diff options
| author | Breno Leitao <leitao@debian.org> | 2025-07-16 02:42:01 -0700 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2025-07-17 11:07:15 +0100 |
| commit | d7ce7e3a84642aadf7c4787f7ec4f58eb163d129 (patch) | |
| tree | 9c35b2d346acc71a99205be5afd5789f7f707399 | |
| parent | 75fdf823f94b18fa29ecbad9f39ecf8c57e8b8c6 (diff) | |
arm64: Mark kernel as tainted on SAE and SError panic
Set TAINT_MACHINE_CHECK when SError or Synchronous External Abort (SEA)
interrupts trigger a panic to flag potential hardware faults. This
tainting mechanism aids in debugging and enables correlation of
hardware-related crashes in large-scale deployments.
This change aligns with similar patches[1] that mark machine check
events when the system crashes due to hardware errors.
Link: https://lore.kernel.org/all/20250702-add_tain-v1-1-9187b10914b9@debian.org/ [1]
Signed-off-by: Breno Leitao <leitao@debian.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20250716-vmcore_hw_error-v2-1-f187f7d62aba@debian.org
Signed-off-by: Will Deacon <will@kernel.org>
| -rw-r--r-- | arch/arm64/kernel/traps.c | 1 | ||||
| -rw-r--r-- | arch/arm64/mm/fault.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 9bfa5c944379..7468b22585ce 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -931,6 +931,7 @@ void __noreturn panic_bad_stack(struct pt_regs *regs, unsigned long esr, unsigne void __noreturn arm64_serror_panic(struct pt_regs *regs, unsigned long esr) { + add_taint(TAINT_MACHINE_CHECK, LOCKDEP_STILL_OK); console_verbose(); pr_crit("SError Interrupt on CPU%d, code 0x%016lx -- %s\n", diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index ec0a337891dd..004106ff4bd0 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -826,6 +826,7 @@ static int do_sea(unsigned long far, unsigned long esr, struct pt_regs *regs) */ siaddr = untagged_addr(far); } + add_taint(TAINT_MACHINE_CHECK, LOCKDEP_STILL_OK); arm64_notify_die(inf->name, regs, inf->sig, inf->code, siaddr, esr); return 0; |