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authorKees Cook <keescook@chromium.org>2018-01-02 23:15:53 +0300
committerKees Cook <keescook@chromium.org>2018-01-15 23:07:44 +0300
commit4f5e838605c264fcf16c3ff9495bd83da99acc6a (patch)
treeb4862e3ea2d12a0c6529a0734ea222909a73a785 /mm/usercopy.c
parentae64f9bd1d3621b5e60d7363bc20afb46aede215 (diff)
downloadlinux-4f5e838605c264fcf16c3ff9495bd83da99acc6a.tar.xz
usercopy: Remove pointer from overflow report
Using %p was already mostly useless in the usercopy overflow reports, so this removes it entirely to avoid confusion now that %p-hashing is enabled. Fixes: ad67b74d2469d9b8 ("printk: hash addresses printed with %p") Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'mm/usercopy.c')
-rw-r--r--mm/usercopy.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/mm/usercopy.c b/mm/usercopy.c
index a9852b24715d..5df1e68d4585 100644
--- a/mm/usercopy.c
+++ b/mm/usercopy.c
@@ -58,12 +58,11 @@ static noinline int check_stack_object(const void *obj, unsigned long len)
return GOOD_STACK;
}
-static void report_usercopy(const void *ptr, unsigned long len,
- bool to_user, const char *type)
+static void report_usercopy(unsigned long len, bool to_user, const char *type)
{
- pr_emerg("kernel memory %s attempt detected %s %p (%s) (%lu bytes)\n",
+ pr_emerg("kernel memory %s attempt detected %s '%s' (%lu bytes)\n",
to_user ? "exposure" : "overwrite",
- to_user ? "from" : "to", ptr, type ? : "unknown", len);
+ to_user ? "from" : "to", type ? : "unknown", len);
/*
* For greater effect, it would be nice to do do_group_exit(),
* but BUG() actually hooks all the lock-breaking and per-arch
@@ -261,6 +260,6 @@ void __check_object_size(const void *ptr, unsigned long n, bool to_user)
return;
report:
- report_usercopy(ptr, n, to_user, err);
+ report_usercopy(n, to_user, err);
}
EXPORT_SYMBOL(__check_object_size);