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kernel: backport to 4.4 (#166)

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These changes make KernelSU work on kernel4.4
[link](https://github.com/F-19-F/android_kernel_oneplus_msm8998).
LINUX_VERSION_CODE macro changes have been vertied on 4.4 4.9 4.14.
For kernel 4.4,just pick two commits
* [introduce
KernelSU](2993524f2f)
* [allow init exec ksud under
nosuid](3df9df42a6)
This commit is contained in:
f19
2023-02-01 19:48:36 +08:00
committed by GitHub
parent 417ff8a6c5
commit 4f2b8b7077
10 changed files with 104 additions and 32 deletions
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16
kernel/sucompat.c
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@@ -134,9 +134,16 @@ static int faccessat_handler_pre(struct kprobe *p, struct pt_regs *regs)
static int newfstatat_handler_pre(struct kprobe *p, struct pt_regs *regs)
{
int *dfd = (int *)PT_REGS_PARM1(regs);
// static int vfs_statx(int dfd, const char __user *filename, int flags,struct kstat *stat, u32 request_mask)
int *dfd = (int *)&PT_REGS_PARM1(regs);
const char __user **filename_user = (const char **)&PT_REGS_PARM2(regs);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
int *flags = (int *)&PT_REGS_PARM3(regs);
#else
// int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat,int flag)
int *flags = (int *)&PT_REGS_PARM4(regs);
#endif
return ksu_handle_stat(dfd, filename_user, flags);
}
@@ -165,7 +172,11 @@ static struct kprobe faccessat_kp = {
};
static struct kprobe newfstatat_kp = {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
.symbol_name = "vfs_statx",
#else
.symbol_name = "vfs_fstatat",
#endif
.pre_handler = newfstatat_handler_pre,
};
@@ -178,6 +189,9 @@ static struct kprobe execve_kp = {
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) && \
LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0)
.symbol_name = "do_execveat_common",
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0) && \
LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 0)
.symbol_name = "do_execveat_common",
#endif
.pre_handler = execve_handler_pre,
};