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authorMike Marciniszyn <mike.marciniszyn@intel.com>2024-02-01 02:38:46 +0300
committerLeon Romanovsky <leon@kernel.org>2024-02-04 12:36:25 +0300
commitbd97cea7b18a0a553773af806dfbfac27a7c4acb (patch)
treef78fbf396a7b5e6538da8c9db39be8c3681bb0cd /drivers/infiniband
parentbe551ee1574280ef8afbf7c271212ac3e38933ef (diff)
downloadlinux-bd97cea7b18a0a553773af806dfbfac27a7c4acb.tar.xz
RDMA/irdma: Fix KASAN issue with tasklet
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@intel.com> Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com> Signed-off-by: Sindhu Devale <sindhu.devale@intel.com> Link: https://lore.kernel.org/r/20240131233849.400285-2-sindhu.devale@intel.com Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/irdma/hw.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/irdma/hw.c b/drivers/infiniband/hw/irdma/hw.c
index bd4b2b896444..2f8d18d8be3b 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);
+ }
}
/**