./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2382307827 <...> Warning: Permanently added '10.128.1.76' (ED25519) to the list of known hosts. execve("./syz-executor2382307827", ["./syz-executor2382307827"], 0x7fff332953a0 /* 10 vars */) = 0 brk(NULL) = 0x555561e22000 brk(0x555561e22d00) = 0x555561e22d00 arch_prctl(ARCH_SET_FS, 0x555561e22380) = 0 set_tid_address(0x555561e22650) = 5859 set_robust_list(0x555561e22660, 24) = 0 rseq(0x555561e22ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2382307827", 4096) = 28 getrandom("\xec\x76\x2c\xd3\x2b\x78\x39\xa7", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555561e22d00 brk(0x555561e43d00) = 0x555561e43d00 brk(0x555561e44000) = 0x555561e44000 mprotect(0x7f94aadee000, 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./strace-static-x86_64: Process 5860 attached , child_tidptr=0x555561e22650) = 5860 [pid 5860] set_robust_list(0x555561e22660, 24) = 0 [pid 5860] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5860] setpgid(0, 0) = 0 [pid 5860] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5860] write(3, "1000", 4) = 4 [pid 5860] close(3) = 0 [pid 5860] write(1, "executing program\n", 18executing program ) = 18 [pid 5860] creat("./file0", 000) = 3 [pid 5860] pipe2([4, 5], 0) = 0 [pid 5860] 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 5860] dup(5) = 6 [pid 5860] 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 5860] 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 5860] mount(NULL, "./file0", "9p", MS_NOATIME|MS_POSIXACL, "trans=fd,rfdno=0x0000000000000004,wfdno=0x0000000000000006") = -1 EIO (Input/output error) [pid 5860] chmod("./file0", 000) = 0 [pid 5860] open("./file0", O_WRONLY) = 7 [pid 5860] openat(AT_FDCWD, "blkio.bfq.io_wait_time", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 8 [pid 5860] ftruncate(8, 33554441) = 0 [pid 5860] sendfile(7, 8, NULL, 2147479552) = 33554441 [pid 5860] exit_group(0) = ? [pid 5860] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5860, si_uid=0, si_status=0, si_utime=0, si_stime=53 /* 0.53 s */} --- clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5862 attached , child_tidptr=0x555561e22650) = 5862 [pid 5862] set_robust_list(0x555561e22660, 24) = 0 [pid 5862] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5862] setpgid(0, 0) = 0 [pid 5862] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5862] write(3, "1000", 4) = 4 [pid 5862] close(3) = 0 [pid 5862] write(1, "executing program\n", 18executing program ) = 18 [pid 5862] creat("./file0", 000) = 3 [pid 5862] pipe2([4, 5], 0) = 0 [pid 5862] 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 5862] dup(5) = 6 [pid 5862] 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 5862] 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 5862] mount(NULL, "./file0", "9p", MS_NOATIME|MS_POSIXACL, "trans=fd,rfdno=0x0000000000000004,wfdno=0x0000000000000006") = 0 [pid 5862] chmod("./file0", 000) = 0 [pid 5862] open("./file0", O_WRONLY) = 7 [pid 5862] openat(AT_FDCWD, "blkio.bfq.io_wait_time", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 8 [pid 5862] ftruncate(8, 33554441) = 0 [ 295.910823][ T5862] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI [ 295.923546][ T5862] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 295.931974][ T5862] CPU: 1 UID: 0 PID: 5862 Comm: syz-executor238 Not tainted 6.13.0-rc6-next-20250107-syzkaller #0 [ 295.942558][ T5862] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 295.952726][ T5862] RIP: 0010:iter_file_splice_write+0xe07/0x1510 [ 295.959031][ T5862] 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 [ 295.978646][ T5862] RSP: 0018:ffffc9000401f780 EFLAGS: 00010202 [ 295.984807][ T5862] RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000000000 [ 295.993049][ T5862] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 7ffffffffffeffff [ 296.001025][ T5862] RBP: ffffc9000401fa30 R08: ffffffff824676b4 R09: 1ffffd40003e17ae [ 296.009019][ T5862] R10: dffffc0000000000 R11: fffff940003e17af R12: ffff88807ec83010 [ 296.017136][ T5862] R13: 0000000000000000 R14: dffffc0000000000 R15: 7ffffffffffeffff [ 296.025132][ T5862] FS: 0000555561e22380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 [ 296.034091][ T5862] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 296.040692][ T5862] CR2: 00007f94aad8db60 CR3: 00000000786e8000 CR4: 00000000003526f0 [ 296.048678][ T5862] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 296.056651][ T5862] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 296.064624][ T5862] Call Trace: [ 296.067914][ T5862] [ 296.070849][ T5862] ? __die_body+0x5f/0xb0 [ 296.075192][ T5862] ? die_addr+0xb0/0xe0 [ 296.079363][ T5862] ? exc_general_protection+0x3dd/0x5d0 [ 296.084954][ T5862] ? asm_exc_general_protection+0x26/0x30 [ 296.090694][ T5862] ? iter_file_splice_write+0xd84/0x1510 [ 296.096360][ T5862] ? iter_file_splice_write+0xe07/0x1510 [ 296.102032][ T5862] ? __pfx_iter_file_splice_write+0x10/0x10 [ 296.107946][ T5862] ? rcu_read_lock_any_held+0xb7/0x160 [ 296.113512][ T5862] ? __pfx_iter_file_splice_write+0x10/0x10 [ 296.119419][ T5862] direct_splice_actor+0x11b/0x220 [ 296.124548][ T5862] splice_direct_to_actor+0x586/0xc80 [ 296.129941][ T5862] ? __pfx_direct_splice_actor+0x10/0x10 [ 296.135596][ T5862] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 296.141515][ T5862] do_splice_direct+0x289/0x3e0 [ 296.146378][ T5862] ? __pfx_do_splice_direct+0x10/0x10 [ 296.151761][ T5862] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 296.157673][ T5862] ? rw_verify_area+0x243/0x630 [ 296.162533][ T5862] do_sendfile+0x564/0x8a0 [ 296.166960][ T5862] ? __pfx_do_sendfile+0x10/0x10 [ 296.171904][ T5862] ? _raw_spin_unlock_irq+0x2e/0x50 [ 296.177120][ T5862] ? ptrace_notify+0x279/0x380 [ 296.181888][ T5862] __se_sys_sendfile64+0x17c/0x1e0 [ 296.187011][ T5862] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 296.192735][ T5862] ? do_syscall_64+0x100/0x230 [ 296.197508][ T5862] do_syscall_64+0xf3/0x230 [ 296.202017][ T5862] ? clear_bhb_loop+0x35/0x90 [ 296.206708][ T5862] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 296.212639][ T5862] RIP: 0033:0x7f94aad7aef9 [ 296.217078][ T5862] 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 [ 296.236706][ T5862] RSP: 002b:00007ffe4385ab98 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 296.245157][ T5862] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f94aad7aef9 [ 296.253151][ T5862] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000007 [ 296.261132][ T5862] RBP: 00007f94aadc404e R08: 0000000000000006 R09: 0000000000000006 [ 296.269114][ T5862] R10: 000000007ffff000 R11: 0000000000000246 R12: 00007ffe4385abac [ 296.277120][ T5862] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 296.285119][ T5862] [ 296.288157][ T5862] Modules linked in: [ 296.292262][ T5862] ---[ end trace 0000000000000000 ]--- [ 296.297854][ T5862] RIP: 0010:iter_file_splice_write+0xe07/0x1510 [ 296.304150][ T5862] 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 [ 296.324099][ T5862] RSP: 0018:ffffc9000401f780 EFLAGS: 00010202 [ 296.330277][ T5862] RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000000000 [ 296.338569][ T5862] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 7ffffffffffeffff [ 296.346585][ T5862] RBP: ffffc9000401fa30 R08: ffffffff824676b4 R09: 1ffffd40003e17ae [ 296.354702][ T5862] R10: dffffc0000000000 R11: fffff940003e17af R12: ffff88807ec83010 [ 296.362735][ T5862] R13: 0000000000000000 R14: dffffc0000000000 R15: 7ffffffffffeffff [ 296.370859][ T5862] FS: 0000555561e22380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 [ 296.379856][ T5862] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 296.386457][ T5862] CR2: 0000563a32552788 CR3: 00000000786e8000 CR4: 00000000003526f0 [ 296.394536][ T5862] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 296.402573][ T5862] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 296.410608][ T5862] Kernel panic - not syncing: Fatal exception [ 296.417141][ T5862] Kernel Offset: disabled [ 296.421480][ T5862] Rebooting in 86400 seconds..