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[08/19] ipc: adjust proc_ipc_sem_dointvec definition to match prototype

Message ID 20200904233546._jA3OBwc_%akpm@linux-foundation.org
State New
Headers show
Series [01/19] memcg: fix use-after-free in uncharge_batch | expand

Commit Message

Andrew Morton Sept. 4, 2020, 11:35 p.m. UTC
From: Tobias Klauser <tklauser@distanz.ch>
Subject: ipc: adjust proc_ipc_sem_dointvec definition to match prototype

Commit 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
changed ctl_table.proc_handler to take a kernel pointer.  Adjust the
signature of proc_ipc_sem_dointvec to match ctl_table.proc_handler which
fixes the following sparse error/warning:

ipc/ipc_sysctl.c:94:47: warning: incorrect type in argument 3 (different address spaces)
ipc/ipc_sysctl.c:94:47:    expected void *buffer
ipc/ipc_sysctl.c:94:47:    got void [noderef] __user *buffer
ipc/ipc_sysctl.c:194:35: warning: incorrect type in initializer (incompatible argument 3 (different address spaces))
ipc/ipc_sysctl.c:194:35:    expected int ( [usertype] *proc_handler )( ... )
ipc/ipc_sysctl.c:194:35:    got int ( * )( ... )

Link: https://lkml.kernel.org/r/20200825105846.5193-1-tklauser@distanz.ch
Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 ipc/ipc_sysctl.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

--- a/ipc/ipc_sysctl.c~ipc-adjust-proc_ipc_sem_dointvec-definition-to-match-prototype
+++ a/ipc/ipc_sysctl.c
@@ -85,7 +85,7 @@  static int proc_ipc_auto_msgmni(struct c
 }
 
 static int proc_ipc_sem_dointvec(struct ctl_table *table, int write,
-	void __user *buffer, size_t *lenp, loff_t *ppos)
+	void *buffer, size_t *lenp, loff_t *ppos)
 {
 	int ret, semmni;
 	struct ipc_namespace *ns = current->nsproxy->ipc_ns;