[CCing the regression list, as it should be in the loop for regressions: https://docs.kernel.org/admin-guide/reporting-regressions.html] [TLDR: I'm adding this report to the list of tracked Linux kernel regressions; the text you find below is based on a few templates paragraphs you might have encountered already in similar form. See link in footer if these mails annoy you.] On 10.07.23 16:42, Mark Brown wrote: > On Thu, Jun 08, 2023 at 06:21:41PM -0700, Hugh Dickins wrote: >> vmalloc_to_page() was using pte_offset_map() (followed by pte_unmap()), >> but it's intended for userspace page tables: prefer pte_offset_kernel(). >> >> Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx> >> Reviewed-by: Lorenzo Stoakes <lstoakes@xxxxxxxxx> > > Currently Linus' tree is reliably failing to boot on pine64plus, an > arm64 SBC. Most other boards seem fine, though I am seeing some > additional instability on Tritium which is another Allwinner platform, > I've not dug into that yet and Tritium is generally less stable. > > We end up seeing NULL or otherwise bad pointer dereferences, the > [...] > # first bad commit: [0d1c81edc61e553ed7a5db18fb8074c8b78e1538] mm/vmalloc: vmalloc_to_page() use pte_offset_kernel() Thanks for the report. To be sure the issue doesn't fall through the cracks unnoticed, I'm adding it to regzbot, the Linux kernel regression tracking bot: #regzbot ^introduced 0d1c81edc61e553ed7a5db18fb8074c8 #regzbot title mm/vmalloc: NULL or otherwise bad pointer dereferences on ARM64 #regzbot ignore-activity This isn't a regression? This issue or a fix for it are already discussed somewhere else? It was fixed already? You want to clarify when the regression started to happen? Or point out I got the title or something else totally wrong? Then just reply and tell me -- ideally while also telling regzbot about it, as explained by the page listed in the footer of this mail. Developers: When fixing the issue, remember to add 'Link:' tags pointing to the report (the parent of this mail). See page linked in footer for details. Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr That page also explains what to do if mails like this annoy you.
