From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 E3B64211499 for ; Tue, 18 Feb 2025 17:38:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739900285; cv=none; b=b0OavF7xJCTlpU7N34r9tsAc/OLrizPdonqBm9XvMf/JIhsQu8l9xPgn8nI/25MsLadFsKKQnN76iL8n0pGQuMElBiFBzWGrST8vqPjk9RtT3gtxQGHeS+NalJ3YuG4sn95GGsgd1FHZudg7slUGtwwriGrQDb5nP/qVLDZvZOk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739900285; c=relaxed/simple; bh=brv5k9wqh0z9ruqPtExG1VpG0i06cRYDDw3D3oXEcxQ=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=URbc8LlYB+QrhnwKJsu1qt7klMm7PMO2PzqoMYQSwhTjQN6CH+hwkoNUqcaWNbRazCM2J4YNV4/0J4PtwFj96uAjicLipQayVsTY1K/ZArhnJj+ALxCPfReZYj3zq2PnyBQgyqvp/KRSkVDzbva5u3XuZSw1TeFGvake0OXlk90= 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=209.85.166.200 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-f200.google.com with SMTP id e9e14a558f8ab-3d197cf2ec9so39326045ab.3 for ; Tue, 18 Feb 2025 09:38:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739900283; x=1740505083; 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=8PtRNiZHbqqmIrhN/td9hLdsB8qso2d1u1U24dsYNOQ=; b=LbBaT9Si695USEmipcPio/YSich9nE0AT1Pqkongvlk0kGDvtfv7IEqKH3KkrjrxH/ 7IdIgbNz8RTbZQX50rXKbTmDkDjOD0RPngLaStLo6xHL27j1fdzffQD+uEmA8xPogoSL WOrcAS6NCo4o9bap+wdX0how+5CT8IO10pgPWJMs8D2Ry7ShQuRZtkjvfZMn5148oLOo McVshjKiyqMTVptUPWI22ijtlPF2XqDvfA/uxg4feAU9wgWP+0wdO6U51vOUncZZri3m OAZijMkeqabLFkuQTZnWE0wxurQ9jy6JTAtFsqIEYPQ41/pTlizT8tjsIN9ACde4hCSV eEGw== X-Gm-Message-State: AOJu0YyJk4LBmIMwrnSDZnt4nTStWm2rwRRQ5djwoea7F7XOMAurNGRL 4qtOdaeI3++dSm+/InBc7DnL7g1XRWKVekG7ovKsf0pwjUdiijG0+Vj38bGHqyOc1ctZ8f1Bp8p 7emuiEOPpIP3uXx86e041DqPLDXIRaI9I/f9zeEzmqoZGMSXkrudrDZ8= X-Google-Smtp-Source: AGHT+IF/EnaaC0DZxRrdp73/8FfsGpd3qRvO55EPDG9ir/0UweOfj1SYeeeqgC10s/o5f8mN4D9ZCCkKrqxnt6XH6mEqNdzT8LeX Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:b4d:b0:3d0:27f5:1b6c with SMTP id e9e14a558f8ab-3d2808d6429mr101570115ab.14.1739900282161; Tue, 18 Feb 2025 09:38:02 -0800 (PST) Date: Tue, 18 Feb 2025 09:38:02 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67b4c57a.050a0220.14d86d.0009.GAE@google.com> Subject: Re: [syzbot] [mm?] [bcachefs?] WARNING in lock_list_lru_of_memcg From: syzbot To: linux-kernel@vger.kernel.org, mmpgouride@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: BUG: unable to handle kernel NULL pointer dereference in qlist_free_all BUG: kernel NULL pointer dereference, address: 0000000000000008 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 3f9de067 P4D 3f9de067 PUD 40014067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5357 Comm: kworker/0:3 Not tainted 6.14.0-rc3-syzkaller-g2408a807bfc3-dirty #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: events nsim_fib_event_work RIP: 0010:qlink_to_cache mm/kasan/quarantine.c:131 [inline] RIP: 0010:qlist_free_all+0x69/0x140 mm/kasan/quarantine.c:176 Code: e8 06 48 83 e0 c0 49 8b 4c 05 08 f6 c1 01 0f 85 a8 00 00 00 4c 01 e8 66 90 0f b6 48 33 c1 e1 18 81 f9 00 00 00 f5 48 0f 45 c5 <48> 8b 58 08 4d 8b 34 24 48 63 83 c0 00 00 00 49 29 c4 48 89 df 4c RSP: 0018:ffffc9000d477568 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000ff000000 RDX: 0000000000000000 RSI: 0000000013ec5780 RDI: 000000001fffffff RBP: 0000000000000000 R08: ffffffff816eac95 R09: ffffffff82290c0f R10: dffffc0000000000 R11: fffffbfff28a8d0f R12: ffffffff93ec5780 R13: ffffea0000000000 R14: ffffffff93ec5780 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 00000000365b0000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] __kmalloc_cache_noprof+0x1d9/0x390 mm/slub.c:4320 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] nsim_fib4_rt_create drivers/net/netdevsim/fib.c:280 [inline] nsim_fib4_rt_insert drivers/net/netdevsim/fib.c:426 [inline] nsim_fib4_event drivers/net/netdevsim/fib.c:464 [inline] nsim_fib_event drivers/net/netdevsim/fib.c:884 [inline] nsim_fib_event_work+0xe02/0x3f00 drivers/net/netdevsim/fib.c:1493 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317 worker_thread+0x870/0xd30 kernel/workqueue.c:3398 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Modules linked in: CR2: 0000000000000008 ---[ end trace 0000000000000000 ]--- RIP: 0010:qlink_to_cache mm/kasan/quarantine.c:131 [inline] RIP: 0010:qlist_free_all+0x69/0x140 mm/kasan/quarantine.c:176 Code: e8 06 48 83 e0 c0 49 8b 4c 05 08 f6 c1 01 0f 85 a8 00 00 00 4c 01 e8 66 90 0f b6 48 33 c1 e1 18 81 f9 00 00 00 f5 48 0f 45 c5 <48> 8b 58 08 4d 8b 34 24 48 63 83 c0 00 00 00 49 29 c4 48 89 df 4c RSP: 0018:ffffc9000d477568 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000ff000000 RDX: 0000000000000000 RSI: 0000000013ec5780 RDI: 000000001fffffff RBP: 0000000000000000 R08: ffffffff816eac95 R09: ffffffff82290c0f R10: dffffc0000000000 R11: fffffbfff28a8d0f R12: ffffffff93ec5780 R13: ffffea0000000000 R14: ffffffff93ec5780 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 00000000365b0000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e8 06 48 83 e0 call 0xe083480b 5: c0 49 8b 4c rorb $0x4c,-0x75(%rcx) 9: 05 08 f6 c1 01 add $0x1c1f608,%eax e: 0f 85 a8 00 00 00 jne 0xbc 14: 4c 01 e8 add %r13,%rax 17: 66 90 xchg %ax,%ax 19: 0f b6 48 33 movzbl 0x33(%rax),%ecx 1d: c1 e1 18 shl $0x18,%ecx 20: 81 f9 00 00 00 f5 cmp $0xf5000000,%ecx 26: 48 0f 45 c5 cmovne %rbp,%rax * 2a: 48 8b 58 08 mov 0x8(%rax),%rbx <-- trapping instruction 2e: 4d 8b 34 24 mov (%r12),%r14 32: 48 63 83 c0 00 00 00 movslq 0xc0(%rbx),%rax 39: 49 29 c4 sub %rax,%r12 3c: 48 89 df mov %rbx,%rdi 3f: 4c rex.WR Tested on: commit: 2408a807 Merge tag 'vfs-6.14-rc4.fixes' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=113477df980000 kernel config: https://syzkaller.appspot.com/x/.config?x=b7bde34acd8f53b1 dashboard link: https://syzkaller.appspot.com/bug?extid=38a0cbd267eff2d286ff compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=114603a4580000