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Howlett" , Matthew Wilcox , , Subject: Re: [linux-next:master] [maple_tree] 540335e987: BUG:kernel_NULL_pointer_dereference,address Message-Id: <20250619154446.e9543f52bbc47e4bbd2cec29@linux-foundation.org> In-Reply-To: <202506191556.6bfc7b93-lkp@intel.com> References: <202506191556.6bfc7b93-lkp@intel.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspam-User: X-Stat-Signature: 57g9i819xkwd7jau3qtebmoebqbydpah X-Rspamd-Queue-Id: 83C6F1A0003 X-Rspamd-Server: rspam02 X-HE-Tag: 1750373088-809769 X-HE-Meta: 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 I/wOeQmT j3dPh0mLZDToZ/6h7NCgPuR9m1+ULb+Yyq4b8d1s+o5NOtgXH08qCdmkLJgdVJw/sRSDm6MBY76mp+uXrF0QhEpeK+WvrK08/7Tcjwos2yu1fsqIPgJ5dXdyST95MboiAv08Nj3Fuzdy63+lXAL2Mh+5YWqT6VTcjPwIfy5bXPCiZ5EgoDjuD4pvUVSyvb69RSJ6uiXcltpRB01iE/XlSEpYm93Tr92PMzfvyJgH++ZWN41aPGdIzhCl/O7zF6mz3HOPA0BELAkcYEGq3R6V8Umbw39FHI0JZLXB1nPV6lcFfvU6uZlL4BcSpdnc79TTD/VkQ0tI0RQ1vKKFVuHJ4IJFZcQ6c1urPMjBm7rwGa3zKbpes4tAoSk3hWxJ7A+V1zzffrugnRMJ99ry4o/P6KjyL8FBqO0h7ydOU X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, 19 Jun 2025 15:32:12 +0800 kernel test robot wrote: > kernel test robot noticed "BUG:kernel_NULL_pointer_dereference,address" on: > > commit: 540335e9878005bf238ab4e1f91e8df0e3091a03 ("maple_tree: restart walk on correct status") > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master > > [test failed on linux-next/master 6e5ab6fee68df8c40b338baeae6e269fa25a7e25] > > ... > > [ 85.008687][ T5293] RIP: 0010:mtree_range_walk (lib/maple_tree.c:2773) Seems this is if (pivots[0] >= mas->index) { It seems odd that mtree_range_walk() doesn't (and didn't) check for ma_pivots() returning NULL. Oh well, thanks, the report is solid - I'll drop the series.