ubi: Fix an error pointer dereference in error handling code

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commit 5d3805af27 upstream.

If "seen_pebs = init_seen(ubi);" fails then "seen_pebs" is an error pointer
and we try to kfree() it which results in an Oops.

This patch re-arranges the error handling so now it only frees things
which have been allocated successfully.

Fixes: daef3dd1f0 ("UBI: Fastmap: Add self check to detect absent PEBs")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Dan Carpenter 2020-01-13 16:23:46 +03:00 • committed by Greg Kroah-Hartman

parent dcc298a975

commit 7ee13256e4

1 changed files with 12 additions and 9 deletions

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21

drivers/mtd/ubi/fastmap.c

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