* Getting kernel crash
@ 2017-03-13 10:05 Umesh Patel
0 siblings, 0 replies; only message in thread
From: Umesh Patel @ 2017-03-13 10:05 UTC (permalink / raw)
To: linux-block
Hi,
I'm calling blk_queue_split kernel function from my driver to split larger =
BIO and that is working fine for block size 4K and 8K but getting below cra=
sh for block size 1M.
Using stable 4.10.1 kernel version
[ 890.227865] BUG: unable to handle kernel NULL pointer dereference at 000=
0000000000724
[ 890.305384] IP: _raw_spin_lock_irqsave+0x22/0x3f
[ 890.343896] PGD 0
[ 891.381744] Call Trace:
[ 891.415424] try_to_wake_up+0x40/0x3e0
[ 891.449074] ? mempool_free_slab+0x17/0x20
[ 891.483213] wake_up_process+0x15/0x20
[ 891.517492] blkdev_bio_end_io_simple+0x1d/0x20
[ 891.551363] bio_endio+0x56/0x60
Thx.
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