./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3554094763 <...> denied { siginh } for pid=304 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.1.133' (ECDSA) to the list of known hosts. execve("./syz-executor3554094763", ["./syz-executor3554094763"], 0x7fff8d3d1c00 /* 10 vars */) = 0 brk(NULL) = 0x555557054000 brk(0x555557054c40) = 0x555557054c40 arch_prctl(ARCH_SET_FS, 0x555557054300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 set_tid_address(0x5555570545d0) = 362 set_robust_list(0x5555570545e0, 24) = 0 rt_sigaction(SIGRTMIN, {sa_handler=0x7f84fb3bb610, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7f84fb3bbce0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f84fb3bb6b0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f84fb3bbce0}, 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-executor3554094763", 4096) = 28 brk(0x555557075c40) = 0x555557075c40 brk(0x555557076000) = 0x555557076000 mprotect(0x7f84fb47f000, 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(0x7f84fb4854cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f84fb38b000 mprotect(0x7f84fb38c000, 131072, PROT_READ|PROT_WRITE) = 0 clone(child_stack=0x7f84fb3ab3f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[363], tls=0x7f84fb3ab700, child_tidptr=0x7f84fb3ab9d0) = 363 futex(0x7f84fb4854c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7f84fb4854cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 363 attached [pid 363] set_robust_list(0x7f84fb3ab9e0, 24) = 0 [pid 363] mkdirat(AT_FDCWD, "./file0", 000) = 0 [pid 363] futex(0x7f84fb4854cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 362] <... futex resumed>) = 0 [pid 362] futex(0x7f84fb4854c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 362] futex(0x7f84fb4854cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 363] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 363] futex(0x7f84fb4854cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 362] <... futex resumed>) = 0 [pid 363] <... futex resumed>) = 1 [pid 362] futex(0x7f84fb4854c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 362] futex(0x7f84fb4854cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 363] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=00000000000000000040000,user_id=00000000000000000000,group_id=0000000"...) = 0 [pid 363] futex(0x7f84fb4854cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 362] <... futex resumed>) = 0 [pid 362] futex(0x7f84fb4854c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 362] futex(0x7f84fb4854cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 363] <... futex resumed>) = 1 [pid 363] 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\x1f\x00\x00\x00\x00\x00\x02\x00\xfb\xff\xff\x83", 8224) = 56 [pid 363] futex(0x7f84fb4854cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 362] <... futex resumed>) = 0 [pid 362] futex(0x7f84fb4854c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 362] futex(0x7f84fb4854cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 363] <... futex resumed>) = 1 [pid 363] write(3, "\x50\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x21\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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 80) = 80 [pid 363] futex(0x7f84fb4854cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 362] <... futex resumed>) = 0 [pid 362] futex(0x7f84fb4854c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 362] futex(0x7f84fb4854cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 363] <... futex resumed>) = 1 [ 29.898087][ T23] audit: type=1400 audit(1684441995.870:66): avc: denied { execmem } for pid=362 comm="syz-executor355" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 29.921344][ T23] audit: type=1400 audit(1684441995.890:67): avc: denied { read write } for pid=362 comm="syz-executor355" name="fuse" dev="devtmpfs" ino=9263 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [pid 363] read(3, [pid 362] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 362] futex(0x7f84fb4854cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 362] futex(0x7f84fb4854dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 362] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f84fb36a000 [pid 362] mprotect(0x7f84fb36b000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 362] clone(child_stack=0x7f84fb38a3f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[365], tls=0x7f84fb38a700, child_tidptr=0x7f84fb38a9d0) = 365 [pid 362] futex(0x7f84fb4854d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 362] futex(0x7f84fb4854dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 365 attached [pid 365] set_robust_list(0x7f84fb38a9e0, 24) = 0 [ 29.945298][ T23] audit: type=1400 audit(1684441995.890:68): avc: denied { open } for pid=362 comm="syz-executor355" path="/dev/fuse" dev="devtmpfs" ino=9263 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fuse_device_t tclass=chr_file permissive=1 [ 29.968671][ T23] audit: type=1400 audit(1684441995.890:69): avc: denied { mounton } for pid=362 comm="syz-executor355" 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 365] read(3, [pid 362] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 362] futex(0x7f84fb4854dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 362] futex(0x7f84fb4854dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 362] futex(0x7f84fb4854ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 362] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f84fb349000 [pid 362] mprotect(0x7f84fb34a000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 362] clone(child_stack=0x7f84fb3693f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[366], tls=0x7f84fb369700, child_tidptr=0x7f84fb3699d0) = 366 [pid 362] futex(0x7f84fb4854e8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 366 attached ) = 0 [pid 362] futex(0x7f84fb4854ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 366] set_robust_list(0x7f84fb3699e0, 24) = 0 [pid 366] openat(AT_FDCWD, "./file0/file0", O_RDONLY|O_CREAT, 000 [pid 363] <... 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\x6e\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8192) = 46 [pid 363] 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 363] futex(0x7f84fb4854cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 363] futex(0x7f84fb4854c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 365] <... read resumed>"\x3e\x00\x00\x00\x23\x00\x00\x00\x06\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x6e\x01\x00\x00\x00\x00\x00\x00\x40\x80\x00\x00\x00\x80\x00\x00\x3f\x00\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8192) = 62 [pid 365] write(3, "\xa0\x00\x00\x00\x00\x00\x00\x00\x06\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\x01\x80\xff\xff\xff\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x09\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 365] futex(0x7f84fb4854dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 29.991800][ T23] audit: type=1400 audit(1684441995.900:70): avc: denied { mount } for pid=362 comm="syz-executor355" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [pid 365] futex(0x7f84fb4854d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 362] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 362] futex(0x7f84fb4854c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 363] <... futex resumed>) = 0 [pid 362] futex(0x7f84fb4854cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 363] read(3, "\x28\x00\x00\x00\xe0\x07\x00\x00\x08\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x6e\x01\x00\x00\x00\x00\x00\x00", 8224) = 40 [pid 363] futex(0x7f84fb4854cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 362] <... futex resumed>) = 0 [pid 363] <... futex resumed>) = 1 [pid 362] futex(0x7f84fb4854c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 363] futex(0x7f84fb4854c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 362] <... futex resumed>) = 0 [pid 363] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 362] futex(0x7f84fb4854cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [ 30.088800][ T363] BUG: unable to handle page fault for address: ffffed105c5c55ff [ 30.096602][ T363] #PF: supervisor read access in kernel mode [ 30.102440][ T363] #PF: error_code(0x0000) - not-present page [ 30.108368][ T363] PGD 23fff3067 P4D 23fff3067 PUD 23fff1067 PMD 0 [ 30.114696][ T363] Oops: 0000 [#1] PREEMPT SMP KASAN [ 30.119834][ T363] CPU: 1 PID: 363 Comm: syz-executor355 Not tainted 5.4.233-syzkaller-00003-gf423d52eea72 #0 [ 30.129905][ T363] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 [ 30.139805][ T363] RIP: 0010:fuse_dev_do_write+0x21f0/0x4e00 [ 30.145537][ T363] Code: d0 b3 ff 4d 8b 3f 4c 89 e0 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 cc 26 00 00 45 8b 24 24 41 ff cc 4d 01 fc 4c 89 e0 48 c1 e8 03 <0f> b6 04 18 84 c0 0f 85 cd 26 00 00 41 c6 04 24 00 41 80 3c 1e 00 [ 30.165197][ T363] RSP: 0018:ffff8881dfb0f7e0 EFLAGS: 00010a07 [ 30.171090][ T363] RAX: 1ffff1105c5c55ff RBX: dffffc0000000000 RCX: ffff8881e2db5e80 [ 30.178902][ T363] RDX: 0000000000000000 RSI: 00000000000007e0 RDI: 00000000000007e0 [ 30.186721][ T363] RBP: ffff8881dfb0fb30 R08: ffffffff81e005b0 R09: fffff94000ef44ff [ 30.194523][ T363] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8882e2e2afff [ 30.202336][ T363] R13: 0000000000000010 R14: 1ffff1103c5c4d70 R15: ffff8881e2e2b000 [ 30.210150][ T363] FS: 00007f84fb3ab700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 30.218917][ T363] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.225335][ T363] CR2: ffffed105c5c55ff CR3: 00000001e2e2d000 CR4: 00000000003406a0 [ 30.233150][ T363] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.240966][ T363] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.248767][ T363] Call Trace: [ 30.252007][ T363] ? ttwu_do_wakeup+0x161/0x480 [ 30.256807][ T363] ? check_preemption_disabled+0x9f/0x320 [ 30.262879][ T363] ? try_to_wake_up+0x790/0x14a0 [ 30.267652][ T363] ? debug_smp_processor_id+0x20/0x20 [ 30.272868][ T363] ? put_page+0xb0/0xb0 [ 30.276834][ T363] ? check_preemption_disabled+0x9f/0x320 [ 30.282749][ T363] ? check_preemption_disabled+0x9f/0x320 [ 30.288301][ T363] ? debug_smp_processor_id+0x20/0x20 [ 30.293509][ T363] ? check_preemption_disabled+0x9f/0x320 [ 30.301927][ T363] ? check_preemption_disabled+0x9f/0x320 [ 30.307480][ T363] ? debug_smp_processor_id+0x20/0x20 [ 30.312689][ T363] ? debug_smp_processor_id+0x20/0x20 [ 30.317900][ T363] ? switch_mm_irqs_off+0x325/0xab0 [ 30.323078][ T363] ? _raw_spin_unlock_irq+0x4a/0x60 [ 30.328201][ T363] ? finish_task_switch+0x130/0x590 [ 30.333242][ T363] fuse_dev_write+0x15b/0x1e0 [ 30.337738][ T363] ? fuse_dev_read+0x220/0x220 [ 30.342334][ T363] ? cgroup_update_frozen+0x157/0xab0 [ 30.347543][ T363] ? cgroup_leave_frozen+0x13c/0x290 [ 30.352657][ T363] ? iov_iter_init+0x82/0x160 [ 30.357184][ T363] __vfs_write+0x5d3/0x750 [ 30.361423][ T363] ? __kernel_write+0x350/0x350 [ 30.366135][ T363] ? selinux_file_permission+0x2be/0x530 [ 30.371601][ T363] ? security_file_permission+0x117/0x2f0 [ 30.377135][ T363] vfs_write+0x206/0x4e0 [ 30.381214][ T363] ksys_write+0x199/0x2c0 [ 30.385383][ T363] ? do_syscall_64+0x1c0/0x1c0 [ 30.389980][ T363] ? __ia32_sys_read+0x80/0x80 [ 30.394578][ T363] do_syscall_64+0xca/0x1c0 [ 30.398921][ T363] entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 30.404656][ T363] Modules linked in: [ 30.408376][ T363] CR2: ffffed105c5c55ff [ 30.412400][ T363] ---[ end trace 0c0537fd75ec3f71 ]--- [ 30.417698][ T363] RIP: 0010:fuse_dev_do_write+0x21f0/0x4e00 [ 30.423547][ T363] Code: d0 b3 ff 4d 8b 3f 4c 89 e0 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 cc 26 00 00 45 8b 24 24 41 ff cc 4d 01 fc 4c 89 e0 48 c1 e8 03 <0f> b6 04 18 84 c0 0f 85 cd 26 00 00 41 c6 04 24 00 41 80 3c 1e 00 [ 30.443266][ T363] RSP: 0018:ffff8881dfb0f7e0 EFLAGS: 00010a07 [ 30.449291][ T363] RAX: 1ffff1105c5c55ff RBX: dffffc0000000000 RCX: ffff8881e2db5e80 [ 30.457488][ T363] RDX: 0000000000000000 RSI: 00000000000007e0 RDI: 00000000000007e0 [ 30.465262][ T363] RBP: ffff8881dfb0fb30 R08: ffffffff81e005b0 R09: fffff94000ef44ff [ 30.473592][ T363] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8882e2e2afff [ 30.481762][ T363] R13: 0000000000000010 R14: 1ffff1103c5c4d70 R15: ffff8881e2e2b000 [ 30.489573][ T363] FS: 00007f84fb3ab700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 30.498327][ T363] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.504756][ T363] CR2: ffffed105c5c55ff CR3: 00000001e2e2d000 CR4: 00000000003406a0 [ 30.512688][ T363] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.520494][ T363] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.528299][ T363] Kernel panic - not syncing: Fatal exception [ 30.534638][ T363] Kernel Offset: disabled [ 30.538771][ T363] Rebooting in 86400 seconds..