Re: [PATCH v6.13] fs/netfs/read_collect: fix crash due to uninitialized `prev` variable

Max Kellermann max.kellermann@ionos.com wrote:

When checking whether the edges of adjacent subrequests touch, the `prev` variable is deferenced, but it might not have been initialized. This causes crashes like this one:

BUG: unable to handle page fault for address: 0000000181343843 ...

Fixes: ee4cdf7ba857 ("netfs: Speed up buffered reading") Cc: stable@vger.kernel.org Signed-off-by: Max Kellermann max.kellermann@ionos.com

Signed-off-by: David Howells dhowells@redhat.com