./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3304575584 <...> Warning: Permanently added '10.128.0.4' (ED25519) to the list of known hosts. execve("./syz-executor3304575584", ["./syz-executor3304575584"], 0x7ffe1c763210 /* 10 vars */) = 0 brk(NULL) = 0x5555792e0000 brk(0x5555792e0d00) = 0x5555792e0d00 arch_prctl(ARCH_SET_FS, 0x5555792e0380) = 0 set_tid_address(0x5555792e0650) = 5075 set_robust_list(0x5555792e0660, 24) = 0 rseq(0x5555792e0ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3304575584", 4096) = 28 getrandom("\x0b\x90\x84\x4b\x80\x98\x0b\x1b", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555792e0d00 brk(0x555579301d00) = 0x555579301d00 brk(0x555579302000) = 0x555579302000 mprotect(0x7f7c2bbf5000, 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 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7c23600000 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"..., 262144) = 262144 munmap(0x7f7c23600000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./bus", 0777) = 0 [ 78.749229][ T5075] loop0: detected capacity change from 0 to 512 [ 78.802218][ T5075] UDF-fs: warning (device loop0): udf_load_vrs: No VRS found [ 78.810129][ T5075] UDF-fs: Scanning with blocksize 512 failed [ 78.817520][ T5075] UDF-fs: warning (device loop0): udf_load_vrs: No VRS found [ 78.825742][ T5075] UDF-fs: Scanning with blocksize 1024 failed [ 78.832918][ T5075] UDF-fs: warning (device loop0): udf_load_vrs: No VRS found [ 78.841003][ T5075] UDF-fs: Scanning with blocksize 2048 failed mount("/dev/loop0", "./bus", "udf", MS_STRICTATIME, "") = 0 openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 chdir("./bus") = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|FASYNC, 000) = 4 [ 78.847886][ T5075] UDF-fs: error (device loop0): udf_read_tagged: read failed, block=256, location=256 [ 78.860762][ T5075] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) ftruncate(4, 100663296) = 0 openat(AT_FDCWD, "memory.events", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = -1 EIO (Input/output error) [ 78.937927][ T5075] ------------[ cut here ]------------ [ 78.943788][ T5075] kernel BUG at fs/buffer.c:2768! [ 78.949536][ T5075] invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI [ 78.955991][ T5075] CPU: 1 PID: 5075 Comm: syz-executor330 Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0 [ 78.966429][ T5075] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 78.976682][ T5075] RIP: 0010:submit_bh_wbc+0x546/0x560 [ 78.982089][ T5075] Code: 04 7c ff be 00 10 00 00 48 c7 c7 80 ad 47 8e 4c 89 fa e8 1d 33 c6 02 e9 95 fe ff ff e8 93 04 7c ff 90 0f 0b e8 8b 04 7c ff 90 <0f> 0b e8 83 04 7c ff 90 0f 0b e8 7b 04 7c ff 90 0f 0b e8 73 04 7c [ 79.001715][ T5075] RSP: 0018:ffffc9000340f858 EFLAGS: 00010293 [ 79.007797][ T5075] RAX: ffffffff8219fbe5 RBX: 0000000000000000 RCX: ffff88802f7b9e00 [ 79.015790][ T5075] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 79.023771][ T5075] RBP: 0000000000000000 R08: ffffffff8219f743 R09: 1ffff1100ee296cb [ 79.031750][ T5075] R10: dffffc0000000000 R11: ffffed100ee296cc R12: 0000000000000000 [ 79.039725][ T5075] R13: ffff88807714b658 R14: 0000000000000000 R15: 1ffff1100ee296cb [ 79.047704][ T5075] FS: 00005555792e0380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 [ 79.056820][ T5075] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 79.063474][ T5075] CR2: 000000000066c7e0 CR3: 0000000075a64000 CR4: 00000000003506f0 [ 79.071452][ T5075] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 79.079446][ T5075] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 79.087418][ T5075] Call Trace: [ 79.090705][ T5075] [ 79.093637][ T5075] ? __die_body+0x88/0xe0 [ 79.097972][ T5075] ? die+0xcf/0x110 [ 79.101781][ T5075] ? do_trap+0x15a/0x3a0 [ 79.106111][ T5075] ? submit_bh_wbc+0x546/0x560 [ 79.110921][ T5075] ? do_error_trap+0x1dc/0x2c0 [ 79.115709][ T5075] ? submit_bh_wbc+0x546/0x560 [ 79.120488][ T5075] ? __pfx_do_error_trap+0x10/0x10 [ 79.125613][ T5075] ? handle_invalid_op+0x34/0x40 [ 79.130559][ T5075] ? submit_bh_wbc+0x546/0x560 [ 79.135330][ T5075] ? exc_invalid_op+0x38/0x50 [ 79.140061][ T5075] ? asm_exc_invalid_op+0x1a/0x20 [ 79.145887][ T5075] ? submit_bh_wbc+0xa3/0x560 [ 79.150608][ T5075] ? submit_bh_wbc+0x545/0x560 [ 79.155397][ T5075] ? submit_bh_wbc+0x546/0x560 [ 79.160172][ T5075] ? submit_bh_wbc+0x545/0x560 [ 79.164966][ T5075] __block_write_begin_int+0x12d0/0x1a70 [ 79.170636][ T5075] ? __pfx_udf_get_block+0x10/0x10 [ 79.175774][ T5075] ? __pfx___block_write_begin_int+0x10/0x10 [ 79.181770][ T5075] ? __pfx_udf_get_block+0x10/0x10 [ 79.186914][ T5075] block_write_begin+0x9b/0x1e0 [ 79.191777][ T5075] udf_write_begin+0x10d/0x1a0 [ 79.196562][ T5075] generic_perform_write+0x322/0x640 [ 79.201871][ T5075] ? __pfx_generic_perform_write+0x10/0x10 [ 79.207707][ T5075] ? file_update_time+0x3ac/0x3e0 [ 79.212751][ T5075] ? __generic_file_write_iter+0x105/0x230 [ 79.218593][ T5075] ? udf_file_write_iter+0x1c0/0x660 [ 79.223898][ T5075] udf_file_write_iter+0x2fd/0x660 [ 79.229024][ T5075] vfs_write+0xa84/0xcb0 [ 79.233276][ T5075] ? __pfx_vfs_write+0x10/0x10 [ 79.238110][ T5075] ? lockdep_hardirqs_on+0x99/0x150 [ 79.243368][ T5075] ? __fdget_pos+0x272/0x320 [ 79.247975][ T5075] ksys_write+0x1a0/0x2c0 [ 79.252319][ T5075] ? __pfx_ksys_write+0x10/0x10 [ 79.257189][ T5075] ? do_syscall_64+0x102/0x240 [ 79.261976][ T5075] do_syscall_64+0xf5/0x240 [ 79.266491][ T5075] ? clear_bhb_loop+0x35/0x90 [ 79.271183][ T5075] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.277084][ T5075] RIP: 0033:0x7f7c2bb82679 [ 79.281503][ T5075] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 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 [ 79.301187][ T5075] RSP: 002b:00007fff23ee0518 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 79.309635][ T5075] RAX: ffffffffffffffda RBX: 00007fff23ee06e8 RCX: 00007f7c2bb82679 [ 79.317715][ T5075] RDX: 0000000000000010 RSI: 0000000020000600 RDI: 0000000000000004 [ 79.325718][ T5075] RBP: 00007f7c2bbf5610 R08: 00007fff23ee06e8 R09: 00007fff23ee06e8 [ 79.333720][ T5075] R10: 00007fff23ee06e8 R11: 0000000000000246 R12: 0000000000000001 [ 79.341720][ T5075] R13: 00007fff23ee06d8 R14: 0000000000000001 R15: 0000000000000001 [ 79.349707][ T5075] [ 79.352747][ T5075] Modules linked in: [ 79.357409][ T5075] ---[ end trace 0000000000000000 ]--- [ 79.363139][ T5075] RIP: 0010:submit_bh_wbc+0x546/0x560 [ 79.368589][ T5075] Code: 04 7c ff be 00 10 00 00 48 c7 c7 80 ad 47 8e 4c 89 fa e8 1d 33 c6 02 e9 95 fe ff ff e8 93 04 7c ff 90 0f 0b e8 8b 04 7c ff 90 <0f> 0b e8 83 04 7c ff 90 0f 0b e8 7b 04 7c ff 90 0f 0b e8 73 04 7c [ 79.388331][ T5075] RSP: 0018:ffffc9000340f858 EFLAGS: 00010293 [ 79.394549][ T5075] RAX: ffffffff8219fbe5 RBX: 0000000000000000 RCX: ffff88802f7b9e00 [ 79.402601][ T5075] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 79.410814][ T5075] RBP: 0000000000000000 R08: ffffffff8219f743 R09: 1ffff1100ee296cb [ 79.418824][ T5075] R10: dffffc0000000000 R11: ffffed100ee296cc R12: 0000000000000000 [ 79.426893][ T5075] R13: ffff88807714b658 R14: 0000000000000000 R15: 1ffff1100ee296cb [ 79.434938][ T5075] FS: 00005555792e0380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 [ 79.444073][ T5075] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 79.450763][ T5075] CR2: 000000000066c7e0 CR3: 0000000075a64000 CR4: 00000000003506f0 [ 79.458768][ T5075] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 79.466948][ T5075] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 79.475009][ T5075] Kernel panic - not syncing: Fatal exception [ 79.481187][ T5075] Kernel Offset: disabled [ 79.485520][ T5075] Rebooting in 86400 seconds..