./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2640341964 <...> Warning: Permanently added '10.128.1.135' (ED25519) to the list of known hosts. execve("./syz-executor2640341964", ["./syz-executor2640341964"], 0x7fff0a6bfcd0 /* 10 vars */) = 0 brk(NULL) = 0x5555555dc000 brk(0x5555555dcd40) = 0x5555555dcd40 arch_prctl(ARCH_SET_FS, 0x5555555dc3c0) = 0 set_tid_address(0x5555555dc690) = 291 set_robust_list(0x5555555dc6a0, 24) = 0 rseq(0x5555555dcce0, 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-executor2640341964", 4096) = 28 getrandom("\x20\xd9\x55\xc0\xa8\x67\x19\x27", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555555dcd40 brk(0x5555555fdd40) = 0x5555555fdd40 brk(0x5555555fe000) = 0x5555555fe000 mprotect(0x7feee82d6000, 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 mkdir("./syzkaller.l1mYKv", 0700) = 0 chmod("./syzkaller.l1mYKv", 0777) = 0 chdir("./syzkaller.l1mYKv") = 0 write(1, "executing program\n", 18executing program ) = 18 futex(0x7feee82dc3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7feee8275930, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7feee8266ab0}, 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) = 0x7feee81f1000 mprotect(0x7feee81f2000, 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=0x7feee8211990, parent_tid=0x7feee8211990, exit_signal=0, stack=0x7feee81f1000, stack_size=0x20300, tls=0x7feee82116c0} => {parent_tid=[292]}, 88) = 292 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7feee82dc3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7feee82dc3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 292 attached [pid 292] set_robust_list(0x7feee82119a0, 24) = 0 [pid 292] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 292] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 292] futex(0x7feee82dc3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 292] <... futex resumed>) = 1 [pid 291] futex(0x7feee82dc3e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] futex(0x7feee82dc3e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 291] <... futex resumed>) = 0 [pid 292] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 291] futex(0x7feee82dc3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 292] futex(0x7feee82dc3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 292] <... futex resumed>) = 1 [pid 291] futex(0x7feee82dc3e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] futex(0x7feee82dc3e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 291] <... futex resumed>) = 0 [pid 292] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 291] futex(0x7feee82dc3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=00000000000000000040000,user_id=00000000000000000000,group_id=0000000"...) = 0 [pid 292] futex(0x7feee82dc3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 292] <... futex resumed>) = 1 [pid 291] futex(0x7feee82dc3e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] read(3, [pid 291] <... futex resumed>) = 0 [pid 292] <... read resumed>"\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 291] futex(0x7feee82dc3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] futex(0x7feee82dc3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 292] <... futex resumed>) = 0 [pid 291] futex(0x7feee82dc3e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 292] read(3, [pid 291] <... futex resumed>) = 0 [ 25.406282][ T24] audit: type=1400 audit(1722218419.440:66): avc: denied { execmem } for pid=291 comm="syz-executor264" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 25.428109][ T24] audit: type=1400 audit(1722218419.460:67): avc: denied { read write } for pid=291 comm="syz-executor264" 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 291] futex(0x7feee82dc3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 291] futex(0x7feee82dc3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7feee81d0000 [pid 291] mprotect(0x7feee81d1000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 291] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 291] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7feee81f0990, parent_tid=0x7feee81f0990, exit_signal=0, stack=0x7feee81d0000, stack_size=0x20300, tls=0x7feee81f06c0} => {parent_tid=[294]}, 88) = 294 [pid 291] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 291] futex(0x7feee82dc3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7feee82dc3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 294 attached [pid 294] set_robust_list(0x7feee81f09a0, 24) = 0 [pid 294] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 294] 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 294] futex(0x7feee82dc3fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 291] <... futex resumed>) = 0 [pid 291] futex(0x7feee82dc3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 291] futex(0x7feee82dc3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] <... futex resumed>) = 1 [pid 294] unlink("./file0/file0" [pid 292] <... 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\x26\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8192) = 46 [pid 292] write(3, "\x96\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\x00\x00\x00\x00\x00\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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 150) = 150 [pid 292] futex(0x7feee82dc3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 25.451503][ T24] audit: type=1400 audit(1722218419.460:68): avc: denied { open } for pid=291 comm="syz-executor264" 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 [ 25.475080][ T24] audit: type=1400 audit(1722218419.460:69): avc: denied { mounton } for pid=291 comm="syz-executor264" path="/root/syzkaller.l1mYKv/file0" dev="sda1" ino=1928 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 25.499254][ T24] audit: type=1400 audit(1722218419.460:70): avc: denied { mount } for pid=291 comm="syz-executor264" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 25.505481][ T294] general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN [ 25.532732][ T294] KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] [ 25.540977][ T294] CPU: 1 PID: 294 Comm: syz-executor264 Not tainted 5.10.222-syzkaller-01494-gfd58936f3c1f #0 [ 25.551036][ T294] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 [ 25.560961][ T294] RIP: 0010:do_unlinkat+0x3b2/0x8b0 [ 25.565967][ T294] Code: de e8 42 8d 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 32 21 f4 ff 49 8b 45 30 48 89 44 24 28 4c [ 25.585411][ T294] RSP: 0018:ffffc90000b67da0 EFLAGS: 00010207 [ 25.591311][ T294] RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffff88812024e2c0 [ 25.599208][ T294] RDX: ffff88812024e2c0 RSI: 0000000000000000 RDI: 0000000000000036 [ 25.607022][ T294] RBP: ffffc90000b67f18 R08: ffffffff81b41f13 R09: ffffed1023a431c6 [ 25.614839][ T294] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 25.622641][ T294] R13: 0000000000000006 R14: 1ffff11023a431c0 R15: dffffc0000000000 [ 25.630454][ T294] FS: 00007feee81f06c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 25.639395][ T294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.645817][ T294] CR2: 00007feee81f0d58 CR3: 0000000117be8000 CR4: 00000000003506a0 [ 25.653626][ T294] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.661436][ T294] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.669330][ T294] Call Trace: [ 25.672469][ T294] ? __die_body+0x62/0xb0 [ 25.676632][ T294] ? die_addr+0x9f/0xd0 [ 25.680622][ T294] ? exc_general_protection+0x3ff/0x490 [ 25.686006][ T294] ? asm_exc_general_protection+0x1e/0x30 [ 25.691558][ T294] ? do_unlinkat+0x333/0x8b0 [ 25.695983][ T294] ? do_unlinkat+0x3b2/0x8b0 [ 25.700426][ T294] ? fsnotify_link_count+0x90/0x90 [ 25.705384][ T294] ? strncpy_from_user+0x18e/0x2d0 [ 25.710309][ T294] ? getname_flags+0x1fd/0x520 [ 25.714907][ T294] __x64_sys_unlink+0x49/0x50 [ 25.719524][ T294] do_syscall_64+0x34/0x70 [ 25.723778][ T294] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 25.729493][ T294] RIP: 0033:0x7feee824f589 [ 25.733837][ T294] 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 [pid 292] futex(0x7feee82dc3e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 291] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [ 25.753360][ T294] RSP: 002b:00007feee81f0218 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [ 25.761600][ T294] RAX: ffffffffffffffda RBX: 00007feee82dc3f8 RCX: 00007feee824f589 [ 25.769410][ T294] RDX: 00007feee824f589 RSI: 00000000000f4240 RDI: 0000000020000100 [ 25.777219][ T294] RBP: 00007feee82dc3f0 R08: 0000000000000000 R09: 0000000000000000 [ 25.785041][ T294] R10: 0000000000000000 R11: 0000000000000246 R12: 00007feee82a9034 [ 25.792946][ T294] R13: 000000000000006e R14: 0030656c69662f30 R15: 2f30656c69662f2e [ 25.800741][ T294] Modules linked in: [ 25.805308][ T294] ---[ end trace d430ed767e1e70d0 ]--- [ 25.810707][ T294] RIP: 0010:do_unlinkat+0x3b2/0x8b0 [ 25.815714][ T294] Code: de e8 42 8d 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 32 21 f4 ff 49 8b 45 30 48 89 44 24 28 4c [ 25.835222][ T294] RSP: 0018:ffffc90000b67da0 EFLAGS: 00010207 [ 25.841071][ T294] RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffff88812024e2c0 [ 25.848865][ T294] RDX: ffff88812024e2c0 RSI: 0000000000000000 RDI: 0000000000000036 [ 25.856705][ T294] RBP: ffffc90000b67f18 R08: ffffffff81b41f13 R09: ffffed1023a431c6 [ 25.864503][ T294] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 25.872695][ T294] R13: 0000000000000006 R14: 1ffff11023a431c0 R15: dffffc0000000000 [ 25.880473][ T294] FS: 00007feee81f06c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 25.889222][ T294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.895721][ T294] CR2: 00000000200005c0 CR3: 0000000117be8000 CR4: 00000000003506b0 [ 25.903477][ T294] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.911381][ T294] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.919166][ T294] Kernel panic - not syncing: Fatal exception [ 25.925415][ T294] Kernel Offset: disabled [ 25.929540][ T294] Rebooting in 86400 seconds..