Warning: Permanently added '10.128.1.74' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 38.206195] EXT4-fs error (device loop0): ext4_fill_super:4450: inode #2: comm syz-executor356: iget: root inode unallocated [ 38.218931] EXT4-fs (loop0): get root inode failed [ 38.223934] EXT4-fs (loop0): mount failed [ 38.256417] print_req_error: I/O error, dev loop3, sector 2 [ 38.262314] EXT4-fs (loop3): unable to read superblock executing program executing program [ 38.319060] print_req_error: I/O error, dev loop1, sector 2 [ 38.325812] EXT4-fs (loop1): unable to read superblock [ 38.375180] ------------[ cut here ]------------ [ 38.379963] kernel BUG at fs/buffer.c:3049! [ 38.384285] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 38.389644] CPU: 1 PID: 8143 Comm: syz-executor356 Not tainted 4.19.211-syzkaller #0 [ 38.397500] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.406841] RIP: 0010:submit_bh_wbc+0x5e5/0x760 [ 38.411509] Code: 10 4c 8d 7b 20 48 89 44 24 08 e9 3e fc ff ff e8 41 98 b1 ff f0 80 63 01 f7 e9 4d fb ff ff e8 32 98 b1 ff 0f 0b e8 2b 98 b1 ff <0f> 0b e8 24 98 b1 ff 0f 0b e8 1d 98 b1 ff 0f 0b e8 16 98 b1 ff 0f [ 38.430496] RSP: 0000:ffff8880b16578f8 EFLAGS: 00010293 [ 38.435848] RAX: ffff8880b1396440 RBX: ffff88808b046888 RCX: ffffffff81b0e7d1 [ 38.443101] RDX: 0000000000000000 RSI: ffffffff81b0ed45 RDI: 0000000000000001 [ 38.450358] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 38.457608] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000003000 [ 38.465038] R13: 0000000000000000 R14: 0000000000000000 R15: 00000000c1d136f0 [ 38.472287] FS: 00007f47202b8700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 38.480493] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.486368] CR2: 0000000020000000 CR3: 00000000982c2000 CR4: 00000000003406e0 [ 38.493617] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.500863] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.508105] Call Trace: [ 38.510677] read_mmp_block+0x133/0x610 [ 38.514636] ext4_multi_mount_protect+0x4f6/0xac0 [ 38.519459] ? __dump_mmp_msg+0xa0/0xa0 [ 38.523416] ? __lockdep_init_map+0x100/0x5a0 [ 38.527892] ? __lockdep_init_map+0x100/0x5a0 [ 38.532375] ext4_fill_super+0xa050/0xc850 [ 38.536605] ? ext4_calculate_overhead+0x11c0/0x11c0 [ 38.541686] ? snprintf+0xbb/0xf0 [ 38.545116] ? wait_for_completion_io+0x10/0x10 [ 38.549789] ? set_blocksize+0x163/0x3f0 [ 38.553842] mount_bdev+0x2fc/0x3b0 [ 38.557445] ? ext4_calculate_overhead+0x11c0/0x11c0 [ 38.562524] mount_fs+0xa3/0x310 [ 38.565869] vfs_kern_mount.part.0+0x68/0x470 [ 38.570344] do_mount+0x115c/0x2f50 [ 38.573954] ? rcu_nmi_exit+0xb3/0x180 [ 38.577821] ? retint_kernel+0x2d/0x2d [ 38.581686] ? copy_mount_string+0x40/0x40 [ 38.585899] ? copy_mount_options+0x1cd/0x380 [ 38.590377] ? __sanitizer_cov_trace_const_cmp2+0x20/0x20 [ 38.595902] ? copy_mount_options+0x26f/0x380 [ 38.600374] ksys_mount+0xcf/0x130 [ 38.603999] __x64_sys_mount+0xba/0x150 [ 38.607952] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 38.612512] do_syscall_64+0xf9/0x620 [ 38.616302] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.621467] RIP: 0033:0x7f472030cdaa [ 38.625157] Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 38.644039] RSP: 002b:00007f47202b8108 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 [ 38.651730] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f472030cdaa [ 38.658981] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f47202b8170 [ 38.666247] RBP: 0000000000000004 R08: 00007f47202b81b0 R09: 0000000000000000 [ 38.673491] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 [ 38.680761] R13: 00000000200003c8 R14: 00007f47202b8170 R15: 0000000020000100 [ 38.688021] Modules linked in: [ 38.695531] ---[ end trace f40f609face4e015 ]--- [ 38.700428] RIP: 0010:submit_bh_wbc+0x5e5/0x760 executing program executing program executing program executing program executing program executing program [ 38.711525] Code: 10 4c 8d 7b 20 48 89 44 24 08 e9 3e fc ff ff e8 41 98 b1 ff f0 80 63 01 f7 e9 4d fb ff ff e8 32 98 b1 ff 0f 0b e8 2b 98 b1 ff <0f> 0b e8 24 98 b1 ff 0f 0b e8 1d 98 b1 ff 0f 0b e8 16 98 b1 ff 0f [ 38.732162] RSP: 0000:ffff8880b16578f8 EFLAGS: 00010293 [ 38.737913] RAX: ffff8880b1396440 RBX: ffff88808b046888 RCX: ffffffff81b0e7d1 [ 38.745916] RDX: 0000000000000000 RSI: ffffffff81b0ed45 RDI: 0000000000000001 [ 38.754436] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 38.765912] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000003000 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.777871] R13: 0000000000000000 R14: 0000000000000000 R15: 00000000c1d136f0 [ 38.792878] FS: 00007f47202b8700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 38.813446] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.823175] CR2: 00007f4720371f8c CR3: 00000000982c2000 CR4: 00000000003406e0 [ 38.836650] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.858978] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.872750] Kernel panic - not syncing: Fatal exception [ 38.878332] Kernel Offset: disabled [ 38.881950] Rebooting in 86400 seconds..