diff options
| author | Joey Gouly <joey.gouly@arm.com> | 2026-01-27 13:39:26 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2026-01-28 16:39:24 +0000 |
| commit | 1f3b950492db411e6c30ee0076b61ef2694c100a (patch) | |
| tree | 1c793b83e8d14ee74c0f0fded28129bc9351f69e /tools/perf/lib/Documentation/tutorial/git@git.tavy.me:linux.git | |
| parent | a4e5927115f30a301f9939ed43e6a21a343e06ad (diff) | |
arm64: poe: fix stale POR_EL0 values for ptrace
If a process wrote to POR_EL0 and then crashed before a context switch
happened, the coredump would contain an incorrect value for POR_EL0.
The value read in poe_get() would be a stale value left in thread.por_el0. Fix
this by reading the value from the system register, if the target thread is the
current thread.
This matches what gcs/fpsimd do.
Fixes: 175198199262 ("arm64/ptrace: add support for FEAT_POE")
Reported-by: David Spickett <david.spickett@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Kevin Brodsky <kevin.brodsky@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'tools/perf/lib/Documentation/tutorial/git@git.tavy.me:linux.git')
0 files changed, 0 insertions, 0 deletions