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keys: sparse: Fix key_fs[ug]id_changed()

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Sparse warnings are incurred by key_fs[ug]id_changed() due to unprotected
accesses of tsk->cred, which is marked __rcu.

Fix this by passing the new cred struct to these functions from
commit_creds() rather than the task pointer.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: James Morris <jamorris@linux.microsoft.com>
This commit is contained in:
David Howells 2019-05-22 14:06:51 +01:00
parent a188339ca5
commit 2e21865faf
3 changed files with 16 additions and 18 deletions
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8
include/linux/key.h
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@ -402,8 +402,8 @@ extern struct ctl_table key_sysctls[];
* the userspace interface
*/
extern int install_thread_keyring_to_cred(struct cred *cred);
extern void key_fsuid_changed(struct task_struct *tsk);
extern void key_fsgid_changed(struct task_struct *tsk);
extern void key_fsuid_changed(struct cred *new_cred);
extern void key_fsgid_changed(struct cred *new_cred);
extern void key_init(void);
#else /* CONFIG_KEYS */
@ -418,8 +418,8 @@ extern void key_init(void);
#define make_key_ref(k, p) NULL
#define key_ref_to_ptr(k) NULL
#define is_key_possessed(k) 0
#define key_fsuid_changed(t) do { } while(0)
#define key_fsgid_changed(t) do { } while(0)
#define key_fsuid_changed(c) do { } while(0)
#define key_fsgid_changed(c) do { } while(0)
#define key_init() do { } while(0)
#endif /* CONFIG_KEYS */