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Avoid lost buffers in fsck_ffs.

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Sponsored by: Netflix

(cherry picked from commit 4313e2ae44)
This commit is contained in:
Kirk McKusick 2021-10-07 15:51:56 -07:00
parent b6aec78847
commit 010e3bc772
1 changed files with 11 additions and 7 deletions
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18
sbin/fsck_ffs/inode.c
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@ -264,6 +264,8 @@ ino_blkatoff(union dinode *dp, ino_t ino, ufs_lbn_t lbn, int *frags,
int i;
*frags = 0;
if (bpp != NULL)
*bpp = NULL;
/*
* Handle extattr blocks first.
*/
@ -300,6 +302,8 @@ ino_blkatoff(union dinode *dp, ino_t ino, ufs_lbn_t lbn, int *frags,
continue;
if (lbn > 0 && lbn >= next)
continue;
if (DIP(dp, di_ib[i]) == 0)
return (0);
return (indir_blkatoff(DIP(dp, di_ib[i]), ino, -cur - i, lbn,
bpp));
}
@ -321,8 +325,6 @@ indir_blkatoff(ufs2_daddr_t blk, ino_t ino, ufs_lbn_t cur, ufs_lbn_t lbn,
ufs_lbn_t base;
int i, level;
if (blk == 0)
return (0);
level = lbn_level(cur);
if (level == -1)
pfatal("Invalid indir lbn %jd in ino %ju\n",
@ -352,12 +354,14 @@ indir_blkatoff(ufs2_daddr_t blk, ino_t ino, ufs_lbn_t cur, ufs_lbn_t lbn,
return (0);
blk = IBLK(bp, i);
bp->b_index = i;
if (bpp != NULL)
*bpp = bp;
else
brelse(bp);
if (cur == lbn)
if (cur == lbn || blk == 0) {
if (bpp != NULL)
*bpp = bp;
else
brelse(bp);
return (blk);
}
brelse(bp);
if (level == 0)
pfatal("Invalid lbn %jd at level 0 for ino %ju\n", lbn,
(uintmax_t)ino);