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https://github.com/torvalds/linux
05 April 2024, 19:05:47 UTC
Revision 265fd1991c1db85fbabaad4946ca0e63e2ae688d authored by Hyunchul Lee on 24 September 2021, 15:06:16 UTC, committed by Steve French on 25 September 2021, 02:25:23 UTC 
ksmbd: use LOOKUP_BENEATH to prevent the out of share access
 
instead of removing '..' in a given path, call
kern_path with LOOKUP_BENEATH flag to prevent
the out of share access.

ran various test on this:
smb2-cat-async smb://127.0.0.1/homes/../out_of_share
smb2-cat-async smb://127.0.0.1/homes/foo/../../out_of_share
smbclient //127.0.0.1/homes -c "mkdir ../foo2"
smbclient //127.0.0.1/homes -c "rename bar ../bar"

Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Cc: Ralph Boehme <slow@samba.org>
Tested-by: Steve French <smfrench@gmail.com>
Tested-by: Namjae Jeon <linkinjeon@kernel.org>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
1 parent 4ea4779
History
Tip revision: 265fd1991c1db85fbabaad4946ca0e63e2ae688d authored by Hyunchul Lee on 24 September 2021, 15:06:16 UTC
ksmbd: use LOOKUP_BENEATH to prevent the out of share access
Tip revision: 265fd19
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.clang-format -rw-r--r-- 16.6 KB
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.get_maintainer.ignore -rw-r--r-- 71 bytes
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