loop0: detected capacity change from 0 to 512 ================================================================================ UBSAN: shift-out-of-bounds in fs/ext4/super.c:4351:27 shift exponent 59 is too large for 32-bit type 'int' CPU: 0 PID: 526 Comm: syz-executor.0 Not tainted 6.1.57-syzkaller-1150596-gac90f0829243 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 dump_stack+0x15/0x17 lib/dump_stack.c:113 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_shift_out_of_bounds+0x3e1/0x440 lib/ubsan.c:321 ext4_handle_clustersize+0x593/0x5c0 fs/ext4/super.c:4351 __ext4_fill_super fs/ext4/super.c:5212 [inline] ext4_fill_super+0x49ed/0x8460 fs/ext4/super.c:5651 get_tree_bdev+0x440/0x680 fs/super.c:1357 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5681 vfs_get_tree+0x88/0x290 fs/super.c:1564 do_new_mount+0x28b/0xad0 fs/namespace.c:3040 path_mount+0x671/0x1070 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3568 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3b71c7e3ea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3b7291fee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f3b7291ff80 RCX: 00007f3b71c7e3ea RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007f3b7291ff40 RBP: 0000000020000040 R08: 00007f3b7291ff80 R09: 0000000000004500 R10: 0000000000004500 R11: 0000000000000246 R12: 0000000020000080 R13: 00007f3b7291ff40 R14: 00000000000004dc R15: 00000000200000c0 ================================================================================ EXT4-fs (loop0): fragment/cluster size (0) != block size (4096)