This patch passes the full value so that the audit function can use all of it. The audit function was updated to log the additional information in the AUDIT_FANOTIFY record. The following is an example of the new record format: type=FANOTIFY msg=audit(1600385147.372:590): resp=2 fan_type=1 fan_ctx=17 Suggested-by: Steve Grubb <sgrubb@xxxxxxxxxx> Link: https://lore.kernel.org/r/3075502.aeNJFYEL58@x2 Signed-off-by: Richard Guy Briggs <rgb@xxxxxxxxxx> Link: https://lore.kernel.org/r/23c7f206a465d88cc646a944515fcc6a365f5eb2.1651174324.git.rgb@xxxxxxxxxx --- fs/notify/fanotify/fanotify.c | 4 +++- include/linux/audit.h | 8 ++++---- kernel/auditsc.c | 18 +++++++++++++++--- 3 files changed, 22 insertions(+), 8 deletions(-) diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c index 00aff6e29bf8..bb16d9e0f31b 100644 --- a/fs/notify/fanotify/fanotify.c +++ b/fs/notify/fanotify/fanotify.c @@ -272,7 +272,9 @@ static int fanotify_get_response(struct fsnotify_group *group, /* Check if the response should be audited */ if (event->response & FAN_AUDIT) - audit_fanotify(event->response & ~FAN_AUDIT); + audit_fanotify(event->response & ~FAN_AUDIT, + event->extra_info_type, + (char *)&event->extra_info_buf); pr_debug("%s: group=%p event=%p about to return ret=%d\n", __func__, group, event, ret); diff --git a/include/linux/audit.h b/include/linux/audit.h index d06134ac6245..0897128ee43b 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -419,7 +419,7 @@ extern void __audit_log_capset(const struct cred *new, const struct cred *old); extern void __audit_mmap_fd(int fd, int flags); extern void __audit_openat2_how(struct open_how *how); extern void __audit_log_kern_module(char *name); -extern void __audit_fanotify(unsigned int response); +extern void __audit_fanotify(__u16 response, __u16 type, char *buf); extern void __audit_tk_injoffset(struct timespec64 offset); extern void __audit_ntp_log(const struct audit_ntp_data *ad); extern void __audit_log_nfcfg(const char *name, u8 af, unsigned int nentries, @@ -526,10 +526,10 @@ static inline void audit_log_kern_module(char *name) __audit_log_kern_module(name); } -static inline void audit_fanotify(unsigned int response) +static inline void audit_fanotify(__u16 response, __u16 type, char *buf) { if (!audit_dummy_context()) - __audit_fanotify(response); + __audit_fanotify(response, type, buf); } static inline void audit_tk_injoffset(struct timespec64 offset) @@ -686,7 +686,7 @@ static inline void audit_log_kern_module(char *name) { } -static inline void audit_fanotify(unsigned int response) +static inline void audit_fanotify(__u16 response, __u16 type, char *buf) { } static inline void audit_tk_injoffset(struct timespec64 offset) diff --git a/kernel/auditsc.c b/kernel/auditsc.c index ea2ee1181921..afdbc416069a 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -64,6 +64,7 @@ #include <uapi/linux/limits.h> #include <uapi/linux/netfilter/nf_tables.h> #include <uapi/linux/openat2.h> // struct open_how +#include <uapi/linux/fanotify.h> #include "audit.h" @@ -2893,10 +2894,21 @@ void __audit_log_kern_module(char *name) context->type = AUDIT_KERN_MODULE; } -void __audit_fanotify(unsigned int response) +void __audit_fanotify(__u16 response, __u16 type, char *buf) { - audit_log(audit_context(), GFP_KERNEL, - AUDIT_FANOTIFY, "resp=%u", response); + switch (type) { + case FAN_RESPONSE_INFO_AUDIT_RULE: + audit_log(audit_context(), GFP_KERNEL, AUDIT_FANOTIFY, + "resp=%u fan_type=%u fan_ctx=%u", + response, type, (__u32)*buf); + break; + case FAN_RESPONSE_INFO_AUDIT_NONE: + default: + audit_log(audit_context(), GFP_KERNEL, AUDIT_FANOTIFY, + "resp=%u fan_type=%u fan_ctx=?", + response, type); + break; + } } void __audit_tk_injoffset(struct timespec64 offset) -- 2.27.0
