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Ensure that the inode check-hash is not left zeroed out in the case where

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the check-hash fails. Prior to the fix in -r342133 the inode with the
zeroed out check-hash was written back to disk causing further confusion.

Reported by:  Gary Jennejohn (gj)
Sponsored by: Netflix
This commit is contained in:
Kirk McKusick 2018-12-15 18:49:30 +00:00
parent 72d28f97be
commit c8f55fc4b4
1 changed files with 5 additions and 4 deletions
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9
sys/ufs/ffs/ffs_subr.c
View file

@ -161,7 +161,7 @@ ffs_load_inode(struct buf *bp, struct inode *ip, struct fs *fs, ino_t ino)
int
ffs_verify_dinode_ckhash(struct fs *fs, struct ufs2_dinode *dip)
{
uint32_t save_ckhash;
uint32_t ckhash, save_ckhash;
/*
* Return success if unallocated or we are not doing inode check-hash.
@ -174,10 +174,11 @@ ffs_verify_dinode_ckhash(struct fs *fs, struct ufs2_dinode *dip)
*/
save_ckhash = dip->di_ckhash;
dip->di_ckhash = 0;
if (save_ckhash != calculate_crc32c(~0L, (void *)dip, sizeof(*dip)))
return (EINVAL);
ckhash = calculate_crc32c(~0L, (void *)dip, sizeof(*dip));
dip->di_ckhash = save_ckhash;
return (0);
if (save_ckhash == ckhash)
return (0);
return (EINVAL);
}
/*