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 5C2C61876 for ; Sun, 30 Mar 2025 10:04:26 +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=1743329068; cv=none; b=cKKeyPKxqJi5S0BJY1zFXPcWE2upE8lXk/yTwFuawqO26bidd9Rg9lXca5BMWFzXU2jvL750z/Dt+zC5rm0T7ldhkVWkG1d8tQcJrSgSftxhqw/4Fr6zO5ggturMxLlxZ/suujSTC08wxqjz9w/bzXI5wZ4R9t+CvDR17W+y1YA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743329068; c=relaxed/simple; bh=CKA/q8SUwicv45fZSYdr5M9GG+0Vb8WTCuH0zxxBMuw=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=qjWJeJiGd0/8tuQKP4czFvmYUHoNVeET5a1LXmZQgte0i6/WpL9NhB1kb/GCYTNE889JdybianhuOByn7T5tODQ0fwpQ2/9O1041yGDaacDRiSJ7mGHgkrp4UfTuhr4M1l/k9dVKBIMuCFQ20PKiuBi9eyASDAHMwi8IqqR88VI= 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-84cdae60616so383130839f.3 for ; Sun, 30 Mar 2025 03:04:26 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1743329065; x=1743933865; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=R5DBVfHx8Lp9VK1V60rXQ7/31BcaR07XDIHKYhbjfz8=; b=cDZbch1YyKswCUGufiygLv30Bff5cUkMfQMfyTTrd362WlgG6t56K7iPPfzpmp0VB/ k4jyyvNt8VZEBkZAn6VGnyuF/ABesLjc3a0tjRGLUhIsyoPdUjX6x5KAu2SGtSoAJYsV rznMNPtcK0k5Ry8sUEq5CrKPj4ls3KbLlZoU5w+9RfeLJAQ3zP+Tyl1EGqkay/29Prje o42eyXu65L/mFVoNj+st4g1o4FImc4urw9+0N1/+LoONIaBnxxNrkfmi5A4xq1M2yojw YalpN42ybhxxuhhUopC59ikNOH7eCV1G9tt5euPSSHxxIAfKPJxaRZkiI+EcDnqjLQ4O 2mGQ== X-Forwarded-Encrypted: i=1; AJvYcCV0iQVKxhwzzA948yB4qqNm02p2VIJx4YsEB8xvfWWYKUqySJG4KkcQ0DXEyWCmRedKndcfOnkH4pfFj/A=@vger.kernel.org X-Gm-Message-State: AOJu0Yyhb6bWAgjVKbh4lsc59L8mrs+TbzZ6GtMz2tV081ys9SR1ttHn gaIfet/DG2q+UvAhx7P3bAiHGQEpGeqsBf+oIMeP/Uc5AUx3df06plRky+x6oTJ3FLlwyYYkEF7 Ue6pcSSr/SD1qmdbA3/pMJ7KuLGnNaxD43ZXgRfmXwr6DLMI81ay6kv8= X-Google-Smtp-Source: AGHT+IFA0YZNlTkL2dkGSagzsOgk+UJLV0BiH+e0f2bvPo+oPJeJVUwy4CSKPpnxG5VeWCURHH+dWhFbo1K11tSJgfBxnoVWC1HA Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3387:b0:3d0:443d:a5c3 with SMTP id e9e14a558f8ab-3d5e08f0fd1mr61192345ab.3.1743329065427; Sun, 30 Mar 2025 03:04:25 -0700 (PDT) Date: Sun, 30 Mar 2025 03:04:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67e91729.050a0220.1547ec.009e.GAE@google.com> Subject: [syzbot] [afs?] BUG: sleeping function called from invalid context in __do_fault From: syzbot To: dhowells@redhat.com, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org, marc.dionne@auristor.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 2df0c02dab82 x86 boot build: make git ignore stale 'tools'.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14b39804580000 kernel config: https://syzkaller.appspot.com/x/.config?x=235ad3ee10cb70e dashboard link: https://syzkaller.appspot.com/bug?extid=8245611446194a52150d compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-2df0c02d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ed59f8925c2f/vmlinux-2df0c02d.xz kernel image: https://storage.googleapis.com/syzbot-assets/0cb2f671427e/bzImage-2df0c02d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8245611446194a52150d@syzkaller.appspotmail.com tmpfs: Unknown parameter 'he' BUG: sleeping function called from invalid context at ./include/linux/pagemap.h:1163 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 13591, name: syz.4.2234 preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 4 locks held by syz.4.2234/13591: #0: ffff888059b53978 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x2a2/0x370 fs/file.c:1213 #1: ffff88805f558b88 (&type->i_mutex_dir_key#11){.+.+}-{4:4}, at: iterate_dir+0x18b/0xb40 fs/readdir.c:101 #2: ffffffff8e3be0c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #2: ffffffff8e3be0c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #2: ffffffff8e3be0c0 (rcu_read_lock){....}-{1:3}, at: afs_dynroot_readdir+0x619/0xf50 fs/afs/dynroot.c:351 #3: ffff88805fe66fe0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:209 [inline] #3: ffff88805fe66fe0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/memory.c:6237 [inline] #3: ffff88805fe66fe0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x35/0x6e0 mm/memory.c:6297 CPU: 1 UID: 0 PID: 13591 Comm: syz.4.2234 Not tainted 6.14.0-syzkaller-01103-g2df0c02dab82 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120 __might_resched+0x3c0/0x5e0 kernel/sched/core.c:8798 folio_lock include/linux/pagemap.h:1163 [inline] __do_fault+0x39b/0x490 mm/memory.c:5011 do_shared_fault mm/memory.c:5473 [inline] do_fault mm/memory.c:5547 [inline] do_pte_missing+0x1a6/0x3ea0 mm/memory.c:4059 handle_pte_fault mm/memory.c:5888 [inline] __handle_mm_fault+0x1043/0x2a50 mm/memory.c:6031 handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6200 do_user_addr_fault+0x7a9/0x1430 arch/x86/mm/fault.c:1388 handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:filldir+0x2b7/0x5f0 fs/readdir.c:292 Code: e8 3e 02 85 ff 0f 01 cb 0f ae e8 48 8b 04 24 49 89 47 08 e8 2b 02 85 ff 4c 8b 7c 24 30 48 8b 44 24 10 49 89 07 e8 19 02 85 ff <66> 45 89 6f 10 e8 0f 02 85 ff 49 63 f5 0f b6 7c 24 1c 48 89 34 24 RSP: 0018:ffffc900061f7c68 EFLAGS: 00050293 RAX: 0000000000000000 RBX: ffffc900061f7e80 RCX: ffffffff8235f3aa RDX: ffff888026960000 RSI: ffffffff8235f427 RDI: 0000000000000006 RBP: 0000200000002008 R08: 0000000000000006 R09: 0000200000001fd8 R10: 0000200000002008 R11: 0000000000000000 R12: 0000000000000003 R13: 0000000000000018 R14: ffff888104a78b21 R15: 0000200000001ff0 dir_emit include/linux/fs.h:3853 [inline] afs_dynroot_readdir_cells fs/afs/dynroot.c:310 [inline] afs_dynroot_readdir+0x9bb/0xf50 fs/afs/dynroot.c:352 iterate_dir+0x293/0xb40 fs/readdir.c:108 __do_sys_getdents fs/readdir.c:322 [inline] __se_sys_getdents fs/readdir.c:308 [inline] __x64_sys_getdents+0x14d/0x2c0 fs/readdir.c:308 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff213d8d169 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:00007ff214c28038 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007ff213fa5fa0 RCX: 00007ff213d8d169 RDX: 00000000000000b8 RSI: 0000200000001fc0 RDI: 0000000000000008 RBP: 00007ff213e0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff213fa5fa0 R15: 00007fff179edc58 ============================= [ BUG: Invalid wait context ] 6.14.0-syzkaller-01103-g2df0c02dab82 #0 Tainted: G W ----------------------------- syz.4.2234/13591 is trying to lock: ffff888105efd338 (&fbdefio->lock){+.+.}-{4:4}, at: fb_deferred_io_track_page drivers/video/fbdev/core/fb_defio.c:187 [inline] ffff888105efd338 (&fbdefio->lock){+.+.}-{4:4}, at: fb_deferred_io_page_mkwrite drivers/video/fbdev/core/fb_defio.c:237 [inline] ffff888105efd338 (&fbdefio->lock){+.+.}-{4:4}, at: fb_deferred_io_mkwrite+0x110/0x980 drivers/video/fbdev/core/fb_defio.c:245 other info that might help us debug this: context-{5:5} 4 locks held by syz.4.2234/13591: #0: ffff888059b53978 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x2a2/0x370 fs/file.c:1213 #1: ffff88805f558b88 (&type->i_mutex_dir_key#11){.+.+}-{4:4}, at: iterate_dir+0x18b/0xb40 fs/readdir.c:101 #2: ffffffff8e3be0c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #2: ffffffff8e3be0c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #2: ffffffff8e3be0c0 (rcu_read_lock){....}-{1:3}, at: afs_dynroot_readdir+0x619/0xf50 fs/afs/dynroot.c:351 #3: ffff88805fe66fe0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:209 [inline] #3: ffff88805fe66fe0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/memory.c:6237 [inline] #3: ffff88805fe66fe0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x35/0x6e0 mm/memory.c:6297 stack backtrace: CPU: 1 UID: 0 PID: 13591 Comm: syz.4.2234 Tainted: G W 6.14.0-syzkaller-01103-g2df0c02dab82 #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_lock_invalid_wait_context kernel/locking/lockdep.c:4831 [inline] check_wait_context kernel/locking/lockdep.c:4903 [inline] __lock_acquire+0x3ff/0x1ba0 kernel/locking/lockdep.c:5185 lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __mutex_lock_common kernel/locking/mutex.c:587 [inline] __mutex_lock+0x19a/0xb00 kernel/locking/mutex.c:732 fb_deferred_io_track_page drivers/video/fbdev/core/fb_defio.c:187 [inline] fb_deferred_io_page_mkwrite drivers/video/fbdev/core/fb_defio.c:237 [inline] fb_deferred_io_mkwrite+0x110/0x980 drivers/video/fbdev/core/fb_defio.c:245 do_page_mkwrite+0x177/0x380 mm/memory.c:3256 do_shared_fault mm/memory.c:5485 [inline] do_fault mm/memory.c:5547 [inline] do_pte_missing+0x29c/0x3ea0 mm/memory.c:4059 handle_pte_fault mm/memory.c:5888 [inline] __handle_mm_fault+0x1043/0x2a50 mm/memory.c:6031 handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6200 do_user_addr_fault+0x7a9/0x1430 arch/x86/mm/fault.c:1388 handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:filldir+0x2b7/0x5f0 fs/readdir.c:292 Code: e8 3e 02 85 ff 0f 01 cb 0f ae e8 48 8b 04 24 49 89 47 08 e8 2b 02 85 ff 4c 8b 7c 24 30 48 8b 44 24 10 49 89 07 e8 19 02 85 ff <66> 45 89 6f 10 e8 0f 02 85 ff 49 63 f5 0f b6 7c 24 1c 48 89 34 24 RSP: 0018:ffffc900061f7c68 EFLAGS: 00050293 RAX: 0000000000000000 RBX: ffffc900061f7e80 RCX: ffffffff8235f3aa RDX: ffff888026960000 RSI: ffffffff8235f427 RDI: 0000000000000006 RBP: 0000200000002008 R08: 0000000000000006 R09: 0000200000001fd8 R10: 0000200000002008 R11: 0000000000000000 R12: 0000000000000003 R13: 0000000000000018 R14: ffff888104a78b21 R15: 0000200000001ff0 dir_emit include/linux/fs.h:3853 [inline] afs_dynroot_readdir_cells fs/afs/dynroot.c:310 [inline] afs_dynroot_readdir+0x9bb/0xf50 fs/afs/dynroot.c:352 iterate_dir+0x293/0xb40 fs/readdir.c:108 __do_sys_getdents fs/readdir.c:322 [inline] __se_sys_getdents fs/readdir.c:308 [inline] __x64_sys_getdents+0x14d/0x2c0 fs/readdir.c:308 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff213d8d169 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:00007ff214c28038 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007ff213fa5fa0 RCX: 00007ff213d8d169 RDX: 00000000000000b8 RSI: 0000200000001fc0 RDI: 0000000000000008 RBP: 00007ff213e0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff213fa5fa0 R15: 00007fff179edc58 ---------------- Code disassembly (best guess): 0: e8 3e 02 85 ff call 0xff850243 5: 0f 01 cb stac 8: 0f ae e8 lfence b: 48 8b 04 24 mov (%rsp),%rax f: 49 89 47 08 mov %rax,0x8(%r15) 13: e8 2b 02 85 ff call 0xff850243 18: 4c 8b 7c 24 30 mov 0x30(%rsp),%r15 1d: 48 8b 44 24 10 mov 0x10(%rsp),%rax 22: 49 89 07 mov %rax,(%r15) 25: e8 19 02 85 ff call 0xff850243 * 2a: 66 45 89 6f 10 mov %r13w,0x10(%r15) <-- trapping instruction 2f: e8 0f 02 85 ff call 0xff850243 34: 49 63 f5 movslq %r13d,%rsi 37: 0f b6 7c 24 1c movzbl 0x1c(%rsp),%edi 3c: 48 89 34 24 mov %rsi,(%rsp) --- 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