./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1000312406 <...> Warning: Permanently added '10.128.0.42' (ED25519) to the list of known hosts. execve("./syz-executor1000312406", ["./syz-executor1000312406"], 0x7ffc355e4540 /* 10 vars */) = 0 brk(NULL) = 0x555573338000 brk(0x555573338e00) = 0x555573338e00 arch_prctl(ARCH_SET_FS, 0x555573338480) = 0 set_tid_address(0x555573338750) = 289 set_robust_list(0x555573338760, 24) = 0 rseq(0x555573338da0, 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-executor1000312406", 4096) = 28 getrandom("\xcf\xeb\x60\x1a\x9e\x2f\x9c\xe5", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555573338e00 brk(0x555573359e00) = 0x555573359e00 brk(0x55557335a000) = 0x55557335a000 mprotect(0x7fdcfd891000, 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 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7fdcfd7d6b40, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fdcfd7df010}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7fdcfd7d6b40, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fdcfd7df010}, NULL, 8) = 0 write(1, "executing program\n", 18executing program ) = 18 futex(0x7fdcfd8973ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7fdcfd834060, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fdcfd7df010}, 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) = 0x7fdcfd7ac000 mprotect(0x7fdcfd7ad000, 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=0x7fdcfd7cc990, parent_tid=0x7fdcfd7cc990, exit_signal=0, stack=0x7fdcfd7ac000, stack_size=0x20240, tls=0x7fdcfd7cc6c0} => {parent_tid=[290]}, 88) = 290 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7fdcfd8973e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7fdcfd8973ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 290 attached [pid 290] set_robust_list(0x7fdcfd7cc9a0, 24) = 0 [pid 290] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 290] mkdir("./file0", 0777) = 0 [pid 290] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 290] futex(0x7fdcfd8973ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7fdcfd8973e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 290] openat(AT_FDCWD, "/dev/fuse", O_RDWR [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7fdcfd8973ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 290] <... openat resumed>) = 3 [pid 290] futex(0x7fdcfd8973ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7fdcfd8973e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7fdcfd8973ec, 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(0x7fdcfd8973ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7fdcfd8973e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7fdcfd8973ec, 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(0x7fdcfd8973ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7fdcfd8973e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7fdcfd8973ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 290] <... futex resumed>) = 1 [ 22.664420][ T24] audit: type=1400 audit(1729504146.020:66): avc: denied { execmem } for pid=289 comm="syz-executor100" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.685845][ T24] audit: type=1400 audit(1729504146.040:67): avc: denied { read write } for pid=289 comm="syz-executor100" 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 [ 22.709245][ T24] audit: type=1400 audit(1729504146.040:68): avc: denied { open } for pid=289 comm="syz-executor100" 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 [ 22.732488][ T24] audit: type=1400 audit(1729504146.040:69): avc: denied { mounton } for pid=289 comm="syz-executor100" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [pid 290] read(3, [pid 289] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 289] futex(0x7fdcfd8973fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdcfd78b000 [pid 289] mprotect(0x7fdcfd78c000, 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=0x7fdcfd7ab990, parent_tid=0x7fdcfd7ab990, exit_signal=0, stack=0x7fdcfd78b000, stack_size=0x20240, tls=0x7fdcfd7ab6c0} => {parent_tid=[292]}, 88) = 292 [pid 289] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 289] futex(0x7fdcfd8973f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7fdcfd8973fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 292 attached [pid 292] set_robust_list(0x7fdcfd7ab9a0, 24) = 0 [pid 292] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 292] write(3, "\x18\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x00\x00\x00\x00", 24) = 24 [pid 292] futex(0x7fdcfd8973fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 289] <... futex resumed>) = 0 [pid 289] futex(0x7fdcfd8973f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 289] futex(0x7fdcfd8973fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 292] <... futex resumed>) = 1 [pid 292] creat("./file0/file0", 000 [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, "\x90\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"..., 144) = 144 [pid 290] futex(0x7fdcfd8973ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 22.754907][ T24] audit: type=1400 audit(1729504146.050:70): avc: denied { mount } for pid=289 comm="syz-executor100" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 22.756908][ T292] general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] PREEMPT SMP KASAN [ 22.788480][ T292] KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f] [ 22.796721][ T292] CPU: 0 PID: 292 Comm: syz-executor100 Not tainted 5.10.226-syzkaller-00709-ge5e5644ea27f #0 [ 22.806790][ T292] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 22.816863][ T292] RIP: 0010:fuse_atomic_open+0x27f/0x34e0 [ 22.822389][ T292] Code: e0 40 4c 8b 64 24 20 75 07 e8 2d 69 6c ff eb 37 48 8b 44 24 60 48 8d 58 30 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 e3 02 aa ff 48 83 3b 00 0f 84 a9 00 [ 22.841836][ T292] RSP: 0018:ffffc90000b17320 EFLAGS: 00010202 [ 22.847742][ T292] RAX: 0000000000000007 RBX: 0000000000000038 RCX: dffffc0000000000 [ 22.855545][ T292] RDX: ffff8881214ea780 RSI: 0000000000000040 RDI: 0000000000000000 [ 22.863355][ T292] RBP: ffffc90000b17950 R08: ffffffff81fe43b2 R09: ffffed102395cc5c [ 22.871173][ T292] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811cae5fa8 [ 22.878977][ T292] R13: ffff8881079bf000 R14: 1ffff92000162e7c R15: 0000000000000008 [ 22.886790][ T292] FS: 00007fdcfd7ab6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 22.895556][ T292] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.901977][ T292] CR2: 00007fdcfd7abd58 CR3: 0000000121393000 CR4: 00000000003506b0 [ 22.909790][ T292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.917599][ T292] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.925409][ T292] Call Trace: [ 22.928542][ T292] ? __die_body+0x62/0xb0 [ 22.932707][ T292] ? die_addr+0x9f/0xd0 [ 22.936700][ T292] ? exc_general_protection+0x3ff/0x490 [ 22.942080][ T292] ? asm_exc_general_protection+0x1e/0x30 [ 22.947633][ T292] ? fuse_atomic_open+0x252/0x34e0 [ 22.952579][ T292] ? fuse_atomic_open+0x27f/0x34e0 [ 22.957529][ T292] ? fuse_rename2+0x4aa0/0x4aa0 [ 22.962216][ T292] ? avc_alloc_node+0x7e/0x360 [ 22.966814][ T292] ? __kasan_check_write+0x14/0x20 [ 22.971764][ T292] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 22.977055][ T292] ? _raw_spin_lock+0x1b0/0x1b0 [ 22.981741][ T292] ? avc_xperms_populate+0x4c7/0x590 [ 22.986863][ T292] ? _raw_spin_unlock_irqrestore+0x5b/0x80 [ 22.992504][ T292] ? avc_compute_av+0x4cc/0x690 [ 22.997191][ T292] ? avc_has_perm+0x275/0x400 [ 23.001706][ T292] ? avc_has_perm_noaudit+0x240/0x240 [ 23.006911][ T292] ? avc_has_perm_noaudit+0x158/0x240 [ 23.012120][ T292] ? security_transition_sid+0x7d/0x90 [ 23.017415][ T292] ? may_create+0x65a/0x900 [ 23.021753][ T292] ? show_sid+0x250/0x250 [ 23.025919][ T292] ? d_hash_and_lookup+0x1e0/0x1e0 [ 23.030867][ T292] ? from_kgid+0x1a3/0x730 [ 23.035122][ T292] ? selinux_inode_create+0x22/0x30 [ 23.040157][ T292] ? security_inode_create+0xbc/0x100 [ 23.045362][ T292] ? fuse_rename2+0x4aa0/0x4aa0 [ 23.050050][ T292] path_openat+0xff0/0x3000 [ 23.054391][ T292] ? do_filp_open+0x460/0x460 [ 23.058902][ T292] do_filp_open+0x21c/0x460 [ 23.063243][ T292] ? vfs_tmpfile+0x2b0/0x2b0 [ 23.067669][ T292] ? get_unused_fd_flags+0x94/0xa0 [ 23.072616][ T292] do_sys_openat2+0x13f/0x710 [ 23.077128][ T292] ? do_sys_open+0x220/0x220 [ 23.081558][ T292] ? ptrace_notify+0x24c/0x350 [ 23.086153][ T292] ? do_notify_parent+0xa10/0xa10 [ 23.091015][ T292] __x64_sys_creat+0x11f/0x160 [ 23.095616][ T292] ? __x32_compat_sys_openat+0x290/0x290 [ 23.101085][ T292] ? syscall_enter_from_user_mode+0x57/0x1a0 [ 23.106899][ T292] do_syscall_64+0x34/0x70 [ 23.111151][ T292] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 23.116881][ T292] RIP: 0033:0x7fdcfd80e429 [ 23.121136][ T292] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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 [ 23.140573][ T292] RSP: 002b:00007fdcfd7ab168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 23.148820][ T292] RAX: ffffffffffffffda RBX: 00007fdcfd8973f8 RCX: 00007fdcfd80e429 [ 23.156629][ T292] RDX: 00007fdcfd80e429 RSI: 0000000000000000 RDI: 0000000020000080 [pid 290] futex(0x7fdcfd8973e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 289] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [ 23.164441][ T292] RBP: 00007fdcfd8973f0 R08: 00007fdcfd7ab6c0 R09: 00007fdcfd8973f8 [ 23.172253][ T292] R10: 00007fdcfd8973f8 R11: 0000000000000246 R12: 00007fdcfd8973fc [ 23.180172][ T292] R13: 000000000000006e R14: 00007ffd2a000de0 R15: 00007ffd2a000ec8 [ 23.187978][ T292] Modules linked in: [ 23.192352][ T292] ---[ end trace 6298d6c7f9b6f954 ]--- [ 23.197654][ T292] RIP: 0010:fuse_atomic_open+0x27f/0x34e0 [ 23.203163][ T292] Code: e0 40 4c 8b 64 24 20 75 07 e8 2d 69 6c ff eb 37 48 8b 44 24 60 48 8d 58 30 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 e3 02 aa ff 48 83 3b 00 0f 84 a9 00 [ 23.222625][ T292] RSP: 0018:ffffc90000b17320 EFLAGS: 00010202 [ 23.228569][ T292] RAX: 0000000000000007 RBX: 0000000000000038 RCX: dffffc0000000000 [ 23.236320][ T292] RDX: ffff8881214ea780 RSI: 0000000000000040 RDI: 0000000000000000 [ 23.244150][ T292] RBP: ffffc90000b17950 R08: ffffffff81fe43b2 R09: ffffed102395cc5c [ 23.251956][ T292] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811cae5fa8 [pid 289] exit_group(0) = ? [pid 290] <... futex resumed>) = ? [pid 290] +++ exited with 0 +++ [ 23.259770][ T292] R13: ffff8881079bf000 R14: 1ffff92000162e7c R15: 0000000000000008 [ 23.267564][ T292] FS: 00007fdcfd7ab6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 23.276351][ T292] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.282763][ T292] CR2: 00007fdcfd7abd58 CR3: 0000000121393000 CR4: 00000000003506b0 [ 23.290587][ T292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.298398][ T292] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.306184][ T292] Kernel panic - not syncing: Fatal exception [ 23.312256][ T292] Kernel Offset: disabled [ 23.316375][ T292] Rebooting in 86400 seconds..