[PATCH v2 0/2] PCI/AER: Fix ghes_estatus_pool memory leaks in error handling

When firmware reports PCIe Advanced Error Reporting (AER) events via ACPI
APEI GHES (ghes_handle_aer()), it allocates a snapshot buffer from
ghes_estatus_pool to store the aer_capability_regs registers before
enqueuing the error record into aer_recover_ring.

If the error record cannot be enqueued or if the dequeued record cannot be
processed, the pool memory allocated for aer_capability_regs must be released.
Otherwise, unhandled errors silently leak memory in ghes_estatus_pool,
eventually leading to pool exhaustion and breaking system-wide GHES hardware
error reporting.

This series fixes two memory leaks in PCIe AER error handling:

Patch 1: Fixes a memory leak in aer_recover_queue() when kfifo_in_spinlocked()
         fails due to a buffer overflow (aer_recover_ring capacity of 16 full).
         The rejected entry is immediately freed via ghes_estatus_pool_region_free().

Patch 2: Fixes a memory leak in aer_recover_work_func() when a dequeued entry
         cannot be mapped to an active PCI device (pdev is NULL). Refactors the
         loop so ghes_estatus_pool_region_free() is called unconditionally for
         every dequeued item.

Changes in v2:
  - Refactored aer_recover_work_func() to ensure ghes_estatus_pool_region_free()
    is called unconditionally for every dequeued item.
  - Added Patch 1 to fix related memory leak in aer_recover_queue() on kfifo
    buffer overflow.
  - Updated commit messages with detailed pool allocation and lifecycle explanations.

Priyank Rathod (2):
  PCI/AER: Fix memory leak in aer_recover_queue() on kfifo buffer overflow
  PCI/AER: Fix memory leak in aer_recover_work_func() when pci_dev is missing

 drivers/pci/pcie/aer.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

Signed-off-by: Priyank Rathod <[email protected]>
---
Changes in v2:
- Refactored aer_recover_work_func() to ensure ghes_estatus_pool_region_free()
  is called unconditionally for every dequeued record.
- Added Patch 1 to fix related memory leak in aer_recover_queue() on kfifo
  buffer overflow.
- Link to v1: https://lore.kernel.org/r/[email protected]

---
Priyank Rathod (2):
      PCI/AER: Fix memory leak in aer_recover_queue() on kfifo buffer overflow
      PCI/AER: Fix memory leak in aer_recover_work_func() when pci_dev is missing

 drivers/pci/pcie/aer.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)
---
base-commit: 248951ddc14de84de3910f9b13f51491a8cd91df
change-id: 20260803-b4-fix-aer-memleaks-524a1bd5e888

Best regards,
-- 
Priyank Rathod <[email protected]>