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| author | Ronnie Sahlberg | 2019-05-01 04:03:41 +0200 |
|---|---|---|
| committer | Steve French | 2019-05-08 06:24:55 +0200 |
| commit | d69cb728e70c40268762182a62f5d5d6fa51c5b2 (patch) | |
| tree | 875d356df74e9773969aa9dd03adbf78cf6511e3 /fs/cifs/cifsglob.h | |
| parent | smb3: Add protocol structs for change notify support (diff) | |
| download | kernel-qcow2-linux-d69cb728e70c40268762182a62f5d5d6fa51c5b2.tar.gz kernel-qcow2-linux-d69cb728e70c40268762182a62f5d5d6fa51c5b2.tar.xz kernel-qcow2-linux-d69cb728e70c40268762182a62f5d5d6fa51c5b2.zip | |
cifs: fix credits leak for SMB1 oplock breaks
For SMB1 oplock breaks we would grab one credit while sending the PDU
but we would never relese the credit back since we will never receive a
response to this from the server. Eventuallt this would lead to a hang
once all credits are leaked.
Fix this by defining a new flag CIFS_NO_SRV_RSP which indicates that there
is no server response to this command and thus we need to add any credits back
immediately after sending the PDU.
CC: Stable <stable@vger.kernel.org> #v5.0+
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/cifsglob.h')
| -rw-r--r-- | fs/cifs/cifsglob.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 5ffe0e538cec..65faad3aa69a 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -1703,6 +1703,7 @@ static inline bool is_retryable_error(int error) #define CIFS_HAS_CREDITS 0x0400 /* already has credits */ #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */ +#define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */ /* Security Flags: indicate type of session setup needed */ #define CIFSSEC_MAY_SIGN 0x00001 |