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ANDROID: arm64: add vendor hooks for bti and pauth fault

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Add hooks to gather data of unusual aborts and summarize it with
other information.

Bug: 203187389

Signed-off-by: Sangmoon Kim <sangmoon.kim@samsung.com>
Change-Id: I37b3047e72f64dc210d3d3bffe5ee207daeba8d6
This commit is contained in:
Sangmoon Kim 2021-10-15 20:45:13 +09:00
parent 129e04dc19
commit 06d074249f
3 changed files with 14 additions and 0 deletions
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2
arch/arm64/kernel/traps.c
View File

@ -414,6 +414,7 @@ NOKPROBE_SYMBOL(do_undefinstr);
void do_bti(struct pt_regs *regs)
{
trace_android_rvh_do_bti(regs, user_mode(regs));
BUG_ON(!user_mode(regs));
force_signal_inject(SIGILL, ILL_ILLOPC, regs->pc, 0);
}
@ -425,6 +426,7 @@ void do_ptrauth_fault(struct pt_regs *regs, unsigned int esr)
* Unexpected FPAC exception or pointer authentication failure in
* the kernel: kill the task before it does any more harm.
*/
trace_android_rvh_do_ptrauth_fault(regs, esr, user_mode(regs));
BUG_ON(!user_mode(regs));
force_signal_inject(SIGILL, ILL_ILLOPN, regs->pc, esr);
}

2
drivers/android/vendor_hooks.c
View File

@ -243,6 +243,8 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_alter_mutex_list_add);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mutex_unlock_slowpath);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_wake_finish);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_do_undefinstr);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_do_bti);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_do_ptrauth_fault);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_bad_mode);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_arm64_serror_panic);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_selinux_avc_insert);

10
include/trace/hooks/traps.h
View File

@ -17,6 +17,16 @@ DECLARE_RESTRICTED_HOOK(android_rvh_do_undefinstr,
TP_ARGS(regs, user),
TP_CONDITION(!user));
DECLARE_RESTRICTED_HOOK(android_rvh_do_bti,
TP_PROTO(struct pt_regs *regs, bool user),
TP_ARGS(regs, user),
TP_CONDITION(!user));
DECLARE_RESTRICTED_HOOK(android_rvh_do_ptrauth_fault,
TP_PROTO(struct pt_regs *regs, unsigned int esr, bool user),
TP_ARGS(regs, esr, user),
TP_CONDITION(!user));
DECLARE_RESTRICTED_HOOK(android_rvh_bad_mode,
TP_PROTO(struct pt_regs *regs, unsigned int esr, int reason),
TP_ARGS(regs, reason, esr), 1);