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nvmem: core: fix error path in nvmem_add_cells()

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The current code fails to nvmem_cell_drop(cells[0]) - even worse, if
the loop above fails already at i==0, we'll enter an essentially
infinite loop doing nvmem_cell_drop on cells[-1], cells[-2], ... which
is unlikely to end well.

Also, we're not freeing the temporary backing array cells on the error
path.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rasmus Villemoes 2016-02-08 22:04:29 +01:00 committed by Greg Kroah-Hartman
parent 990162f038
commit dfdf141429
1 changed files with 3 additions and 1 deletions
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4
drivers/nvmem/core.c
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@ -294,9 +294,11 @@ static int nvmem_add_cells(struct nvmem_device *nvmem,
return 0; return 0;
err: err:
while (--i) while (i--)
nvmem_cell_drop(cells[i]); nvmem_cell_drop(cells[i]);
kfree(cells);
return rval; return rval;
} }