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| author |   Paul E. McKenney <paulmck@kernel.org> | 2020-09-10 11:54:42 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-11-19 19:37:17 -0800 |
| commit | 50edb988534c621a56ca103c0c16ac59e7399f01 (patch) | |
| tree | f923f4e709fdfeb57409ea54367190a79649e4a4 /drivers/usb/cdns3/cdns3-imx.c | |
| parent | rcu/tree: Defer kvfree_rcu() allocation to a clean context (diff) | |
| download | linux-dev-50edb988534c621a56ca103c0c16ac59e7399f01.tar.xz linux-dev-50edb988534c621a56ca103c0c16ac59e7399f01.zip | |
srcu: Take early exit on memory-allocation failure
It turns out that init_srcu_struct() can be invoked from usermode tasks,
and that fatal signals received by these tasks can cause memory-allocation
failures. These failures are not handled well by init_srcu_struct(),
so much so that NULL pointer dereferences can result. This commit
therefore causes init_srcu_struct() to take an early exit upon detection
of memory-allocation failure.
Link: https://lore.kernel.org/lkml/20200908144306.33355-1-aik@ozlabs.ru/
Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-imx.c')
0 files changed, 0 insertions, 0 deletions