Re: vfat: attempt to access beyond end of device

[OGAWA Hirofumi]

Hi,

Alexander Griesser <[e-mail]> writes:

> When I try to write new files on it, I get:
> kernel: attempt to access beyond end of device
> kernel: 16:01: rw=0, want=2081231810, limit=80035798
> 
> According to his Problewm:
> Shouldn't an "int" be enough?
> 
> 2^31 = 2147483648
> And he "wants": 2081231810
> 
> Should do, or did I miss something?

kernel: attempt to access beyond end of device
kernel: 16:01: rw=0, want=2081231810, limit=80035798
kernel: dev = 16:01, ino = -2120058812
                           ^^^^^^^^^^^^
kernel: Filesystem panic (dev 16:01).

i_pos is -2120058812.

    fat_write_inode()
        i_pos = -2120058812;                      /* -2120058812 */
        fat_bread(sb, i_pos >> 4);                /* -132503676 */
    ...
    getblk()
        blocknr = block;                          /* 4162463620 */
    ...
    submit_bh()
        bh->b_rsector = bh->b_blocknr * count;
    generic_make_request()
        unsigned long sector = bh->b_rsector;

        printk(KERN_INFO "%s: rw=%d, want=%ld, limit=%d\n",
               kdevname(bh->b_rdev), rw,
               (sector + count)>>1, minorsize);   /* 2081231810 */

Thanks.
-- 
OGAWA Hirofumi <[e-mail]>