xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

signal/arm64: Push siginfo generation into arm64_notify_die

Browse Source 
Instead of generating a struct siginfo before calling arm64_notify_die
pass the signal number, tne sicode and the fault address into
arm64_notify_die and have it call force_sig_fault instead of
force_sig_info to let the generic code generate the struct siginfo.

This keeps code passing just the needed information into
siginfo generating code, making it easier to see what
is happening and harder to get wrong.  Further by letting
the generic code handle the generation of struct siginfo
it reduces the number of sites generating struct siginfo
making it possible to review them and verify that all
of the fiddly details for a structure passed to userspace
are handled properly.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2018-09-21 17:24:40 +02:00
parent f383d8b4ae
commit 6fa998e83e
4 changed files with 30 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arm64/include/asm/system_misc.h
View File

@@ -33,7 +33,8 @@ void die(const char *msg, struct pt_regs *regs, int err);
struct siginfo;
void arm64_notify_die(const char *str, struct pt_regs *regs,
struct siginfo *info, int err);
int signo, int sicode, void __user *addr,
int err);
void hook_debug_fault_code(int nr, int (*fn)(unsigned long, unsigned int,
struct pt_regs *),