[PATCH] jffs2: fix memory leak if the sector was successfully erased
niam
niam.niam at gmail.com
Mon Feb 22 12:57:29 EST 2010
Yes, you are right.
Michael Trimarchi also responded that it's freed by the callback.
My concern now that it's not obvious to free erase instruction in
jffs2_erase_callback.
Why not to free it the same piece of code where it was allocated?
--Dima
On Mon, Feb 22, 2010 at 7:49 PM, Joakim Tjernlund
<joakim.tjernlund at transmode.se> wrote:
> niam <niam.niam at gmail.com> wrote on 2010/02/22 17:40:11:
>>
>> Resending patch to proper people/mailing list.
>>
>> Memory allocated for erase instruction is not freed if the sector was
>> successfully erased.
>
> NAK, jffs2_erase_callback() will free it so
> you have added a double free I think. Did you measure a memory leak?
>
>>
>> Signed-off-by: Dmytro Milinevskyy <niam.niam at gmail.com>
>> ---
>> fs/jffs2/erase.c | 4 +++-
>> 1 files changed, 3 insertions(+), 1 deletions(-)
>>
>> diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c
>> index b47679b..c0a5604 100644
>> --- a/fs/jffs2/erase.c
>> +++ b/fs/jffs2/erase.c
>> @@ -74,8 +74,10 @@ static void jffs2_erase_block(struct jffs2_sb_info *c,
>> ((struct erase_priv_struct *)instr->priv)->c = c;
>>
>> ret = c->mtd->erase(c->mtd, instr);
>> - if (!ret)
>> + if (!ret) {
>> + kfree(instr);
>> return;
>> + }
>>
>> bad_offset = instr->fail_addr;
>> kfree(instr);
>>
>
>
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