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5a7ee91d11
fp can used in each command. If smb2_close command is coming at the
same time, UAF issue can happen by race condition.
Time
+
Thread A | Thread B1 B2 .... B5
smb2_open | smb2_close
|
__open_id |
insert fp to file_table |
|
| atomic_dec_and_test(&fp->refcount)
| if fp->refcount == 0, free fp by kfree.
// UAF! |
use fp |
+
This patch add f_state not to use freed fp is used and not to free fp in
use.
Reported-by: luosili <rootlab@huawei.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
||
|---|---|---|
| .. | ||
| mgmt | ||
| asn1.c | ||
| asn1.h | ||
| auth.c | ||
| auth.h | ||
| connection.c | ||
| connection.h | ||
| crypto_ctx.c | ||
| crypto_ctx.h | ||
| glob.h | ||
| Kconfig | ||
| ksmbd_netlink.h | ||
| ksmbd_spnego_negtokeninit.asn1 | ||
| ksmbd_spnego_negtokentarg.asn1 | ||
| ksmbd_work.c | ||
| ksmbd_work.h | ||
| Makefile | ||
| misc.c | ||
| misc.h | ||
| ndr.c | ||
| ndr.h | ||
| nterr.h | ||
| ntlmssp.h | ||
| oplock.c | ||
| oplock.h | ||
| server.c | ||
| server.h | ||
| smb2misc.c | ||
| smb2ops.c | ||
| smb2pdu.c | ||
| smb2pdu.h | ||
| smb_common.c | ||
| smb_common.h | ||
| smbacl.c | ||
| smbacl.h | ||
| smbfsctl.h | ||
| smbstatus.h | ||
| transport_ipc.c | ||
| transport_ipc.h | ||
| transport_rdma.c | ||
| transport_rdma.h | ||
| transport_tcp.c | ||
| transport_tcp.h | ||
| unicode.c | ||
| unicode.h | ||
| vfs_cache.c | ||
| vfs_cache.h | ||
| vfs.c | ||
| vfs.h | ||
| xattr.h | ||