smb: client: fix missed ses refcounting

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[ Upstream commit bf99f6be2d ]

Use new cifs_smb_ses_inc_refcount() helper to get an active reference
of @ses and @ses->dfs_root_ses (if set).  This will prevent
@ses->dfs_root_ses of being put in the next call to cifs_put_smb_ses()
and thus potentially causing an use-after-free bug.

Fixes: 8e3554150d ("cifs: fix sharing of DFS connections")
Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Paulo Alcantara 2023-07-11 14:15:10 -03:00 • committed by Greg Kroah-Hartman

parent 224ff8d6ca

commit eb382196e6

2 changed files with 11 additions and 17 deletions

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26

fs/smb/client/dfs.c

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2

fs/smb/client/smb2transport.c

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