From: syzbot <syzbot+594427aebfefeebe91c6@syzkaller.appspotmail.com>
To: linux-kernel@vger.kernel.org
Subject: Re: [syzbot] [syzbot] [bcachefs?] UBSAN: shift-out-of-bounds in rewrite_old_nodes_pred
Date: Sun, 05 May 2024 18:04:46 -0700 [thread overview]
Message-ID: <000000000000ce43380617bea7d1@google.com> (raw)
In-Reply-To: <0000000000000498630617b740d3@google.com>
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Subject: [syzbot] [bcachefs?] UBSAN: shift-out-of-bounds in rewrite_old_nodes_pred
Author: lizhi.xu@windriver.com
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 7367539ad4b0
diff --git a/fs/bcachefs/move.c b/fs/bcachefs/move.c
index bf68ea49447b..1768d46980e9 100644
--- a/fs/bcachefs/move.c
+++ b/fs/bcachefs/move.c
@@ -983,7 +983,7 @@ static bool bformat_needs_redo(struct bkey_format *f)
if ((f->bits_per_field[i] == unpacked_bits) && field_offset)
return true;
- if (((field_offset + ((1ULL << f->bits_per_field[i]) - 1)) &
+ if (((field_offset + (1ULL << (f->bits_per_field[i] - 1))) &
unpacked_mask) <
field_offset)
return true;
next prev parent reply other threads:[~2024-05-06 1:04 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-05 16:14 [syzbot] [bcachefs?] UBSAN: shift-out-of-bounds in rewrite_old_nodes_pred syzbot
2024-05-06 1:04 ` syzbot [this message]
2024-05-06 11:34 ` Edward Adam Davis
2024-05-06 12:08 ` syzbot
2024-05-07 19:11 ` syzbot
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