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authorEric W. Biederman <ebiederm@xmission.com>2018-04-17 15:26:37 -0500
committerEric W. Biederman <ebiederm@xmission.com>2018-04-25 10:40:51 -0500
commit3eb0f5193b497083391aa05d35210d5645211eef (patch)
tree65f009d4cdd5e407741a4431c0aacd40452779bd /arch/parisc/mm/fault.c
parentsignal/nds32: Use force_sig(SIGILL) in do_revisn (diff)
downloadlinux-dev-3eb0f5193b497083391aa05d35210d5645211eef.tar.xz
linux-dev-3eb0f5193b497083391aa05d35210d5645211eef.zip
signal: Ensure every siginfo we send has all bits initialized
Call clear_siginfo to ensure every stack allocated siginfo is properly initialized before being passed to the signal sending functions. Note: It is not safe to depend on C initializers to initialize struct siginfo on the stack because C is allowed to skip holes when initializing a structure. The initialization of struct siginfo in tracehook_report_syscall_exit was moved from the helper user_single_step_siginfo into tracehook_report_syscall_exit itself, to make it clear that the local variable siginfo gets fully initialized. In a few cases the scope of struct siginfo has been reduced to make it clear that siginfo siginfo is not used on other paths in the function in which it is declared. Instances of using memset to initialize siginfo have been replaced with calls clear_siginfo for clarity. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to '')
-rw-r--r--arch/parisc/mm/fault.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index e247edbca68e..657b35096bd8 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -356,6 +356,7 @@ bad_area:
struct siginfo si;
unsigned int lsb = 0;
+ clear_siginfo(&si);
switch (code) {
case 15: /* Data TLB miss fault/Data page fault */
/* send SIGSEGV when outside of vma */