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bc042fdfbb
In the case where a dimm does not have any associated flush hints the
ndrd->flush_wpq array may be uninitialized leading to crashes with the
following signature:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
IP: region_visible+0x10f/0x160 [libnvdimm]
Call Trace:
internal_create_group+0xbe/0x2f0
sysfs_create_groups+0x40/0x80
device_add+0x2d8/0x650
nd_async_device_register+0x12/0x40 [libnvdimm]
async_run_entry_fn+0x39/0x170
process_one_work+0x212/0x6c0
? process_one_work+0x197/0x6c0
worker_thread+0x4e/0x4a0
kthread+0x10c/0x140
? process_one_work+0x6c0/0x6c0
? kthread_create_on_node+0x60/0x60
ret_from_fork+0x31/0x40
Cc: <stable@vger.kernel.org>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Fixes:
|
||
|---|---|---|
| .. | ||
| blk.c | ||
| btt_devs.c | ||
| btt.c | ||
| btt.h | ||
| bus.c | ||
| claim.c | ||
| core.c | ||
| dax_devs.c | ||
| dimm_devs.c | ||
| dimm.c | ||
| e820.c | ||
| Kconfig | ||
| label.c | ||
| label.h | ||
| Makefile | ||
| namespace_devs.c | ||
| nd-core.h | ||
| nd.h | ||
| pfn_devs.c | ||
| pfn.h | ||
| pmem.c | ||
| pmem.h | ||
| region_devs.c | ||
| region.c | ||