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When a C0 character is present in an OSC terminator (i.e. after the ESC but before a \ (0x5c) or printable character), vterm executes the control character and resets the current string fragment. If the C0 character is the final byte in the sequence, the string fragment has a zero length. However, because the VT parser is still in the "escape" state, vterm attempts to subtract 1 from the string length (to account for the escape character). When the string fragment is empty, this causes an underflow in the unsigned size variable, resulting in a buffer overflow. The fix is simple: explicitly check if the string length is non-zero before subtracting.
16 lines
400 B
Lua
16 lines
400 B
Lua
local n = require('test.functional.testnvim')()
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local clear = n.clear
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local api = n.api
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local assert_alive = n.assert_alive
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describe(':terminal', function()
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before_each(clear)
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it('handles invalid OSC terminators #30084', function()
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local chan = api.nvim_open_term(0, {})
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api.nvim_chan_send(chan, '\027]8;;https://example.com\027\\Example\027]8;;\027\n')
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assert_alive()
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end)
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end)
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