./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor55935387 <...> Warning: Permanently added '10.128.0.112' (ED25519) to the list of known hosts. execve("./syz-executor55935387", ["./syz-executor55935387"], 0x7ffc7108e060 /* 10 vars */) = 0 brk(NULL) = 0x555556920000 brk(0x555556920d40) = 0x555556920d40 arch_prctl(ARCH_SET_FS, 0x5555569203c0) = 0 set_tid_address(0x555556920690) = 289 set_robust_list(0x5555569206a0, 24) = 0 rseq(0x555556920ce0, 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-executor55935387", 4096) = 26 getrandom("\xe2\xd0\x3b\x4a\x68\x9d\x41\xe0", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556920d40 brk(0x555556941d40) = 0x555556941d40 brk(0x555556942000) = 0x555556942000 mprotect(0x7f85df007000, 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(0x7f85df00d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f85defa9160, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f85def9a7e0}, 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) = 0x7f85def25000 mprotect(0x7f85def26000, 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=0x7f85def45990, parent_tid=0x7f85def45990, exit_signal=0, stack=0x7f85def25000, stack_size=0x20300, tls=0x7f85def456c0} => {parent_tid=[290]}, 88) = 290 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7f85df00d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f85df00d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 290 attached [pid 290] set_robust_list(0x7f85def459a0, 24) = 0 [pid 290] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 290] mkdir("./file0", 000) = 0 [pid 290] futex(0x7f85df00d3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7f85df00d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7f85df00d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 290] <... futex resumed>) = 1 [pid 290] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 290] futex(0x7f85df00d3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7f85df00d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7f85df00d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 290] <... futex resumed>) = 1 [pid 290] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=0000000000000000040000,user_id=00000000000000000000,group_id=00000000"...) = 0 [pid 290] futex(0x7f85df00d3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7f85df00d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7f85df00d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 290] <... futex resumed>) = 1 [pid 290] 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 290] futex(0x7f85df00d3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7f85df00d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7f85df00d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 290] <... futex resumed>) = 1 [ 23.235292][ T24] audit: type=1400 audit(1708637567.470:66): avc: denied { execmem } for pid=289 comm="syz-executor559" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.254623][ T24] audit: type=1400 audit(1708637567.480:67): avc: denied { read write } for pid=289 comm="syz-executor559" 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 290] mount(NULL, "./file0/../file0/file0/file0", NULL, 0, NULL [pid 289] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 289] futex(0x7f85df00d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f85def04000 [pid 289] mprotect(0x7f85def05000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 289] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 289] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f85def24990, parent_tid=0x7f85def24990, exit_signal=0, stack=0x7f85def04000, stack_size=0x20300, tls=0x7f85def246c0} => {parent_tid=[292]}, 88) = 292 [pid 289] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 289] futex(0x7f85df00d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7f85df00d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 292 attached [pid 292] set_robust_list(0x7f85def249a0, 24) = 0 [pid 292] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 292] write(3, "\x50\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x27\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7f85df00d3fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7f85df00d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7f85df00d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] <... futex resumed>) = 1 [pid 292] 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\x22\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8224) = 46 [pid 292] futex(0x7f85df00d3fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7f85df00d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7f85df00d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] <... futex resumed>) = 1 [ 23.278052][ T24] audit: type=1400 audit(1708637567.480:68): avc: denied { open } for pid=289 comm="syz-executor559" 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 [ 23.301500][ T24] audit: type=1400 audit(1708637567.480:69): avc: denied { mounton } for pid=289 comm="syz-executor559" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 23.305310][ T290] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [pid 292] write(3, "\xa0\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x00\x00\x00\x00\x08\x00\x00\x00\x03\x00\x00\x00\x06\x00\x00\x00\x00\x00\x00\x00\x38\x01\x00\x00\x00\x00\x00\x00\x06\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\xff\x0f\x00\x00"..., 160) = 160 [pid 292] futex(0x7f85df00d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 292] futex(0x7f85df00d3f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 289] <... futex resumed>) = 0 [ 23.324929][ T24] audit: type=1400 audit(1708637567.480:70): avc: denied { mount } for pid=289 comm="syz-executor559" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 23.335712][ T290] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 23.335723][ T290] CPU: 1 PID: 290 Comm: syz-executor559 Not tainted 5.10.209-syzkaller-00435-gdd976ecce2ce #0 [ 23.335727][ T290] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 23.335768][ T290] RIP: 0010:step_into+0x1b9/0xec0 [ 23.335783][ T290] Code: 24 0f 85 cf 0a 00 00 44 8b 3a 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 66 9d 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 [ 23.411501][ T290] RSP: 0018:ffffc90000b67820 EFLAGS: 00010202 [ 23.417392][ T290] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88811edde2c0 [ 23.425200][ T290] RDX: ffffc90000b67c98 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.433190][ T290] RBP: ffffc90000b67950 R08: ffffffff81b4833f R09: ffffed1023a26c95 [ 23.440998][ T290] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200016cf1b [ 23.448895][ T290] R13: dffffc0000000000 R14: ffffc90000b67c60 R15: 0000000000000019 [ 23.456883][ T290] FS: 00007f85def456c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 23.465647][ T290] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.472156][ T290] CR2: 0000000020004220 CR3: 000000011ef87000 CR4: 00000000003506a0 [ 23.480241][ T290] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.488043][ T290] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.495933][ T290] Call Trace: [ 23.499072][ T290] ? __die_body+0x62/0xb0 [ 23.503231][ T290] ? die_addr+0x9f/0xd0 [ 23.507223][ T290] ? exc_general_protection+0x3ff/0x490 [ 23.512606][ T290] ? asm_exc_general_protection+0x1e/0x30 [ 23.518189][ T290] ? step_into+0x15f/0xec0 [ 23.522413][ T290] ? step_into+0x1b9/0xec0 [ 23.526664][ T290] ? set_root+0x3d0/0x3d0 [ 23.530845][ T290] ? __kasan_check_write+0x14/0x20 [ 23.535805][ T290] ? up_read+0x14/0x90 [ 23.539701][ T290] walk_component+0x359/0x610 [ 23.544223][ T290] ? nd_alloc_stack+0xf0/0xf0 [ 23.548712][ T290] ? security_inode_permission+0xb0/0xf0 [ 23.554265][ T290] ? inode_permission+0xf1/0x500 [ 23.559039][ T290] ? fuse_do_getattr+0x7e0/0x7e0 [ 23.563812][ T290] link_path_walk+0x5c7/0xbd0 [ 23.568326][ T290] ? handle_lookup_down+0x130/0x130 [ 23.573465][ T290] path_lookupat+0xa0/0x450 [ 23.577871][ T290] filename_lookup+0x26a/0x6f0 [ 23.582479][ T290] ? hashlen_string+0x120/0x120 [ 23.587165][ T290] ? getname_flags+0x1fd/0x520 [ 23.591758][ T290] user_path_at_empty+0x40/0x50 [ 23.596444][ T290] __se_sys_mount+0x285/0x3b0 [ 23.601132][ T290] ? __x64_sys_mount+0xd0/0xd0 [ 23.605743][ T290] ? fpu__clear_all+0x20/0x20 [ 23.610245][ T290] __x64_sys_mount+0xbf/0xd0 [ 23.614672][ T290] do_syscall_64+0x34/0x70 [ 23.618963][ T290] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 23.624653][ T290] RIP: 0033:0x7f85def832b9 [ 23.628920][ T290] 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 [ 23.648467][ T290] RSP: 002b:00007f85def45218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 23.657403][ T290] RAX: ffffffffffffffda RBX: 00007f85df00d3e8 RCX: 00007f85def832b9 [ 23.665548][ T290] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000000 [ 23.673327][ T290] RBP: 00007f85df00d3e0 R08: 0000000000000000 R09: 0000000000000000 [ 23.681133][ T290] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f85defda018 [ 23.689046][ T290] R13: 00007f85defda00e R14: 0030656c69662f2e R15: 00007f85defda004 [ 23.696958][ T290] Modules linked in: [ 23.700844][ T290] ---[ end trace 570e4aae4fab1c64 ]--- [ 23.706215][ T290] RIP: 0010:step_into+0x1b9/0xec0 [ 23.711101][ T290] Code: 24 0f 85 cf 0a 00 00 44 8b 3a 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 66 9d 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 [ 23.730645][ T290] RSP: 0018:ffffc90000b67820 EFLAGS: 00010202 [ 23.736487][ T290] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88811edde2c0 [ 23.744500][ T290] RDX: ffffc90000b67c98 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.752408][ T290] RBP: ffffc90000b67950 R08: ffffffff81b4833f R09: ffffed1023a26c95 [ 23.760197][ T290] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200016cf1b [ 23.768016][ T290] R13: dffffc0000000000 R14: ffffc90000b67c60 R15: 0000000000000019 [ 23.776173][ T290] FS: 00007f85def456c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [pid 289] exit_group(0 [pid 292] <... futex resumed>) = ? [pid 292] +++ exited with 0 +++ [pid 289] <... exit_group resumed>) = ? [ 23.785335][ T290] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.792086][ T290] CR2: 0000000020004220 CR3: 000000011ef87000 CR4: 00000000003506a0 [ 23.800079][ T290] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.807893][ T290] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.815679][ T290] Kernel panic - not syncing: Fatal exception [ 23.821796][ T290] Kernel Offset: disabled [ 23.825919][ T290] Rebooting in 86400 seconds..