xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ANDROID: syscall_check: add vendor hook for open syscall

Browse Source 
Through this vendor hook, we can get the timing to check
current running task for the validation of its credential
and open operation.

Bug: 191291287

Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Change-Id: Ia644ceb02dbc230ee1d25cad3630c2c3f908e41a
This commit is contained in:
Kuan-Ying Lee
2021-06-18 13:28:11 +08:00
committed by Todd Kjos
parent a5543c9cd7
commit a7a3b31d58
3 changed files with 7 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/android/vendor_hooks.c
View File

@@ -348,3 +348,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rproc_recovery);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ptype_head); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ptype_head);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_kfree_skb); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_kfree_skb);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_check_mmap_file); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_check_mmap_file);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_check_file_open);

2
fs/open.c
View File

@@ -34,6 +34,7 @@
#include <linux/compat.h> #include <linux/compat.h>
#include "internal.h" #include "internal.h"
#include <trace/hooks/syscall_check.h>
int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs, int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
struct file *filp) struct file *filp)
@@ -800,6 +801,7 @@ static int do_dentry_open(struct file *f,
error = -ENODEV; error = -ENODEV;
goto cleanup_all; goto cleanup_all;
} }
trace_android_vh_check_file_open(f);
error = security_file_open(f); error = security_file_open(f);
if (error) if (error)

4
include/trace/hooks/syscall_check.h
View File

@@ -17,6 +17,10 @@ DECLARE_HOOK(android_vh_check_mmap_file,
unsigned long flag, unsigned long ret), unsigned long flag, unsigned long ret),
TP_ARGS(file, prot, flag, ret)); TP_ARGS(file, prot, flag, ret));
DECLARE_HOOK(android_vh_check_file_open,
TP_PROTO(const struct file *file),
TP_ARGS(file));
#endif /* _TRACE_HOOK_SYSCALL_CHECK_H */ #endif /* _TRACE_HOOK_SYSCALL_CHECK_H */
/* This part must be outside protection */ /* This part must be outside protection */
#include <trace/define_trace.h> #include <trace/define_trace.h>