./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3503249690 <...> em_r:sshd_t tclass=fifo_file permissive=1 [ 12.096725][ T30] audit: type=1400 audit(1684072533.727:64): avc: denied { rlimitinh } for pid=223 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 12.102052][ T30] audit: type=1400 audit(1684072533.727:65): avc: denied { siginh } for pid=223 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.191' (ECDSA) to the list of known hosts. execve("./syz-executor3503249690", ["./syz-executor3503249690"], 0x7ffeb4160040 /* 10 vars */) = 0 brk(NULL) = 0x5555563af000 brk(0x5555563afc40) = 0x5555563afc40 arch_prctl(ARCH_SET_FS, 0x5555563af300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 set_tid_address(0x5555563af5d0) = 293 set_robust_list(0x5555563af5e0, 24) = 0 rt_sigaction(SIGRTMIN, {sa_handler=0x7f09e67052b0, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7f09e6705980}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f09e6705350, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f09e6705980}, 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-executor3503249690", 4096) = 28 brk(0x5555563d0c40) = 0x5555563d0c40 brk(0x5555563d1000) = 0x5555563d1000 mprotect(0x7f09e67c7000, 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(0x7f09e67cd4cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f09e66d5000 mprotect(0x7f09e66d6000, 131072, PROT_READ|PROT_WRITE) = 0 clone(child_stack=0x7f09e66f53f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[294], tls=0x7f09e66f5700, child_tidptr=0x7f09e66f59d0) = 294 futex(0x7f09e67cd4c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f09e67cd4cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 294 attached [pid 294] set_robust_list(0x7f09e66f59e0, 24) = 0 [pid 294] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 294] futex(0x7f09e67cd4cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f09e67cd4c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f09e67cd4cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] <... futex resumed>) = 1 [pid 294] openat(AT_FDCWD, "/dev/fuse", O_RDWR) = 3 [pid 294] futex(0x7f09e67cd4cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f09e67cd4c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f09e67cd4cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] <... futex resumed>) = 1 [pid 294] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=00000000000000000040000,user_id=00000000000000000000,group_id=0000000"...) = 0 [pid 294] futex(0x7f09e67cd4cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f09e67cd4c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f09e67cd4cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] <... futex resumed>) = 1 [pid 294] read(3, "\x68\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\x24\x00\x00\x00\x00\x00\x02\x00\xfb\xff\xff\xf3\xff\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 8192) = 104 [pid 294] 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 294] futex(0x7f09e67cd4cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f09e67cd4c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f09e67cd4cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 294] <... futex resumed>) = 1 [ 21.618285][ T30] audit: type=1400 audit(1684072543.277:66): avc: denied { execmem } for pid=293 comm="syz-executor350" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.625928][ T30] audit: type=1400 audit(1684072543.277:67): avc: denied { read write } for pid=293 comm="syz-executor350" name="fuse" dev="devtmpfs" ino=91 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [ 21.633749][ T30] audit: type=1400 audit(1684072543.277:68): avc: denied { open } for pid=293 comm="syz-executor350" path="/dev/fuse" dev="devtmpfs" ino=91 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [pid 294] mount(NULL, "./file0/file0/file0", NULL, 0, NULL [pid 293] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 293] futex(0x7f09e67cd4dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f09e66b4000 [pid 293] mprotect(0x7f09e66b5000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 293] clone(child_stack=0x7f09e66d43f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 296 attached , parent_tid=[296], tls=0x7f09e66d4700, child_tidptr=0x7f09e66d49d0) = 296 [pid 296] set_robust_list(0x7f09e66d49e0, 24) = 0 [pid 296] futex(0x7f09e67cd4d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 293] futex(0x7f09e67cd4d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 293] futex(0x7f09e67cd4dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 296] <... futex resumed>) = 0 [pid 296] 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\x26\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8224) = 46 [pid 296] futex(0x7f09e67cd4dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 293] <... futex resumed>) = 0 [pid 293] futex(0x7f09e67cd4d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 293] futex(0x7f09e67cd4dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 296] <... futex resumed>) = 1 [pid 296] 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 296] futex(0x7f09e67cd4dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 296] futex(0x7f09e67cd4d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 293] <... futex resumed>) = 0 [ 21.648035][ T30] audit: type=1400 audit(1684072543.277:69): avc: denied { mounton } for pid=293 comm="syz-executor350" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 21.670619][ T30] audit: type=1400 audit(1684072543.277:70): avc: denied { mount } for pid=293 comm="syz-executor350" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 21.695147][ T294] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 21.706697][ T294] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 21.715114][ T294] CPU: 0 PID: 294 Comm: syz-executor350 Not tainted 5.15.106-syzkaller-00249-g19c0ed55a470 #0 [ 21.725356][ T294] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 [ 21.735368][ T294] RIP: 0010:step_into+0x1b6/0xe70 [ 21.740234][ T294] Code: 20 0f 85 99 0a 00 00 44 8b 3b 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 e9 d0 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 86 0a 00 00 8b 1b 89 de 81 e6 00 00 07 [ 21.759679][ T294] RSP: 0018:ffffc900009677e0 EFLAGS: 00010202 [pid 293] exit_group(0) = ? [pid 296] <... futex resumed>) = ? [pid 296] +++ exited with 0 +++ [ 21.765689][ T294] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88811deca780 [ 21.773504][ T294] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 21.781491][ T294] RBP: ffffc90000967910 R08: ffffffff81bd6190 R09: ffffed1021fd9565 [ 21.789386][ T294] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200012cf13 [ 21.797312][ T294] R13: dffffc0000000000 R14: ffffc90000967c40 R15: 0000000000000011 [ 21.805114][ T294] FS: 00007f09e66f5700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 21.813883][ T294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.820306][ T294] CR2: 00007f09e66d4718 CR3: 000000011ae5f000 CR4: 00000000003506b0 [ 21.828115][ T294] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.835925][ T294] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.843736][ T294] Call Trace: [ 21.846862][ T294] [ 21.849644][ T294] ? set_root+0x400/0x400 [ 21.853805][ T294] ? up_read+0x5a/0x180 [ 21.857803][ T294] walk_component+0x359/0x610 [ 21.862311][ T294] ? nd_alloc_stack+0xf0/0xf0 [ 21.866824][ T294] ? security_inode_permission+0xb0/0xf0 [ 21.872292][ T294] ? fuse_do_getattr+0x7e0/0x7e0 [ 21.877065][ T294] link_path_walk+0x642/0xd90 [ 21.881580][ T294] ? handle_lookup_down+0x130/0x130 [ 21.886613][ T294] path_lookupat+0xa0/0x450 [ 21.890954][ T294] filename_lookup+0x230/0x5c0 [ 21.895551][ T294] ? hashlen_string+0x120/0x120 [ 21.900244][ T294] ? getname_flags+0x1fd/0x520 [ 21.904926][ T294] user_path_at_empty+0x43/0x1a0 [ 21.909704][ T294] __se_sys_mount+0x285/0x3b0 [ 21.914220][ T294] ? __x64_sys_mount+0xd0/0xd0 [ 21.918924][ T294] ? __kasan_check_read+0x11/0x20 [ 21.923793][ T294] __x64_sys_mount+0xbf/0xd0 [ 21.928216][ T294] do_syscall_64+0x3d/0xb0 [ 21.932556][ T294] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 21.938284][ T294] RIP: 0033:0x7f09e6743469 [ 21.942535][ T294] 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 [ 21.961975][ T294] RSP: 002b:00007f09e66f52f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 21.970223][ T294] RAX: ffffffffffffffda RBX: 00007f09e67cd4c0 RCX: 00007f09e6743469 [ 21.978035][ T294] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000 [ 21.985844][ T294] RBP: 00007f09e679b01c R08: 0000000000000000 R09: 0000000000000000 [ 21.993655][ T294] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 22.001474][ T294] R13: 0000000000000003 R14: 00007f09e679b038 R15: 00007f09e67cd4c8 [ 22.009283][ T294] [ 22.012144][ T294] Modules linked in: [ 22.016172][ T294] ---[ end trace 9d3fd41dce8e96d3 ]--- [ 22.021458][ T294] RIP: 0010:step_into+0x1b6/0xe70 [ 22.026368][ T294] Code: 20 0f 85 99 0a 00 00 44 8b 3b 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 e9 d0 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 86 0a 00 00 8b 1b 89 de 81 e6 00 00 07 [ 22.045792][ T294] RSP: 0018:ffffc900009677e0 EFLAGS: 00010202 [ 22.051676][ T294] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff88811deca780 [ 22.059505][ T294] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 22.067281][ T294] RBP: ffffc90000967910 R08: ffffffff81bd6190 R09: ffffed1021fd9565 [ 22.075091][ T294] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200012cf13 [ 22.082915][ T294] R13: dffffc0000000000 R14: ffffc90000967c40 R15: 0000000000000011 [ 22.090717][ T294] FS: 00007f09e66f5700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 22.099484][ T294] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.105897][ T294] CR2: 00007f09e66d4718 CR3: 000000011ae5f000 CR4: 00000000003506b0 [ 22.113731][ T294] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.121530][ T294] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.129344][ T294] Kernel panic - not syncing: Fatal exception [ 22.135473][ T294] Kernel Offset: disabled [ 22.139601][ T294] Rebooting in 86400 seconds..