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[PATCH] Fix for minix crash

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Mounting a (corrupt) minix filesystem with zero s_zmap_blocks
gives a spectacular crash on my 2.6.17.8 system, no doubt
because minix/inode.c does an unconditional
	minix_set_bit(0,sbi->s_zmap[0]->b_data);

[akpm@osdl.org: make labels conistent while we're there]

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andries Brouwer 2006-08-27 01:23:42 -07:00 committed by Linus Torvalds
parent fb8d81e477
commit f5fb09fa33
1 changed files with 10 additions and 3 deletions
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7
fs/minix/inode.c
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@ -204,6 +204,8 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
/*
* Allocate the buffer map to keep the superblock small.
*/
if (sbi->s_imap_blocks == 0 || sbi->s_zmap_blocks == 0)
goto out_illegal_sb;
i = (sbi->s_imap_blocks + sbi->s_zmap_blocks) * sizeof(bh);
map = kmalloc(i, GFP_KERNEL);
if (!map)
@ -276,6 +278,11 @@ out_no_map:
printk("MINIX-fs: can't allocate map\n");
goto out_release;
out_illegal_sb:
if (!silent)
printk("MINIX-fs: bad superblock\n");
goto out_release;
out_no_fs:
if (!silent)
printk("VFS: Can't find a Minix or Minix V2 filesystem "