Merge branch 'Fix offset when fault occurs in strncpy_from_kernel_nofault()'

Alban Crequy says:

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Hi,

This is v2 of the fix & selftest previously sent at:
https://lore.kernel.org/linux-mm/20221108195211.214025-1-flaniel@linux.microsoft.com/

Changes v1 to v2:
- add 'cc:stable', 'Fixes:' and review/ack tags
- update commitmsg and fix my email
- rebase on bpf tree and tag for bpf tree

Thanks!
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Signed-off-by: Andrii Nakryiko <andrii@kernel.org>