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ksmbd: rate limit unmapped SID errors

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A client can include many structurally valid but unmapped SIDs in a DACL.
Logging every mapping failure lets one request generate hundreds of kernel
error messages.

Rate limit the message to prevent an authenticated client from flooding
the kernel log.

Fixes: e2f34481b2 ("cifsd: add server-side procedures for SMB3")
Reported-by: Cheryl Babcock <cheryl@renat.io>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
This commit is contained in:
Namjae Jeon 2026-08-25 09:32:23 +09:00
parent c61dc7b1b4
commit feca5e70fc
1 changed files with 2 additions and 2 deletions
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4
fs/smb/server/smbacl.c
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@ -528,8 +528,8 @@ static int parse_dacl(struct mnt_idmap *idmap,
temp_fattr.cf_uid = INVALID_UID;
ret = sid_to_id(idmap, &ppace[i]->sid, SIDOWNER, &temp_fattr);
if (ret || uid_eq(temp_fattr.cf_uid, INVALID_UID)) {
pr_err("%s: Error %d mapping Owner SID to uid\n",
__func__, ret);
pr_err_ratelimited("%s: Error %d mapping Owner SID to uid\n",
__func__, ret);
continue;
}