./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor848956985 <...> Warning: Permanently added '10.128.0.212' (ED25519) to the list of known hosts. execve("./syz-executor848956985", ["./syz-executor848956985"], 0x7ffdcd5124f0 /* 10 vars */) = 0 brk(NULL) = 0x55559070f000 brk(0x55559070fd00) = 0x55559070fd00 arch_prctl(ARCH_SET_FS, 0x55559070f380) = 0 set_tid_address(0x55559070f650) = 5873 set_robust_list(0x55559070f660, 24) = 0 rseq(0x55559070fca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor848956985", 4096) = 27 getrandom("\xd6\x3f\xec\x23\xe7\xa0\xeb\xe2", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55559070fd00 brk(0x555590730d00) = 0x555590730d00 brk(0x555590731000) = 0x555590731000 mprotect(0x7fe72ffbb000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55559070f650) = 5874 ./strace-static-x86_64: Process 5874 attached [pid 5874] set_robust_list(0x55559070f660, 24) = 0 [pid 5874] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5874] setpgid(0, 0) = 0 [pid 5874] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5874] write(3, "1000", 4) = 4 [pid 5874] close(3) = 0 [pid 5874] write(1, "executing program\n", 18executing program ) = 18 [pid 5874] creat("./file0", 000) = 3 [pid 5874] pipe2([4, 5], 0) = 0 [pid 5874] 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 5874] dup(5) = 6 [pid 5874] 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 5874] 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 5874] mount(NULL, "./file0", "9p", MS_NOATIME|MS_POSIXACL, "trans=fd,rfdno=0x0000000000000004,wfdno=0x0000000000000006") = 0 [pid 5874] chmod("./file0", 000) = 0 [pid 5874] open("./file0", O_WRONLY) = -1 EIO (Input/output error) [pid 5874] openat(AT_FDCWD, "blkio.bfq.io_wait_time", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 7 [pid 5874] ftruncate(7, 33554441) = 0 [pid 5874] sendfile(-1, 7, NULL, 2147479552) = -1 EBADF (Bad file descriptor) [pid 5874] exit_group(0) = ? [pid 5874] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5874, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5876 attached , child_tidptr=0x55559070f650) = 5876 [pid 5876] set_robust_list(0x55559070f660, 24) = 0 [pid 5876] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5876] setpgid(0, 0) = 0 [pid 5876] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5876] write(3, "1000", 4) = 4 [pid 5876] close(3) = 0 executing program [pid 5876] write(1, "executing program\n", 18) = 18 [pid 5876] creat("./file0", 000) = -1 EIO (Input/output error) [pid 5876] pipe2([3, 4], 0) = 0 [pid 5876] 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 5876] dup(4) = 5 [pid 5876] 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 5876] 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 5876] mount(NULL, "./file0", "9p", MS_NOATIME|MS_POSIXACL, "trans=fd,rfdno=0x0000000000000003,wfdno=0x0000000000000005") = 0 [pid 5876] chmod("./file0", 000) = 0 [pid 5876] open("./file0", O_WRONLY) = -1 EIO (Input/output error) [pid 5876] openat(AT_FDCWD, "blkio.bfq.io_wait_time", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 6 [pid 5876] ftruncate(6, 33554441) = 0 [pid 5876] sendfile(-1, 6, NULL, 2147479552) = -1 EBADF (Bad file descriptor) [pid 5876] exit_group(0) = ? [pid 5876] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5876, si_uid=0, si_status=0, si_utime=0, si_stime=43 /* 0.43 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5877 attached , child_tidptr=0x55559070f650) = 5877 [pid 5877] set_robust_list(0x55559070f660, 24) = 0 [pid 5877] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5877] setpgid(0, 0) = 0 [pid 5877] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5877] write(3, "1000", 4) = 4 [pid 5877] close(3) = 0 [pid 5877] write(1, "executing program\n", 18executing program ) = 18 [pid 5877] creat("./file0", 000) = -1 EIO (Input/output error) [pid 5877] pipe2([3, 4], 0) = 0 [pid 5877] 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 5877] dup(4) = 5 [pid 5877] 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 5877] 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 5877] mount(NULL, "./file0", "9p", MS_NOATIME|MS_POSIXACL, "trans=fd,rfdno=0x0000000000000003,wfdno=0x0000000000000005") = 0 [pid 5877] chmod("./file0", 000) = 0 [pid 5877] open("./file0", O_WRONLY) = 6 [pid 5877] openat(AT_FDCWD, "blkio.bfq.io_wait_time", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 7 [pid 5877] ftruncate(7, 33554441) = 0 [ 612.169904][ T5877] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI [ 612.182570][ T5877] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 612.190998][ T5877] CPU: 0 UID: 0 PID: 5877 Comm: syz-executor848 Not tainted 6.13.0-rc6-next-20250107-syzkaller #0 [ 612.201582][ T5877] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 612.211637][ T5877] RIP: 0010:iter_file_splice_write+0xe07/0x1510 [ 612.217912][ T5877] Code: 00 00 fc ff df 41 80 3c 06 00 49 89 c6 74 08 4c 89 e7 e8 fc 12 df ff 49 c7 04 24 00 00 00 00 48 83 c3 08 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 ea 11 df ff 48 8b 44 24 20 48 8b [ 612.237630][ T5877] RSP: 0018:ffffc900040df780 EFLAGS: 00010202 [ 612.243709][ T5877] RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000000000 [ 612.251681][ T5877] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 7ffffffffffeffff [ 612.259653][ T5877] RBP: ffffc900040dfa30 R08: ffffffff824676b4 R09: 1ffffd40003ba33e [ 612.267625][ T5877] R10: dffffc0000000000 R11: fffff940003ba33f R12: ffff88807abf5810 [ 612.275601][ T5877] R13: 0000000000000000 R14: dffffc0000000000 R15: 7ffffffffffeffff [ 612.283577][ T5877] FS: 000055559070f380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 [ 612.292508][ T5877] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 612.299093][ T5877] CR2: 00005610d9d128c8 CR3: 000000007a338000 CR4: 00000000003526f0 [ 612.307069][ T5877] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 612.315041][ T5877] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 612.323016][ T5877] Call Trace: [ 612.326306][ T5877] [ 612.329238][ T5877] ? __die_body+0x5f/0xb0 [ 612.333582][ T5877] ? die_addr+0xb0/0xe0 [ 612.337747][ T5877] ? exc_general_protection+0x3dd/0x5d0 [ 612.343321][ T5877] ? asm_exc_general_protection+0x26/0x30 [ 612.349067][ T5877] ? iter_file_splice_write+0xd84/0x1510 [ 612.354713][ T5877] ? iter_file_splice_write+0xe07/0x1510 [ 612.360371][ T5877] ? __pfx_iter_file_splice_write+0x10/0x10 [ 612.366307][ T5877] ? rcu_read_lock_any_held+0xb7/0x160 [ 612.371781][ T5877] ? __pfx_iter_file_splice_write+0x10/0x10 [ 612.377695][ T5877] direct_splice_actor+0x11b/0x220 [ 612.382825][ T5877] splice_direct_to_actor+0x586/0xc80 [ 612.388212][ T5877] ? __pfx_direct_splice_actor+0x10/0x10 [ 612.393856][ T5877] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 612.399766][ T5877] do_splice_direct+0x289/0x3e0 [ 612.404722][ T5877] ? __pfx_do_splice_direct+0x10/0x10 [ 612.410110][ T5877] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 612.416007][ T5877] ? rw_verify_area+0x243/0x630 [ 612.420867][ T5877] do_sendfile+0x564/0x8a0 [ 612.425291][ T5877] ? __pfx_do_sendfile+0x10/0x10 [ 612.430234][ T5877] ? _raw_spin_unlock_irq+0x2e/0x50 [ 612.435442][ T5877] ? ptrace_notify+0x279/0x380 [ 612.440208][ T5877] __se_sys_sendfile64+0x17c/0x1e0 [ 612.445320][ T5877] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 612.450955][ T5877] ? do_syscall_64+0x100/0x230 [ 612.455727][ T5877] do_syscall_64+0xf3/0x230 [ 612.460259][ T5877] ? clear_bhb_loop+0x35/0x90 [ 612.464964][ T5877] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 612.470892][ T5877] RIP: 0033:0x7fe72ff47ef9 [ 612.475330][ T5877] 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 [ 612.494942][ T5877] RSP: 002b:00007ffcea4ff808 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 612.503364][ T5877] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fe72ff47ef9 [ 612.511339][ T5877] RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006 [ 612.519310][ T5877] RBP: 00007fe72ff9104e R08: 0000000000000006 R09: 0000000000000006 [ 612.527303][ T5877] R10: 000000007ffff000 R11: 0000000000000246 R12: 00007ffcea4ff81c [ 612.535288][ T5877] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 612.543279][ T5877] [ 612.546339][ T5877] Modules linked in: [ 612.550513][ T5877] ---[ end trace 0000000000000000 ]--- [ 612.556364][ T5877] RIP: 0010:iter_file_splice_write+0xe07/0x1510 [ 612.562738][ T5877] Code: 00 00 fc ff df 41 80 3c 06 00 49 89 c6 74 08 4c 89 e7 e8 fc 12 df ff 49 c7 04 24 00 00 00 00 48 83 c3 08 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 ea 11 df ff 48 8b 44 24 20 48 8b [ 612.582434][ T5877] RSP: 0018:ffffc900040df780 EFLAGS: 00010202 [ 612.588530][ T5877] RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000000000 [ 612.596588][ T5877] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 7ffffffffffeffff [ 612.604628][ T5877] RBP: ffffc900040dfa30 R08: ffffffff824676b4 R09: 1ffffd40003ba33e [ 612.612778][ T5877] R10: dffffc0000000000 R11: fffff940003ba33f R12: ffff88807abf5810 [ 612.620769][ T5877] R13: 0000000000000000 R14: dffffc0000000000 R15: 7ffffffffffeffff [ 612.628784][ T5877] FS: 000055559070f380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 [ 612.637746][ T5877] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 612.644370][ T5877] CR2: 00007fe72ff9101d CR3: 000000007a338000 CR4: 00000000003526f0 [ 612.652414][ T5877] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 612.660398][ T5877] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 612.668462][ T5877] Kernel panic - not syncing: Fatal exception [ 612.674856][ T5877] Kernel Offset: disabled [ 612.679179][ T5877] Rebooting in 86400 seconds..