kernel_samsung_a53x/fs/lockd
NeilBrown f99888960d lockd: drop inappropriate svc_get() from locked_get()
[ Upstream commit 665e89ab7c5af1f2d260834c861a74b01a30f95f ]

The below-mentioned patch was intended to simplify refcounting on the
svc_serv used by locked.  The goal was to only ever have a single
reference from the single thread.  To that end we dropped a call to
lockd_start_svc() (except when creating thread) which would take a
reference, and dropped the svc_put(serv) that would drop that reference.

Unfortunately we didn't also remove the svc_get() from
lockd_create_svc() in the case where the svc_serv already existed.
So after the patch:
 - on the first call the svc_serv was allocated and the one reference
   was given to the thread, so there are no extra references
 - on subsequent calls svc_get() was called so there is now an extra
   reference.
This is clearly not consistent.

The inconsistency is also clear in the current code in lockd_get()
takes *two* references, one on nlmsvc_serv and one by incrementing
nlmsvc_users.   This clearly does not match lockd_put().

So: drop that svc_get() from lockd_get() (which used to be in
lockd_create_svc().

Reported-by: Ido Schimmel <idosch@idosch.org>
Closes: https://lore.kernel.org/linux-nfs/ZHsI%2FH16VX9kJQX1@shredder/T/#u
Fixes: b73a2972041b ("lockd: move lockd_start_svc() call into lockd_create_svc()")
Signed-off-by: NeilBrown <neilb@suse.de>
Tested-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-11-19 12:28:32 +01:00
..
clnt4xdr.c lockd: set file_lock start and end when decoding nlm4 testargs 2024-11-19 12:28:31 +01:00
clntlock.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
clntproc.c SUNRPC: Trace calls to .rpc_call_done 2024-11-19 12:27:47 +01:00
clntxdr.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
host.c lockd: move from strlcpy with unused retval to strscpy 2024-11-19 12:28:21 +01:00
Makefile Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mon.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
netns.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
procfs.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
procfs.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
svc.c lockd: drop inappropriate svc_get() from locked_get() 2024-11-19 12:28:32 +01:00
svc4proc.c lockd: set missing fl_flags field when retrieving args 2024-11-19 12:28:28 +01:00
svclock.c lockd: fix file selection in nlmsvc_cancel_blocked 2024-11-19 12:28:28 +01:00
svcproc.c lockd: set missing fl_flags field when retrieving args 2024-11-19 12:28:28 +01:00
svcshare.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
svcsubs.c lockd: set other missing fields when unlocking files 2024-11-19 12:28:28 +01:00
svcxdr.h NLM: Fix svcxdr_encode_owner() 2024-11-19 12:27:45 +01:00
xdr.c SUNRPC: Change return value type of .pc_encode 2024-11-19 12:27:48 +01:00
xdr4.c lockd: set file_lock start and end when decoding nlm4 testargs 2024-11-19 12:28:31 +01:00