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| author | Ghanshyam Agrawal <ghanshyam1898@gmail.com> | 2024-09-30 11:12:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-14 22:03:52 +0300 |
| commit | 52756a57e978e2706543a254f88f266cc6702f36 (patch) | |
| tree | ea320f610f365a30e7de4d1ec9b6bf49ecfa2d05 /fs/jfs | |
| parent | 22dcbf7661c6ffc3247978c254dc40b833a0d429 (diff) | |
| download | linux-52756a57e978e2706543a254f88f266cc6702f36.tar.xz | |
jfs: fix shift-out-of-bounds in dbSplit
[ Upstream commit a5f5e4698f8abbb25fe4959814093fb5bfa1aa9d ]
When dmt_budmin is less than zero, it causes errors
in the later stages. Added a check to return an error beforehand
in dbAllocCtl itself.
Reported-by: syzbot+b5ca8a249162c4b9a7d0@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=b5ca8a249162c4b9a7d0
Signed-off-by: Ghanshyam Agrawal <ghanshyam1898@gmail.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/jfs')
| -rw-r--r-- | fs/jfs/jfs_dmap.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c index 3ab410059dc2..39957361a7ee 100644 --- a/fs/jfs/jfs_dmap.c +++ b/fs/jfs/jfs_dmap.c @@ -1820,6 +1820,9 @@ dbAllocCtl(struct bmap * bmp, s64 nblocks, int l2nb, s64 blkno, s64 * results) return -EIO; dp = (struct dmap *) mp->data; + if (dp->tree.budmin < 0) + return -EIO; + /* try to allocate the blocks. */ rc = dbAllocDmapLev(bmp, dp, (int) nblocks, l2nb, results); |