From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f207.google.com (mail-il1-f207.google.com [209.85.166.207]) (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 BBF3E156257 for ; Fri, 27 Dec 2024 12:59:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735304365; cv=none; b=PvY6+aqDg73OYbjjhci2NlrJvMKRZtDgQDEr9fyFjPMBOPT+3ym/W5w9Z1HdRgxEm1S8ps5W2ue4PKjrKve+iUklT80sX742vV8yS4XQgMQCrGl9aQy066QU71LBdGl481IVWinl97p+Q9euQ3aWHOuca4vnZv24eJtUOdd05wY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735304365; c=relaxed/simple; bh=AR3y6Nl3zakCDb7gDK5qWc0UEme/uYCzwZ2EyASZyRQ=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=ZVQD0AueTo0KJHuS42qNw7cWvJk98j7cMy5v9CxyQKS1teCSNrP+3eACdYRpsGLjfl5Dabszbcic9tjIMq7IdF2K5SJJreao12GyCCMH6YTPRIKEKmv0qmmTO3dvTBvXvmD8mQ80Z16nySNxat5nMnbriSSmyxyWbnHvvEiguuw= 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=209.85.166.207 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-f207.google.com with SMTP id e9e14a558f8ab-3ae31bb8ee3so150358665ab.3 for ; Fri, 27 Dec 2024 04:59:23 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1735304363; x=1735909163; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=HkDSwakMmPRhZPaI+bLPuSfyf9ocsLibQE9FfU30XMY=; b=OLdEFL2GaIUT/4M1DkpeqQYz8j8qE+aGE1SWvifDcCYJ3lNTjR1VeekGRYRDpxZWzM EF6IEcWclno9T9ztij0kv79OXk6aK5lSj8k9hnRDOAs3FpcFHHnYh3yNlLbE5q3iVmjQ hOs22EAHM4h16zxnuAe7zRg5lxfledHGojZDmav1Hq9jS53dZZDQj95ONUY5KBspGXgZ iR0xE5upGEj/OxRc0ZdSIuMwQ5nlTCmYgSCqoKbQojwCDhWnT29xt3T5RwS3th9Lpzky ezfz7r6mXSviXwmXgbajM97lUBhXx2W9eDMW6A1I10oqbhOsOKeE0wmHs7E+Od8eijdd LSrw== X-Forwarded-Encrypted: i=1; AJvYcCUE8/Zy2I4JAqlkH1D6/6VqqazEneCtHOfs0r9jKCMkHV48S/zIJhhOvEtG9FmoqoFTQxXvh3QIUJXoIso=@vger.kernel.org X-Gm-Message-State: AOJu0YzUkmaQ2sxwDNjRNF54XvdNeZEBSOZcE5XmEhWEFDY8V2uam8rA 1LvO2CvzDWBTmhyYh/LUBnHIIcR0+nA924ecSfvutSSG5IRWEqtgVRniKZc++Y0IxGH8KRZe645 1cF+puXiNWka3F1P/pa3l6PDsWB23GnStMC/zj2upvvX4qQpjxG1X2E0= X-Google-Smtp-Source: AGHT+IEYpTbf4HesOpQorZdgYm03vBWD4fAwEG/ZygRY93qcXhHxwf8dc9w7ZH0yjb9QGlY9Z/cm+/HMMaKRpLQBzvJJNRRKiDCK Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1c2b:b0:3a7:7ded:5219 with SMTP id e9e14a558f8ab-3c2d59193b5mr202993455ab.21.1735304362882; Fri, 27 Dec 2024 04:59:22 -0800 (PST) Date: Fri, 27 Dec 2024 04:59:22 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <676ea4aa.050a0220.2f3838.0483.GAE@google.com> Subject: [syzbot] [net?] possible deadlock in vm_insert_page From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, willemdebruijn.kernel@gmail.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 573067a5a685 Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=149fdfe8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=cd7202b56d469648 dashboard link: https://syzkaller.appspot.com/bug?extid=11701838dd42428ab7b3 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/9d3b5c855aa0/disk-573067a5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0c06fc1ead83/vmlinux-573067a5.xz kernel image: https://storage.googleapis.com/syzbot-assets/3390e59b9e4b/Image-573067a5.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+11701838dd42428ab7b3@syzkaller.appspotmail.com ====================================================== WARNING: possible circular locking dependency detected 6.13.0-rc3-syzkaller-g573067a5a685 #0 Not tainted ------------------------------------------------------ syz.8.396/8273 is trying to acquire lock: ffff0000d0caa9b8 (&vma->vm_lock->lock){++++}-{4:4}, at: vma_start_write include/linux/mm.h:769 [inline] ffff0000d0caa9b8 (&vma->vm_lock->lock){++++}-{4:4}, at: vm_flags_set include/linux/mm.h:899 [inline] ffff0000d0caa9b8 (&vma->vm_lock->lock){++++}-{4:4}, at: vm_insert_page+0x2a0/0xab0 mm/memory.c:2241 but task is already holding lock: ffff0000d4aa2868 (&po->pg_vec_lock){+.+.}-{4:4}, at: packet_mmap+0x9c/0x4c8 net/packet/af_packet.c:4650 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #10 (&po->pg_vec_lock){+.+.}-{4:4}: __mutex_lock_common+0x218/0x28f4 kernel/locking/mutex.c:585 __mutex_lock kernel/locking/mutex.c:735 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:787 packet_mmap+0x9c/0x4c8 net/packet/af_packet.c:4650 sock_mmap+0x90/0xa8 net/socket.c:1403 call_mmap include/linux/fs.h:2183 [inline] mmap_file mm/internal.h:124 [inline] __mmap_new_file_vma mm/vma.c:2291 [inline] __mmap_new_vma mm/vma.c:2355 [inline] __mmap_region+0x1854/0x2180 mm/vma.c:2456 mmap_region+0x1f4/0x370 mm/mmap.c:1348 do_mmap+0x8b0/0xfd0 mm/mmap.c:496 vm_mmap_pgoff+0x1a0/0x38c mm/util.c:580 ksys_mmap_pgoff+0x3a4/0x5c8 mm/mmap.c:542 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #9 (&mm->mmap_lock){++++}-{4:4}: __might_fault+0xc4/0x124 mm/memory.c:6751 drm_mode_object_get_properties+0x208/0x540 drivers/gpu/drm/drm_mode_object.c:407 drm_mode_obj_get_properties_ioctl+0x2bc/0x4fc drivers/gpu/drm/drm_mode_object.c:459 drm_ioctl_kernel+0x26c/0x368 drivers/gpu/drm/drm_ioctl.c:796 drm_ioctl+0x624/0xb14 drivers/gpu/drm/drm_ioctl.c:893 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __arm64_sys_ioctl+0x14c/0x1cc fs/ioctl.c:892 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #8 (crtc_ww_class_mutex){+.+.}-{4:4}: ww_acquire_init include/linux/ww_mutex.h:162 [inline] drm_modeset_acquire_init+0x1e4/0x384 drivers/gpu/drm/drm_modeset_lock.c:250 drmm_mode_config_init+0xb98/0x130c drivers/gpu/drm/drm_mode_config.c:453 vkms_modeset_init drivers/gpu/drm/vkms/vkms_drv.c:158 [inline] vkms_create drivers/gpu/drm/vkms/vkms_drv.c:219 [inline] vkms_init+0x2fc/0x600 drivers/gpu/drm/vkms/vkms_drv.c:256 do_one_initcall+0x254/0x9f8 init/main.c:1266 do_initcall_level+0x154/0x214 init/main.c:1328 do_initcalls+0x58/0xac init/main.c:1344 do_basic_setup+0x8c/0xa0 init/main.c:1363 kernel_init_freeable+0x324/0x478 init/main.c:1577 kernel_init+0x24/0x2a0 init/main.c:1466 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 -> #7 (crtc_ww_class_acquire){+.+.}-{0:0}: ww_acquire_init include/linux/ww_mutex.h:161 [inline] drm_modeset_acquire_init+0x1c4/0x384 drivers/gpu/drm/drm_modeset_lock.c:250 drm_client_modeset_commit_atomic+0xd8/0x724 drivers/gpu/drm/drm_client_modeset.c:1009 drm_client_modeset_commit_locked+0xd0/0x4a8 drivers/gpu/drm/drm_client_modeset.c:1173 drm_client_modeset_commit+0x50/0x7c drivers/gpu/drm/drm_client_modeset.c:1199 __drm_fb_helper_restore_fbdev_mode_unlocked+0xd4/0x178 drivers/gpu/drm/drm_fb_helper.c:237 drm_fb_helper_set_par+0xc4/0x110 drivers/gpu/drm/drm_fb_helper.c:1351 fbcon_init+0xf34/0x1eb8 drivers/video/fbdev/core/fbcon.c:1113 visual_init+0x27c/0x548 drivers/tty/vt/vt.c:1011 do_bind_con_driver+0x7dc/0xe04 drivers/tty/vt/vt.c:3833 do_take_over_console+0x4ac/0x5f0 drivers/tty/vt/vt.c:4399 do_fbcon_takeover+0x158/0x260 drivers/video/fbdev/core/fbcon.c:549 do_fb_registered drivers/video/fbdev/core/fbcon.c:2988 [inline] fbcon_fb_registered+0x370/0x4ec drivers/video/fbdev/core/fbcon.c:3008 do_register_framebuffer drivers/video/fbdev/core/fbmem.c:449 [inline] register_framebuffer+0x470/0x610 drivers/video/fbdev/core/fbmem.c:515 __drm_fb_helper_initial_config_and_unlock+0x137c/0x1910 drivers/gpu/drm/drm_fb_helper.c:1841 drm_fb_helper_initial_config+0x48/0x64 drivers/gpu/drm/drm_fb_helper.c:1906 drm_fbdev_client_hotplug+0x158/0x22c drivers/gpu/drm/drm_fbdev_client.c:51 drm_client_register+0x144/0x1e0 drivers/gpu/drm/drm_client.c:140 drm_fbdev_client_setup+0x1a4/0x39c drivers/gpu/drm/drm_fbdev_client.c:158 drm_client_setup+0x28/0x9c drivers/gpu/drm/drm_client_setup.c:29 vkms_create drivers/gpu/drm/vkms/vkms_drv.c:230 [inline] vkms_init+0x4f0/0x600 drivers/gpu/drm/vkms/vkms_drv.c:256 do_one_initcall+0x254/0x9f8 init/main.c:1266 do_initcall_level+0x154/0x214 init/main.c:1328 do_initcalls+0x58/0xac init/main.c:1344 do_basic_setup+0x8c/0xa0 init/main.c:1363 kernel_init_freeable+0x324/0x478 init/main.c:1577 kernel_init+0x24/0x2a0 init/main.c:1466 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 -> #6 (&client->modeset_mutex){+.+.}-{4:4}: __mutex_lock_common+0x218/0x28f4 kernel/locking/mutex.c:585 __mutex_lock kernel/locking/mutex.c:735 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:787 drm_client_modeset_probe+0x304/0x3f64 drivers/gpu/drm/drm_client_modeset.c:834 __drm_fb_helper_initial_config_and_unlock+0x104/0x1910 drivers/gpu/drm/drm_fb_helper.c:1818 drm_fb_helper_initial_config+0x48/0x64 drivers/gpu/drm/drm_fb_helper.c:1906 drm_fbdev_client_hotplug+0x158/0x22c drivers/gpu/drm/drm_fbdev_client.c:51 drm_client_register+0x144/0x1e0 drivers/gpu/drm/drm_client.c:140 drm_fbdev_client_setup+0x1a4/0x39c drivers/gpu/drm/drm_fbdev_client.c:158 drm_client_setup+0x28/0x9c drivers/gpu/drm/drm_client_setup.c:29 vkms_create drivers/gpu/drm/vkms/vkms_drv.c:230 [inline] vkms_init+0x4f0/0x600 drivers/gpu/drm/vkms/vkms_drv.c:256 do_one_initcall+0x254/0x9f8 init/main.c:1266 do_initcall_level+0x154/0x214 init/main.c:1328 do_initcalls+0x58/0xac init/main.c:1344 do_basic_setup+0x8c/0xa0 init/main.c:1363 kernel_init_freeable+0x324/0x478 init/main.c:1577 kernel_init+0x24/0x2a0 init/main.c:1466 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 -> #5 (&helper->lock){+.+.}-{4:4}: __mutex_lock_common+0x218/0x28f4 kernel/locking/mutex.c:585 __mutex_lock kernel/locking/mutex.c:735 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:787 __drm_fb_helper_restore_fbdev_mode_unlocked+0xb4/0x178 drivers/gpu/drm/drm_fb_helper.c:228 drm_fb_helper_set_par+0xc4/0x110 drivers/gpu/drm/drm_fb_helper.c:1351 fbcon_init+0xf34/0x1eb8 drivers/video/fbdev/core/fbcon.c:1113 visual_init+0x27c/0x548 drivers/tty/vt/vt.c:1011 do_bind_con_driver+0x7dc/0xe04 drivers/tty/vt/vt.c:3833 do_take_over_console+0x4ac/0x5f0 drivers/tty/vt/vt.c:4399 do_fbcon_takeover+0x158/0x260 drivers/video/fbdev/core/fbcon.c:549 do_fb_registered drivers/video/fbdev/core/fbcon.c:2988 [inline] fbcon_fb_registered+0x370/0x4ec drivers/video/fbdev/core/fbcon.c:3008 do_register_framebuffer drivers/video/fbdev/core/fbmem.c:449 [inline] register_framebuffer+0x470/0x610 drivers/video/fbdev/core/fbmem.c:515 __drm_fb_helper_initial_config_and_unlock+0x137c/0x1910 drivers/gpu/drm/drm_fb_helper.c:1841 drm_fb_helper_initial_config+0x48/0x64 drivers/gpu/drm/drm_fb_helper.c:1906 drm_fbdev_client_hotplug+0x158/0x22c drivers/gpu/drm/drm_fbdev_client.c:51 drm_client_register+0x144/0x1e0 drivers/gpu/drm/drm_client.c:140 drm_fbdev_client_setup+0x1a4/0x39c drivers/gpu/drm/drm_fbdev_client.c:158 drm_client_setup+0x28/0x9c drivers/gpu/drm/drm_client_setup.c:29 vkms_create drivers/gpu/drm/vkms/vkms_drv.c:230 [inline] vkms_init+0x4f0/0x600 drivers/gpu/drm/vkms/vkms_drv.c:256 do_one_initcall+0x254/0x9f8 init/main.c:1266 do_initcall_level+0x154/0x214 init/main.c:1328 do_initcalls+0x58/0xac init/main.c:1344 do_basic_setup+0x8c/0xa0 init/main.c:1363 kernel_init_freeable+0x324/0x478 init/main.c:1577 kernel_init+0x24/0x2a0 init/main.c:1466 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 -> #4 (console_lock){+.+.}-{0:0}: console_lock+0x19c/0x1f4 kernel/printk/printk.c:2833 __bch2_print_string_as_lines fs/bcachefs/util.c:267 [inline] bch2_print_string_as_lines+0x2c/0xd4 fs/bcachefs/util.c:286 __bch2_fsck_err+0x1864/0x2544 fs/bcachefs/error.c:411 bch2_check_fix_ptr fs/bcachefs/buckets.c:112 [inline] bch2_check_fix_ptrs+0x15b8/0x515c fs/bcachefs/buckets.c:266 bch2_trigger_extent+0x71c/0x814 fs/bcachefs/buckets.c:856 bch2_key_trigger fs/bcachefs/bkey_methods.h:87 [inline] bch2_gc_mark_key+0x4b4/0xb70 fs/bcachefs/btree_gc.c:634 bch2_gc_btree fs/bcachefs/btree_gc.c:670 [inline] bch2_gc_btrees fs/bcachefs/btree_gc.c:729 [inline] bch2_check_allocations+0x1018/0x48f4 fs/bcachefs/btree_gc.c:1133 bch2_run_recovery_pass+0xe4/0x1d4 fs/bcachefs/recovery_passes.c:191 bch2_run_recovery_passes+0x30c/0x73c fs/bcachefs/recovery_passes.c:244 bch2_fs_recovery+0x32d8/0x55dc fs/bcachefs/recovery.c:861 bch2_fs_start+0x30c/0x53c fs/bcachefs/super.c:1037 bch2_fs_get_tree+0x938/0x1030 fs/bcachefs/fs.c:2170 vfs_get_tree+0x90/0x28c fs/super.c:1814 do_new_mount+0x278/0x900 fs/namespace.c:3507 path_mount+0x590/0xe04 fs/namespace.c:3834 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount fs/namespace.c:4034 [inline] __arm64_sys_mount+0x4d4/0x5ac fs/namespace.c:4034 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #3 (&c->fsck_error_msgs_lock){+.+.}-{4:4}: __mutex_lock_common+0x218/0x28f4 kernel/locking/mutex.c:585 __mutex_lock kernel/locking/mutex.c:735 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:787 __bch2_fsck_err+0x344/0x2544 fs/bcachefs/error.c:282 bch2_check_fix_ptr fs/bcachefs/buckets.c:112 [inline] bch2_check_fix_ptrs+0x15b8/0x515c fs/bcachefs/buckets.c:266 bch2_trigger_extent+0x71c/0x814 fs/bcachefs/buckets.c:856 bch2_key_trigger fs/bcachefs/bkey_methods.h:87 [inline] bch2_gc_mark_key+0x4b4/0xb70 fs/bcachefs/btree_gc.c:634 bch2_gc_btree fs/bcachefs/btree_gc.c:670 [inline] bch2_gc_btrees fs/bcachefs/btree_gc.c:729 [inline] bch2_check_allocations+0x1018/0x48f4 fs/bcachefs/btree_gc.c:1133 bch2_run_recovery_pass+0xe4/0x1d4 fs/bcachefs/recovery_passes.c:191 bch2_run_recovery_passes+0x30c/0x73c fs/bcachefs/recovery_passes.c:244 bch2_fs_recovery+0x32d8/0x55dc fs/bcachefs/recovery.c:861 bch2_fs_start+0x30c/0x53c fs/bcachefs/super.c:1037 bch2_fs_get_tree+0x938/0x1030 fs/bcachefs/fs.c:2170 vfs_get_tree+0x90/0x28c fs/super.c:1814 do_new_mount+0x278/0x900 fs/namespace.c:3507 path_mount+0x590/0xe04 fs/namespace.c:3834 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount fs/namespace.c:4034 [inline] __arm64_sys_mount+0x4d4/0x5ac fs/namespace.c:4034 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #2 (&c->mark_lock){++++}-{0:0}: percpu_down_read+0x5c/0x2e8 include/linux/percpu-rwsem.h:51 __bch2_disk_reservation_add+0xc4/0x9f4 fs/bcachefs/buckets.c:1170 bch2_disk_reservation_add+0x29c/0x4f4 fs/bcachefs/buckets.h:367 __bch2_folio_reservation_get+0x2dc/0x798 fs/bcachefs/fs-io-pagecache.c:428 bch2_folio_reservation_get fs/bcachefs/fs-io-pagecache.c:477 [inline] bch2_page_mkwrite+0xa70/0xe44 fs/bcachefs/fs-io-pagecache.c:637 do_page_mkwrite+0x140/0x2dc mm/memory.c:3176 wp_page_shared mm/memory.c:3577 [inline] do_wp_page+0x1f50/0x38a0 mm/memory.c:3727 handle_pte_fault+0xe44/0x5890 mm/memory.c:5817 __handle_mm_fault mm/memory.c:5944 [inline] handle_mm_fault+0xf0c/0x17b0 mm/memory.c:6112 do_page_fault+0x404/0x10a8 arch/arm64/mm/fault.c:647 do_mem_abort+0x74/0x200 arch/arm64/mm/fault.c:919 el0_da+0x60/0x178 arch/arm64/kernel/entry-common.c:604 el0t_64_sync_handler+0xcc/0x108 arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #1 (sb_pagefaults#4){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1725 [inline] sb_start_pagefault include/linux/fs.h:1890 [inline] bch2_page_mkwrite+0x280/0xe44 fs/bcachefs/fs-io-pagecache.c:614 do_page_mkwrite+0x140/0x2dc mm/memory.c:3176 wp_page_shared mm/memory.c:3577 [inline] do_wp_page+0x1f50/0x38a0 mm/memory.c:3727 handle_pte_fault+0xe44/0x5890 mm/memory.c:5817 __handle_mm_fault mm/memory.c:5944 [inline] handle_mm_fault+0xf0c/0x17b0 mm/memory.c:6112 do_page_fault+0x404/0x10a8 arch/arm64/mm/fault.c:647 do_mem_abort+0x74/0x200 arch/arm64/mm/fault.c:919 el0_da+0x60/0x178 arch/arm64/kernel/entry-common.c:604 el0t_64_sync_handler+0xcc/0x108 arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #0 (&vma->vm_lock->lock){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5226 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5849 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 vma_start_write include/linux/mm.h:769 [inline] vm_flags_set include/linux/mm.h:899 [inline] vm_insert_page+0x2a0/0xab0 mm/memory.c:2241 packet_mmap+0x2f8/0x4c8 net/packet/af_packet.c:4680 sock_mmap+0x90/0xa8 net/socket.c:1403 call_mmap include/linux/fs.h:2183 [inline] mmap_file mm/internal.h:124 [inline] __mmap_new_file_vma mm/vma.c:2291 [inline] __mmap_new_vma mm/vma.c:2355 [inline] __mmap_region+0x1854/0x2180 mm/vma.c:2456 mmap_region+0x1f4/0x370 mm/mmap.c:1348 do_mmap+0x8b0/0xfd0 mm/mmap.c:496 vm_mmap_pgoff+0x1a0/0x38c mm/util.c:580 ksys_mmap_pgoff+0x3a4/0x5c8 mm/mmap.c:542 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 other info that might help us debug this: Chain exists of: &vma->vm_lock->lock --> &mm->mmap_lock --> &po->pg_vec_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&po->pg_vec_lock); lock(&mm->mmap_lock); lock(&po->pg_vec_lock); lock(&vma->vm_lock->lock); *** DEADLOCK *** 2 locks held by syz.8.396/8273: #0: ffff0000d6a2cc10 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline] #0: ffff0000d6a2cc10 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x154/0x38c mm/util.c:578 #1: ffff0000d4aa2868 (&po->pg_vec_lock){+.+.}-{4:4}, at: packet_mmap+0x9c/0x4c8 net/packet/af_packet.c:4650 stack backtrace: CPU: 0 UID: 0 PID: 8273 Comm: syz.8.396 Not tainted 6.13.0-rc3-syzkaller-g573067a5a685 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x154/0x1c0 kernel/locking/lockdep.c:2074 check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5226 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5849 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 vma_start_write include/linux/mm.h:769 [inline] vm_flags_set include/linux/mm.h:899 [inline] vm_insert_page+0x2a0/0xab0 mm/memory.c:2241 packet_mmap+0x2f8/0x4c8 net/packet/af_packet.c:4680 sock_mmap+0x90/0xa8 net/socket.c:1403 call_mmap include/linux/fs.h:2183 [inline] mmap_file mm/internal.h:124 [inline] __mmap_new_file_vma mm/vma.c:2291 [inline] __mmap_new_vma mm/vma.c:2355 [inline] __mmap_region+0x1854/0x2180 mm/vma.c:2456 mmap_region+0x1f4/0x370 mm/mmap.c:1348 do_mmap+0x8b0/0xfd0 mm/mmap.c:496 vm_mmap_pgoff+0x1a0/0x38c mm/util.c:580 ksys_mmap_pgoff+0x3a4/0x5c8 mm/mmap.c:542 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 --- 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