./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1451808830 <...> Warning: Permanently added '10.128.10.45' (ECDSA) to the list of known hosts. execve("./syz-executor1451808830", ["./syz-executor1451808830"], 0x7fff02ff10b0 /* 10 vars */) = 0 brk(NULL) = 0x555555adb000 brk(0x555555adbd40) = 0x555555adbd40 arch_prctl(ARCH_SET_FS, 0x555555adb400) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 set_tid_address(0x555555adb6d0) = 290 set_robust_list(0x555555adb6e0, 24) = 0 rt_sigaction(SIGRTMIN, {sa_handler=0x7f297cd1a310, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7f297cd19860}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f297cd1a3b0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f297cd19860}, NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1451808830", 4096) = 28 brk(0x555555afcd40) = 0x555555afcd40 brk(0x555555afd000) = 0x555555afd000 mprotect(0x7f297cddc000, 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=0x7f297cd141a0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f297cd19860}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f297cd141a0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f297cd19860}, NULL, 8) = 0 futex(0x7f297cde24cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f297cce9000 mprotect(0x7f297ccea000, 131072, PROT_READ|PROT_WRITE) = 0 clone(child_stack=0x7f297cd092f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[291], tls=0x7f297cd09700, child_tidptr=0x7f297cd099d0) = 291 futex(0x7f297cde24c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f297cde24cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 291 attached [pid 291] set_robust_list(0x7f297cd099e0, 24) = 0 [pid 291] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 291] futex(0x7f297cde24cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 290] <... futex resumed>) = 0 [pid 290] futex(0x7f297cde24c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 290] futex(0x7f297cde24cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 291] <... futex resumed>) = 1 [pid 291] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 291] futex(0x7f297cde24cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 290] <... futex resumed>) = 0 [pid 290] futex(0x7f297cde24c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 290] futex(0x7f297cde24cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 291] <... futex resumed>) = 1 [pid 291] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=00000000000000000040000,user_id=00000000000000000000,group_id=0000000"...) = 0 [pid 291] futex(0x7f297cde24cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 290] <... futex resumed>) = 0 [pid 290] futex(0x7f297cde24c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 290] futex(0x7f297cde24cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 291] <... futex resumed>) = 1 [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", 8192) = 56 [pid 291] write(3, "\x50\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x26\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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(0x7f297cde24cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 290] <... futex resumed>) = 0 [pid 290] futex(0x7f297cde24c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 290] futex(0x7f297cde24cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 291] <... futex resumed>) = 1 [ 24.770327][ T24] audit: type=1400 audit(1684073966.770:66): avc: denied { execmem } for pid=290 comm="syz-executor145" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.789803][ T24] audit: type=1400 audit(1684073966.770:67): avc: denied { read write } for pid=290 comm="syz-executor145" 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] mount(NULL, "./file0/file0/file0", NULL, 0, NULL [pid 290] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 290] futex(0x7f297cde24cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 290] futex(0x7f297cde24dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 290] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f297ccc8000 [pid 290] mprotect(0x7f297ccc9000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 290] clone(child_stack=0x7f297cce82f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[293], tls=0x7f297cce8700, child_tidptr=0x7f297cce89d0) = 293 [pid 290] futex(0x7f297cde24d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 290] futex(0x7f297cde24dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 293 attached [pid 293] set_robust_list(0x7f297cce89e0, 24) = 0 [pid 293] 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\x23\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8224) = 46 [pid 293] futex(0x7f297cde24dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 290] <... futex resumed>) = 0 [pid 290] futex(0x7f297cde24d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 290] futex(0x7f297cde24dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 293] <... futex resumed>) = 1 [ 24.813194][ T24] audit: type=1400 audit(1684073966.770:68): avc: denied { open } for pid=290 comm="syz-executor145" 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 [ 24.836514][ T24] audit: type=1400 audit(1684073966.770:69): avc: denied { mounton } for pid=290 comm="syz-executor145" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 24.840592][ T291] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 24.859280][ T24] audit: type=1400 audit(1684073966.770:70): avc: denied { mount } for pid=290 comm="syz-executor145" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 24.870509][ T291] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 24.870523][ T291] CPU: 1 PID: 291 Comm: syz-executor145 Not tainted 5.10.178-syzkaller-00127-g43c801dc3325 #0 [ 24.870530][ T291] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 [ 24.870570][ T291] RIP: 0010:step_into+0x1b9/0xec0 [ 24.925584][ T291] Code: 24 0f 85 cf 0a 00 00 44 8b 3a 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 56 a2 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 [ 24.945194][ T291] RSP: 0018:ffffc90000b27820 EFLAGS: 00010202 [ 24.951092][ T291] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88811e9893c0 [ 24.958901][ T291] RDX: ffffc90000b27c98 RSI: 0000000000000000 RDI: 0000000000000000 [ 24.966729][ T291] RBP: ffffc90000b27950 R08: ffffffff81b3ddff R09: ffffed1023a14375 [ 24.974526][ T291] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000164f1b [ 24.982345][ T291] R13: dffffc0000000000 R14: ffffc90000b27c60 R15: 0000000000000011 [ 24.990151][ T291] FS: 00007f297cd09700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 24.998909][ T291] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.005333][ T291] CR2: 00007f297cce8718 CR3: 000000011e8d9000 CR4: 00000000003506a0 [ 25.013146][ T291] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.020951][ T291] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.028763][ T291] Call Trace: [ 25.031901][ T291] ? set_root+0x3d0/0x3d0 [ 25.036058][ T291] ? __kasan_check_write+0x14/0x20 [ 25.041006][ T291] ? up_read+0x14/0x90 [ 25.044911][ T291] walk_component+0x359/0x610 [ 25.049426][ T291] ? nd_alloc_stack+0xf0/0xf0 [ 25.053936][ T291] ? security_inode_permission+0xb0/0xf0 [ 25.059408][ T291] ? inode_permission+0xf1/0x500 [ 25.064174][ T291] ? fuse_do_getattr+0x7e0/0x7e0 [ 25.068952][ T291] link_path_walk+0x5c7/0xbd0 [ 25.073466][ T291] ? handle_lookup_down+0x130/0x130 [ 25.078506][ T291] path_lookupat+0xa0/0x450 [ 25.082840][ T291] filename_lookup+0x26a/0x6f0 [ 25.087439][ T291] ? hashlen_string+0x120/0x120 [ 25.092213][ T291] ? getname_flags+0x1fd/0x520 [ 25.096816][ T291] user_path_at_empty+0x40/0x50 [ 25.101497][ T291] __se_sys_mount+0x285/0x3b0 [ 25.106038][ T291] ? __x64_sys_mount+0xd0/0xd0 [ 25.110614][ T291] ? fpu__clear_all+0x20/0x20 [ 25.115213][ T291] __x64_sys_mount+0xbf/0xd0 [ 25.119790][ T291] do_syscall_64+0x34/0x70 [ 25.124030][ T291] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 25.129757][ T291] RIP: 0033:0x7f297cd58299 [ 25.134012][ T291] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 14 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 b8 ff ff ff f7 d8 64 89 01 48 [ 25.153456][ T291] RSP: 002b:00007f297cd09208 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 25.161716][ T291] RAX: ffffffffffffffda RBX: 00007f297cde24c8 RCX: 00007f297cd58299 [pid 293] write(3, "\xa0\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"..., 160) = 160 [pid 293] futex(0x7f297cde24dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 293] futex(0x7f297cde24d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 290] <... futex resumed>) = 0 [pid 290] exit_group(0) = ? [pid 293] <... futex resumed>) = ? [pid 293] +++ exited with 0 +++ [ 25.169507][ T291] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000 [ 25.177320][ T291] RBP: 00007f297cde24c0 R08: 0000000000000000 R09: 00007f297cde24c8 [ 25.185127][ T291] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f297cde24cc [ 25.192938][ T291] R13: 00007ffcd0007d9f R14: 00007f297cd09300 R15: 0000000000022000 [ 25.200754][ T291] Modules linked in: [ 25.204914][ T291] ---[ end trace 0a9a389904666cbb ]--- [ 25.210226][ T291] RIP: 0010:step_into+0x1b9/0xec0 [ 25.215049][ T291] Code: 24 0f 85 cf 0a 00 00 44 8b 3a 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 56 a2 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 [ 25.234528][ T291] RSP: 0018:ffffc90000b27820 EFLAGS: 00010202 [ 25.240406][ T291] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88811e9893c0 [ 25.248320][ T291] RDX: ffffc90000b27c98 RSI: 0000000000000000 RDI: 0000000000000000 [ 25.256139][ T291] RBP: ffffc90000b27950 R08: ffffffff81b3ddff R09: ffffed1023a14375 [ 25.263992][ T291] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000164f1b [ 25.271813][ T291] R13: dffffc0000000000 R14: ffffc90000b27c60 R15: 0000000000000011 [ 25.279592][ T291] FS: 00007f297cd09700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 25.288353][ T291] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.294747][ T291] CR2: 00007f297cce8718 CR3: 000000011e8d9000 CR4: 00000000003506a0 [ 25.302589][ T291] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.310408][ T291] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.318335][ T291] Kernel panic - not syncing: Fatal exception [ 25.324417][ T291] Kernel Offset: disabled [ 25.328546][ T291] Rebooting in 86400 seconds..