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AFNElJ/Fd6YG+ei2OLJ0hHtl7rixxvbkqMn6T1s7V0uGp+n0L/j8MC0nMhP7MFDzlhca/Qb8RpgW/ALgIQ==@vger.kernel.org X-Gm-Message-State: AOJu0YyYIMsH/71oFbss1gahJO9CXZE4na6rdCJWO8bn4wXnGJ6eR08f pwpVPtPEkmnIH4n3lgLTr2Em7NSzCJRORYGlSJWxlaud546D+zNu5010eSwkx4u0dX/SRxD/2p+ QE9eSuxKbezGCulxMvzBb8A9r85+nX2OT58ZDxt2gp65bHsA3DQngPjciNXY= Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:e16:b0:694:857a:5a78 with SMTP id 006d021491bc7-698876f07f9mr1294157eaf.8.1777986510804; Tue, 05 May 2026 06:08:30 -0700 (PDT) Date: Tue, 05 May 2026 06:08:30 -0700 In-Reply-To: <6de5d329-9162-4992-85cb-f946f2d5c0b1@kernel.dk> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69f9ebce.170a0220.59368.0011.GAE@google.com> Subject: [syzbot ci] Re: io_uring/rsrc: remove registered buffer 1GB limit From: syzbot ci To: andres@anarazel.de, axboe@kernel.dk, io-uring@vger.kernel.org Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v1] io_uring/rsrc: remove registered buffer 1GB limit https://lore.kernel.org/all/6de5d329-9162-4992-85cb-f946f2d5c0b1@kernel.dk * [PATCH] io_uring/rsrc: remove registered buffer 1GB limit and found the following issue: WARNING in io_pin_pages Full report is available here: https://ci.syzbot.org/series/576c7f20-d7fb-471a-a534-f8f67489e049 *** WARNING in io_pin_pages tree: torvalds URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux base: c7e4e4d5f7dc2daa439303d1b5bf6bdfaa249f49 arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/287c9ce7-c085-4a41-9f94-756762f8dacf/config syz repro: https://ci.syzbot.org/findings/63ff94b0-aced-41c6-83fc-a917c57ad624/syz_repro ------------[ cut here ]------------ !(flags & __GFP_NOWARN) WARNING: mm/slub.c:6840 at __kvmalloc_node_noprof+0x7be/0x8a0 mm/slub.c:6840, CPU#1: syz.1.18/5830 Modules linked in: CPU: 1 UID: 0 PID: 5830 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:__kvmalloc_node_noprof+0x7be/0x8a0 mm/slub.c:6840 Code: ff 48 c7 c7 d0 bd a8 8e 48 89 de e8 dc 48 c9 02 e9 49 fc ff ff 48 c7 c7 10 be a8 8e 48 89 de e8 c8 48 c9 02 e9 7e fc ff ff 90 <0f> 0b 90 45 31 e4 e9 f8 fd ff ff 90 0f 0b 90 e9 52 ff ff ff 49 83 RSP: 0018:ffffc90003a37928 EFLAGS: 00010246 RAX: 0000000000000004 RBX: 0000000201000008 RCX: 0000000080000001 RDX: 0000000201000008 RSI: ffffffff8c28ac40 RDI: ffffffff8c28ac00 RBP: ffffc90003a37b70 R08: 00000000004028c0 R09: 00000000ffffffff R10: 0000000000000006 R11: 0000000000000000 R12: 0000000000000000 R13: 00000000004028c0 R14: 0000000000000016 R15: 00000000ffffffff FS: 00007fb3823ec6c0(0000) GS:ffff8882a9290000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcca0efe68 CR3: 000000017064e000 CR4: 00000000000006f0 Call Trace: io_pin_pages+0xac/0x1a0 io_uring/memmap.c:59 io_sqe_buffer_register+0x228/0x1860 io_uring/rsrc.c:801 io_sqe_buffers_register+0x2f9/0x7e0 io_uring/rsrc.c:913 io_register_rsrc+0x24d/0x280 io_uring/rsrc.c:414 __io_uring_register io_uring/register.c:843 [inline] __do_sys_io_uring_register io_uring/register.c:1029 [inline] __se_sys_io_uring_register+0xc5d/0x1ac0 io_uring/register.c:1006 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb38159cdd9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb3823ec028 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab RAX: ffffffffffffffda RBX: 00007fb381815fa0 RCX: 00007fb38159cdd9 RDX: 0000200000002700 RSI: 000000000000000f RDI: 0000000000000003 RBP: 00007fb381632d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb381816038 R14: 00007fb381815fa0 R15: 00007fffdb4e7d78 *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. To test a patch for this bug, please reply with `#syz test` (should be on a separate line). The patch should be attached to the email. Note: arguments like custom git repos and branches are not supported.