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genetlink: Fix a memory leak on error path

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In genl_register_family(), when idr_alloc() fails,
we forget to free the memory we possibly allocate for
family->attrbuf.

Reported-by: Hulk Robot <[email protected]>
Fixes: 2ae0f17df1 ("genetlink: use idr to track families")
Signed-off-by: YueHaibing <[email protected]>
Reviewed-by: Kirill Tkhai <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
YueHaibing 2019-03-21 15:02:50 +08:00 • committed by David S. Miller
commit ceabee6c59
1 changed files with 2 additions and 1 deletions
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3
net/netlink/genetlink.c
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@ -366,7 +366,7 @@ int genl_register_family(struct genl_family *family)
start, end + 1, GFP_KERNEL);
if (family->id < 0) {
err = family->id;
goto errout_locked;
goto errout_free;
}
err = genl_validate_assign_mc_groups(family);
@ -385,6 +385,7 @@ int genl_register_family(struct genl_family *family)
errout_remove:
idr_remove(&genl_fam_idr, family->id);
errout_free:
kfree(family->attrbuf);
errout_locked:
genl_unlock_all();