syz.0.15[3282]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set
loop0: detected capacity change from 0 to 32768
================================================================================
UBSAN: shift-out-of-bounds in fs/bcachefs/super-io.c:626:18
shift exponent 255 is too large for 32-bit type 'int'
CPU: 0 PID: 3282 Comm: syz.0.15 Not tainted 6.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x83/0xd0 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_shift_out_of_bounds+0x247/0x270 lib/ubsan.c:387
 read_one_super+0x137/0x270 fs/bcachefs/super-io.c:626
 bch2_read_super+0x170/0x4a0 fs/bcachefs/super-io.c:715
 bch2_fs_open+0xdb/0x1520 fs/bcachefs/super.c:1897
 bch2_mount+0x273/0x5b0 fs/bcachefs/fs.c:1829
 legacy_get_tree+0x2d/0x60 fs/fs_context.c:638
 vfs_get_tree+0x24/0xb0 fs/super.c:1750
 do_new_mount+0x153/0x390 fs/namespace.c:3335
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount+0x14b/0x1c0 fs/namespace.c:3861
 do_syscall_64+0x46/0xc0
 entry_SYSCALL_64_after_hwframe+0x6f/0xd9
RIP: 0033:0x7f0c5e97f79a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0c5f7fce68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f0c5f7fcef0 RCX: 00007f0c5e97f79a
RDX: 00000000200058c0 RSI: 0000000020005900 RDI: 00007f0c5f7fceb0
RBP: 00000000200058c0 R08: 00007f0c5f7fcef0 R09: 0000000000014001
R10: 0000000000014001 R11: 0000000000000246 R12: 0000000020005900
R13: 00007f0c5f7fceb0 R14: 0000000000005954 R15: 0000000020000040
 </TASK>
================================================================================