From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (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 32FA713CFA3 for ; Mon, 14 Oct 2024 06:11:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728886291; cv=none; b=FPCV0SS4YF+8T3Hm6sz78tvhakEGtbqWlFYXb496ikgCmKXxq2aWRLvtV+C+P9BFNv/r9Gdi+Bzq5qfQW7xxBkJWtn37VPZ9mDiUOYv/7GZVe/V1JRphUjvSj0OgNTQzJdwWOsVMaX1RAYy+hag3MXlbnk8MvOqj83eiiBWKHWo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728886291; c=relaxed/simple; bh=jXZu+jwnZtNiiZzdkWY9TNELbHfPDBDiOC4Wh3Dq5ng=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=O4B6VmbFUrQEYlvl1se+HbekeSX7OJHhKJrxGkHbiNgpRmLb+tCYN3eAFR0Z3N8ZQlgzYL5KkGLodd5+NC3IrIFQ/PEYhlkK4mk0TBoq40LejKnJ40Ivj7WpihW084gmE5cCPvTUoGxUWcXhynZCE6MzgJECm9HB782p8/MmOuI= 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=209.85.166.70 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-f70.google.com with SMTP id ca18e2360f4ac-8354dae2e52so313528839f.3 for ; Sun, 13 Oct 2024 23:11:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728886289; x=1729491089; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=KAwTPqEyGyOrmmEsiyfcIP87G1YgVMRbUzNYraNxtcE=; b=KZGOF0DTEd8Nw3yqZ9NrmSElLuCB+dijJ58ml4s84zo3J1qs71uIt/DxTIF7imw+Fx EDgTOT4i0t1ECtJjfSRp9xXP++gIa3mTCw99KLP8OZa61CcSVJ5Lw1eLMSHlkw8Sok7j C6Nk3vnLDj4tT0txfUAUHhVZwh3OtIYS3rKTQS3l/qOEwx+C/FufJKuBBc2/vBGMgrJz V6zNvLEFbEW+sGW5viEXq4+3DGm5mxFMPJ2EO/HI/upEABs60amVylzJqepZYLHvTNkk 9PRF2dZHmuUGOBbTJHgZlYwtf/8aR7dG2L5xNcn9Ocb//In/4R1esyYlI37XNpIyPwp8 RKNw== X-Gm-Message-State: AOJu0YzgECk1rPTCioclyYRJFzGDD4MHCf4e7NIR7bqIXeN0G+zziyOa s41DwyOcQrRyAgfS0j56ifEBXWYhr108MUTwj7aqH9WsG3nxa2p7WvDCuzJsxtxBOwrvILxtSxV j7lcdFA008uhPaO4VhWfavF0dwSUzsz6C+ZrMcvqjCYNNE6PIjZfimnk= X-Google-Smtp-Source: AGHT+IH0mtP29tXuQOKaQuuYOWiOZo16WQQxpPEYRQ3LRP5Q/DmXNkR5cFkdFLnezXI7X+7Z4kRyMNQkebR68ofGFFQQcl6nVHZC Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a2e:b0:3a3:96c4:29bc with SMTP id e9e14a558f8ab-3a3b5f70adfmr92007305ab.11.1728886289376; Sun, 13 Oct 2024 23:11:29 -0700 (PDT) Date: Sun, 13 Oct 2024 23:11:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <670cb611.050a0220.3e960.0055.GAE@google.com> Subject: [syzbot] [media?] KASAN: slab-use-after-free Read in __video_register_device From: syzbot To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-usb@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 9852d85ec9d4 Linux 6.12-rc1 git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=159d5527980000 kernel config: https://syzkaller.appspot.com/x/.config?x=4510af5d637450fb dashboard link: https://syzkaller.appspot.com/bug?extid=65e7f3352b7346273644 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: https://storage.googleapis.com/syzbot-assets/d44acbbed8bd/disk-9852d85e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8e54c80139e6/vmlinux-9852d85e.xz kernel image: https://storage.googleapis.com/syzbot-assets/35f22e8643ee/bzImage-9852d85e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+65e7f3352b7346273644@syzkaller.appspotmail.com pwc: recv_control_msg error -71 req 04 val 1100 pwc: recv_control_msg error -71 req 04 val 1200 ================================================================== BUG: KASAN: slab-use-after-free in get_index drivers/media/v4l2-core/v4l2-dev.c:512 [inline] BUG: KASAN: slab-use-after-free in __video_register_device+0x4a2d/0x5aa0 drivers/media/v4l2-core/v4l2-dev.c:1028 Read of size 8 at addr ffff88811258c720 by task kworker/1:4/4947 CPU: 1 UID: 0 PID: 4947 Comm: kworker/1:4 Not tainted 6.12.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 get_index drivers/media/v4l2-core/v4l2-dev.c:512 [inline] __video_register_device+0x4a2d/0x5aa0 drivers/media/v4l2-core/v4l2-dev.c:1028 video_register_device include/media/v4l2-dev.h:383 [inline] usb_pwc_probe+0xc69/0x1d40 drivers/media/usb/pwc/pwc-if.c:1123 usb_probe_interface+0x309/0x9d0 drivers/usb/core/driver.c:399 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x23e/0xa90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:958 bus_for_each_drv+0x157/0x1e0 drivers/base/bus.c:459 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:534 device_add+0x114b/0x1a70 drivers/base/core.c:3675 usb_set_configuration+0x10cb/0x1c50 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:254 usb_probe_device+0xec/0x3e0 drivers/usb/core/driver.c:294 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x23e/0xa90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:958 bus_for_each_drv+0x157/0x1e0 drivers/base/bus.c:459 __device_attach+0x1e8/0x4b0 drivers/base/dd.c:1030 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:534 device_add+0x114b/0x1a70 drivers/base/core.c:3675 usb_new_device+0xd90/0x1a10 drivers/usb/core/hub.c:2651 hub_port_connect drivers/usb/core/hub.c:5521 [inline] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] port_event drivers/usb/core/hub.c:5821 [inline] hub_event+0x2e58/0x4f40 drivers/usb/core/hub.c:5903 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 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 Allocated by task 2511: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:394 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] em28xx_v4l2_init+0x114/0x4050 drivers/media/usb/em28xx/em28xx-video.c:2534 em28xx_init_extension+0x137/0x200 drivers/media/usb/em28xx/em28xx-core.c:1117 request_module_async+0x61/0x70 drivers/media/usb/em28xx/em28xx-cards.c:3457 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 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 Freed by task 2511: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x37/0x50 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2343 [inline] slab_free mm/slub.c:4580 [inline] kfree+0x130/0x480 mm/slub.c:4728 em28xx_free_v4l2 drivers/media/usb/em28xx/em28xx-video.c:2120 [inline] kref_put include/linux/kref.h:65 [inline] em28xx_v4l2_init+0x22a4/0x4050 drivers/media/usb/em28xx/em28xx-video.c:2903 em28xx_init_extension+0x137/0x200 drivers/media/usb/em28xx/em28xx-core.c:1117 request_module_async+0x61/0x70 drivers/media/usb/em28xx/em28xx-cards.c:3457 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 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 The buggy address belongs to the object at ffff88811258c000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 1824 bytes inside of freed 8192-byte region [ffff88811258c000, ffff88811258e000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x112588 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x200000000000040(head|node=0|zone=2) page_type: f5(slab) raw: 0200000000000040 ffff888100042280 ffffea0004856c00 dead000000000004 raw: 0000000000000000 0000000080020002 00000001f5000000 0000000000000000 head: 0200000000000040 ffff888100042280 ffffea0004856c00 dead000000000004 head: 0000000000000000 0000000080020002 00000001f5000000 0000000000000000 head: 0200000000000003 ffffea0004496201 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4999, tgid 4999 (kworker/1:5), ts 478011086957, free_ts 477789466413 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0xd5c/0x2630 mm/page_alloc.c:3457 __alloc_pages_noprof+0x221/0x22a0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0xeb/0x400 mm/mempolicy.c:2265 alloc_slab_page mm/slub.c:2413 [inline] allocate_slab mm/slub.c:2579 [inline] new_slab+0x2ba/0x3f0 mm/slub.c:2632 ___slab_alloc+0xd45/0x1760 mm/slub.c:3819 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x325/0x3c0 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] usb_get_configuration+0x122/0x5e50 drivers/usb/core/config.c:894 usb_enumerate_device drivers/usb/core/hub.c:2483 [inline] usb_new_device+0x1189/0x1a10 drivers/usb/core/hub.c:2621 --- 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