[PATCH 1/1] Fix memory leak in kernfs_security_xattr_set and kernfs_security_xattr_set

CHANDAN VN chandan.vn at samsung.com
Fri Jun 1 16:29:13 UTC 2018


>> I agree that the fix can be done simply by using "false" for 
>> smack_inode_getsecurity(), but what happens with kernfs_node_setsecdata()
>> and smack_inode_notifysecctx(). kernfs_node_setsecdata() is probably ignorable
>> but smack_inode_notifysecctx() is sending the "ctx" to smack_inode_setsecurity()
>> and since "ctx" would be NULL because we used "false", smack_inode_setsecurity()
>> becomes dummy.
 
>Thank you for pointing this out. You're right, there's more
>at issue here than changing the alloc flag will fix. I think
>that calling smack_inode_getsecurity() from smack_inode_getsecctx()
>is making the code more complicated than it needs to be. I will
>have a patch shortly.

If you think the patch would take time or is complicated, I suggest that the kfree() fix should go
to fix the leaks for now. 
 
 
 
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