Bug#1029968: bisecting we go...
Note an easier way to trigger the bug is cat /dev/vbi0 > /dev/null
WORKS https://snapshot.debian.org/archive/debian/20220101T024315Z/pool/main/l/linux-signed-amd64/linux-image-5.10.0-9-amd64_5.10.70-1_amd64.deb
linux-image-5.10.0-9-amd64_5.10.70-1_amd64.deb - kexecing in works
WORKS https://snapshot.debian.org/archive/debian/20220101T024315Z/pool/main/l/linux-signed-amd64/linux-image-5.15.0-2-amd64_5.15.5-2_amd64.deb
5.15.5-2
FAILS https://snapshot.debian.org/archive/debian/20220701T034227Z/pool/main/l/linux-signed-amd64/linux-image-amd64_5.18.5-1_amd64.deb
[ 98.154835] BUG: unable to handle page fault for address: ffffbc2480f40000
[ 98.154848] #PF: supervisor write access in kernel mode
[ 98.154853] #PF: error_code(0x000b) - reserved bit violation
That 5.18 failure is a bit different, but the backtrace is similar;
somewhere between 5.18 it's changed from a BUG to a WARN but
back in 5.15 it just worked.
Dave
--
-----Open up your eyes, open up your mind, open up your code -------
/ Dr. David Alan Gilbert | Running GNU/Linux | Happy \
\ dave @ treblig.org | | In Hex /
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