./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2631024371 <...> Warning: Permanently added '10.128.1.74' (ED25519) to the list of known hosts. execve("./syz-executor2631024371", ["./syz-executor2631024371"], 0x7ffd1592c940 /* 10 vars */) = 0 brk(NULL) = 0x555575c20000 brk(0x555575c20e00) = 0x555575c20e00 arch_prctl(ARCH_SET_FS, 0x555575c20480) = 0 set_tid_address(0x555575c20750) = 5847 set_robust_list(0x555575c20760, 24) = 0 rseq(0x555575c20da0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2631024371", 4096) = 28 getrandom("\x50\x31\x11\x5a\x0f\x72\xd4\x11", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555575c20e00 brk(0x555575c41e00) = 0x555575c41e00 brk(0x555575c42000) = 0x555575c42000 mprotect(0x7f1326843000, 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=0x7f1326794a60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f132679d1b0}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f1326794a60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f132679d1b0}, NULL, 8) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5848 attached [pid 5848] set_robust_list(0x555575c20760, 24) = 0 [pid 5848] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5847] <... clone resumed>, child_tidptr=0x555575c20750) = 5848 [pid 5848] setpgid(0, 0) = 0 [pid 5848] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5848] write(3, "1000", 4) = 4 [pid 5848] close(3executing program ) = 0 [pid 5848] write(1, "executing program\n", 18) = 18 [pid 5848] memfd_create("syzkaller", 0) = 3 [pid 5848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f131e383000 [pid 5848] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 20699119) = 20699119 [pid 5848] munmap(0x7f131e383000, 138412032) = 0 [pid 5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5848] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5848] close(3) = 0 [pid 5848] close(4) = 0 [pid 5848] mkdir("./file1", 0777) = 0 [ 107.524639][ T5848] loop0: detected capacity change from 0 to 40427 [ 107.577479][ T5848] F2FS-fs (loop0): invalid crc value [pid 5848] mount("/dev/loop0", "./file1", "f2fs", 0, "active_logs=4,data_flush,fastboot,jqfmt=vfsv1,noinline_dentry,usrjquota=f2fs") = 0 [pid 5848] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5848] chdir("./file1") = 0 [pid 5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5848] mkdir("./file0", 0777) = 0 [pid 5848] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5848] mount(".", "./file0/../file0", NULL, MS_RDONLY|MS_SYNCHRONOUS|MS_DIRSYNC|MS_BIND|MS_SHARED, NULL) = 0 [ 107.688754][ T5848] F2FS-fs (loop0): f2fs_recover_fsync_data: recovery fsync data, check_only: 0 [ 107.692397][ T5848] F2FS-fs (loop0): Mounted with checkpoint version = 48b305e4 [ 107.736417][ T5848] Oops: gen[ 107.736417][ T5848] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI [ 107.736444][ T5848] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 107.736472][ T5848] CPU: 1 UID: 0 PID: 5848 Comm: syz-executor263 Tainted: G W 6.17.0-rc1-syzkaller-00014-g0e39a731820a #0 PREEMPT_{RT,(full)} [ 107.736504][ T5848] Tainted: [W]=WARN [ 107.736509][ T5848] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 107.736519][ T5848] RIP: 0010:strcmp+0x3c/0xc0 [ 107.736549][ T5848] Code: 00 fc ff df 45 31 f6 4a 8d 04 37 48 89 c1 48 c1 e9 03 0f b6 0c 19 84 c9 75 2c 42 0f b6 2c 37 4a 8d 04 36 48 89 c1 48 c1 e9 03 <0f> b6 0c 19 84 c9 75 33 42 0f b6 0c 36 40 38 cd 75 48 49 ff c6 40 [ 107.736561][ T5848] RSP: 0018:ffffc90004adf8f8 EFLAGS: 00010246 [ 107.736575][ T5848] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 [ 107.736587][ T5848] RDX: 0000000021ec2c00 RSI: 0000000000000000 RDI: ffff888021ec2c80 [ 107.736598][ T5848] RBP: 0000000000000066 R08: 0000000000000000 R09: 0000000000000000 [ 107.736607][ T5848] R10: ffff88803d2c9768 R11: ffffed1007a592fb R12: 1ffff1100611a891 [ 107.736619][ T5848] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888021ec2c80 [ 107.736629][ T5848] FS: 0000555575c20480(0000) GS:ffff8881269c5000(0000) knlGS:0000000000000000 [ 107.736646][ T5848] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 107.736660][ T5848] CR2: 0000200000001000 CR3: 000000003d342000 CR4: 00000000003526f0 [ 107.736679][ T5848] Call Trace: [ 107.736686][ T5848] [ 107.736696][ T5848] f2fs_check_opt_consistency+0x1378/0x2c10 [ 107.736732][ T5848] f2fs_reconfigure+0x482/0x1770 [ 107.736810][ T5848] reconfigure_super+0x224/0x890 [ 107.736841][ T5848] path_mount+0xd18/0xfe0 [ 107.736877][ T5848] __se_sys_mount+0x317/0x410 [ 107.736912][ T5848] ? __pfx___se_sys_mount+0x10/0x10 [ 107.736944][ T5848] ? rcu_is_watching+0x15/0xb0 [ 107.736982][ T5848] ? __x64_sys_mount+0x20/0xc0 [ 107.737015][ T5848] do_syscall_64+0xfa/0x3b0 [ 107.737044][ T5848] ? lockdep_hardirqs_on+0x9c/0x150 [ 107.737070][ T5848] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 107.737087][ T5848] ? clear_bhb_loop+0x60/0xb0 [ 107.737104][ T5848] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 107.737118][ T5848] RIP: 0033:0x7f13267ca259 [ 107.737137][ T5848] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 [ 107.737150][ T5848] RSP: 002b:00007fff3d15d4a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 107.737165][ T5848] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f13267ca259 [ 107.737176][ T5848] RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000000 [ 107.737185][ T5848] RBP: 0000000000000000 R08: 0000200000000140 R09: 00007fff3d15d4e0 [ 107.737195][ T5848] R10: 0000000000000020 R11: 0000000000000246 R12: 00007fff3d15d4e0 [ 107.737205][ T5848] R13: 00007fff3d15d768 R14: 431bde82d7b634db R15: 00007f132681303b [ 107.737222][ T5848] [ 107.737227][ T5848] Modules linked in: [ 107.737314][ T5848] ---[ end trace 0000000000000000 ]--- [ 107.739370][ T5848] RIP: 0010:strcmp+0x3c/0xc0 [ 107.739415][ T5848] Code: 00 fc ff df 45 31 f6 4a 8d 04 37 48 89 c1 48 c1 e9 03 0f b6 0c 19 84 c9 75 2c 42 0f b6 2c 37 4a 8d 04 36 48 89 c1 48 c1 e9 03 <0f> b6 0c 19 84 c9 75 33 42 0f b6 0c 36 40 38 cd 75 48 49 ff c6 40 [ 107.739436][ T5848] RSP: 0018:ffffc90004adf8f8 EFLAGS: 00010246 [ 107.739457][ T5848] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 [ 107.739474][ T5848] RDX: 0000000021ec2c00 RSI: 0000000000000000 RDI: ffff888021ec2c80 [ 107.739491][ T5848] RBP: 0000000000000066 R08: 0000000000000000 R09: 0000000000000000 [ 107.739506][ T5848] R10: ffff88803d2c9768 R11: ffffed1007a592fb R12: 1ffff1100611a891 [ 107.739525][ T5848] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888021ec2c80 [ 107.739542][ T5848] FS: 0000555575c20480(0000) GS:ffff8881268c5000(0000) knlGS:0000000000000000 [ 107.739563][ T5848] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 107.739587][ T5848] CR2: 0000000000000000 CR3: 000000003d342000 CR4: 00000000003526f0 [ 107.739610][ T5848] Kernel panic - not syncing: Fatal exception [ 107.739915][ T5848] Kernel Offset: disabled