cifs: Allocate memory for all iovs in smb2_ioctl

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An IOCTL uses up to 2 iovs. The 1st iov is the command itself, the 2nd iov is
optional data for that command. The 1st iov is always allocated on the heap
but the 2nd iov may point to a variable on the stack. This will trigger an
error when passing the 2nd iov for RDMA I/O.

Fix this by allocating a buffer for the 2nd iov.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Ronnie sahlberg <lsahlber@redhat.com>

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Long Li 2019-05-15 14:09:05 -07:00 • committed by Steve French

parent 3b24911571

commit 2c87d6a94d

1 changed files with 19 additions and 2 deletions

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fs/cifs/smb2pdu.c

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