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pds_core: use correct index to mask irq

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[ Upstream commit 09d4c14c6c5e6e781a3879fed7f8e116a18b8c65 ]

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: 01ba61b55b20 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Shannon Nelson 2023-11-13 10:32:56 -08:00 committed by Greg Kroah-Hartman
parent 779334e598
commit f4cbba7e2f
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/amd/pds_core/adminq.c
View File

@ -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;
}