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ufs_free_fragments(): fix the braino in sanity check

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The function expects that all fragments it's been asked to free will
be within the same block.  And it even has a sanity check verifying
that - it takes the fragment number modulo the number of fragments
per block, adds the count and checks if that's too high.

Unfortunately, it misspells the upper limit - instead of ->s_fpb
(fragments per block) it says ->s_fpg (fragments per cylinder group).
So "too high" ends up being insanely lenient.

Had been that way since 2.1.112, when UFS write support had been
added.  27 years to spot a typo...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2024-10-18 03:25:29 -04:00
parent c5df105f7d
commit 426f07ad3e
1 changed files with 1 additions and 1 deletions
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2
fs/ufs/balloc.c
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@ -50,7 +50,7 @@ void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count)
UFSD("ENTER, fragment %llu, count %u\n",
(unsigned long long)fragment, count);
if (ufs_fragnum(fragment) + count > uspi->s_fpg)
if (ufs_fragnum(fragment) + count > uspi->s_fpb)
ufs_error (sb, "ufs_free_fragments", "internal error");
mutex_lock(&UFS_SB(sb)->s_lock);