PWN-Hunter/android_kernel_xiaomi_sdm845
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[PATCH] uml: clear SKAS0/3 flags when running in TT mode

Browse Source 
SEGV_MAYBE_FIXABLE tests ptrace_faultinfo, and depends on it being 1 only in
SKAS3 mode, while currently when running with mode=tt it will be 1 anyway.
Fix this, and do the same for proc_mm.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paolo 'Blaisorblade' Giarrusso 2005-09-30 11:59:00 -07:00 committed by Linus Torvalds
parent be662a18b7
commit 8923648c12
2 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/um/include/os.h
View File

@ -157,6 +157,10 @@ extern int os_lock_file(int fd, int excl);
extern void os_early_checks(void);
extern int can_do_skas(void);
/* Make sure they are clear when running in TT mode. Required by
* SEGV_MAYBE_FIXABLE */
#define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0)
/* mem.c */
extern int create_mem_file(unsigned long len);

2
arch/um/kernel/um_arch.c
View File

@ -334,6 +334,8 @@ int linux_main(int argc, char **argv)
add_arg(DEFAULT_COMMAND_LINE);
os_early_checks();
if (force_tt)
clear_can_do_skas();
mode_tt = force_tt ? 1 : !can_do_skas();
#ifndef CONFIG_MODE_TT
if (mode_tt) {