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UBSAN: shift-out-of-bounds in fs/ext4/mballoc.c:2727:26
shift exponent 60 is too large for 32-bit type 'int'
CPU: 1 PID: 10406 Comm: syz-executor.0 Not tainted 5.8.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x78/0xa0 lib/dump_stack.c:118
 ubsan_epilogue+0x5/0x40 lib/ubsan.c:148
 __ubsan_handle_shift_out_of_bounds.cold.13+0x14/0x98 lib/ubsan.c:395
 ext4_mb_init_backend fs/ext4/mballoc.c:2727 [inline]
 ext4_mb_init.cold.58+0x51/0xc5 fs/ext4/mballoc.c:2910
 ext4_fill_super+0x23bc/0x4180 fs/ext4/super.c:4709
 mount_bdev+0x178/0x1b0 fs/super.c:1417
 legacy_get_tree+0x28/0x60 fs/fs_context.c:592
 vfs_get_tree+0x1d/0xd0 fs/super.c:1547
 do_new_mount fs/namespace.c:2874 [inline]
 do_mount+0x83f/0xa50 fs/namespace.c:3199
 __do_sys_mount fs/namespace.c:3409 [inline]
 __se_sys_mount fs/namespace.c:3386 [inline]
 __x64_sys_mount+0xbf/0xe0 fs/namespace.c:3386
 do_syscall_64+0x50/0xd0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x460c6a
Code: Bad RIP value.
RSP: 002b:00007f49f1e56a78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f49f1e56b10 RCX: 0000000000460c6a
RDX: 0000000020000000 RSI: 0000000020000180 RDI: 00007f49f1e56ad0
RBP: 00007f49f1e56ad0 R08: 00007f49f1e56b10 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000
R13: 0000000020000180 R14: 0000000020000200 R15: 0000000020000040
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