Bug 114871
| Summary: | bcache: "unable to handle kernel NULL pointer dereference" when trying to add a md caching device | ||
|---|---|---|---|
| Product: | IO/Storage | Reporter: | Sebastian Roesner (sroesner-kernelbugs) |
| Component: | Other | Assignee: | Michael Lyle (mlyle) |
| Status: | NEW --- | ||
| Severity: | normal | CC: | colyli, szg00000 |
| Priority: | P1 | ||
| Hardware: | Intel | ||
| OS: | Linux | ||
| Kernel Version: | 4.5.0 | Subsystem: | |
| Regression: | Yes | Bisected commit-id: | |
| Attachments: |
Traces and system information
trace 1 trace 2 lsblk bcache-super-show |
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Created attachment 209741 [details]
trace 1
Created attachment 209751 [details]
trace 2
Created attachment 209761 [details]
lsblk
Created attachment 209771 [details]
bcache-super-show
Does this problem still show up in Linux v5.5 or v5.6-rc ? Thanks. Coly Li |
Created attachment 209731 [details] Traces and system information I use bcache with 2 raid devices as the underlaying block devices. With 4.5.0 I got "BUG: unable to handle kernel NULL pointer dereference at 0000000000000028" when trying to add the cache device: echo /dev/md2 > /sys/fs/bcache/register With kernel 3.19 that worked fine, since it's a productive system I didn't try any other kernel versions in between.