./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2841592273 <...> Warning: Permanently added '10.128.0.192' (ED25519) to the list of known hosts. execve("./syz-executor2841592273", ["./syz-executor2841592273"], 0x7ffdb1b289c0 /* 10 vars */) = 0 brk(NULL) = 0x555557261000 brk(0x555557261d40) = 0x555557261d40 arch_prctl(ARCH_SET_FS, 0x5555572613c0) = 0 set_tid_address(0x555557261690) = 288 set_robust_list(0x5555572616a0, 24) = 0 rseq(0x555557261ce0, 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-executor2841592273", 4096) = 28 getrandom("\xad\x63\xf9\xbd\x31\x5d\x70\xfc", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557261d40 brk(0x555557282d40) = 0x555557282d40 brk(0x555557283000) = 0x555557283000 mprotect(0x7f2253e06000, 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(0x7f2253e0c3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f2253da5360, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f2253d969e0}, 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) = 0x7f2253d21000 mprotect(0x7f2253d22000, 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=0x7f2253d41990, parent_tid=0x7f2253d41990, exit_signal=0, stack=0x7f2253d21000, stack_size=0x20300, tls=0x7f2253d416c0} => {parent_tid=[289]}, 88) = 289 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7f2253e0c3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f2253e0c3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 289 attached [pid 289] set_robust_list(0x7f2253d419a0, 24) = 0 [pid 289] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 289] mkdir("./file0", 000) = 0 [pid 289] futex(0x7f2253e0c3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7f2253e0c3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7f2253e0c3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 289] <... futex resumed>) = 1 [pid 289] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 289] futex(0x7f2253e0c3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7f2253e0c3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7f2253e0c3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 289] <... futex resumed>) = 1 [pid 289] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=00000000000000000040000,user_id=00000000000000000000,group_id=0000000"...) = 0 [pid 289] futex(0x7f2253e0c3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7f2253e0c3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7f2253e0c3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 289] <... futex resumed>) = 1 [pid 289] 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 289] futex(0x7f2253e0c3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7f2253e0c3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7f2253e0c3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 289] <... futex resumed>) = 1 [ 24.619506][ T24] audit: type=1400 audit(1711798265.600:66): avc: denied { execmem } for pid=288 comm="syz-executor284" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.638919][ T24] audit: type=1400 audit(1711798265.600:67): avc: denied { read write } for pid=288 comm="syz-executor284" 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 289] read(3, [pid 288] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 288] futex(0x7f2253e0c3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f2253d00000 [pid 288] mprotect(0x7f2253d01000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 288] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 288] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f2253d20990, parent_tid=0x7f2253d20990, exit_signal=0, stack=0x7f2253d00000, stack_size=0x20300, tls=0x7f2253d206c0} => {parent_tid=[291]}, 88) = 291 [pid 288] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 288] futex(0x7f2253e0c3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7f2253e0c3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 291 attached [pid 291] set_robust_list(0x7f2253d209a0, 24) = 0 [pid 291] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 291] 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 291] futex(0x7f2253e0c3fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7f2253e0c3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7f2253e0c3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 291] <... futex resumed>) = 1 [pid 291] unlink("./file0/file0" [pid 289] <... 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\x23\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8192) = 46 [pid 289] write(3, "\xa9\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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 169) = 169 [pid 289] futex(0x7f2253e0c3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 24.662491][ T24] audit: type=1400 audit(1711798265.600:68): avc: denied { open } for pid=288 comm="syz-executor284" 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 [ 24.682154][ T291] general protection fault, probably for non-canonical address 0xdffffc0000000009: 0000 [#1] PREEMPT SMP KASAN [ 24.686292][ T24] audit: type=1400 audit(1711798265.600:69): avc: denied { mounton } for pid=288 comm="syz-executor284" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 24.697309][ T291] KASAN: null-ptr-deref in range [0x0000000000000048-0x000000000000004f] [ 24.697322][ T291] CPU: 1 PID: 291 Comm: syz-executor284 Not tainted 5.10.209-syzkaller-00001-ge7daca75b4c3 #0 [ 24.697328][ T291] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 24.697363][ T291] RIP: 0010:do_unlinkat+0x3b2/0x8b0 [ 24.697382][ T291] Code: de e8 b2 b0 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 d2 25 f4 ff 49 8b 45 30 48 89 44 24 28 4c [ 24.720468][ T24] audit: type=1400 audit(1711798265.600:70): avc: denied { mount } for pid=288 comm="syz-executor284" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 24.728124][ T291] RSP: 0018:ffffc90000b77da0 EFLAGS: 00010206 [ 24.800419][ T291] RAX: 0000000000000009 RBX: 0000000000000000 RCX: ffff88811e803b40 [ 24.808241][ T291] RDX: ffff88811e803b40 RSI: 0000000000000000 RDI: 0000000000000049 [ 24.816044][ T291] RBP: ffffc90000b77f18 R08: ffffffff81b3fa93 R09: ffffed1023923850 [ 24.823871][ T291] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 24.831666][ T291] R13: 0000000000000019 R14: 1ffff1102392384a R15: dffffc0000000000 [ 24.839598][ T291] FS: 00007f2253d206c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 24.848356][ T291] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.854784][ T291] CR2: 00007f2253d20d58 CR3: 000000011e8b3000 CR4: 00000000003506a0 [ 24.862598][ T291] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.870401][ T291] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.878209][ T291] Call Trace: [ 24.881346][ T291] ? __die_body+0x62/0xb0 [ 24.885525][ T291] ? die_addr+0x9f/0xd0 [ 24.889515][ T291] ? exc_general_protection+0x3ff/0x490 [ 24.894908][ T291] ? asm_exc_general_protection+0x1e/0x30 [ 24.900443][ T291] ? do_unlinkat+0x333/0x8b0 [ 24.904862][ T291] ? do_unlinkat+0x3b2/0x8b0 [ 24.909294][ T291] ? fsnotify_link_count+0x90/0x90 [ 24.914243][ T291] ? strncpy_from_user+0x18e/0x2d0 [ 24.919184][ T291] ? getname_flags+0x1fd/0x520 [ 24.923789][ T291] __x64_sys_unlink+0x49/0x50 [ 24.928301][ T291] do_syscall_64+0x34/0x70 [ 24.932550][ T291] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 24.938278][ T291] RIP: 0033:0x7f2253d7f4b9 [ 24.942528][ T291] 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 [ 24.961974][ T291] RSP: 002b:00007f2253d20218 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [pid 289] futex(0x7f2253e0c3e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 288] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [ 24.970218][ T291] RAX: ffffffffffffffda RBX: 00007f2253e0c3f8 RCX: 00007f2253d7f4b9 [ 24.978026][ T291] RDX: 00007f2253d7f4b9 RSI: 00000000000f4240 RDI: 0000000020000100 [ 24.985850][ T291] RBP: 00007f2253e0c3f0 R08: 0000000000000000 R09: 0000000000000000 [ 24.993647][ T291] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2253dd9024 [ 25.001464][ T291] R13: 000000000000006e R14: 0030656c69662f30 R15: 2f30656c69662f2e [ 25.009269][ T291] Modules linked in: [ 25.013792][ T291] ---[ end trace 8c5fb027d667fa19 ]--- [ 25.019305][ T291] RIP: 0010:do_unlinkat+0x3b2/0x8b0 [ 25.024332][ T291] Code: de e8 b2 b0 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 d2 25 f4 ff 49 8b 45 30 48 89 44 24 28 4c [ 25.044102][ T291] RSP: 0018:ffffc90000b77da0 EFLAGS: 00010206 [ 25.050402][ T291] RAX: 0000000000000009 RBX: 0000000000000000 RCX: ffff88811e803b40 [ 25.058225][ T291] RDX: ffff88811e803b40 RSI: 0000000000000000 RDI: 0000000000000049 [ 25.065998][ T291] RBP: ffffc90000b77f18 R08: ffffffff81b3fa93 R09: ffffed1023923850 [ 25.073887][ T291] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 25.081776][ T291] R13: 0000000000000019 R14: 1ffff1102392384a R15: dffffc0000000000 [ 25.089675][ T291] FS: 00007f2253d206c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 25.098369][ T291] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.104753][ T291] CR2: 000000000061ba0c CR3: 000000011e8b3000 CR4: 00000000003506b0 [ 25.112636][ T291] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.120390][ T291] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.128234][ T291] Kernel panic - not syncing: Fatal exception [ 25.134254][ T291] Kernel Offset: disabled [ 25.138395][ T291] Rebooting in 86400 seconds..