loop4: detected capacity change from 0 to 40427
F2FS-fs (loop4): Invalid log sectors per block(0) log sectorsize(9)
F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock
================================================================================
UBSAN: shift-out-of-bounds in fs/f2fs/super.c:919:5
shift exponent 70 is too large for 64-bit type 'unsigned long'
CPU: 1 PID: 5022 Comm: syz.4.144 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
 ubsan_epilogue+0xa/0x30 lib/ubsan.c:151
 __ubsan_handle_shift_out_of_bounds+0x37c/0x400 lib/ubsan.c:321
 parse_options+0x4699/0x46a0 fs/f2fs/super.c:919
 f2fs_fill_super+0x21de/0x6b20 fs/f2fs/super.c:4228
 mount_bdev+0x287/0x3c0 fs/super.c:1443
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:632
 vfs_get_tree+0x88/0x270 fs/super.c:1573
 do_new_mount+0x24a/0xa40 fs/namespace.c:3069
 do_mount fs/namespace.c:3412 [inline]
 __do_sys_mount fs/namespace.c:3620 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3597
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f57cc19038a
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:00007f57ca3b3e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f57ca3b3ef0 RCX: 00007f57cc19038a
RDX: 0000200000000140 RSI: 00002000000000c0 RDI: 00007f57ca3b3eb0
RBP: 0000200000000140 R08: 00007f57ca3b3ef0 R09: 0000000001800004
R10: 0000000001800004 R11: 0000000000000246 R12: 00002000000000c0
R13: 00007f57ca3b3eb0 R14: 0000000000005523 R15: 0000200000000540
 </TASK>
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