./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1987260579 <...> Warning: Permanently added '10.128.0.196' (ED25519) to the list of known hosts. execve("./syz-executor1987260579", ["./syz-executor1987260579"], 0x7ffd48255a00 /* 10 vars */) = 0 brk(NULL) = 0x5555564ba000 brk(0x5555564bad40) = 0x5555564bad40 arch_prctl(ARCH_SET_FS, 0x5555564ba3c0) = 0 set_tid_address(0x5555564ba690) = 288 set_robust_list(0x5555564ba6a0, 24) = 0 rseq(0x5555564bace0, 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-executor1987260579", 4096) = 28 getrandom("\x84\x4a\x46\x0f\xe5\xfe\xc5\xda", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555564bad40 brk(0x5555564dbd40) = 0x5555564dbd40 brk(0x5555564dc000) = 0x5555564dc000 mprotect(0x7f310e537000, 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(0x7f310e53d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f310e4d6320, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f310e4c79a0}, 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) = 0x7f310e452000 mprotect(0x7f310e453000, 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=0x7f310e472990, parent_tid=0x7f310e472990, exit_signal=0, stack=0x7f310e452000, stack_size=0x20300, tls=0x7f310e4726c0} => {parent_tid=[289]}, 88) = 289 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 futex(0x7f310e53d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f310e53d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 289 attached [pid 289] set_robust_list(0x7f310e4729a0, 24) = 0 [pid 289] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 289] mkdir("./file0", 000) = 0 [pid 289] futex(0x7f310e53d3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7f310e53d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7f310e53d3ec, 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(0x7f310e53d3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7f310e53d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7f310e53d3ec, 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=0000000000000000040000,user_id=00000000000000000000,group_id=00000000"...) = 0 [pid 289] futex(0x7f310e53d3ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7f310e53d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7f310e53d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 289] <... futex resumed>) = 1 [ 22.395605][ T24] audit: type=1400 audit(1695612151.609:66): avc: denied { execmem } for pid=288 comm="syz-executor198" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.416365][ T24] audit: type=1400 audit(1695612151.619:67): avc: denied { read write } for pid=288 comm="syz-executor198" 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] umount2("./file0/../file0/file0", MNT_EXPIRE [pid 288] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 288] futex(0x7f310e53d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 288] futex(0x7f310e53d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 288] futex(0x7f310e53d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f310e431000 [pid 288] mprotect(0x7f310e432000, 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=0x7f310e451990, parent_tid=0x7f310e451990, exit_signal=0, stack=0x7f310e431000, stack_size=0x20300, tls=0x7f310e4516c0} => {parent_tid=[291]}, 88) = 291 [pid 288] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 288] futex(0x7f310e53d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7f310e53d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 291 attached [pid 291] set_robust_list(0x7f310e4519a0, 24) = 0 [pid 291] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 291] 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 291] futex(0x7f310e53d3fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7f310e53d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7f310e53d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 291] <... futex resumed>) = 1 [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(0x7f310e53d3fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 288] <... futex resumed>) = 0 [pid 288] futex(0x7f310e53d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 288] futex(0x7f310e53d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 291] <... futex resumed>) = 1 [pid 291] 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\x21\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8192) = 46 [ 22.440184][ T24] audit: type=1400 audit(1695612151.619:68): avc: denied { open } for pid=288 comm="syz-executor198" 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 [ 22.456463][ T289] general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN [pid 291] write(3, "\xae\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\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 174) = 174 [pid 291] futex(0x7f310e53d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 291] futex(0x7f310e53d3f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 288] <... futex resumed>) = 0 [ 22.465376][ T24] audit: type=1400 audit(1695612151.619:69): avc: denied { mounton } for pid=288 comm="syz-executor198" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 22.476278][ T289] KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] [ 22.476291][ T289] CPU: 1 PID: 289 Comm: syz-executor198 Not tainted 5.10.194-syzkaller-00508-ga27512601c2d #0 [ 22.476296][ T289] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 [ 22.476324][ T289] RIP: 0010:step_into+0x1b9/0xec0 [ 22.476333][ T289] Code: 24 0f 85 cf 0a 00 00 44 8b 3a 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 46 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 [ 22.476338][ T289] RSP: 0018:ffffc90000b179c0 EFLAGS: 00010207 [ 22.499274][ T24] audit: type=1400 audit(1695612151.619:70): avc: denied { mount } for pid=288 comm="syz-executor198" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 22.507035][ T289] RAX: 0000000000000003 RBX: 000000000000001e RCX: ffff88811eaf4f00 [ 22.587925][ T289] RDX: ffffc90000b17d18 RSI: 0000000000000000 RDI: 0000000000000000 [pid 288] exit_group(0) = ? [pid 291] <... futex resumed>) = ? [pid 291] +++ exited with 0 +++ [ 22.595727][ T289] RBP: ffffc90000b17af0 R08: ffffffff81b4571f R09: ffffed1023815a55 [ 22.603539][ T289] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000162f4f [ 22.611349][ T289] R13: dffffc0000000000 R14: ffffc90000b17ce0 R15: 0000000000000089 [ 22.619265][ T289] FS: 00007f310e4726c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 22.628100][ T289] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.634521][ T289] CR2: 0000000020005000 CR3: 000000011eb13000 CR4: 00000000003506a0 [ 22.642431][ T289] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.650393][ T289] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.658259][ T289] Call Trace: [ 22.661330][ T289] ? __die_body+0x62/0xb0 [ 22.665486][ T289] ? die_addr+0x9f/0xd0 [ 22.669484][ T289] ? exc_general_protection+0x3ff/0x490 [ 22.674863][ T289] ? lockref_put_return+0x1b7/0x210 [ 22.680041][ T289] ? asm_exc_general_protection+0x1e/0x30 [ 22.685575][ T289] ? step_into+0x15f/0xec0 [ 22.689826][ T289] ? step_into+0x1b9/0xec0 [ 22.694168][ T289] ? set_root+0x3d0/0x3d0 [ 22.698328][ T289] ? __kasan_check_write+0x14/0x20 [ 22.703280][ T289] ? up_read+0x14/0x90 [ 22.707183][ T289] walk_component+0x359/0x610 [ 22.711695][ T289] ? nd_alloc_stack+0xf0/0xf0 [ 22.716207][ T289] ? handle_lookup_down+0x130/0x130 [ 22.721240][ T289] path_lookupat+0x16d/0x450 [ 22.725763][ T289] filename_lookup+0x26a/0x6f0 [ 22.730356][ T289] ? hashlen_string+0x120/0x120 [ 22.735041][ T289] ? getname_flags+0x1fd/0x520 [ 22.739655][ T289] user_path_at_empty+0x40/0x50 [ 22.744332][ T289] __x64_sys_umount+0xf0/0x170 [ 22.748945][ T289] ? path_umount+0xea0/0xea0 [ 22.753462][ T289] ? syscall_enter_from_user_mode+0x57/0x1a0 [ 22.759272][ T289] do_syscall_64+0x34/0x70 [ 22.763508][ T289] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 22.769250][ T289] RIP: 0033:0x7f310e4b0479 [ 22.773491][ T289] 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 [ 22.793123][ T289] RSP: 002b:00007f310e472218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 [ 22.801366][ T289] RAX: ffffffffffffffda RBX: 00007f310e53d3e8 RCX: 00007f310e4b0479 [ 22.809180][ T289] RDX: 00007f310e4b0479 RSI: 0000000000000004 RDI: 0000000020000080 [ 22.816990][ T289] RBP: 00007f310e53d3e0 R08: 0000000000000000 R09: 0000000000000000 [ 22.825229][ T289] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f310e50a01c [ 22.833294][ T289] R13: 00007f310e50a038 R14: 00007f310e50800e R15: 0030656c69662f30 [ 22.841105][ T289] Modules linked in: [ 22.845227][ T289] ---[ end trace d4288ea42d476f6d ]--- [ 22.850923][ T289] RIP: 0010:step_into+0x1b9/0xec0 [ 22.856666][ T289] Code: 24 0f 85 cf 0a 00 00 44 8b 3a 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 46 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 [ 22.876524][ T289] RSP: 0018:ffffc90000b179c0 EFLAGS: 00010207 [ 22.882526][ T289] RAX: 0000000000000003 RBX: 000000000000001e RCX: ffff88811eaf4f00 [ 22.890416][ T289] RDX: ffffc90000b17d18 RSI: 0000000000000000 RDI: 0000000000000000 [ 22.898668][ T289] RBP: ffffc90000b17af0 R08: ffffffff81b4571f R09: ffffed1023815a55 [ 22.906538][ T289] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000162f4f [ 22.914535][ T289] R13: dffffc0000000000 R14: ffffc90000b17ce0 R15: 0000000000000089 [ 22.922290][ T289] FS: 00007f310e4726c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 22.931246][ T289] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.937891][ T289] CR2: 0000000020005000 CR3: 000000011eb13000 CR4: 00000000003506a0 [ 22.945841][ T289] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.953633][ T289] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.961456][ T289] Kernel panic - not syncing: Fatal exception [ 22.967377][ T289] Kernel Offset: disabled [ 22.971473][ T289] Rebooting in 86400 seconds..