555570bb5e0, 24) = 0 rt_sigaction(SIGRTMIN, {sa_handler=0x7f24c5e382b0, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7f24c5e38980}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f24c5e38350, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f24c5e38980}, 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-executor93529829", 4096) = 26 brk(0x5555570dcc40) = 0x5555570dcc40 brk(0x5555570dd000) = 0x5555570dd000 mprotect(0x7f24c5efa000, 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(0x7f24c5f004cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f24c5e08000 mprotect(0x7f24c5e09000, 131072, PROT_READ|PROT_WRITE) = 0 clone(child_stack=0x7f24c5e283f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[293], tls=0x7f24c5e28700, child_tidptr=0x7f24c5e289d0) = 293 futex(0x7f24c5f004c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f24c5f004cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 293 attached [pid 293] set_robust_list(0x7f24c5e289e0, 24) = 0 [pid 293] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 293] futex(0x7f24c5f004cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] <... futex resumed>) = 0 [pid 292] futex(0x7f24c5f004c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 292] futex(0x7f24c5f004cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 293] <... futex resumed>) = 1 [pid 293] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 293] futex(0x7f24c5f004cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] <... futex resumed>) = 0 [pid 292] futex(0x7f24c5f004c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 292] futex(0x7f24c5f004cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 293] <... futex resumed>) = 1 [pid 293] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=00000000000000000040000,user_id=00000000000000000000,group_id=0000000"...) = 0 [pid 293] futex(0x7f24c5f004cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] <... futex resumed>) = 0 [pid 292] futex(0x7f24c5f004c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 292] futex(0x7f24c5f004cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 293] <... futex resumed>) = 1 [pid 293] 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\xf3\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\x00\x00\x00\x00\x00\x00\x00\x00"..., 8192) = 104 [pid 293] 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 293] futex(0x7f24c5f004cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] <... futex resumed>) = 0 [pid 292] futex(0x7f24c5f004c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 292] futex(0x7f24c5f004cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 293] <... futex resumed>) = 1 [ 20.972434][ T30] audit: type=1400 audit(1684074593.676:66): avc: denied { execmem } for pid=292 comm="syz-executor935" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.980674][ T30] audit: type=1400 audit(1684074593.686:67): avc: denied { read write } for pid=292 comm="syz-executor935" 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 [ 20.989721][ T30] audit: type=1400 audit(1684074593.686:68): avc: denied { open } for pid=292 comm="syz-executor935" 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 293] mount(NULL, "./file0/file0/file0", NULL, 0, NULL [pid 292] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 292] futex(0x7f24c5f004dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 292] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f24c5de7000 [pid 292] mprotect(0x7f24c5de8000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 292] clone(child_stack=0x7f24c5e073f0, 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 295 attached , parent_tid=[295], tls=0x7f24c5e07700, child_tidptr=0x7f24c5e079d0) = 295 [pid 292] futex(0x7f24c5f004d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 292] futex(0x7f24c5f004dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 295] set_robust_list(0x7f24c5e079e0, 24) = 0 [pid 295] 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\x25\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8224) = 46 [pid 295] futex(0x7f24c5f004dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] <... futex resumed>) = 0 [pid 292] futex(0x7f24c5f004d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 292] futex(0x7f24c5f004dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 295] <... futex resumed>) = 1 [pid 295] 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 295] futex(0x7f24c5f004dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 295] futex(0x7f24c5f004d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 292] <... futex resumed>) = 0 [ 21.006938][ T30] audit: type=1400 audit(1684074593.686:69): avc: denied { mounton } for pid=292 comm="syz-executor935" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 21.029804][ T30] audit: type=1400 audit(1684074593.686:70): avc: denied { mount } for pid=292 comm="syz-executor935" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 21.053789][ T293] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 21.065442][ T293] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 21.073687][ T293] CPU: 0 PID: 293 Comm: syz-executor935 Not tainted 5.15.106-syzkaller-00249-g19c0ed55a470 #0 [ 21.083751][ T293] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 [ 21.093649][ T293] RIP: 0010:step_into+0x1b6/0xe70 [ 21.098508][ T293] Code: 20 0f 85 99 0a 00 00 44 8b 3b 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 e9 d0 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 86 0a 00 00 8b 1b 89 de 81 e6 00 00 07 [pid 292] exit_group(0) = ? [pid 295] <... futex resumed>) = ? [pid 295] +++ exited with 0 +++ [ 21.117956][ T293] RSP: 0018:ffffc900009477e0 EFLAGS: 00010202 [ 21.123864][ T293] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88811f8f4f00 [ 21.131669][ T293] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 21.139471][ T293] RBP: ffffc90000947910 R08: ffffffff81bd6190 R09: ffffed10238a8815 [ 21.147285][ T293] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000128f13 [ 21.155094][ T293] R13: dffffc0000000000 R14: ffffc90000947c40 R15: 0000000000000011 [ 21.162908][ T293] FS: 00007f24c5e28700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 21.171682][ T293] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.178100][ T293] CR2: 000055574c5c4048 CR3: 000000011ed2e000 CR4: 00000000003506b0 [ 21.185908][ T293] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.193718][ T293] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.201529][ T293] Call Trace: [ 21.204654][ T293] [ 21.207435][ T293] ? set_root+0x400/0x400 [ 21.211598][ T293] ? up_read+0x5a/0x180 [ 21.215877][ T293] walk_component+0x359/0x610 [ 21.220389][ T293] ? nd_alloc_stack+0xf0/0xf0 [ 21.224898][ T293] ? security_inode_permission+0xb0/0xf0 [ 21.230373][ T293] ? fuse_do_getattr+0x7e0/0x7e0 [ 21.235143][ T293] link_path_walk+0x642/0xd90 [ 21.239659][ T293] ? handle_lookup_down+0x130/0x130 [ 21.244689][ T293] path_lookupat+0xa0/0x450 [ 21.249028][ T293] filename_lookup+0x230/0x5c0 [ 21.253640][ T293] ? hashlen_string+0x120/0x120 [ 21.258323][ T293] ? getname_flags+0x1fd/0x520 [ 21.262918][ T293] user_path_at_empty+0x43/0x1a0 [ 21.267688][ T293] __se_sys_mount+0x285/0x3b0 [ 21.272202][ T293] ? __x64_sys_mount+0xd0/0xd0 [ 21.276801][ T293] ? __kasan_check_read+0x11/0x20 [ 21.281664][ T293] __x64_sys_mount+0xbf/0xd0 [ 21.286089][ T293] do_syscall_64+0x3d/0xb0 [ 21.290341][ T293] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 21.296072][ T293] RIP: 0033:0x7f24c5e76469 [ 21.300326][ T293] 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 [ 21.319772][ T293] RSP: 002b:00007f24c5e282f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 21.328010][ T293] RAX: ffffffffffffffda RBX: 00007f24c5f004c0 RCX: 00007f24c5e76469 [ 21.335820][ T293] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000 [ 21.343639][ T293] RBP: 00007f24c5ece01c R08: 0000000000000000 R09: 0000000000000000 [ 21.351453][ T293] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 21.359257][ T293] R13: 0000000000000003 R14: 00007f24c5ece038 R15: 00007f24c5f004c8 [ 21.367072][ T293] [ 21.369930][ T293] Modules linked in: [ 21.373867][ T293] ---[ end trace 9d35e28895beda48 ]--- [ 21.379178][ T293] RIP: 0010:step_into+0x1b6/0xe70 [ 21.383993][ T293] Code: 20 0f 85 99 0a 00 00 44 8b 3b 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 e9 d0 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 86 0a 00 00 8b 1b 89 de 81 e6 00 00 07 [ 21.403473][ T293] RSP: 0018:ffffc900009477e0 EFLAGS: 00010202 [ 21.409358][ T293] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88811f8f4f00 [ 21.417171][ T293] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 21.424965][ T293] RBP: ffffc90000947910 R08: ffffffff81bd6190 R09: ffffed10238a8815 [ 21.432933][ T293] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000128f13 [ 21.440717][ T293] R13: dffffc0000000000 R14: ffffc90000947c40 R15: 0000000000000011 [ 21.448532][ T293] FS: 00007f24c5e28700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 21.457292][ T293] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.463697][ T293] CR2: 000055574c5c4048 CR3: 000000011ed2e000 CR4: 00000000003506b0 [ 21.471553][ T293] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.479337][ T293] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.487161][ T293] Kernel panic - not syncing: Fatal exception [ 21.493203][ T293] Kernel Offset: disabled [ 21.497686][ T293] Rebooting in 86400 seconds..