Hi, I'm currently trying to use mbsync with XOAUTH2 authentication (needed for Office365 mailboxes) and I encounter "Fatal: buffer too small. Please report a bug." error.
Debugging with GDB revealed that the access token used for the LOGIN command does not fit into the imap_vprintf buffer, which is currently 1000 characters long. In my case, I needed the buffer to hold at least 2000 characters. I see that in the current master, the size of the buffer can be increased by defining QPRINTF_BUFF during compilation, but for the latest released version 1.4.4, I'm using the following patch. To make the size of the buffer more future-proof, I increase the buffer size to 4000 characters. Maybe, somebody will find it useful. Best regards, -Michal >From e8a3a20aed135272a9ec0103f4055411c075f043 Mon Sep 17 00:00:00 2001 From: Michal Sojka <michal.so...@cvut.cz> Date: Mon, 7 Nov 2022 00:07:22 +0100 Subject: [PATCH] Increase imap_vprintf buffer size --- src/drv_imap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/drv_imap.c b/src/drv_imap.c index c5a7aed..7847192 100644 --- a/src/drv_imap.c +++ b/src/drv_imap.c @@ -528,7 +528,7 @@ imap_vprintf( const char *fmt, va_list ap ) uint totlen = 0; const char *segs[MAX_SEGS]; uint segls[MAX_SEGS]; - char buf[1000]; + char buf[4000]; d = buf; ed = d + sizeof(buf); -- 2.38.1 _______________________________________________ isync-devel mailing list isync-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/isync-devel