[ OK ] Reached target Login Prompts. [ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.174' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 49.516462][ T8439] loop0: detected capacity change from 4096 to 0 [ 49.525096][ T8439] Quota error (device loop0): v2_read_file_info: Free block number too big (0 >= 0). [ 49.534704][ T8439] EXT4-fs warning (device loop0): ext4_enable_quotas:6430: Failed to enable quota tracking (type=0, err=-117). Please run e2fsck to fix. [ 49.548909][ T8439] EXT4-fs (loop0): mount failed [ 55.475737][ T8438] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak) BUG: memory leak unreferenced object 0xffff88810f790400 (size 64): comm "syz-executor858", pid 8439, jiffies 4294942213 (age 8.030s) hex dump (first 32 bytes): 00 c0 ce 09 81 88 ff ff 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 0a 00 00 00 48 00 00 00 ............H... backtrace: [<0000000079b4242b>] v2_read_file_info+0x1ae/0x430 [<000000009b7feeff>] dquot_load_quota_sb+0x351/0x650 [<000000006cffeb4a>] dquot_load_quota_inode+0xda/0x160 [<000000009363a0fd>] ext4_enable_quotas+0x1b2/0x2f0 [<00000000e7128892>] ext4_fill_super+0x3fa5/0x5ad0 [<00000000429c3b37>] mount_bdev+0x223/0x260 [<00000000324ae63e>] legacy_get_tree+0x2b/0x90 [<000000000e09bb04>] vfs_get_tree+0x28/0x100 [<0000000040e74429>] path_mount+0xc5e/0x1170 [<0000000004cd6635>] __x64_sys_mount+0x18e/0x1d0 [<00000000368cb408>] do_syscall_64+0x2d/0x70 [<000000008709cff7>] entry_SYSCALL_64_after_hwframe+0x44/0xa9