linux-ext4 - [Bug 194695] size overflow detected in function ext4_mb_new_group

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Message-ID: <bug-194695-13602-Ue2yLGB1fr@https.bugzilla.kernel.org/>
Date:   Mon, 27 Feb 2017 20:55:18 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...nel.org
Subject: [Bug 194695] size overflow detected in function ext4_mb_new_group_pa

https://bugzilla.kernel.org/show_bug.cgi?id=194695

Andreas Dilger (adilger.kernelbugzilla@...ger.ca) changed:

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                 CC|                            |adilger.kernelbugzilla@...g
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--- Comment #1 from Andreas Dilger (adilger.kernelbugzilla@...ger.ca) ---
Definitely looks like a real bug in:

        pa->pa_pstart = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);
        pa->pa_lstart = pa->pa_pstart;

pa_pstart is 64-bit, pa_lstart is 32-bit.

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