test-initramfs: --kernel rt, the 32-bit QEMU leg for the RT series' exFAT symlink patch - #170
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mcfbytes merged 1 commit intoSep 12, 2026
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…s' patch 0031 The rig, still on an RT 7.2.3 kernel built 2026-09-05 (before PR #152's 7.x re-anchor of the exFAT symlink patch shipped there), Oopsed on the first symlink update_all.sh's Arcade Organizer created on /media/fat: PC 0x0 from page_symlink() via exfat_symlink() -- the NULL write_begin that the DE25's aarch64 QEMU leg had found on 2026-09-06. With CONFIG_PANIC_ON_OOPS=y and panic=15 the board rebooted 17 s later. Nothing executed that patch as 32-bit ARM: the DE10 QEMU leg builds at the shipped 6.18 pin with the shared (page_symlink) form, and the only runs of the 7.x rewrite were aarch64. `--kernel rt` (de10nano only) builds the same multi_v7 test kernel at BR2_PACKAGE_LINUX_RT_VERSION with linux-patches-beta/0031 and its own work/test-initramfs-rt* caches. ci-tests.sh runs its three exfat-driver cases after the DE10 leg. Verified locally at 7.2.4: symlink, exfat, fsck-request pass; the 6.18 form of the patch applied to the same 7.2.4 source reproduces the rig's Oops in QEMU (PC is at 0x0, LR is at page_symlink), so the leg catches the bug it exists for. The shipped 6.18.50 leg still passes symlink. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01V21CRKVv5f66XFNbcrteMD
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test-initramfs: --kernel rt, the 32-bit QEMU leg for the RT series' exFAT symlink patch
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Why
The rig, still on an RT 7.2.3 kernel built 2026-09-05 (before #152's 7.x re-anchor of board patch 0031 shipped there), panicked during
update_all.sh: the Arcade Organizer's first.mrasymlink on/media/fathitpage_symlink()→ NULLwrite_begin(netconsole:PC is at 0x0,LR is at page_symlink+0x90, fromexfat_symlink), andCONFIG_PANIC_ON_OOPS=y+panic=15rebooted the board 17 s later.Nothing had ever executed the 7.x rewrite of 0031 as 32-bit ARM: the DE10 QEMU leg builds at the shipped 6.18 pin with the shared patch, and the only runs of the rewrite were the DE25's aarch64 leg.
What
scripts/test-initramfs.sh --kernel rt(de10nano only): the same multi_v7 test kernel, built atBR2_PACKAGE_LINUX_RT_VERSIONwithlinux-patches-beta/0031, in its ownwork/test-initramfs-rt*caches.scripts/ci-tests.shruns its three exfat-driver cases (exfat,fsck-request,symlink) after the DE10 leg, gated like it (and onBR2_PACKAGE_LINUX_RT=y).docs/rt-beta-kernel.md,docs/de25-nano-tasks.md: the 32-bit gap is closed; a hardware boot of the fixed RT kernel is what remains.Verified
--kernel rt symlink exfat fsck-requestlinux-patches-beta/(rewrite)symlinkFAILS with the rig's exact Oops (PC is at 0x0,LR is at page_symlink)symlink(default leg)Stacked on #169.
🤖 Generated with Claude Code
https://claude.ai/code/session_01V21CRKVv5f66XFNbcrteMD