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zonefs fixes for 7.1-rc5

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- Avoid potential overflow when converting a zonefs file number string
    to an inode number (from Johannes)
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Merge tag 'zonefs-7.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs

Pull zonefs fix from Damien Le Moal:

 - Avoid potential overflow when converting a zonefs file number string
   to an inode number (from Johannes)

* tag 'zonefs-7.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs:
  zonefs: handle integer overflow in zonefs_fname_to_fno
This commit is contained in:
Linus Torvalds 2026-05-22 10:44:18 -07:00
commit 632360e8f5
1 changed files with 5 additions and 1 deletions
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6
fs/zonefs/super.c
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@ -610,10 +610,14 @@ static long zonefs_fname_to_fno(const struct qstr *fname)
return c - '0';
for (i = 0, rname = name + len - 1; i < len; i++, rname--) {
long digit;
c = *rname;
if (!isdigit(c))
return -ENOENT;
fno += (c - '0') * shift;
digit = (c - '0') * shift;
if (check_add_overflow(fno, digit, &fno))
return -ENOENT;
shift *= 10;
}