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Tue, 05 Sep 2023 10:36:04 -0700 (PDT) Date: Tue, 05 Sep 2023 10:36:03 -0700 In-Reply-To: <000000000000273d0105ff97bf56@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a677fc0604a00fef@google.com> Subject: Re: [syzbot] [mm?] WARNING in try_grab_page From: syzbot To: akpm@linux-foundation.org, axboe@kernel.dk, davem@davemloft.net, david@redhat.com, dhowells@redhat.com, edumazet@google.com, gregkh@linuxfoundation.org, herbert@gondor.apana.org.au, jlayton@kernel.org, kuba@kernel.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, nspmangalore@gmail.com, pabeni@redhat.com, patches@lists.linux.dev, rohiths.msft@gmail.com, sashal@kernel.org, stable@vger.kernel.org, stfrench@microsoft.com, svens@linux.ibm.com, syzkaller-bugs@googlegroups.com, willy@infradead.org Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 55CDF140008 X-Stat-Signature: o7qjrauxq8acu95i59pgwyuq53yzseqb X-HE-Tag: 1693935365-674244 X-HE-Meta: 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 QTHgkVVM 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 /l3emJNU cDGLX0uRC4G0qEiMjfDSxeaNiw1OhxXwWMOWP0dL/LsOY+4QSG3l1FGZ5FZmJ5yxQWDOryehSrXWpyoBtMHb44th4gRpmhE8rXvq8FPsin2yd2+7rdDjhBPbLCX8DEBHvq2lnuURy8FIbqBDz9S68q2/W+1h71PHqifRV163RGPglBuTDIgfbFK/7OJvmB8RQ75oN8hN+kGjCZ6B24+RQHMtJwsjfTg/8qbUieNax8jJApci9i3L43YaiuuU6NigDZlj/X+2V+LLE3CR/908Xg== 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: syzbot has found a reproducer for the following issue on: HEAD commit: 3f86ed6ec0b3 Merge tag 'arc-6.6-rc1' of git://git.kernel.o.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=139ce690680000 kernel config: https://syzkaller.appspot.com/x/.config?x=ff0db7a15ba54ead dashboard link: https://syzkaller.appspot.com/bug?extid=9b82859567f2e50c123e compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10b0c620680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=152da4e7a80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6f4f710c5033/disk-3f86ed6e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/555548fedbdc/vmlinux-3f86ed6e.xz kernel image: https://storage.googleapis.com/syzbot-assets/c06d7c39bbc0/bzImage-3f86ed6e.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/120cc7b707b8/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9b82859567f2e50c123e@syzkaller.appspotmail.com XFS (loop0): Quotacheck needed: Please wait. XFS (loop0): Quotacheck: Done. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5030 at mm/gup.c:229 try_grab_page+0x287/0x460 Modules linked in: CPU: 1 PID: 5030 Comm: syz-executor118 Not tainted 6.5.0-syzkaller-11704-g3f86ed6ec0b3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:try_grab_page+0x287/0x460 mm/gup.c:229 Code: 01 49 8d 7e 60 be 04 00 00 00 e8 54 41 18 00 f0 41 83 46 60 01 42 80 3c 2b 00 0f 85 6a ff ff ff e9 6d ff ff ff e8 b9 55 be ff <0f> 0b bb f4 ff ff ff eb b6 e8 ab 55 be ff 49 ff ce e9 ca fd ff ff RSP: 0018:ffffc90003a6ee88 EFLAGS: 00010293 RAX: ffffffff81cf4377 RBX: 0000000000000000 RCX: ffff888025da0000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 000000000000000e R08: ffffffff81cf418c R09: 1ffffd400039097e R10: dffffc0000000000 R11: fffff9400039097f R12: ffffea0001c84bf4 R13: dffffc0000000000 R14: ffffea0001c84bc0 R15: ffffea0001c84bc0 FS: 0000555555acb380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020008000 CR3: 00000000736e9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: follow_page_pte+0x560/0x18f0 mm/gup.c:651 follow_pud_mask mm/gup.c:765 [inline] follow_p4d_mask mm/gup.c:782 [inline] follow_page_mask+0x7dc/0xe20 mm/gup.c:832 __get_user_pages+0x643/0x15e0 mm/gup.c:1237 __get_user_pages_locked mm/gup.c:1504 [inline] get_dump_page+0x146/0x2b0 mm/gup.c:2018 dump_user_range+0x126/0x910 fs/coredump.c:913 elf_core_dump+0x3b75/0x4490 fs/binfmt_elf.c:2142 do_coredump+0x1b73/0x2ab0 fs/coredump.c:764 get_signal+0x145e/0x1840 kernel/signal.c:2878 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb68edcf0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc8b18d558 EFLAGS: 00000246 ORIG_RAX: 000000000000004d RAX: ffffffffffffffe5 RBX: 0000000000000003 RCX: 00007fb68edcf0f9 RDX: 0000000000000000 RSI: 0000000100000001 RDI: 0000000000000006 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000555500000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000f4240 R13: 00007ffc8b18d7c8 R14: 0000000000000001 R15: 00007ffc8b18d590 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.