[ 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 '10.128.0.243' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 52.480546][ T8397] loop0: detected capacity change from 0 to 4096 [ 52.488607][ T8397] EXT4-fs (loop0): too many log groups per flexible block group [ 52.496529][ T8397] EXT4-fs (loop0): failed to initialize mballoc (-12) [ 52.503326][ T8397] EXT4-fs (loop0): mount failed executing program [ 57.834226][ T8407] loop0: detected capacity change from 0 to 4096 [ 57.841951][ T8407] EXT4-fs (loop0): too many log groups per flexible block group [ 57.849774][ T8407] EXT4-fs (loop0): failed to initialize mballoc (-12) [ 57.856641][ T8407] EXT4-fs (loop0): mount failed executing program [ 63.161600][ T8417] loop0: detected capacity change from 0 to 4096 [ 63.169234][ T8417] EXT4-fs (loop0): too many log groups per flexible block group [ 63.177502][ T8417] EXT4-fs (loop0): failed to initialize mballoc (-12) [ 63.184652][ T8417] EXT4-fs (loop0): mount failed executing program [ 68.467715][ T8425] loop0: detected capacity change from 0 to 4096 [ 68.475593][ T8425] EXT4-fs (loop0): too many log groups per flexible block group [ 68.483239][ T8425] EXT4-fs (loop0): failed to initialize mballoc (-12) [ 68.490066][ T8425] EXT4-fs (loop0): mount failed executing program [ 73.778994][ T8433] loop0: detected capacity change from 0 to 4096 [ 73.787666][ T8433] EXT4-fs (loop0): too many log groups per flexible block group [ 73.799144][ T8433] EXT4-fs (loop0): failed to initialize mballoc (-12) [ 73.807726][ T8433] EXT4-fs (loop0): mount failed [ 74.951792][ T8390] kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) BUG: memory leak unreferenced object 0xffff88810fd9bb00 (size 1184): comm "syz-executor193", pid 8425, jiffies 4294944107 (age 12.750s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] ext4_alloc_inode+0x19/0x1a0 [] alloc_inode+0x27/0x100 [] new_inode+0x23/0x100 [] ext4_mb_init+0x410/0x7d0 [] ext4_fill_super+0x3722/0x5b20 [] mount_bdev+0x223/0x260 [] legacy_get_tree+0x2b/0x90 [] vfs_get_tree+0x28/0x100 [] path_mount+0xc3e/0x1120 [] __x64_sys_mount+0x18e/0x1d0 [] do_syscall_64+0x2d/0x70 [] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff88810da05e00 (size 512): comm "syz-executor193", pid 8425, jiffies 4294944107 (age 12.750s) hex dump (first 32 bytes): 10 ee 5c 00 81 88 ff ff 00 00 00 00 00 00 00 00 ..\............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] ext4_mb_add_groupinfo+0x9a/0x310 [] ext4_mb_init+0x46c/0x7d0 [] ext4_fill_super+0x3722/0x5b20 [] mount_bdev+0x223/0x260 [] legacy_get_tree+0x2b/0x90 [] vfs_get_tree+0x28/0x100 [] path_mount+0xc3e/0x1120 [] __x64_sys_mount+0x18e/0x1d0 [] do_syscall_64+0x2d/0x70 [] entry_SYSCALL_64_after_hwframe+0x44/0xae