From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4A226217F36 for ; Sat, 16 Aug 2025 07:30:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755329429; cv=none; b=ObXRqU2V2CCIBe5ahGwtIN7BkKBeD8w9F+ZrNJRAdYrYNYODpAVctoLdOlxUH/XzNzH8T0kypb5HKvF2CZu+J52qZhEbF9uPuuNafu4JOeA7FpUG7N55wpzp3eSJPavmvgh1xA4lAs1zUm5Kkav+qIYM4YBxuhxW/WWR6CUe/FA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755329429; c=relaxed/simple; bh=X9j3eKFGq11QwM9nhg0P1onKwRN6+n6i+pPjJ26anLA=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; 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List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:156a:b0:3e5:50a5:a7ef with SMTP id e9e14a558f8ab-3e57e9c1042mr93799305ab.15.1755329426533; Sat, 16 Aug 2025 00:30:26 -0700 (PDT) Date: Sat, 16 Aug 2025 00:30:26 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68a03392.050a0220.e29e5.0041.GAE@google.com> Subject: [syzbot ci] Re: io_uring: add request poisoning From: syzbot ci To: asml.silence@gmail.com, 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: add request poisoning https://lore.kernel.org/all/b98edbb8ec4495b053dfb11cb3588f17f5253b6e.1755182071.git.asml.silence@gmail.com * [PATCH 1/1] io_uring: add request poisoning and found the following issue: general protection fault in __io_queue_proc Full report is available here: https://ci.syzbot.org/series/f67750f7-0bd0-41d6-a3eb-d1b77b2c9728 *** general protection fault in __io_queue_proc tree: torvalds URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux base: dfc0f6373094dd88e1eaf76c44f2ff01b65db851 arch: amd64 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 config: https://ci.syzbot.org/builds/e0a322a6-324d-4dcd-a2dc-b6ec3bfb0f54/config C repro: https://ci.syzbot.org/findings/c93b97f2-efb3-45d6-a6ca-0afeb7311b74/c_repro syz repro: https://ci.syzbot.org/findings/c93b97f2-efb3-45d6-a6ca-0afeb7311b74/syz_repro Oops: general protection fault, probably for non-canonical address 0xfbd59c0000000213: 0000 [#1] SMP KASAN PTI KASAN: maybe wild-memory-access in range [0xdead000000001098-0xdead00000000109f] CPU: 0 UID: 0 PID: 5985 Comm: syz.0.17 Not tainted 6.17.0-rc1-syzkaller-00036-gdfc0f6373094-dirty #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:__io_queue_proc+0x1b8/0x4d0 io_uring/poll.c:475 Code: c1 e8 03 48 89 44 24 20 80 3c 18 00 74 08 4c 89 ef e8 8c 27 63 fd 4d 8b 6d 00 4d 85 ed 74 5a 49 83 c5 08 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ef e8 6a 27 63 fd 48 8b 44 24 18 49 39 45 RSP: 0018:ffffc9000295f760 EFLAGS: 00010a02 RAX: 1bd5a00000000213 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffff888020cd9cc0 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000295f900 R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6 R10: dffffc0000000000 R11: ffffffff84bfdf40 R12: ffff888028da6000 R13: dead000000001099 R14: ffffc9000295f918 R15: 1ffff9200052bf23 FS: 000055558fd42500(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30d63fff CR3: 000000010e6dc000 CR4: 00000000000006f0 Call Trace: poll_wait include/linux/poll.h:45 [inline] n_tty_poll+0x9d/0x740 drivers/tty/n_tty.c:2451 tty_poll+0xbe/0x160 drivers/tty/tty_io.c:2199 vfs_poll include/linux/poll.h:82 [inline] __io_arm_poll_handler+0x372/0xbb0 io_uring/poll.c:581 io_poll_add+0xcd/0x1f0 io_uring/poll.c:901 __io_issue_sqe+0x181/0x4b0 io_uring/io_uring.c:1795 io_issue_sqe+0x165/0xfd0 io_uring/io_uring.c:1818 io_queue_sqe io_uring/io_uring.c:2047 [inline] io_submit_sqe io_uring/io_uring.c:2306 [inline] io_submit_sqes+0xa32/0x1e60 io_uring/io_uring.c:2419 __do_sys_io_uring_enter io_uring/io_uring.c:3487 [inline] __se_sys_io_uring_enter+0x2df/0x2b20 io_uring/io_uring.c:3421 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f750a18ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc8b53b938 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f750a3b5fa0 RCX: 00007f750a18ebe9 RDX: 0000000000000000 RSI: 0000000000000a3d RDI: 0000000000000004 RBP: 00007f750a211e19 R08: 0000000000000000 R09: 000000000000ff39 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f750a3b5fa0 R14: 00007f750a3b5fa0 R15: 0000000000000006 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__io_queue_proc+0x1b8/0x4d0 io_uring/poll.c:475 Code: c1 e8 03 48 89 44 24 20 80 3c 18 00 74 08 4c 89 ef e8 8c 27 63 fd 4d 8b 6d 00 4d 85 ed 74 5a 49 83 c5 08 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ef e8 6a 27 63 fd 48 8b 44 24 18 49 39 45 RSP: 0018:ffffc9000295f760 EFLAGS: 00010a02 RAX: 1bd5a00000000213 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffff888020cd9cc0 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000295f900 R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6 R10: dffffc0000000000 R11: ffffffff84bfdf40 R12: ffff888028da6000 R13: dead000000001099 R14: ffffc9000295f918 R15: 1ffff9200052bf23 FS: 000055558fd42500(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30d63fff CR3: 000000010e6dc000 CR4: 00000000000006f0 ---------------- Code disassembly (best guess): 0: c1 e8 03 shr $0x3,%eax 3: 48 89 44 24 20 mov %rax,0x20(%rsp) 8: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) c: 74 08 je 0x16 e: 4c 89 ef mov %r13,%rdi 11: e8 8c 27 63 fd call 0xfd6327a2 16: 4d 8b 6d 00 mov 0x0(%r13),%r13 1a: 4d 85 ed test %r13,%r13 1d: 74 5a je 0x79 1f: 49 83 c5 08 add $0x8,%r13 23: 4c 89 e8 mov %r13,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 ef mov %r13,%rdi 33: e8 6a 27 63 fd call 0xfd6327a2 38: 48 8b 44 24 18 mov 0x18(%rsp),%rax 3d: 49 rex.WB 3e: 39 .byte 0x39 3f: 45 rex.RB *** 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.