Public bug reported:
[Impact]
Hotplugging a SATA disk into a SAS controller may trigger a NULL pointer
dereference, leading to a crash:
[ 2366.923208] Unable to handle kernel NULL pointer dereference
at virtual address 000007b8
...
[ 2368.766334] Call trace:
[ 2368.781712] [<ffffffc00065c3b0>] sas_find_dev_by_rphy+0x48/0x118
[ 2368.800394] [<ffffffc00065c4a8>] sas_target_alloc+0x28/0x98
[ 2368.817975] [<ffffffc00063e920>] scsi_alloc_target+0x248/0x308
[ 2368.835570] [<ffffffc000640080>] __scsi_add_device+0xb8/0x160
[ 2368.853034] [<ffffffc0006e52d8>] ata_scsi_scan_host+0x190/0x230
[ 2368.871614] [<ffffffc0006e54b0>] ata_scsi_hotplug+0xc8/0xe8
[ 2368.889152] [<ffffffc0000da75c>] process_one_work+0x164/0x438
[ 2368.908003] [<ffffffc0000dab74>] worker_thread+0x144/0x4b0
[ 2368.924613] [<ffffffc0000e0ffc>] kthread+0xfc/0x110
[Test Case]
Unplug a SATA disk from a SAS controller and insert a new SATA disk in its
place.
[Regression Risk]
The fix is a clean cherry-pick from upstream that is tagged for stable. No
subsequent patches in linux-next have a "Fixes:" marker referencing this patch,
suggesting no regressions have been found since its introduction.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: In Progress
** Affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: In Progress
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: New => In Progress
** Changed in: linux (Ubuntu Bionic)
Status: New => In Progress
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https://bugs.launchpad.net/bugs/1768948
Title:
Hotplugging a SATA disk into a SAS controller may cause crash
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Bionic:
In Progress
Bug description:
[Impact]
Hotplugging a SATA disk into a SAS controller may trigger a NULL pointer
dereference, leading to a crash:
[ 2366.923208] Unable to handle kernel NULL pointer dereference
at virtual address 000007b8
...
[ 2368.766334] Call trace:
[ 2368.781712] [<ffffffc00065c3b0>] sas_find_dev_by_rphy+0x48/0x118
[ 2368.800394] [<ffffffc00065c4a8>] sas_target_alloc+0x28/0x98
[ 2368.817975] [<ffffffc00063e920>] scsi_alloc_target+0x248/0x308
[ 2368.835570] [<ffffffc000640080>] __scsi_add_device+0xb8/0x160
[ 2368.853034] [<ffffffc0006e52d8>] ata_scsi_scan_host+0x190/0x230
[ 2368.871614] [<ffffffc0006e54b0>] ata_scsi_hotplug+0xc8/0xe8
[ 2368.889152] [<ffffffc0000da75c>] process_one_work+0x164/0x438
[ 2368.908003] [<ffffffc0000dab74>] worker_thread+0x144/0x4b0
[ 2368.924613] [<ffffffc0000e0ffc>] kthread+0xfc/0x110
[Test Case]
Unplug a SATA disk from a SAS controller and insert a new SATA disk in its
place.
[Regression Risk]
The fix is a clean cherry-pick from upstream that is tagged for stable. No
subsequent patches in linux-next have a "Fixes:" marker referencing this patch,
suggesting no regressions have been found since its introduction.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1768948/+subscriptions
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