Comment 0 for bug 2008157

SRU Justification:

[Impact]

When booted into Ubuntu 22.04.1 OS after installation, observed "Array Index out of bounds" Call Trace multiple times in dmesg.

Call Trace is as follow:
[ 6.125704] UBSAN: array-index-out-of-bounds in /build/linux-JjvoxS/linux-5.15.0/drivers/scsi/megaraid/megaraid_sas_fp.c:103:32
[ 6.125705] index 1 is out of range for type 'MR_LD_SPAN_MAP [1]'
[ 6.125707] CPU: 0 PID: 18 Comm: kworker/0:1 Not tainted 5.15.0-53-generic #59-Ubuntu
[ 6.125709] Hardware name: Dell Inc. , BIOS 11/08/2022
[ 6.125710] Workqueue: events work_for_cpu_fn
[ 6.125716] Call Trace:
[ 6.125718] <TASK>
[ 6.125720] show_stack+0x52/0x5c
[ 6.125725] dump_stack_lvl+0x4a/0x63
[ 6.125731] dump_stack+0x10/0x16
[ 6.125732] ubsan_epilogue+0x9/0x49
[ 6.125734] __ubsan_handle_out_of_bounds.cold+0x44/0x49
[ 6.125736] ? MR_PopulateDrvRaidMap+0x194/0x580 [megaraid_sas]
[ 6.125747] mr_update_load_balance_params+0xb9/0xc0 [megaraid_sas]
[ 6.125753] MR_ValidateMapInfo+0x8d/0x290 [megaraid_sas]
[ 6.125757] megasas_init_adapter_fusion+0x3ce/0x420 [megaraid_sas]
[ 6.125762] ? megasas_setup_reply_map+0x49/0xac [megaraid_sas]
[ 6.125768] megasas_init_fw.cold+0x87c/0x10c8 [megaraid_sas]
[ 6.125774] megasas_probe_one+0x15c/0x4e0 [megaraid_sas]
[ 6.125779] local_pci_probe+0x48/0x90
[ 6.125783] work_for_cpu_fn+0x17/0x30
[ 6.125785] process_one_work+0x228/0x3d0
[ 6.125786] worker_thread+0x223/0x420
[ 6.125787] ? process_one_work+0x3d0/0x3d0
[ 6.125788] kthread+0x127/0x150
[ 6.125790] ? set_kthread_struct+0x50/0x50
[ 6.125791] ret_from_fork+0x1f/0x30
[ 6.125796] </TASK>
[ 6.125796] ================================================================================

Steps to reproduce:
1. Connect PERC H355 controller to the system
2. Create RAID1 using drives connected to PERC Controller
3. Install Ubuntu 22.04.1 on VD
4. Boot into OS after installation
5. Multiple Call Traces of "array-index-out-of-bounds" are seen

Expected Behavior:
OS should boot without this Call Trace

[Fix]

[PATCH v3 0/6] Replace one-element arrays with flexible-array members
https://<email address hidden>/

48658213 scsi: megaraid_sas: Use struct_size() in code related to struct MR_PD_CFG_SEQ_NUM_SYNC

41e83026 scsi: megaraid_sas: Use struct_size() in code related to struct MR_FW_RAID_MAP

ee92366a scsi: megaraid_sas: Replace one-element array with flexible-array member in MR_PD_CFG_SEQ_NUM_SYNC

eeb3bab7 scsi: megaraid_sas: Replace one-element array with flexible-array member in MR_DRV_RAID_MAP

204a29a1 scsi: megaraid_sas: Replace one-element array with flexible-array member in MR_FW_RAID_MAP_DYNAMIC

ac23b92b scsi: megaraid_sas: Replace one-element array with flexible-array member in MR_FW_RAID_MAP

[Test Plan]

1. Connect PERC H355 controller to the system
2. Create RAID1 using drives connected to PERC Controller
3. Install Ubuntu 22.04.1 on VD
4. Boot into OS after installation
OS should boot without the Call Trace listed in the Impact field

[Where problems could occur]

[Other Info]

https://code.launchpad.net/~mreed8855/ubuntu/+source/linux/+git/jammy/+ref/array_bounds_lp_1999503