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Xin Xiong c0434f0e05 net/sunrpc: fix potential memory leaks in rpc_sysfs_xprt_state_change() 
commit bfc48f1b0505ffcb03a6d749139b7577d6b81ae0 upstream.

The issue happens on some error handling paths. When the function
fails to grab the object `xprt`, it simply returns 0, forgetting to
decrease the reference count of another object `xps`, which is
increased by rpc_sysfs_xprt_kobj_get_xprt_switch(), causing refcount
leaks. Also, the function forgets to check whether `xps` is valid
before using it, which may result in NULL-dereferencing issues.

Fix it by adding proper error handling code when either `xprt` or
`xps` is NULL.

Fixes: 5b7eb78486cd ("SUNRPC: take a xprt offline using sysfs")
Signed-off-by: Xin Xiong <xiongx18@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-08-25 11:40:23 +02:00
..
auth_gss
SUNRPC: Ensure that the gssproxy client can start in a connected state
2022-05-18 10:26:56 +02:00
xprtrdma
SUNRPC: Trap RDMA segment overflows
2022-06-14 18:36:16 +02:00
addr.c
nfsd: don't alloc under spinlock in rpc_parse_scope_id
2021-11-18 19:16:58 +01:00
auth_null.c
…
auth_unix.c
…
auth.c
sunrpc: fix expiry of auth creds
2022-08-25 11:40:05 +02:00
backchannel_rqst.c
SUNRPC: Reinitialise the backchannel request buffers before reuse
2022-08-25 11:40:05 +02:00
cache.c
SUNRPC: improve error response to over-size gss credential
2021-09-03 13:38:11 -04:00
clnt.c
sunrpc: set cl_max_connect when cloning an rpc_clnt
2022-06-22 14:21:59 +02:00
debugfs.c
NFS Client Updates for Linux 5.15
2021-09-04 10:25:26 -07:00
fail.h
SUNRPC: Server-side disconnect injection
2021-08-20 13:50:33 -04:00
Kconfig
SUNRPC: remove RC4-HMAC-MD5 support from KerberosV
2020-09-11 14:39:15 +10:00
Makefile
sunrpc: Create a sunrpc directory under /sys/kernel/
2021-07-08 14:03:23 -04:00
netns.h
…
rpc_pipe.c
fsnotify: fix fsnotify hooks in pseudo filesystems
2022-02-01 17:27:01 +01:00
rpcb_clnt.c
sunrpc: honor rpc_task's timeout value in rpcb_create()
2021-04-05 09:04:21 -04:00
sched.c
SUNRPC: remove scheduling boost for "SWAPPER" tasks.
2022-04-13 20:59:12 +02:00
socklib.c
skb_copy_and_csum_bits(): don't bother with the last argument
2020-08-20 15:45:13 -04:00
socklib.h
SUNRPC: Refactor xs_sendpages()
2020-03-16 12:04:33 -04:00
stats.c
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
sunrpc_syms.c
sunrpc: add IDs to multipath
2021-07-08 14:03:23 -04:00
sunrpc.h
Replace HTTP links with HTTPS ones: NFS, SUNRPC, and LOCKD clients
2020-09-21 10:21:10 -04:00
svc_xprt.c
SUNRPC: Fix NFSD's request deferral on RDMA transports
2022-04-20 09:34:18 +02:00
svc.c
NFSD: Have legacy NFSD WRITE decoders use xdr_stream_subsegment()
2022-03-08 19:12:33 +01:00
svcauth_unix.c
SUNRPC: Set rq_auth_stat in the pg_authenticate() callout
2021-08-10 14:18:35 -04:00
svcauth.c
SUNRPC: Add svc_rqst::rq_auth_stat
2021-08-10 14:18:35 -04:00
svcsock.c
SUNRPC: svc_tcp_sendmsg() should handle errors from xdr_alloc_bvec()
2022-04-13 20:59:20 +02:00
sysctl.c
net/sunrpc: fix useless comparison in proc_do_xprt()
2020-11-08 16:28:25 -05:00
sysfs.c
net/sunrpc: fix potential memory leaks in rpc_sysfs_xprt_state_change()
2022-08-25 11:40:23 +02:00
sysfs.h
SUNRPC: take a xprt offline using sysfs
2021-07-08 14:03:24 -04:00
timer.c
…
xdr.c
SUNRPC: Fix READ_PLUS crasher
2022-07-07 17:53:25 +02:00
xprt.c
SUNRPC: Ensure we flush any closed sockets before xs_xprt_free()
2022-05-18 10:26:57 +02:00
xprtmultipath.c
SUNRPC keep track of number of transports to unique addresses
2021-08-27 16:36:53 -04:00
xprtsock.c
SUNRPC: Ensure we flush any closed sockets before xs_xprt_free()
2022-05-18 10:26:57 +02:00