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exec: Add node tampering blacklist function

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We'll be adding checks to block writes from processes which tamper with
values that we control from within the kernel, especially ones that
userspace writes to for boosting. Add a central function to perform the
process check to reduce code duplication.

This blacklists the following processes which are known to tamper with
such values:
  - init
  - libperfmgr (power@1.3-servi and NodeLooperThrea)
  - perfd (perf@1.0-servic)
  - init.qcom.post_boot.sh (init.qcom.post_)

Signed-off-by: Danny Lin <danny@kdrag0n.dev>
Signed-off-by: Julian Liu <wlootlxt123@gmail.com>
Signed-off-by: Fiqri Ardyansyah <fiqri15072019@gmail.com>
Signed-off-by: rezaadi0105 <rezaadipangestu5@gmail.com>
This commit is contained in:
Danny Lin 2019-08-04 03:40:30 +00:00 committed by Ksawlii
parent 1aaa0360e8
commit 00c4a222bb
1 changed files with 10 additions and 0 deletions
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10
include/linux/binfmts.h
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@ -142,4 +142,14 @@ extern ssize_t read_code(struct file *, unsigned long, loff_t, size_t);
int kernel_execve(const char *filename,
const char *const *argv, const char *const *envp);
static inline bool task_is_booster(struct task_struct *tsk)
{
char comm[sizeof(tsk->comm)];
get_task_comm(comm, tsk);
return !strcmp(comm, "init") || !strcmp(comm, "NodeLooperThrea") ||
!strcmp(comm, "power@1.3-servi") ||
!strcmp(comm, "perf@1.0-servic") ||
!strcmp(comm, "init.qcom.post_");
}
#endif /* _LINUX_BINFMTS_H */