loop3: detected capacity change from 0 to 512 EXT2-fs (loop3): (no)user_xattr optionsnot supported ================================================================================ UBSAN: shift-out-of-bounds in fs/ext2/super.c:1015:40 shift exponent 256 is too large for 32-bit type 'int' CPU: 1 PID: 7153 Comm: syz-executor.3 Not tainted 6.4.0-rc2-syzkaller-gf1fcbaa18b28 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_shift_out_of_bounds+0x2f4/0x36c lib/ubsan.c:387 ext2_fill_super+0x2270/0x2450 fs/ext2/super.c:1015 mount_bdev+0x26c/0x368 fs/super.c:1380 ext2_mount+0x44/0x58 fs/ext2/super.c:1491 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3039 path_mount+0x590/0xe04 fs/namespace.c:3369 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3568 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 ================================================================================ EXT2-fs (loop3): error: can't find an ext2 filesystem on dev loop3.