On Thu, Jan 20, 2022 at 02:19:36PM +0100, Daniel Wagner wrote: > Hi Ming, > > On Thu, Jan 20, 2022 at 08:56:03PM +0800, Ming Lei wrote: > [323467.255527] BUG: kernel NULL pointer dereference, address: 0000000000000000 > [323467.255538] #PF: supervisor read access in kernel mode > [323467.255541] #PF: error_code(0x0000) - not-present page > [323467.255544] PGD 0 P4D 0 > [323467.255550] Oops: 0000 [#1] SMP PTI > [323467.255555] CPU: 13 PID: 17640 Comm: iostat Kdump: loaded Tainted: G IOE X 5.3.18-59.27-default #1 SLE15-SP3 > [323467.255559] Hardware name: Dell Inc. PowerEdge R940xa/08XR9M, BIOS 2.12.2 07/12/2021 > [323467.255569] RIP: 0010:blk_mq_queue_tag_busy_iter+0x1e4/0x2e0 Then Can you figure out where blk_mq_queue_tag_busy_iter+0x1e4 points to in source code? And what is NULL pointer? With this kind of info, we may know the root cause. Thanks, Ming
