./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2996749111 <...> Warning: Permanently added '10.128.0.192' (ED25519) to the list of known hosts. execve("./syz-executor2996749111", ["./syz-executor2996749111"], 0x7ffdf5b7d4e0 /* 10 vars */) = 0 brk(NULL) = 0x55558bbcb000 brk(0x55558bbcbd00) = 0x55558bbcbd00 arch_prctl(ARCH_SET_FS, 0x55558bbcb380) = 0 set_tid_address(0x55558bbcb650) = 5850 set_robust_list(0x55558bbcb660, 24) = 0 rseq(0x55558bbcbca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2996749111", 4096) = 28 getrandom("\xd0\x74\xe9\x91\x66\x9e\x8c\xf6", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558bbcbd00 brk(0x55558bbecd00) = 0x55558bbecd00 brk(0x55558bbed000) = 0x55558bbed000 mprotect(0x7f79f3131000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5851 attached , child_tidptr=0x55558bbcb650) = 5851 [pid 5851] set_robust_list(0x55558bbcb660, 24) = 0 [pid 5851] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5851] setpgid(0, 0) = 0 [pid 5851] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5851] write(3, "1000", 4) = 4 [pid 5851] close(3) = 0 [pid 5851] write(1, "executing program\n", 18executing program ) = 18 [pid 5851] creat("./file0", 000) = 3 [pid 5851] pipe2([4, 5], 0) = 0 [pid 5851] write(5, "\x15\x00\x00\x00\x65\xff\xff\x04\x80\x00\x00\x08\x00\x39\x50\x32\x30\x30\x30\x00\x00", 21) = 21 [pid 5851] dup(5) = 6 [pid 5851] write(6, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 24) = 24 [pid 5851] write(6, "\x4c\x01\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 311) = 311 [pid 5851] mount(NULL, "./file0", "9p", 0, "trans=fd,rfdno=0x0000000000000004,wfdno=0x0000000000000006") = 0 [pid 5851] chmod("./file0", 000) = 0 [pid 5851] open("./file0", O_WRONLY) = 7 [pid 5851] openat(AT_FDCWD, "blkio.throttle.io_serviced", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 8 [pid 5851] ftruncate(8, 5) = 0 [pid 5851] sendfile(7, 8, NULL, 2147479552) = 5 [pid 5851] exit_group(0) = ? [pid 5851] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5851, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5853 attached , child_tidptr=0x55558bbcb650) = 5853 [pid 5853] set_robust_list(0x55558bbcb660, 24) = 0 [pid 5853] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5853] setpgid(0, 0) = 0 [pid 5853] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5853] write(3, "1000", 4) = 4 [pid 5853] close(3) = 0 executing program [pid 5853] write(1, "executing program\n", 18) = 18 [pid 5853] creat("./file0", 000) = -1 ENOENT (No such file or directory) [pid 5853] pipe2([3, 4], 0) = 0 [pid 5853] write(4, "\x15\x00\x00\x00\x65\xff\xff\x04\x80\x00\x00\x08\x00\x39\x50\x32\x30\x30\x30\x00\x00", 21) = 21 [pid 5853] dup(4) = 5 [pid 5853] write(5, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 24) = 24 [pid 5853] write(5, "\x4c\x01\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 311) = 311 [pid 5853] mount(NULL, "./file0", "9p", 0, "trans=fd,rfdno=0x0000000000000003,wfdno=0x0000000000000005") = 0 [pid 5853] chmod("./file0", 000) = 0 [pid 5853] open("./file0", O_WRONLY) = 6 [pid 5853] openat(AT_FDCWD, "blkio.throttle.io_serviced", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 7 [pid 5853] ftruncate(7, 5) = 0 [pid 5853] sendfile(6, 7, NULL, 2147479552) = 5 [pid 5853] exit_group(0) = ? [pid 5853] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5853, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5854 attached , child_tidptr=0x55558bbcb650) = 5854 [pid 5854] set_robust_list(0x55558bbcb660, 24) = 0 [pid 5854] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5854] setpgid(0, 0) = 0 [pid 5854] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5854] write(3, "1000", 4) = 4 [pid 5854] close(3) = 0 executing program [pid 5854] write(1, "executing program\n", 18) = 18 [pid 5854] creat("./file0", 000) = -1 ENOENT (No such file or directory) [pid 5854] pipe2([3, 4], 0) = 0 [pid 5854] write(4, "\x15\x00\x00\x00\x65\xff\xff\x04\x80\x00\x00\x08\x00\x39\x50\x32\x30\x30\x30\x00\x00", 21) = 21 [pid 5854] dup(4) = 5 [pid 5854] write(5, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 24) = 24 [pid 5854] write(5, "\x4c\x01\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 311) = 311 [pid 5854] mount(NULL, "./file0", "9p", 0, "trans=fd,rfdno=0x0000000000000003,wfdno=0x0000000000000005") = 0 [pid 5854] chmod("./file0", 000) = 0 [pid 5854] open("./file0", O_WRONLY) = -1 EIO (Input/output error) [pid 5854] openat(AT_FDCWD, "blkio.throttle.io_serviced", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 6 [pid 5854] ftruncate(6, 5) = 0 [pid 5854] sendfile(-1, 6, NULL, 2147479552) = -1 EBADF (Bad file descriptor) [pid 5854] exit_group(0) = ? [pid 5854] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5854, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5855 attached , child_tidptr=0x55558bbcb650) = 5855 [pid 5855] set_robust_list(0x55558bbcb660, 24) = 0 [pid 5855] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5855] setpgid(0, 0) = 0 [pid 5855] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5855] write(3, "1000", 4) = 4 [pid 5855] close(3) = 0 executing program [pid 5855] write(1, "executing program\n", 18) = 18 [pid 5855] creat("./file0", 000) = -1 EIO (Input/output error) [pid 5855] pipe2([3, 4], 0) = 0 [pid 5855] write(4, "\x15\x00\x00\x00\x65\xff\xff\x04\x80\x00\x00\x08\x00\x39\x50\x32\x30\x30\x30\x00\x00", 21) = 21 [pid 5855] dup(4) = 5 [pid 5855] write(5, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 24) = 24 [pid 5855] write(5, "\x4c\x01\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 311) = 311 [pid 5855] mount(NULL, "./file0", "9p", 0, "trans=fd,rfdno=0x0000000000000003,wfdno=0x0000000000000005") = 0 [pid 5855] chmod("./file0", 000) = 0 [pid 5855] open("./file0", O_WRONLY) = 6 [pid 5855] openat(AT_FDCWD, "blkio.throttle.io_serviced", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 7 [pid 5855] ftruncate(7, 5) = 0 [ 89.574956][ T5855] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN PTI [ 89.586889][ T5855] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 89.595311][ T5855] CPU: 1 UID: 0 PID: 5855 Comm: syz-executor299 Not tainted 6.16.0-next-20250731-syzkaller #0 PREEMPT(full) [ 89.607022][ T5855] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 89.617195][ T5855] RIP: 0010:iter_file_splice_write+0xa9b/0x1000 [ 89.623515][ T5855] Code: 00 74 08 4c 89 f7 e8 54 36 df ff 49 8b 1e 49 c7 06 00 00 00 00 48 83 c3 08 48 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df <42> 80 3c 30 00 44 8b 64 24 04 74 08 48 89 df e8 21 36 df ff 4c 8b [ 89.643217][ T5855] RSP: 0018:ffffc90004027820 EFLAGS: 00010202 [ 89.649310][ T5855] RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88803371bc00 [ 89.657371][ T5855] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 7ffffffffffffffa [ 89.665436][ T5855] RBP: ffffc90004027a30 R08: ffffea000047a937 R09: 1ffffd400008f526 [ 89.673407][ T5855] R10: dffffc0000000000 R11: fffff9400008f527 R12: dffffc0000000000 [ 89.681382][ T5855] R13: 7ffffffffffffffa R14: dffffc0000000000 R15: ffff88807e70c028 [ 89.689442][ T5855] FS: 000055558bbcb380(0000) GS:ffff88812590a000(0000) knlGS:0000000000000000 [ 89.698388][ T5855] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 89.705068][ T5855] CR2: 00007ffe76465248 CR3: 000000007edd2000 CR4: 00000000003526f0 [ 89.713084][ T5855] Call Trace: [ 89.716386][ T5855] [ 89.719328][ T5855] ? __pfx_iter_file_splice_write+0x10/0x10 [ 89.725235][ T5855] ? rcu_read_lock_any_held+0xb3/0x120 [ 89.730699][ T5855] ? __pfx_iter_file_splice_write+0x10/0x10 [ 89.736688][ T5855] direct_splice_actor+0x101/0x160 [ 89.741804][ T5855] splice_direct_to_actor+0x5a5/0xcc0 [ 89.747189][ T5855] ? __pfx_direct_splice_actor+0x10/0x10 [ 89.752917][ T5855] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 89.758903][ T5855] do_splice_direct+0x181/0x270 [ 89.763800][ T5855] ? __pfx_do_splice_direct+0x10/0x10 [ 89.769171][ T5855] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 89.775156][ T5855] ? rw_verify_area+0x255/0x4d0 [ 89.780008][ T5855] do_sendfile+0x4da/0x7e0 [ 89.784456][ T5855] ? __pfx_do_sendfile+0x10/0x10 [ 89.789423][ T5855] ? _raw_spin_unlock_irq+0x2e/0x50 [ 89.794740][ T5855] ? ptrace_notify+0x22d/0x2c0 [ 89.799513][ T5855] __se_sys_sendfile64+0x13e/0x190 [ 89.804630][ T5855] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 89.810264][ T5855] ? rcu_is_watching+0x15/0xb0 [ 89.815048][ T5855] do_syscall_64+0xfa/0x3b0 [ 89.819830][ T5855] ? lockdep_hardirqs_on+0x9c/0x150 [ 89.825036][ T5855] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 89.831101][ T5855] ? clear_bhb_loop+0x60/0xb0 [ 89.835864][ T5855] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 89.841852][ T5855] RIP: 0033:0x7f79f30bdef9 [ 89.846266][ T5855] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 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 [ 89.865870][ T5855] RSP: 002b:00007ffe76465348 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 89.874282][ T5855] RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007f79f30bdef9 [ 89.882259][ T5855] RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006 [ 89.890226][ T5855] RBP: 0030656c69662f2e R08: 0000000000000006 R09: 0000000000000006 [ 89.898195][ T5855] R10: 000000007ffff000 R11: 0000000000000246 R12: 0000200000000180 [ 89.906162][ T5855] R13: 00007f79f310704e R14: 0000000000000001 R15: 0000000000000001 [ 89.914139][ T5855] [ 89.917156][ T5855] Modules linked in: [ 89.921172][ T5855] ---[ end trace 0000000000000000 ]--- [ 89.926772][ T5855] RIP: 0010:iter_file_splice_write+0xa9b/0x1000 [ 89.933163][ T5855] Code: 00 74 08 4c 89 f7 e8 54 36 df ff 49 8b 1e 49 c7 06 00 00 00 00 48 83 c3 08 48 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df <42> 80 3c 30 00 44 8b 64 24 04 74 08 48 89 df e8 21 36 df ff 4c 8b [ 89.953015][ T5855] RSP: 0018:ffffc90004027820 EFLAGS: 00010202 [ 89.959196][ T5855] RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88803371bc00 [ 89.967168][ T5855] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 7ffffffffffffffa [ 89.975348][ T5855] RBP: ffffc90004027a30 R08: ffffea000047a937 R09: 1ffffd400008f526 [ 89.983591][ T5855] R10: dffffc0000000000 R11: fffff9400008f527 R12: dffffc0000000000 [ 89.991778][ T5855] R13: 7ffffffffffffffa R14: dffffc0000000000 R15: ffff88807e70c028 [ 89.999874][ T5855] FS: 000055558bbcb380(0000) GS:ffff88812580a000(0000) knlGS:0000000000000000 [ 90.008984][ T5855] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 90.015597][ T5855] CR2: 00007f79f30f0e00 CR3: 000000007edd2000 CR4: 00000000003526f0 [ 90.023603][ T5855] Kernel panic - not syncing: Fatal exception [ 90.030080][ T5855] Kernel Offset: disabled [ 90.034489][ T5855] Rebooting in 86400 seconds..