================================================================================ UBSAN: shift-out-of-bounds in fs/minix/inode.c:380:57 shift exponent 255 is too large for 64-bit type 'long unsigned int' CPU: 0 PID: 28151 Comm: syz-executor.3 Not tainted 6.3.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x136/0x150 lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_shift_out_of_bounds+0x221/0x5a0 lib/ubsan.c:387 minix_statfs.cold+0x17/0x1c fs/minix/inode.c:380 statfs_by_dentry+0x133/0x210 fs/statfs.c:66 vfs_statfs+0x3a/0x90 fs/statfs.c:90 ovl_check_namelen+0x80/0x130 fs/overlayfs/super.c:919 ovl_get_upper fs/overlayfs/super.c:1131 [inline] ovl_fill_super+0x162a/0x7270 fs/overlayfs/super.c:1986 mount_nodev+0x64/0x120 fs/super.c:1417 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x350 fs/super.c:1501 do_new_mount fs/namespace.c:3042 [inline] path_mount+0x1342/0x1e40 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3571 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7faefa88c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007faefb62d168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007faefa9abf80 RCX: 00007faefa88c0f9 RDX: 0000000020000080 RSI: 0000000020000200 RDI: 0000000000000000 RBP: 00007faefa8e7b39 R08: 00000000200002c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc2c32b44f R14: 00007faefb62d300 R15: 0000000000022000 ================================================================================