cifs: parse_dfs_referrals: prevent oob on malformed input

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commit 6447b0e355 upstream.

Malicious SMB server can send invalid reply to FSCTL_DFS_GET_REFERRALS

- reply smaller than sizeof(struct get_dfs_referral_rsp)
- reply with number of referrals smaller than NumberOfReferrals in the
header

Processing of such replies will cause oob.

Return -EINVAL error on such replies to prevent oob-s.

Signed-off-by: Eugene Korenevsky <ekorenevsky@aliyun.com>
Cc: stable@vger.kernel.org
Suggested-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Eugene Korenevsky 2025-10-13 21:39:30 +03:00 • committed by Greg Kroah-Hartman

parent 06ee44bac4

commit bb0f2e66e1

1 changed files with 17 additions and 0 deletions

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fs/smb/client/misc.c

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