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| author |   Christian Göttsche <cgzones@googlemail.com> | 2022-03-08 18:09:26 +0100 |
|---|---|---|
| committer |   Paul Moore <paul@paul-moore.com> | 2022-05-03 16:09:03 -0400 |
| commit | c29722fad4aabbf6bb841b8f058f858ec911df56 (patch) | |
| tree | 35e4e508fbec1d159d5c299650fe47a31d310a74 | |
| parent | selinux: declare data arrays const (diff) | |
| download | wireguard-linux-c29722fad4aabbf6bb841b8f058f858ec911df56.tar.xz wireguard-linux-c29722fad4aabbf6bb841b8f058f858ec911df56.zip | |
selinux: log anon inode class name
Log the anonymous inode class name in the security hook
inode_init_security_anon. This name is the key for name based type
transitions on the anon_inode security class on creation. Example:
type=AVC msg=audit(02/16/22 22:02:50.585:216) : avc: granted \
{ create } for pid=2136 comm=mariadbd anonclass=[io_uring] \
scontext=system_u:system_r:mysqld_t:s0 \
tcontext=system_u:system_r:mysqld_iouring_t:s0 tclass=anon_inode
Add a new LSM audit data type holding the inode and the class name.
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
[PM: adjusted 'anonclass' to be a trusted string, cgzones approved]
Signed-off-by: Paul Moore <paul@paul-moore.com>
| -rw-r--r-- | include/linux/lsm_audit.h | 2 | ||||
| -rw-r--r-- | security/lsm_audit.c | 3 | ||||
| -rw-r--r-- | security/selinux/hooks.c | 4 |
3 files changed, 7 insertions, 2 deletions
diff --git a/include/linux/lsm_audit.h b/include/linux/lsm_audit.h index 17d02eda9538..97a8b21eb033 100644 --- a/include/linux/lsm_audit.h +++ b/include/linux/lsm_audit.h @@ -76,6 +76,7 @@ struct common_audit_data { #define LSM_AUDIT_DATA_IBENDPORT 14 #define LSM_AUDIT_DATA_LOCKDOWN 15 #define LSM_AUDIT_DATA_NOTIFICATION 16 +#define LSM_AUDIT_DATA_ANONINODE 17 union { struct path path; struct dentry *dentry; @@ -96,6 +97,7 @@ struct common_audit_data { struct lsm_ibpkey_audit *ibpkey; struct lsm_ibendport_audit *ibendport; int reason; + const char *anonclass; } u; /* this union contains LSM specific data */ union { diff --git a/security/lsm_audit.c b/security/lsm_audit.c index 1897cbf6fc69..78a278f28e49 100644 --- a/security/lsm_audit.c +++ b/security/lsm_audit.c @@ -433,6 +433,9 @@ static void dump_common_audit_data(struct audit_buffer *ab, audit_log_format(ab, " lockdown_reason=\"%s\"", lockdown_reasons[a->u.reason]); break; + case LSM_AUDIT_DATA_ANONINODE: + audit_log_format(ab, " anonclass=%s", a->u.anonclass); + break; } /* switch (a->type) */ } diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index f1ee1bfc11de..beceb89f68d9 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -2964,8 +2964,8 @@ static int selinux_inode_init_security_anon(struct inode *inode, * allowed to actually create this type of anonymous inode. */ - ad.type = LSM_AUDIT_DATA_INODE; - ad.u.inode = inode; + ad.type = LSM_AUDIT_DATA_ANONINODE; + ad.u.anonclass = name ? (const char *)name->name : "?"; return avc_has_perm(&selinux_state, tsec->sid, |