[kernel] Various minor kernel bug fixes found by AI by ghaerr · Pull Request #2670 · ghaerr/elks (original) (raw)

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This PR adds the following mostly minor fixes, found by AI in #2646:

• Disallow master PTY writing into slave input queue when closed and queue freed.
• Check enough user stack available for signal stack frame when crafting application signal callback, otherwise terminate process with SIGSEGV.
• Fix potential buf[2] overwrite in xms_fmemcpyb when XMS=int15 amidst multiple interrupts (rare or not possible).
• Fix FAT filesystem internal buffer longname[14] overwrite on 14-character long filename conversion.
• Fix pipe open w/O_NONBLOCK|O_WRONLY from leaking PIPE_WRITERS when no readers.
• Fix reused super block entries not fully cleared across mounts, possibly allowing stale fields to be reused.
• Fix return value in sock_register (never checked).
• Disallow fmemalloc of zero paragraphs to prevent allocator corruption.
• Version number incremented to v0.9.1pre.

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