[ 15.209649][ T3892] 8021q: adding VLAN 0 to HW filter on device bond0 [ 15.218511][ T3892] eql: remember to turn off Van-Jacobson compression on your slave devices [ 15.265603][ T151] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 15.270877][ T109] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.239' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.042737][ T4216] loop0: detected capacity change from 0 to 512 [ 36.047256][ T4216] ================================================================================ [ 36.049263][ T4216] UBSAN: shift-out-of-bounds in fs/ext2/super.c:948:25 [ 36.050667][ T4216] shift exponent 63 is too large for 32-bit type 'int' [ 36.052102][ T4216] CPU: 1 PID: 4216 Comm: syz-executor241 Not tainted 6.1.27-syzkaller #0 [ 36.053834][ T4216] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 [ 36.055996][ T4216] Call trace: [ 36.056641][ T4216] dump_backtrace+0x1c8/0x1f4 [ 36.057646][ T4216] show_stack+0x2c/0x3c [ 36.058586][ T4216] dump_stack_lvl+0x108/0x170 [ 36.059572][ T4216] dump_stack+0x1c/0x5c [ 36.060454][ T4216] __ubsan_handle_shift_out_of_bounds+0x2f4/0x36c [ 36.061812][ T4216] ext2_fill_super+0x2074/0x23fc [ 36.062798][ T4216] mount_bdev+0x26c/0x368 [ 36.063735][ T4216] ext2_mount+0x44/0x58 [ 36.064593][ T4216] legacy_get_tree+0xd4/0x16c [ 36.065545][ T4216] vfs_get_tree+0x90/0x274 [ 36.066470][ T4216] do_new_mount+0x25c/0x8c8 [ 36.067481][ T4216] path_mount+0x590/0xe58 [ 36.068448][ T4216] __arm64_sys_mount+0x45c/0x594 [ 36.069462][ T4216] invoke_syscall+0x98/0x2c0 [ 36.070459][ T4216] el0_svc_common+0x138/0x258 [ 36.071445][ T4216] do_el0_svc+0x64/0x218 [ 36.072381][ T4216] el0_svc+0x58/0x168 [ 36.073242][ T4216] el0t_64_sync_handler+0x84/0xf0 [ 36.074301][ T4216] el0t_64_sync+0x18c/0x190 [ 36.075474][ T4216] ================================================================================ [ 36.077435][ T4216] EXT2-fs (loop0): error: bad blocksize 0