From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f79.google.com (mail-io1-f79.google.com [209.85.166.79]) (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 EA042168C4 for ; Wed, 5 Jun 2024 18:01:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717610494; cv=none; b=QgSmZWZaOcfRYPgqFv9nsCZVJEIsF5YDMrPfGF3Eq3HcLbqZCRdyBPnMN9kK+lSi0A8vUXePj3UU3fMcwciMSG1fD4AqZnvRpM1lvyQQRotQc6TpLvL/BbvQa9dfJXReBeMYCTiSXhxZlKUGuDrBSMAGuEwP6bDYEJBLNPgXdMk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717610494; c=relaxed/simple; bh=AhS5EzMEpZW4dc+BnuGeZl1BkoHsadluS8Ad7Tbugxs=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=tmN94l5sVJb7hr0R9d0eEW5r3iNZUwtuN2zHOioPZzgj+rsag73L690QJZLd6YwDUTSx8G6+YJaoMPgoa0FoByBlTc71+uqvbEQ8m1xc0DHXjSsv/wgK4HdtKSf7bOf03TAtxApgcYDuz+Oth3pV9j4kZlWzwBvtkwI96wAiPI4= 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=209.85.166.79 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-io1-f79.google.com with SMTP id ca18e2360f4ac-7eb43d50fdcso10603639f.2 for ; Wed, 05 Jun 2024 11:01:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1717610492; x=1718215292; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=FcjNq4EyJK72cVmrRnOIMPkrwFEsKP6VPHiyNXVXjOw=; b=hAXoeEWdntQwACMRi2sOsaBKBe8vm0rPbnQmGNRlzD5gu/lmJyT4uxNvBwMgsoh5eL VQkMtuBkDd5YjDXDV+QrVsMGCGayWtB/KNhSFz3SxORvDf0xgt4F4E93kJ0nyN2ngyWl kO/lceSSrvWbGUl1BqwqVEdvJBehGWTRc9kAJ2Kfiy67aon66SvJH7lAZGhdqBxOWUwP uisWeGfZcfpFI2cOn0pRQpWJ7L3pFPjgd76uJsB07G2ZIbH46rutSRyobsIor5w1JVsi hZaNKgpP5ikxMGE8j5eft70CMTWncWJI7HwC9803YaZCwG5a8F+8LxfYOPHVj4dgQm++ fHJg== X-Forwarded-Encrypted: i=1; AJvYcCX5y8o38JWR7gvrpod1OvLhSMMVHruL72wsxsdT/hjDl780W2wj5Hv5CV+K3E0QvatwPTj9/5NABdzRJM68HTDDhbP2BpsfYv5dUNc= X-Gm-Message-State: AOJu0YwBcriJ0d2zEX/MTmNGvI9a0JLJeuEqN5NO7vRyDejOwdtSTBQo S8+K3/XcYJID3LGiOZn8QygL5cH/5twVGpmx/HSf0T1qeEdEC9ntwxPORZwvENA31BQc0uyjIaO CDO1qLRptSddRPANlNs7d4gAJSyhDufsieMv5nQ+1+akAQCVLhQBHZDI= X-Google-Smtp-Source: AGHT+IEhZXpXBPsc2jpwuqxeJ85wy20d84rh23oOcZN9sseuWOHr9aZJZohQcK6QHFb4eWMcs4+lVhpzWzL8cGx4kxznIOLtMOHK Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c26b:0:b0:36c:5228:462 with SMTP id e9e14a558f8ab-374b1f56c81mr2061885ab.3.1717610492101; Wed, 05 Jun 2024 11:01:32 -0700 (PDT) Date: Wed, 05 Jun 2024 11:01:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003e9581061a285b4c@google.com> Subject: [syzbot] [btrfs?] general protection fault in detach_extent_buffer_folio From: syzbot To: clm@fb.com, dsterba@suse.com, josef@toxicpanda.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 71d7b52cc33b Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10a94aba980000 kernel config: https://syzkaller.appspot.com/x/.config?x=96fd46a1ee1615e0 dashboard link: https://syzkaller.appspot.com/bug?extid=f80b066392366b4af85e compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-71d7b52c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2083371f9b54/vmlinux-71d7b52c.xz kernel image: https://storage.googleapis.com/syzbot-assets/9f8b0934f579/bzImage-71d7b52c.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f80b066392366b4af85e@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc000000002a: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000150-0x0000000000000157] CPU: 0 PID: 111 Comm: kswapd0 Not tainted 6.10.0-rc2-syzkaller-00064-g71d7b52cc33b #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:__lock_acquire+0xe3e/0x3b30 kernel/locking/lockdep.c:5005 Code: 11 00 00 39 05 93 86 1f 12 0f 82 be 05 00 00 ba 01 00 00 00 e9 e4 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 82 1f 00 00 49 81 3c 24 e0 fd e2 92 0f 84 98 f2 RSP: 0018:ffffc90001f96f10 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 000000000000002a RSI: ffff888019192440 RDI: 0000000000000150 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff8fe2c157 R11: 0000000000000002 R12: 0000000000000150 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802c000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020202018 CR3: 000000001d6ac000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] detach_extent_buffer_folio+0x33c/0x870 fs/btrfs/extent_io.c:3385 btrfs_release_extent_buffer_pages+0xaa/0x1b0 fs/btrfs/extent_io.c:3446 release_extent_buffer+0x240/0x2c0 fs/btrfs/extent_io.c:4074 try_release_extent_buffer+0x78d/0x9e0 fs/btrfs/extent_io.c:5115 btree_release_folio+0xbf/0x100 fs/btrfs/disk-io.c:524 filemap_release_folio+0x1ed/0x280 mm/filemap.c:4173 shrink_folio_list+0x254a/0x4150 mm/vmscan.c:1394 evict_folios+0x6e6/0x1bf0 mm/vmscan.c:4553 try_to_shrink_lruvec+0x618/0x9b0 mm/vmscan.c:4749 shrink_one+0x3f8/0x7c0 mm/vmscan.c:4788 shrink_many mm/vmscan.c:4851 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4951 shrink_node mm/vmscan.c:5910 [inline] kswapd_shrink_node mm/vmscan.c:6720 [inline] balance_pgdat+0x1105/0x1970 mm/vmscan.c:6911 kswapd+0x5ea/0xbf0 mm/vmscan.c:7180 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0xe3e/0x3b30 kernel/locking/lockdep.c:5005 Code: 11 00 00 39 05 93 86 1f 12 0f 82 be 05 00 00 ba 01 00 00 00 e9 e4 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 82 1f 00 00 49 81 3c 24 e0 fd e2 92 0f 84 98 f2 RSP: 0018:ffffc90001f96f10 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 000000000000002a RSI: ffff888019192440 RDI: 0000000000000150 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff8fe2c157 R11: 0000000000000002 R12: 0000000000000150 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff88802c000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020202018 CR3: 000000001d6ac000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 11 00 adc %eax,(%rax) 2: 00 39 add %bh,(%rcx) 4: 05 93 86 1f 12 add $0x121f8693,%eax 9: 0f 82 be 05 00 00 jb 0x5cd f: ba 01 00 00 00 mov $0x1,%edx 14: e9 e4 00 00 00 jmp 0xfd 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 4c 89 e2 mov %r12,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 82 1f 00 00 jne 0x1fb6 34: 49 81 3c 24 e0 fd e2 cmpq $0xffffffff92e2fde0,(%r12) 3b: 92 3c: 0f .byte 0xf 3d: 84 .byte 0x84 3e: 98 cwtl 3f: f2 repnz --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup