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pds_core: use correct index to mask irq

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Use the qcq's interrupt index, not the irq number, to mask
the interrupt.  Since the irq number can be out of range from
the number of possible interrupts, we can end up accessing
and potentially scribbling on out-of-range and/or unmapped
memory, making the kernel angry.

    [ 3116.039364] BUG: unable to handle page fault for address: ffffbeea1c3edf84
    [ 3116.047059] #PF: supervisor write access in kernel mode
    [ 3116.052895] #PF: error_code(0x0002) - not-present page
    [ 3116.058636] PGD 100000067 P4D 100000067 PUD 1001f2067 PMD 10f82e067 PTE 0
    [ 3116.066221] Oops: 0002 [#1] SMP NOPTI
    [ 3116.092948] RIP: 0010:iowrite32+0x9/0x76
    [ 3116.190452] Call Trace:
    [ 3116.193185]  <IRQ>
    [ 3116.195430]  ? show_trace_log_lvl+0x1d6/0x2f9
    [ 3116.200298]  ? show_trace_log_lvl+0x1d6/0x2f9
    [ 3116.205166]  ? pdsc_adminq_isr+0x43/0x55 [pds_core]
    [ 3116.210618]  ? __die_body.cold+0x8/0xa
    [ 3116.214806]  ? page_fault_oops+0x16d/0x1ac
    [ 3116.219382]  ? exc_page_fault+0xbe/0x13b
    [ 3116.223764]  ? asm_exc_page_fault+0x22/0x27
    [ 3116.228440]  ? iowrite32+0x9/0x76
    [ 3116.232143]  pdsc_adminq_isr+0x43/0x55 [pds_core]
    [ 3116.237627]  __handle_irq_event_percpu+0x3a/0x184
    [ 3116.243088]  handle_irq_event+0x57/0xb0
    [ 3116.247575]  handle_edge_irq+0x87/0x225
    [ 3116.252062]  __common_interrupt+0x3e/0xbc
    [ 3116.256740]  common_interrupt+0x7b/0x98
    [ 3116.261216]  </IRQ>
    [ 3116.263745]  <TASK>
    [ 3116.266268]  asm_common_interrupt+0x22/0x27

Reported-by: Joao Martins <joao.m.martins@oracle.com>
Fixes: 01ba61b55b ("pds_core: Add adminq processing and commands")
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Link: https://lore.kernel.org/r/20231113183257.71110-2-shannon.nelson@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Shannon Nelson 2023-11-13 10:32:56 -08:00 committed by Jakub Kicinski
parent 17dd5efe5f
commit 09d4c14c6c
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/amd/pds_core/adminq.c
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@ -146,7 +146,7 @@ irqreturn_t pdsc_adminq_isr(int irq, void *data)
}
queue_work(pdsc->wq, &qcq->work);
pds_core_intr_mask(&pdsc->intr_ctrl[irq], PDS_CORE_INTR_MASK_CLEAR);
pds_core_intr_mask(&pdsc->intr_ctrl[qcq->intx], PDS_CORE_INTR_MASK_CLEAR);
return IRQ_HANDLED;
}