Patch "RDMA/irdma: Fix KASAN issue with tasklet" has been added to the 6.7-stable tree

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This is a note to let you know that I've just added the patch titled

    RDMA/irdma: Fix KASAN issue with tasklet

to the 6.7-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     rdma-irdma-fix-kasan-issue-with-tasklet.patch
and it can be found in the queue-6.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 0e585678b105c0db42f337fe3920444bdc3aeefe
Author: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxx>
Date:   Wed Jan 31 17:38:46 2024 -0600

    RDMA/irdma: Fix KASAN issue with tasklet
    
    [ Upstream commit bd97cea7b18a0a553773af806dfbfac27a7c4acb ]
    
    KASAN testing revealed the following issue assocated with freeing an IRQ.
    
    [50006.466686] Call Trace:
    [50006.466691]  <IRQ>
    [50006.489538]  dump_stack+0x5c/0x80
    [50006.493475]  print_address_description.constprop.6+0x1a/0x150
    [50006.499872]  ? irdma_sc_process_ceq+0x483/0x790 [irdma]
    [50006.505742]  ? irdma_sc_process_ceq+0x483/0x790 [irdma]
    [50006.511644]  kasan_report.cold.11+0x7f/0x118
    [50006.516572]  ? irdma_sc_process_ceq+0x483/0x790 [irdma]
    [50006.522473]  irdma_sc_process_ceq+0x483/0x790 [irdma]
    [50006.528232]  irdma_process_ceq+0xb2/0x400 [irdma]
    [50006.533601]  ? irdma_hw_flush_wqes_callback+0x370/0x370 [irdma]
    [50006.540298]  irdma_ceq_dpc+0x44/0x100 [irdma]
    [50006.545306]  tasklet_action_common.isra.14+0x148/0x2c0
    [50006.551096]  __do_softirq+0x1d0/0xaf8
    [50006.555396]  irq_exit_rcu+0x219/0x260
    [50006.559670]  irq_exit+0xa/0x20
    [50006.563320]  smp_apic_timer_interrupt+0x1bf/0x690
    [50006.568645]  apic_timer_interrupt+0xf/0x20
    [50006.573341]  </IRQ>
    
    The issue is that a tasklet could be pending on another core racing
    the delete of the irq.
    
    Fix by insuring any scheduled tasklet is killed after deleting the
    irq.
    
    Fixes: 44d9e52977a1 ("RDMA/irdma: Implement device initialization definitions")
    Signed-off-by: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxx>
    Signed-off-by: Shiraz Saleem <shiraz.saleem@xxxxxxxxx>
    Signed-off-by: Sindhu Devale <sindhu.devale@xxxxxxxxx>
    Link: https://lore.kernel.org/r/20240131233849.400285-2-sindhu.devale@xxxxxxxxx
    Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/infiniband/hw/irdma/hw.c b/drivers/infiniband/hw/irdma/hw.c
index bd4b2b8964444..2f8d18d8be3b7 100644
--- a/drivers/infiniband/hw/irdma/hw.c
+++ b/drivers/infiniband/hw/irdma/hw.c
@@ -570,6 +570,13 @@ static void irdma_destroy_irq(struct irdma_pci_f *rf,
 	dev->irq_ops->irdma_dis_irq(dev, msix_vec->idx);
 	irq_update_affinity_hint(msix_vec->irq, NULL);
 	free_irq(msix_vec->irq, dev_id);
+	if (rf == dev_id) {
+		tasklet_kill(&rf->dpc_tasklet);
+	} else {
+		struct irdma_ceq *iwceq = (struct irdma_ceq *)dev_id;
+
+		tasklet_kill(&iwceq->dpc_tasklet);
+	}
 }
 
 /**




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