ksmbd: check outstanding simultaneous SMB operations

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If Client send simultaneous SMB operations to ksmbd, It exhausts too much
memory through the "ksmbd_work_cache”. It will cause OOM issue.
ksmbd has a credit mechanism but it can't handle this problem. This patch
add the check if it exceeds max credits to prevent this problem by assuming
that one smb request consumes at least one credit.

Cc: stable@vger.kernel.org # v5.15+
Reported-by: Norbert Szetei <norbert@doyensec.com>
Tested-by: Norbert Szetei <norbert@doyensec.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

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This commit is contained in:

Namjae Jeon 2024-11-04 13:43:06 +09:00

parent b8fc56fbca

commit 0a77d947f5

5 changed files with 20 additions and 10 deletions

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1

fs/smb/server/connection.c

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1

fs/smb/server/connection.h

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16

fs/smb/server/server.c

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10

fs/smb/server/smb_common.c

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2

fs/smb/server/smb_common.h

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