./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3847287281 <...> [ 2.707527][ T24] audit: type=1400 audit(1688246565.200:9): avc: denied { append open } for pid=75 comm="syslogd" path="/tmp/messages" dev="tmpfs" ino=2 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 2.710520][ T24] audit: type=1400 audit(1688246565.200:10): avc: denied { getattr } for pid=75 comm="syslogd" path="/tmp/messages" dev="tmpfs" ino=2 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 2.904373][ T92] udevd[92]: starting version 3.2.11 [ 2.954697][ T93] udevd[93]: starting eudev-3.2.11 [ 11.255058][ T24] kauditd_printk_skb: 50 callbacks suppressed [ 11.255064][ T24] audit: type=1400 audit(1688246573.760:61): avc: denied { transition } for pid=228 comm="sshd" path="/bin/sh" dev="sda1" ino=89 scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 11.258870][ T24] audit: type=1400 audit(1688246573.770:62): avc: denied { noatsecure } for pid=228 comm="sshd" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 11.261381][ T24] audit: type=1400 audit(1688246573.770:63): avc: denied { write } for pid=228 comm="sh" path="pipe:[12949]" dev="pipefs" ino=12949 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 11.264393][ T24] audit: type=1400 audit(1688246573.770:64): avc: denied { rlimitinh } for pid=228 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 11.267008][ T24] audit: type=1400 audit(1688246573.770:65): avc: denied { siginh } for pid=228 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.196' (ECDSA) to the list of known hosts. execve("./syz-executor3847287281", ["./syz-executor3847287281"], 0x7ffdbf2dcba0 /* 10 vars */) = 0 brk(NULL) = 0x555556472000 brk(0x555556472c40) = 0x555556472c40 arch_prctl(ARCH_SET_FS, 0x555556472300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 set_tid_address(0x5555564725d0) = 297 set_robust_list(0x5555564725e0, 24) = 0 rt_sigaction(SIGRTMIN, {sa_handler=0x7fe9423832f0, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7fe9423839c0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7fe942383390, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fe9423839c0}, 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-executor3847287281", 4096) = 28 brk(0x555556493c40) = 0x555556493c40 brk(0x555556494000) = 0x555556494000 mprotect(0x7fe942445000, 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(0x7fe94244b4cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fe942353000 mprotect(0x7fe942354000, 131072, PROT_READ|PROT_WRITE) = 0 clone(child_stack=0x7fe9423733f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[298], tls=0x7fe942373700, child_tidptr=0x7fe9423739d0) = 298 futex(0x7fe94244b4c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 futex(0x7fe94244b4cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 298 attached [pid 298] set_robust_list(0x7fe9423739e0, 24) = 0 [pid 298] mkdir("./file0", 000) = 0 [pid 298] futex(0x7fe94244b4cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 297] <... futex resumed>) = 0 [pid 297] futex(0x7fe94244b4c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 297] futex(0x7fe94244b4cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 298] <... futex resumed>) = 1 [pid 298] openat(AT_FDCWD, "/dev/fuse", O_RDWR|O_CREAT, 000) = 3 [pid 298] futex(0x7fe94244b4cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 297] <... futex resumed>) = 0 [pid 297] futex(0x7fe94244b4c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 297] futex(0x7fe94244b4cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 298] <... futex resumed>) = 1 [pid 298] mount(NULL, "./file0", "fuse", 0, "fd=0x0000000000000003,rootmode=00000000000000000040000,user_id=00000000000000000000,group_id=0000000"...) = 0 [pid 298] futex(0x7fe94244b4cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 297] <... futex resumed>) = 0 [pid 297] futex(0x7fe94244b4c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 297] futex(0x7fe94244b4cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 298] <... futex resumed>) = 1 [pid 298] 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 298] futex(0x7fe94244b4cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 297] <... futex resumed>) = 0 [pid 297] futex(0x7fe94244b4c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 297] futex(0x7fe94244b4cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 298] <... futex resumed>) = 1 [pid 298] unlink("./file0/file0" [pid 297] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 297] futex(0x7fe94244b4cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 297] futex(0x7fe94244b4cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 297] futex(0x7fe94244b4dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 297] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fe942332000 [pid 297] mprotect(0x7fe942333000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 297] clone(child_stack=0x7fe9423523f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[300], tls=0x7fe942352700, child_tidptr=0x7fe9423529d0) = 300 [pid 297] futex(0x7fe94244b4d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 297] futex(0x7fe94244b4dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 300 attached [pid 300] set_robust_list(0x7fe9423529e0, 24) = 0 [pid 300] 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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 300] futex(0x7fe94244b4dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 297] <... futex resumed>) = 0 [pid 297] futex(0x7fe94244b4d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 297] futex(0x7fe94244b4dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 300] <... futex resumed>) = 1 [pid 300] 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\x2a\x01\x00\x00\x00\x00\x00\x00\x66\x69\x6c\x65\x30\x00", 8192) = 46 [pid 300] write(3, "\x92\x00\x00\x00\x00\x00\x00\x00\x04\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\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\x00\x00\x00\x00\x08\x00\x00\x00\x00\x00\x00\x00"..., 146) = 146 [pid 300] futex(0x7fe94244b4dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [ 20.123529][ T24] audit: type=1400 audit(1688246582.630:66): avc: denied { execmem } for pid=297 comm="syz-executor384" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.128154][ T24] audit: type=1400 audit(1688246582.640:67): avc: denied { read write } for pid=297 comm="syz-executor384" 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 [ 20.132018][ T24] audit: type=1400 audit(1688246582.640:68): avc: denied { open } for pid=297 comm="syz-executor384" 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 [ 20.135081][ T24] audit: type=1400 audit(1688246582.640:69): avc: denied { mounton } for pid=297 comm="syz-executor384" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 20.138070][ T24] audit: type=1400 audit(1688246582.640:70): avc: denied { mount } for pid=297 comm="syz-executor384" name="/" dev="fuse" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [pid 300] futex(0x7fe94244b4d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 297] <... futex resumed>) = 0 [ 20.182204][ T298] general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN [ 20.193718][ T298] KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] [ 20.201965][ T298] CPU: 0 PID: 298 Comm: syz-executor384 Not tainted 5.10.184-syzkaller-01138-g28cc6246b5e7 #0 [ 20.212115][ T298] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 20.222026][ T298] RIP: 0010:do_unlinkat+0x3b2/0x8b0 [ 20.227049][ T298] Code: de e8 92 1b b7 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 22 2b f4 ff 49 8b 45 30 48 89 44 24 28 4c [ 20.246522][ T298] RSP: 0018:ffffc90000b27da0 EFLAGS: 00010206 [ 20.252388][ T298] RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffff88811e2da780 [ 20.260196][ T298] RDX: ffff88811e2da780 RSI: 0000000000000000 RDI: 0000000000000032 [ 20.268018][ T298] RBP: ffffc90000b27f18 R08: ffffffff81b36983 R09: ffffed1021ffe82e [pid 297] exit_group(0) = ? [pid 300] <... futex resumed>) = ? [pid 300] +++ exited with 0 +++ [ 20.275928][ T298] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 20.283741][ T298] R13: 0000000000000002 R14: 1ffff11021ffe828 R15: dffffc0000000000 [ 20.291560][ T298] FS: 00007fe942373700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 20.300326][ T298] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.306738][ T298] CR2: 000000002000a000 CR3: 000000011e3f6000 CR4: 00000000003506b0 [ 20.314550][ T298] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.322362][ T298] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.330169][ T298] Call Trace: [ 20.333306][ T298] ? __die_body+0x62/0xb0 [ 20.337466][ T298] ? die_addr+0x9f/0xd0 [ 20.341460][ T298] ? exc_general_protection+0x3ff/0x490 [ 20.346848][ T298] ? asm_exc_general_protection+0x1e/0x30 [ 20.352392][ T298] ? do_unlinkat+0x333/0x8b0 [ 20.356818][ T298] ? do_unlinkat+0x3b2/0x8b0 [ 20.361333][ T298] ? fsnotify_link_count+0x90/0x90 [ 20.366280][ T298] ? strncpy_from_user+0x18e/0x2d0 [ 20.371225][ T298] ? getname_flags+0x1fd/0x520 [ 20.375824][ T298] __x64_sys_unlink+0x49/0x50 [ 20.380343][ T298] do_syscall_64+0x34/0x70 [ 20.384591][ T298] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 20.390327][ T298] RIP: 0033:0x7fe9423c14a9 [ 20.394571][ T298] 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 [ 20.414015][ T298] RSP: 002b:00007fe9423732f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [ 20.422258][ T298] RAX: ffffffffffffffda RBX: 00007fe94244b4c0 RCX: 00007fe9423c14a9 [ 20.430068][ T298] RDX: 00007fe9423c14a9 RSI: 00000000000f4240 RDI: 0000000020000100 [ 20.437879][ T298] RBP: 00007fe942419024 R08: 0000000000000000 R09: 0000000000000000 [ 20.445690][ T298] R10: 0000000000000030 R11: 0000000000000246 R12: 00007fff952f03ce [ 20.453503][ T298] R13: 00007fe942419040 R14: 0000000800000000 R15: 00007fe94244b4c8 [ 20.461312][ T298] Modules linked in: [ 20.465207][ T298] ---[ end trace 789a1eac0345dbcb ]--- [ 20.470534][ T298] RIP: 0010:do_unlinkat+0x3b2/0x8b0 [ 20.475495][ T298] Code: de e8 92 1b b7 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 22 2b f4 ff 49 8b 45 30 48 89 44 24 28 4c [ 20.494984][ T298] RSP: 0018:ffffc90000b27da0 EFLAGS: 00010206 [ 20.500846][ T298] RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffff88811e2da780 [ 20.508686][ T298] RDX: ffff88811e2da780 RSI: 0000000000000000 RDI: 0000000000000032 [ 20.516490][ T298] RBP: ffffc90000b27f18 R08: ffffffff81b36983 R09: ffffed1021ffe82e [ 20.524265][ T298] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 20.532113][ T298] R13: 0000000000000002 R14: 1ffff11021ffe828 R15: dffffc0000000000 [ 20.539901][ T298] FS: 00007fe942373700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 20.548681][ T298] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.555078][ T298] CR2: 00007fe942416c28 CR3: 000000011e3f6000 CR4: 00000000003506a0 [ 20.562912][ T298] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.570709][ T298] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.578529][ T298] Kernel panic - not syncing: Fatal exception [ 20.584563][ T298] Kernel Offset: disabled [ 20.588679][ T298] Rebooting in 86400 seconds..