Control run, unpatched out-of-tree build of the same source. BUG_ON at 29.4 s,
56,013,951 inline mappings, 76 distinct offset_in_page values, 1 mapping
violating iomap->length <= PAGE_SIZE - offset_in_page(iomap->inline_data).
The bpftrace [DANGER] line predicting the crash is interleaved character by
character with the oops text around the "kernel BUG at fs/iomap" line, because
bpftrace and the kernel share the serial console. Deinterleaved it reads:
[DANGER] off=4032 len=160 sum=4192 -- BUG_ON next
matching RDX=0xfc0, RSI=0xa0, RAX=0x40 in the oops registers below it.
qemu was killed 45 s after the hit, which is why the run length is 60 s.
** Attachment added: "Control run, unpatched: BUG_ON at 29.4 s (boot console
log)"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2165844/+attachment/6000955/+files/boot-vanilla.log
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https://bugs.launchpad.net/bugs/2165844
Title:
linux 7.0.0-30: kernel BUG at fs/iomap/buffered-io.c:1061 in
iomap_write_end() on ntfs3 buffered write
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