From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f206.google.com (mail-il1-f206.google.com [209.85.166.206]) (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 899B72AD02 for ; Mon, 17 Feb 2025 02:11:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739758281; cv=none; b=O80ZY+qEauDK9fNQZATIbJJZF8rtWLih9fiWXo782Ve1fBcRxOu8JANvWCse40ww+t8c19VC41so3lOYM9WItJRDAkjrr8Bi2qXM+9BrlWhMpnNLDTgKm9wAHFNRSUP3RZbt0cFWzcRJzKrYKD+gYRM2e9a9E14r2HehY6em8wM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739758281; c=relaxed/simple; bh=BQWhNkIkITDFgj+pqH98SJOgqDC0q9J2U4dt+CRbEKc=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=tbY+QGP6a2w9HMgYA1i7IXh6feETf+qHDAknGv/idnewRWIJhzbMXpSBjH2krgk6BmnUt+W0/PX3d7W3oWKZSA3JdwY9Y4+2/c8bZkk3VTXRkpvUMu48y2Ghxl/HtxkMtC4uqI9t1D0HvzPeoHkZn9UN6hz+qRSJ68EBfqWYFKI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.206 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f206.google.com with SMTP id e9e14a558f8ab-3d060cfe752so26176545ab.2 for ; Sun, 16 Feb 2025 18:11:19 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739758278; x=1740363078; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=fn9l4Yj5NFQ4838XD4RT4ed3t6Y0RF0aDBN+uxZBAIk=; b=LXOlXllJbbIhvrz5sNRJonbYdryqU8X7u+HgSdJPBuFIOoERfhc9YwdwQ6hasSiUom aJ0i5+S8787A+a8Zh7+z24T8hmXzLbrIEE6LOA86IrrhpnUq+Q+QB3kKFc2W/OQxdZ2C cDm2hJKu09et2HPKLNdw31+6HcGMy7uwcMpj0QfDbIYQ9wbJD7CqZmUPXMZsih8LkJ83 Bo+0GJLCv4VL6+TaNU+VyzOqchAvIMuGzcv+LfSHic+P0VmQ9QyzxN6l4V81pq0RyLtA vQvG631jHHJYRMEQoP7iO9cMeu59wDXEFunp7SRQ4SgbnF5qIuxeLnjDaR4V+dT3PGYX mdYA== X-Forwarded-Encrypted: i=1; AJvYcCX5WW8vYCkI910x4guC5UrKoCwkmLodcWZrHbxpnydsZxEoFiCqx+0ZljUX2YEWrNcr3Y9S6pcwyPiyRPTxlQ==@vger.kernel.org X-Gm-Message-State: AOJu0YzEXnP3pyR0q5jp0rjW3KIcdZ/yq6YGZ0jUkiY/y0s9FrkoQCT2 vndZOtZQUwIGS/An54TEEZdbafx8MBvgf5sNaStbfbMJepIaGNRlUnwuFWqY47VfEYBcw40DHqL A3CzGwflMFqQv4wbjpS5f+W9n6SmcYUA4Tfiwbneh9nSr2CIt6K06DTI= X-Google-Smtp-Source: AGHT+IHZ6EI9S2wtYp0GiaUFXrM3xQSW/nzb2cQVeB2B/sdih4KSnYuvS1pbnEZdhDj7A8Zil9QLmMTx4rALk6gKkTxgDYo2HQJ/ Precedence: bulk X-Mailing-List: linux-bcachefs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:170b:b0:3d0:235b:4810 with SMTP id e9e14a558f8ab-3d280764217mr52204345ab.2.1739758278649; Sun, 16 Feb 2025 18:11:18 -0800 (PST) Date: Sun, 16 Feb 2025 18:11:18 -0800 In-Reply-To: <679fb3a5.050a0220.163cdc.0030.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67b29ac6.050a0220.173698.001c.GAE@google.com> Subject: Re: [syzbot] [bcachefs] general protection fault in bioset_exit (2) From: syzbot To: axboe@kernel.dk, kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 224e74511041 Merge tag 'kbuild-fixes-v6.14-2' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=169b5bf8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e55cabe422b4fcaf dashboard link: https://syzkaller.appspot.com/bug?extid=76f13f2acac84df26aae 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=14e8b5a4580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1155a898580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6b4272577622/disk-224e7451.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ec492843be2b/vmlinux-224e7451.xz kernel image: https://storage.googleapis.com/syzbot-assets/013e7903deef/bzImage-224e7451.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/6b2a19ba3037/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+76f13f2acac84df26aae@syzkaller.appspotmail.com bcachefs (loop4): shutting down bcachefs (loop4): shutdown complete BUG: unable to handle page fault for address: 0000000000003906 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 5943 Comm: syz-executor233 Not tainted 6.14.0-rc2-syzkaller-00390-g224e74511041 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 RIP: 0010:qlist_move_cache+0x6a/0x140 mm/kasan/quarantine.c:302 Code: 00 00 00 00 48 8d 47 08 48 89 44 24 18 48 8d 47 10 48 89 44 24 10 48 8d 46 08 48 89 44 24 08 48 8d 46 10 48 89 04 24 4c 89 eb <4d> 8b 6d 00 48 89 df e8 7a 25 48 ff 48 c1 e8 06 48 83 e0 c0 48 8b RSP: 0000:ffffc900045bf7b0 EFLAGS: 00010006 RAX: 00000000000002c0 RBX: 0000000000003906 RCX: ffffffff9a680288 RDX: ffffffff9a680290 RSI: ffff888064500258 RDI: 0000000000000000 RBP: ffffea0000000000 R08: ffffffff816eac3c R09: fffff520008b7edc R10: dffffc0000000000 R11: fffff520008b7edc R12: ffffffff9a680280 R13: 0000000000003906 R14: ffffc900045bf808 R15: ffff88814cdb2500 FS: 00007fe4bd5596c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000003906 CR3: 0000000076ddc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kasan_quarantine_remove_cache+0x10b/0x180 mm/kasan/quarantine.c:370 kmem_cache_destroy+0x6e/0x160 mm/slab_common.c:528 bio_put_slab block/bio.c:155 [inline] bioset_exit+0x54e/0x650 block/bio.c:1662 bch2_fs_fs_io_direct_exit+0x19/0x30 fs/bcachefs/fs-io-direct.c:676 __bch2_fs_free fs/bcachefs/super.c:558 [inline] bch2_fs_release+0x1a9/0x7b0 fs/bcachefs/super.c:624 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x22f/0x480 lib/kobject.c:737 bch2_fs_get_tree+0xdee/0x17a0 fs/bcachefs/fs.c:2299 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3560 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe4bddb482a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 7e 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe4bd558fd8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fe4bd558ff0 RCX: 00007fe4bddb482a RDX: 00004000000058c0 RSI: 0000400000005900 RDI: 00007fe4bd558ff0 RBP: 0000400000005900 R08: 00007fe4bd559030 R09: 000000000000590c R10: 0000000000010000 R11: 0000000000000282 R12: 00004000000058c0 R13: 00007fe4bd559030 R14: 0000000000000003 R15: 0000000000010000 Modules linked in: CR2: 0000000000003906 ---[ end trace 0000000000000000 ]--- RIP: 0010:qlist_move_cache+0x6a/0x140 mm/kasan/quarantine.c:302 Code: 00 00 00 00 48 8d 47 08 48 89 44 24 18 48 8d 47 10 48 89 44 24 10 48 8d 46 08 48 89 44 24 08 48 8d 46 10 48 89 04 24 4c 89 eb <4d> 8b 6d 00 48 89 df e8 7a 25 48 ff 48 c1 e8 06 48 83 e0 c0 48 8b RSP: 0000:ffffc900045bf7b0 EFLAGS: 00010006 RAX: 00000000000002c0 RBX: 0000000000003906 RCX: ffffffff9a680288 RDX: ffffffff9a680290 RSI: ffff888064500258 RDI: 0000000000000000 RBP: ffffea0000000000 R08: ffffffff816eac3c R09: fffff520008b7edc R10: dffffc0000000000 R11: fffff520008b7edc R12: ffffffff9a680280 R13: 0000000000003906 R14: ffffc900045bf808 R15: ffff88814cdb2500 FS: 00007fe4bd5596c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000003906 CR3: 0000000076ddc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 48 8d 47 08 lea 0x8(%rdi),%rax 8: 48 89 44 24 18 mov %rax,0x18(%rsp) d: 48 8d 47 10 lea 0x10(%rdi),%rax 11: 48 89 44 24 10 mov %rax,0x10(%rsp) 16: 48 8d 46 08 lea 0x8(%rsi),%rax 1a: 48 89 44 24 08 mov %rax,0x8(%rsp) 1f: 48 8d 46 10 lea 0x10(%rsi),%rax 23: 48 89 04 24 mov %rax,(%rsp) 27: 4c 89 eb mov %r13,%rbx * 2a: 4d 8b 6d 00 mov 0x0(%r13),%r13 <-- trapping instruction 2e: 48 89 df mov %rbx,%rdi 31: e8 7a 25 48 ff call 0xff4825b0 36: 48 c1 e8 06 shr $0x6,%rax 3a: 48 83 e0 c0 and $0xffffffffffffffc0,%rax 3e: 48 rex.W 3f: 8b .byte 0x8b --- 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.