[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.125' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.032417] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 34.044757] audit: type=1804 audit(1677818290.446:2): pid=8117 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor387" name="/root/file0/bus" dev="loop0" ino=18 res=1 [ 34.097800] EXT4-fs error (device loop0): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 25 vs 150994969 free clusters [ 34.113098] ------------[ cut here ]------------ [ 34.117965] kernel BUG at fs/ext4/inline.c:222! [ 34.122825] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 34.128175] CPU: 1 PID: 8117 Comm: syz-executor387 Not tainted 4.19.211-syzkaller #0 [ 34.136032] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 [ 34.145376] RIP: 0010:ext4_write_inline_data+0x337/0x3d0 [ 34.150808] Code: 5f e9 5d d8 84 ff e8 58 d8 84 ff 45 8d 64 2c c4 41 bd 3c 00 00 00 41 29 ed e9 df fe ff ff e8 40 d8 84 ff 0f 0b e8 39 d8 84 ff <0f> 0b e8 02 b4 ba ff e9 f5 fd ff ff 4c 89 ff e8 f5 b3 ba ff e9 99 [ 34.169693] RSP: 0018:ffff8880950c7390 EFLAGS: 00010293 [ 34.175039] RAX: ffff88809532c180 RBX: ffff88808ac347f0 RCX: ffffffff81ddab4e [ 34.182289] RDX: 0000000000000000 RSI: ffffffff81ddad37 RDI: 0000000000000006 [ 34.189554] RBP: 000000000000056d R08: 0000000000000001 R09: 000000000000056e [ 34.196827] R10: 0000000000000006 R11: 0000000000000000 R12: 0000000000000001 [ 34.204085] R13: 000000000000056e R14: ffff8880950c7418 R15: ffff88808ac34cae [ 34.211358] FS: 00007ff3ec8cb700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 34.219570] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.225435] CR2: 00007ff3e45aa718 CR3: 00000000b0707000 CR4: 00000000003406e0 [ 34.232691] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.239962] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.247224] Call Trace: [ 34.249805] ext4_write_inline_data_end+0x228/0x650 [ 34.254894] ? ext4_try_to_write_inline_data+0x1a20/0x1a20 [ 34.260502] ? lock_downgrade+0x720/0x720 [ 34.264633] ? lock_acquire+0x170/0x3c0 [ 34.268599] ? ext4_da_write_end+0x7d2/0xa70 [ 34.272991] ext4_da_write_inline_data_end+0x30/0x4d0 [ 34.278185] ext4_da_write_end+0x4ba/0xa70 [ 34.282520] generic_perform_write+0x2ae/0x4d0 [ 34.287106] ? filemap_page_mkwrite+0x2f0/0x2f0 [ 34.291763] ? current_time+0x1c0/0x1c0 [ 34.295724] ? lock_acquire+0x170/0x3c0 [ 34.299707] __generic_file_write_iter+0x24b/0x610 [ 34.304624] ext4_file_write_iter+0x2fe/0xf20 [ 34.309104] ? kasan_kmalloc+0x139/0x160 [ 34.313151] ? ext4_file_open+0x600/0x600 [ 34.317280] ? iter_file_splice_write+0x168/0xbb0 [ 34.322115] ? direct_splice_actor+0x115/0x160 [ 34.326747] ? splice_direct_to_actor+0x33f/0x8d0 [ 34.331614] ? do_sendfile+0x550/0xc30 [ 34.335486] ? __se_sys_sendfile64+0x147/0x160 [ 34.340051] ? do_syscall_64+0xf9/0x620 [ 34.344009] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.349360] ? common_file_perm+0x4e5/0x850 [ 34.353666] do_iter_readv_writev+0x668/0x790 [ 34.358159] ? clone_verify_area+0x240/0x240 [ 34.362554] ? security_file_permission+0x1c0/0x220 [ 34.367555] do_iter_write+0x182/0x5d0 [ 34.371428] vfs_iter_write+0x70/0xa0 [ 34.375210] iter_file_splice_write+0x60d/0xbb0 [ 34.379899] ? splice_from_pipe_next.part.0+0x360/0x360 [ 34.385259] ? security_file_permission+0x1c0/0x220 [ 34.390259] ? splice_from_pipe_next.part.0+0x360/0x360 [ 34.395620] direct_splice_actor+0x115/0x160 [ 34.400021] splice_direct_to_actor+0x33f/0x8d0 [ 34.404673] ? generic_pipe_buf_nosteal+0x10/0x10 [ 34.409517] ? do_splice_to+0x160/0x160 [ 34.413488] do_splice_direct+0x1a7/0x270 [ 34.417624] ? splice_direct_to_actor+0x8d0/0x8d0 [ 34.422454] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 34.427456] do_sendfile+0x550/0xc30 [ 34.431158] ? do_compat_pwritev64+0x1b0/0x1b0 [ 34.435719] ? wait_for_completion_io+0x10/0x10 [ 34.440373] ? __se_sys_futex+0x28f/0x3b0 [ 34.444519] ? __se_sys_futex+0x298/0x3b0 [ 34.448660] __se_sys_sendfile64+0x147/0x160 [ 34.453054] ? __se_sys_sendfile+0x180/0x180 [ 34.457451] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 34.462802] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.467800] ? do_syscall_64+0x21/0x620 [ 34.471790] do_syscall_64+0xf9/0x620 [ 34.475584] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.480779] RIP: 0033:0x7ff3ec926e39 [ 34.484498] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 31 18 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 [ 34.503393] RSP: 002b:00007ff3ec8cb208 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 34.511173] RAX: ffffffffffffffda RBX: 00007ff3ec9a46c8 RCX: 00007ff3ec926e39 [ 34.518425] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 [ 34.525678] RBP: 00007ff3ec9a46c0 R08: 0000000000000000 R09: 0000000000000000 [ 34.532956] R10: 0001000000201005 R11: 0000000000000246 R12: 00007ff3ec9a46cc [ 34.540209] R13: 00007fffc53cb6bf R14: 00007ff3ec8cb300 R15: 0000000000022000 [ 34.547478] Modules linked in: [ 34.550769] ---[ end trace 052090c945a4b476 ]--- [ 34.555568] RIP: 0010:ext4_write_inline_data+0x337/0x3d0 [ 34.561020] Code: 5f e9 5d d8 84 ff e8 58 d8 84 ff 45 8d 64 2c c4 41 bd 3c 00 00 00 41 29 ed e9 df fe ff ff e8 40 d8 84 ff 0f 0b e8 39 d8 84 ff <0f> 0b e8 02 b4 ba ff e9 f5 fd ff ff 4c 89 ff e8 f5 b3 ba ff e9 99 [ 34.580019] RSP: 0018:ffff8880950c7390 EFLAGS: 00010293 [ 34.585445] RAX: ffff88809532c180 RBX: ffff88808ac347f0 RCX: ffffffff81ddab4e [ 34.592714] RDX: 0000000000000000 RSI: ffffffff81ddad37 RDI: 0000000000000006 [ 34.600052] RBP: 000000000000056d R08: 0000000000000001 R09: 000000000000056e [ 34.607474] R10: 0000000000000006 R11: 0000000000000000 R12: 0000000000000001 [ 34.614787] R13: 000000000000056e R14: ffff8880950c7418 R15: ffff88808ac34cae [ 34.622058] FS: 00007ff3ec8cb700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 34.630342] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.636274] CR2: 00007ff3e45aa718 CR3: 00000000b0707000 CR4: 00000000003406e0 [ 34.643571] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.650835] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.658272] Kernel panic - not syncing: Fatal exception [ 34.663706] Kernel Offset: disabled [ 34.667323] Rebooting in 86400 seconds..