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linter: block the resizing signal while reading output from the linter

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This prevents read() from returning unexpectedly and causing a crash.

This fixes https://savannah.gnu.org/bugs/?60537.
Reported-by: Filips Romāns <frfilips@gmail.com>

Bug existed since version 2.4.2, since the handling of SIGWINCH changed.
This commit is contained in:
Benno Schulenberg 2021-05-06 13:06:22 +02:00
parent c01b13a32c
commit 4712d46462
1 changed files with 5 additions and 0 deletions
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5
src/text.c
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@ -2610,6 +2610,9 @@ void do_linter(void)
return; return;
} }
/* Block resizing signals while reading from the pipe. */
block_sigwinch(TRUE);
/* Read in the returned syntax errors. */ /* Read in the returned syntax errors. */
totalread = 0; totalread = 0;
buffersize = pipesize + 1; buffersize = pipesize + 1;
@ -2626,6 +2629,8 @@ void do_linter(void)
*pointer = '\0'; *pointer = '\0';
close(lint_fd[0]); close(lint_fd[0]);
block_sigwinch(FALSE);
/* Process the linter output. */ /* Process the linter output. */
pointer = lintings; pointer = lintings;
onelint = lintings; onelint = lintings;