From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6ED2EC433F5 for ; Tue, 11 Oct 2022 10:35:43 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id EF8376B0072; Tue, 11 Oct 2022 06:35:42 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EA8386B0073; Tue, 11 Oct 2022 06:35:42 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D493C6B0074; Tue, 11 Oct 2022 06:35:42 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id BDE1A6B0072 for ; Tue, 11 Oct 2022 06:35:42 -0400 (EDT) Received: from smtpin18.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 61E44A065A for ; Tue, 11 Oct 2022 10:35:42 +0000 (UTC) X-FDA: 80008312524.18.57FD847 Received: from mail-yb1-f179.google.com (mail-yb1-f179.google.com [209.85.219.179]) by imf10.hostedemail.com (Postfix) with ESMTP id 8C32DC0020 for ; Tue, 11 Oct 2022 10:35:40 +0000 (UTC) Received: by mail-yb1-f179.google.com with SMTP id e20so15954232ybh.2 for ; Tue, 11 Oct 2022 03:35:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=to:subject:message-id:date:from:mime-version:from:to:cc:subject :date:message-id:reply-to; bh=rzNvOa8WOi+xWhHnQNhl0uCO6UkhnZs85X0a5U4+CDc=; b=G9tHwmr+QOZzP1yLiAoiV3OwKXLthy7aZVbCSAJG+5fPT2rlbwwsrHnv3VdMhuqBx+ SzzAzjndmAJ+0BQKjUnLKBiuR+FUSFGQEyX0D5Sk87NfcppMy9Fh4W8SFNuGUjFGq1rE O6C4lRxB3B8Cvez7IVZaeUUxua2QnsQq6EOIkAwP7/FrrCQdI3muRnbijf//kX3+rWHm Sk7ZPYk7+Y2DQyJKu7EFCr/i0qQRzNpCn5uUMyvwyCedn/TfUoaFjBg7XcjKFuDvBfAs NZcg24r1HYZ4u/MpbaBaR8zh42B/D+Ucm4iKenRfPhCS+N0Y4wUVqiXWTQUubfJt9O/d iUrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=rzNvOa8WOi+xWhHnQNhl0uCO6UkhnZs85X0a5U4+CDc=; b=FD5zamiaz6skdI43T5SlV6SIQVk3R9F0Ar9TmY6fUqX3Q0CvtDrY/gtzz5A6SMMOpO W0KKT9zOqu+yzv2ODBOQ8pT/AO1OeFt4QkQVYKj9/yiQD4FLH74rGvNloEGStDHeVz2d AI9+4f8Y49I64reBoGliRhnwCY8x5pD+OCTauO9MxlIgKxvlm8n7PN6drONBZ60zF274 anpjeqJhOZH3GZAwNMk77bd3rAOdBclMO9TuGI0lE91ecxs4LY+IRKd0md91BDgsXIht HliHkLGuCSc828WWRVri66Te5wqrfDnHKPL7MJaNWENIRxC0pu4pktntXencerWl566+ i3YQ== X-Gm-Message-State: ACrzQf0PgxVlBiqcja+FCfpnNds2mUO1qotpUuqWQtMk0K2qwFZ6Iikd ypU7gBZdUomw6PyN8Oww9GUhheg9DpcLKmL2vYU= X-Google-Smtp-Source: AMsMyM74MLBWBesjZsfBsEbm3HZVQuMkixrssVnqNSPNqo3bsKC1KzMkWid2BXKdSRwpamIc7nSYHJ5qHenj3cGqAk4= X-Received: by 2002:a5b:842:0:b0:6a3:cf26:755d with SMTP id v2-20020a5b0842000000b006a3cf26755dmr20833901ybq.608.1665484539728; Tue, 11 Oct 2022 03:35:39 -0700 (PDT) MIME-Version: 1.0 From: Lukas Bulwahn Date: Tue, 11 Oct 2022 12:35:29 +0200 Message-ID: Subject: Observed recent memory leak in __anon_vma_prepare To: "Liam R. Howlett" , Andrew Morton , Linux-MM , kernel-janitors , Linux Kernel Mailing List , maple-tree@lists.infradead.org, Matthew Wilcox Content-Type: text/plain; charset="UTF-8" ARC-Authentication-Results: i=1; imf10.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=G9tHwmr+; spf=pass (imf10.hostedemail.com: domain of lukas.bulwahn@gmail.com designates 209.85.219.179 as permitted sender) smtp.mailfrom=lukas.bulwahn@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1665484540; a=rsa-sha256; cv=none; b=e41Whrs4h1Bj3C2LUrqn5MF4iaKu37sSI5FnLE9cxU5OgQmmEph0/LlOs2IJ86y8ExtuD/ EaYYCX9UJF/bvSinr5Fa6rHt/iwlWCPWObpl85EPvQ2Wkd/cxdjihI6pnDpGp0q5hkLMWR Cw1/H3BQQcu5Mmu1zFcWAGPaOWwRse8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1665484540; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding:in-reply-to: references:dkim-signature; bh=rzNvOa8WOi+xWhHnQNhl0uCO6UkhnZs85X0a5U4+CDc=; b=gAq6+1lBWiHhByMSvP7DXjmN5E7JXfNfAWYHeuMji9xfhe7dUDl63BC6vut9wT5wkUTcxM JSfmbpKp2G4CL/rwxIESMiP+0iVZuKRxSi+Ww2yfQZAHcDF3qLB0n2CJYVRhGiD65wu7PQ 4aEHa+3C89sk5QJkDLG+4GiheHJyAKY= X-Rspamd-Queue-Id: 8C32DC0020 X-Rspam-User: Authentication-Results: imf10.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=G9tHwmr+; spf=pass (imf10.hostedemail.com: domain of lukas.bulwahn@gmail.com designates 209.85.219.179 as permitted sender) smtp.mailfrom=lukas.bulwahn@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Rspamd-Server: rspam10 X-Stat-Signature: jxbzrx7buk37o98nrd4rsj3gj7x1nmrc X-HE-Tag: 1665484540-2513 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: Dear Liam, dear Matthew, dear all, The reproducer for the 'memory leak in __anon_vma_prepare' bug (see https://elisa-builder-00.iol.unh.edu/syzkaller-next/report?id=3113810b9abd3dfeb581759df93d3171d1a90f18) is reproducible, it is triggering the memory leak on the current mainline (commit 60bb8154d1d7), and it was not triggering on v6.0. My build config is a x86_64 defconfig. My git bisection showed that: 524e00b36e8c547f5582eef3fb645a8d9fc5e3df is the first bad commit commit 524e00b36e8c547f5582eef3fb645a8d9fc5e3df Author: Liam R. Howlett Date: Tue Sep 6 19:48:48 2022 +0000 The git bisect log is below, note that the commits 7fdbd37da5c6, d0cf3dd47f0d and 0c563f148043 are marked good in the git bisect as they caused bugs "BUG: Bad rss-counter state mm: ... type:MM_ANONPAGES val:2". This bug report might have overshadowed the actual issue, and hence the bug might have been introduced earlier, but was only visible once the Bad rss-counter state bug disappeared. git bisect start # bad: [60bb8154d1d77042a5d43d335a68fdb202302cbe] Merge tag 'xfs-6.1-for-linus' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux git bisect bad 60bb8154d1d77042a5d43d335a68fdb202302cbe # good: [4fe89d07dcc2804c8b562f6c7896a45643d34b2f] Linux 6.0 git bisect good 4fe89d07dcc2804c8b562f6c7896a45643d34b2f # good: [ff6862c23d2e83d12d1759bf4337d41248fb4dc8] Merge tag 'arm-drivers-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc git bisect good ff6862c23d2e83d12d1759bf4337d41248fb4dc8 # good: [e8bc52cb8df80c31c73c726ab58ea9746e9ff734] Merge tag 'driver-core-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core git bisect good e8bc52cb8df80c31c73c726ab58ea9746e9ff734 # good: [4899a36f91a9f9b06878471096bd143e7253006d] Merge tag 'powerpc-6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux git bisect good 4899a36f91a9f9b06878471096bd143e7253006d # good: [0e0073eb1b60f4ec6faecea034a6772fe1409a88] Merge tag 'hyperv-next-signed-20221009' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux git bisect good 0e0073eb1b60f4ec6faecea034a6772fe1409a88 # bad: [2f3568017268fc34eb0b6b4b3163c0f2e619fde6] kasan: move kasan_get_*_meta to generic.c git bisect bad 2f3568017268fc34eb0b6b4b3163c0f2e619fde6 # good: [354ed597442952fb680c9cafc7e4eb8a76f9514c] mm: multi-gen LRU: kill switch git bisect good 354ed597442952fb680c9cafc7e4eb8a76f9514c # bad: [b3541d912a84dc40cabb516f2deeac9ae6fa30da] mm: delete unused MMF_OOM_VICTIM flag git bisect bad b3541d912a84dc40cabb516f2deeac9ae6fa30da # bad: [67e7c16764c3cbf84a57d441fba3474217ac08d6] mm/mmap: change do_brk_munmap() to use do_mas_align_munmap() git bisect bad 67e7c16764c3cbf84a57d441fba3474217ac08d6 # good: [e15e06a8392321a19d8ebdbdd7643b7fa8874c17] lib/test_maple_tree: add testing for maple tree git bisect good e15e06a8392321a19d8ebdbdd7643b7fa8874c17 # bad: [3b0e81a1cdc9afbddb0543d08e38edb4e33c4baf] mmap: change zeroing of maple tree in __vma_adjust() git bisect bad 3b0e81a1cdc9afbddb0543d08e38edb4e33c4baf # good: [7fdbd37da5c6ff002dc6d15e89a7708c2df4928e] mm/mmap: use the maple tree for find_vma_prev() instead of the rbtree git bisect good 7fdbd37da5c6ff002dc6d15e89a7708c2df4928e # good: [d0cf3dd47f0d5d3bc366063f455215b99b06d62b] damon: convert __damon_va_three_regions to use the VMA iterator git bisect good d0cf3dd47f0d5d3bc366063f455215b99b06d62b # bad: [524e00b36e8c547f5582eef3fb645a8d9fc5e3df] mm: remove rb tree. git bisect bad 524e00b36e8c547f5582eef3fb645a8d9fc5e3df # good: [0c563f148043569c81724ee0f9c5bad5a36b115a] proc: remove VMA rbtree use from nommu git bisect good 0c563f148043569c81724ee0f9c5bad5a36b115a # first bad commit: [524e00b36e8c547f5582eef3fb645a8d9fc5e3df] mm: remove rb tree. If there is more information needed or other bisection to be done, please let me know. Best regards, Lukas