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SMB3: Kernel oops mounting a encryptData share with CONFIG_DEBUG_VIRTUAL

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[ Upstream commit ee9d661823 ]

Fix kernel oops when mounting a encryptData CIFS share with
CONFIG_DEBUG_VIRTUAL

Signed-off-by: Sebastien Tisserant <stisserant@wallix.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sebastien Tisserant
2019-08-01 12:06:08 -05:00
committed by Greg Kroah-Hartman
parent fab5a1fd17
commit 33bdea175d
1 changed files with 9 additions and 1 deletions
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10
fs/cifs/smb2ops.c
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@ -2545,7 +2545,15 @@ fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf, static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
unsigned int buflen) unsigned int buflen)
{ {
sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf)); void *addr;
/*
* VMAP_STACK (at least) puts stack into the vmalloc address space
*/
if (is_vmalloc_addr(buf))
addr = vmalloc_to_page(buf);
else
addr = virt_to_page(buf);
sg_set_page(sg, addr, buflen, offset_in_page(buf));
} }
/* Assumes the first rqst has a transform header as the first iov. /* Assumes the first rqst has a transform header as the first iov.