RDMA/irdma: Fix KASAN issue with tasklet
authorMike Marciniszyn <mike.marciniszyn@intel.com>
Wed, 31 Jan 2024 23:38:46 +0000 (17:38 -0600)
committerLeon Romanovsky <leon@kernel.org>
Sun, 4 Feb 2024 09:36:25 +0000 (11:36 +0200)
commitbd97cea7b18a0a553773af806dfbfac27a7c4acb
treef78fbf396a7b5e6538da8c9db39be8c3681bb0cd
parentbe551ee1574280ef8afbf7c271212ac3e38933ef
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>
drivers/infiniband/hw/irdma/hw.c