Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'for-7.1/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fix from Mikulas Patocka:
- fix metadata corruption in dm-thin
* tag 'for-7.1/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm-thin: fix metadata refcount underflow
+8
+8
drivers/md/persistent-data/dm-btree-remove.c
+8
drivers/md/persistent-data/dm-btree-remove.c
···
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if (le32_to_cpu(n->header.nr_entries) == 1) {
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struct dm_block *child;
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+
int is_shared;
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dm_block_t b = value64(n, 0);
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+
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+
r = dm_tm_block_is_shared(info->tm, b, &is_shared);
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+
if (r)
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+
return r;
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r = dm_tm_read_lock(info->tm, b, &btree_node_validator, &child);
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if (r)
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return r;
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+
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+
if (is_shared)
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+
inc_children(info->tm, dm_block_data(child), vt);
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memcpy(n, dm_block_data(child),
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dm_bm_block_size(dm_tm_get_bm(info->tm)));