./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2513831030 <...> Warning: Permanently added '10.128.0.89' (ED25519) to the list of known hosts. execve("./syz-executor2513831030", ["./syz-executor2513831030"], 0x7ffdc3969910 /* 10 vars */) = 0 brk(NULL) = 0x555573a6a000 brk(0x555573a6ad40) = 0x555573a6ad40 arch_prctl(ARCH_SET_FS, 0x555573a6a3c0) = 0 set_tid_address(0x555573a6a690) = 289 set_robust_list(0x555573a6a6a0, 24) = 0 rseq(0x555573a6ace0, 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-executor2513831030", 4096) = 28 getrandom("\x9d\x48\xb2\xd2\x6d\x3a\x73\x19", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555573a6ad40 brk(0x555573a8bd40) = 0x555573a8bd40 brk(0x555573a8c000) = 0x555573a8c000 mprotect(0x7f2d5f4d8000, 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 write(1, "executing program\n", 18executing program ) = 18 futex(0x7f2d5f4de3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f2d5f477360, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f2d5f4689e0}, 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) = 0x7f2d5f3f3000 mprotect(0x7f2d5f3f4000, 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=0x7f2d5f413990, parent_tid=0x7f2d5f413990, exit_signal=0, stack=0x7f2d5f3f3000, stack_size=0x20300, tls=0x7f2d5f4136c0} => {parent_tid=[290]}, 88) = 290 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7f2d5f4de3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f2d5f4de3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 290 attached [pid 290] set_robust_list(0x7f2d5f4139a0, 24) = 0 [pid 290] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 290] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 290] futex(0x7f2d5f4de3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7f2d5f4de3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7f2d5f4de3ec, 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(0x7f2d5f4de3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7f2d5f4de3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7f2d5f4de3ec, 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=00000000000000000040000,user_id=00000000000000000000,group_id=0000000"...) = 0 [pid 290] futex(0x7f2d5f4de3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7f2d5f4de3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7f2d5f4de3ec, 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(0x7f2d5f4de3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7f2d5f4de3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7f2d5f4de3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 290] <... futex resumed>) = 1 [ 22.184552][ T24] audit: type=1400 audit(1729805994.629:66): avc: denied { execmem } for pid=289 comm="syz-executor251" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.204455][ T24] audit: type=1400 audit(1729805994.649:67): avc: denied { read write } for pid=289 comm="syz-executor251" 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] read(3, [pid 289] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 289] futex(0x7f2d5f4de3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f2d5f3d2000 [pid 289] mprotect(0x7f2d5f3d3000, 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=0x7f2d5f3f2990, parent_tid=0x7f2d5f3f2990, exit_signal=0, stack=0x7f2d5f3d2000, stack_size=0x20300, tls=0x7f2d5f3f26c0} => {parent_tid=[292]}, 88) = 292 [pid 289] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 289] futex(0x7f2d5f4de3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7f2d5f4de3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 292 attached [pid 292] set_robust_list(0x7f2d5f3f29a0, 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\x28\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7f2d5f4de3fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7f2d5f4de3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7f2d5f4de3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] <... futex resumed>) = 1 [pid 292] unlink("./file0/file0" [pid 290] <... read resumed>"\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", 8192) = 46 [pid 290] write(3, "\x9a\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xfd\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\x00\x00\x00\x00\x00\x00\x00\x00"..., 154) = 154 [pid 290] futex(0x7f2d5f4de3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 22.227772][ T24] audit: type=1400 audit(1729805994.649:68): avc: denied { open } for pid=289 comm="syz-executor251" 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 [ 22.250891][ T24] audit: type=1400 audit(1729805994.649:69): avc: denied { mounton } for pid=289 comm="syz-executor251" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 22.273385][ T24] audit: type=1400 audit(1729805994.649:70): avc: denied { mount } for pid=289 comm="syz-executor251" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 22.276740][ T292] general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] PREEMPT SMP KASAN [ 22.306984][ T292] KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f] [ 22.315229][ T292] CPU: 0 PID: 292 Comm: syz-executor251 Not tainted 5.10.226-syzkaller-00709-ge5e5644ea27f #0 [ 22.325293][ T292] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 22.335213][ T292] RIP: 0010:do_unlinkat+0x3b2/0x8b0 [ 22.340245][ T292] Code: de e8 02 8a b6 ff 31 c0 81 fb 00 00 20 00 0f 94 c0 41 bf ec ff ff ff 41 29 c7 e9 99 00 00 00 49 8d 7d 30 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 02 20 f4 ff 49 8b 45 30 48 89 44 24 28 4c [ 22.359675][ T292] RSP: 0018:ffffc90000b47da0 EFLAGS: 00010202 [ 22.365570][ T292] RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffff888121514f00 [ 22.373377][ T292] RDX: ffff888121514f00 RSI: 0000000000000000 RDI: 000000000000003a [ 22.381190][ T292] RBP: ffffc90000b47f18 R08: ffffffff81b42643 R09: ffffed10239522b6 [ 22.389006][ T292] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 22.396813][ T292] R13: 000000000000000a R14: 1ffff110239522b0 R15: dffffc0000000000 [ 22.404627][ T292] FS: 00007f2d5f3f26c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 22.413480][ T292] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.419901][ T292] CR2: 00007f2d5f3f2d58 CR3: 0000000120559000 CR4: 00000000003506b0 [ 22.427714][ T292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.435524][ T292] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.443332][ T292] Call Trace: [ 22.446470][ T292] ? __die_body+0x62/0xb0 [ 22.450629][ T292] ? die_addr+0x9f/0xd0 [ 22.454622][ T292] ? exc_general_protection+0x3ff/0x490 [ 22.460022][ T292] ? asm_exc_general_protection+0x1e/0x30 [ 22.465564][ T292] ? do_unlinkat+0x333/0x8b0 [ 22.469984][ T292] ? do_unlinkat+0x3b2/0x8b0 [ 22.474412][ T292] ? fsnotify_link_count+0x90/0x90 [ 22.479362][ T292] ? strncpy_from_user+0x18e/0x2d0 [ 22.484307][ T292] ? getname_flags+0x1fd/0x520 [ 22.488907][ T292] __x64_sys_unlink+0x49/0x50 [ 22.493419][ T292] do_syscall_64+0x34/0x70 [ 22.497670][ T292] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 22.503398][ T292] RIP: 0033:0x7f2d5f4514b9 [ 22.507653][ T292] 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 [ 22.527184][ T292] RSP: 002b:00007f2d5f3f2218 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [pid 290] futex(0x7f2d5f4de3e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 289] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [ 22.535423][ T292] RAX: ffffffffffffffda RBX: 00007f2d5f4de3f8 RCX: 00007f2d5f4514b9 [ 22.543235][ T292] RDX: 00007f2d5f4514b9 RSI: 00000000000f4240 RDI: 0000000020000100 [ 22.551135][ T292] RBP: 00007f2d5f4de3f0 R08: 0000000000000000 R09: 0000000000000000 [ 22.558945][ T292] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2d5f4ab034 [ 22.566758][ T292] R13: 000000000000006e R14: 0030656c69662f30 R15: 2f30656c69662f2e [ 22.574569][ T292] Modules linked in: [ 22.578801][ T292] ---[ end trace dd7dfff6b96375dc ]--- [ 22.584100][ T292] RIP: 0010:do_unlinkat+0x3b2/0x8b0 [ 22.589157][ T292] Code: de e8 02 8a b6 ff 31 c0 81 fb 00 00 20 00 0f 94 c0 41 bf ec ff ff ff 41 29 c7 e9 99 00 00 00 49 8d 7d 30 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 02 20 f4 ff 49 8b 45 30 48 89 44 24 28 4c [ 22.608652][ T292] RSP: 0018:ffffc90000b47da0 EFLAGS: 00010202 [ 22.614443][ T292] RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffff888121514f00 [ 22.622281][ T292] RDX: ffff888121514f00 RSI: 0000000000000000 RDI: 000000000000003a [ 22.630096][ T292] RBP: ffffc90000b47f18 R08: ffffffff81b42643 R09: ffffed10239522b6 [ 22.637899][ T292] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 22.645708][ T292] R13: 000000000000000a R14: 1ffff110239522b0 R15: dffffc0000000000 [ 22.653502][ T292] FS: 00007f2d5f3f26c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 22.662289][ T292] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.668705][ T292] CR2: 00007f2d5f3f2d58 CR3: 0000000120559000 CR4: 00000000003506b0 [ 22.676523][ T292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.684313][ T292] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.692150][ T292] Kernel panic - not syncing: Fatal exception [ 22.698197][ T292] Kernel Offset: disabled [ 22.702315][ T292] Rebooting in 86400 seconds..