./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor840185411 <...> Warning: Permanently added '10.128.0.134' (ED25519) to the list of known hosts. execve("./syz-executor840185411", ["./syz-executor840185411"], 0x7ffd61f5c4a0 /* 10 vars */) = 0 brk(NULL) = 0x55557bad6000 brk(0x55557bad6e00) = 0x55557bad6e00 arch_prctl(ARCH_SET_FS, 0x55557bad6480) = 0 set_tid_address(0x55557bad6750) = 289 set_robust_list(0x55557bad6760, 24) = 0 rseq(0x55557bad6da0, 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-executor840185411", 4096) = 27 getrandom("\x50\x40\x19\x26\xcc\x91\x58\xb2", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557bad6e00 brk(0x55557baf7e00) = 0x55557baf7e00 brk(0x55557baf8000) = 0x55557baf8000 mprotect(0x7f7f378e3000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 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=0x7f7f3783dbe0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f7f37844f60}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f7f3783dbe0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f7f37844f60}, NULL, 8) = 0 executing program write(1, "executing program\n", 18) = 18 mkdirat(AT_FDCWD, "./file0", 000) = 0 mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0 openat(-1, ".pending_reads", O_RDONLY) = -1 EBADF (Bad file descriptor) mkdir("./file0", 0777) = -1 EEXIST (File exists) mount(NULL, "./file0", 0x200000000000, MS_REMOUNT, "") = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 chdir("./file0") = 0 mprotect(0x200000000000, 16384, PROT_READ) = 0 --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x200000000040} --- --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x200000000000} --- [ 23.134982][ T24] audit: type=1400 audit(1744336047.770:66): avc: denied { execmem } for pid=289 comm="syz-executor840" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.156623][ T24] audit: type=1400 audit(1744336047.790:67): avc: denied { mounton } for pid=289 comm="syz-executor840" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 23.160399][ T289] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN [ 23.179837][ T24] audit: type=1400 audit(1744336047.790:68): avc: denied { mount } for pid=289 comm="syz-executor840" name="/" dev="incremental-fs" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [ 23.190626][ T289] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 23.190639][ T289] CPU: 0 PID: 289 Comm: syz-executor840 Not tainted 5.10.234-syzkaller-00157-ge0b88ee5f09c #0 [ 23.190645][ T289] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 23.190677][ T289] RIP: 0010:dir_rename_wrap+0xf7/0x570 [ 23.190688][ T289] Code: 4c 89 e7 e8 1b 1d 9d ff 49 8b 1c 24 eb 07 e8 a0 7d 5f ff 31 db 48 83 c3 08 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 eb 1c 9d ff 48 8b 1b 48 85 db 0f 84 [ 23.190696][ T289] RSP: 0018:ffffc90000b07b20 EFLAGS: 00010202 [ 23.190709][ T289] RAX: 0000000000000001 RBX: 0000000000000008 RCX: dffffc0000000000 [ 23.190725][ T289] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.214014][ T24] audit: type=1400 audit(1744336047.790:69): avc: denied { remount } for pid=289 comm="syz-executor840" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [ 23.222225][ T289] RBP: ffffc90000b07b90 R08: ffffffff820b418a R09: fffff52000160f55 [ 23.222233][ T289] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88810cd87298 [ 23.222247][ T289] R13: ffff88810cd87550 R14: ffff88811ad40860 R15: ffff88811ad40800 [ 23.232319][ T24] audit: type=1400 audit(1744336047.790:70): avc: denied { write } for pid=289 comm="syz-executor840" name="/" dev="incremental-fs" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 23.242184][ T289] FS: 000055557bad6480(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 23.242192][ T289] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.242206][ T289] CR2: 0000200000000000 CR3: 000000011c2b7000 CR4: 00000000003506b0 [ 23.247484][ T24] audit: type=1400 audit(1744336047.790:71): avc: denied { remove_name } for pid=289 comm="syz-executor840" name=".pending_reads" dev="incremental-fs" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 23.267015][ T289] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.267021][ T289] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.267048][ T289] Call Trace: [ 23.273017][ T24] audit: type=1400 audit(1744336047.790:72): avc: denied { rename } for pid=289 comm="syz-executor840" name=".pending_reads" dev="incremental-fs" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 [ 23.280820][ T289] ? __die_body+0x62/0xb0 [ 23.280837][ T289] ? die_addr+0x9f/0xd0 [ 23.288645][ T24] audit: type=1400 audit(1744336047.790:73): avc: denied { add_name } for pid=289 comm="syz-executor840" name="fuse" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 23.308694][ T289] ? exc_general_protection+0x3ff/0x490 [ 23.308710][ T289] ? asm_exc_general_protection+0x1e/0x30 [ 23.308722][ T289] ? dir_rename_wrap+0x9a/0x570 [ 23.308743][ T289] ? dir_rename_wrap+0xf7/0x570 [ 23.495681][ T289] ? try_break_deleg+0x7c/0x120 [ 23.500351][ T289] vfs_rename+0x9fb/0xeb0 [ 23.504705][ T289] ? __ia32_sys_link+0x70/0x70 [ 23.509296][ T289] ? __lookup_hash+0x151/0x290 [ 23.513900][ T289] do_renameat2+0xa56/0x1240 [ 23.518429][ T289] ? fsnotify_move+0x290/0x290 [ 23.523044][ T289] ? getname_flags+0x1fd/0x520 [ 23.527606][ T289] __x64_sys_rename+0x86/0x90 [ 23.532207][ T289] do_syscall_64+0x34/0x70 [ 23.536557][ T289] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 23.542278][ T289] RIP: 0033:0x7f7f37870bc9 [ 23.546528][ T289] Code: 48 83 c4 28 c3 e8 67 17 00 00 0f 1f 80 00 00 00 00 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 [ 23.566473][ T289] RSP: 002b:00007fff9c17cf48 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 [ 23.574706][ T289] RAX: ffffffffffffffda RBX: 0073646165725f67 RCX: 00007f7f37870bc9 [ 23.582552][ T289] RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000200000000040 [ 23.590484][ T289] RBP: 00007fff9c17cf58 R08: 00007fff9c17cf58 R09: 00007f7f3783dbe0 [ 23.598284][ T289] R10: 00007fff9c17cf50 R11: 0000000000000246 R12: 0000000000000000 [ 23.606183][ T289] R13: 00007fff9c17d1b8 R14: 0000000000000001 R15: 0000000000000001 [ 23.614178][ T289] Modules linked in: [ 23.618190][ T289] ---[ end trace bb7d646a8180b957 ]--- [ 23.623612][ T289] RIP: 0010:dir_rename_wrap+0xf7/0x570 [ 23.628832][ T289] Code: 4c 89 e7 e8 1b 1d 9d ff 49 8b 1c 24 eb 07 e8 a0 7d 5f ff 31 db 48 83 c3 08 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 eb 1c 9d ff 48 8b 1b 48 85 db 0f 84 [ 23.648416][ T289] RSP: 0018:ffffc90000b07b20 EFLAGS: 00010202 [ 23.654537][ T289] RAX: 0000000000000001 RBX: 0000000000000008 RCX: dffffc0000000000 [ 23.662383][ T289] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 23.670183][ T289] RBP: ffffc90000b07b90 R08: ffffffff820b418a R09: fffff52000160f55 [ 23.677958][ T289] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88810cd87298 [ 23.685942][ T289] R13: ffff88810cd87550 R14: ffff88811ad40860 R15: ffff88811ad40800 [ 23.693862][ T289] FS: 000055557bad6480(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 23.702768][ T289] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.709223][ T289] CR2: 0000200000000000 CR3: 000000011c2b7000 CR4: 00000000003506b0 [ 23.717090][ T289] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.724875][ T289] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.732797][ T289] Kernel panic - not syncing: Fatal exception [ 23.738751][ T289] Kernel Offset: disabled [ 23.742843][ T289] Rebooting in 86400 seconds..