From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E386C6FD18 for ; Wed, 19 Apr 2023 06:49:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231431AbjDSGt4 (ORCPT ); Wed, 19 Apr 2023 02:49:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58708 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231566AbjDSGtu (ORCPT ); Wed, 19 Apr 2023 02:49:50 -0400 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 03BF010CE for ; Tue, 18 Apr 2023 23:49:48 -0700 (PDT) Received: by mail-il1-f199.google.com with SMTP id e9e14a558f8ab-328f6562564so68483305ab.1 for ; Tue, 18 Apr 2023 23:49:47 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681886987; x=1684478987; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=YZsQ5aPD6oFSjY71lAPkFKmwRM62j4k/Q+fhL8soLuk=; b=bLEJTyLPuGHuF+JWJ2pICbDstNsExQJggw/Hd3dwv5yVan1VwM4V7UGp+SXcPoZ7Yh mndVF+RkQ+RkzqTYIdZWzuxNDZoTlLF9OcFv9u0/5hTfp20jcfZgTdbTesaSQyhkop8R ZRDWselthTb1nZalaMNR0sXbNqDyggt49FqF7uv2xPwr4Z6DT/qa3jxIJhpTnNnC/aWq zke5DbB2fP1L0V41x8wQ4NNSMBx1zVlfnxcl84+vLAtcxWQKYs6v9hfuIavyhOuFjcfG tamM754QseG1vFI7IMOlb3GEuFiBVfh2r+pNaLvb8new2Rh7F4Gp6jWztEzRW0Wm1/wd 7ttA== X-Gm-Message-State: AAQBX9fcD/nmPKfRAgPfjmXmVtyZxH9vtH30lrwaGOh4IcrevGhtFOeX OIVOqRWrpF9eYBPCkhoG3VHL5/UpNkI+MHVahoQciqyy+RJBDbo= X-Google-Smtp-Source: AKy350bcTeZTLNjnTPUNbGZEAm+soJGSmpILNbRMwQxWgi7b0y5S7B6oLoM+Vc3yybC3BHO1ejrbXiywpZY1W8ZAVsNskwlD6AcB MIME-Version: 1.0 X-Received: by 2002:a92:d0c1:0:b0:32b:5e:e209 with SMTP id y1-20020a92d0c1000000b0032b005ee209mr5974257ila.1.1681886987332; Tue, 18 Apr 2023 23:49:47 -0700 (PDT) Date: Tue, 18 Apr 2023 23:49:47 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006eb4a605f9aad43b@google.com> Subject: [syzbot] [media?] KASAN: slab-out-of-bounds Read in v4l2_compat_put_array_args (2) From: syzbot To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 95abc817ab3a Merge tag 'acpi-6.3-rc7' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=147a14e7c80000 kernel config: https://syzkaller.appspot.com/x/.config?x=c21559e740385326 dashboard link: https://syzkaller.appspot.com/bug?extid=3cea453754f73db49fa5 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3cea453754f73db49fa5@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in instrument_copy_to_user include/linux/instrumented.h:119 [inline] BUG: KASAN: slab-out-of-bounds in _copy_to_user lib/usercopy.c:40 [inline] BUG: KASAN: slab-out-of-bounds in _copy_to_user+0x11a/0x150 lib/usercopy.c:34 Read of size 16 at addr ffff88801bd7d658 by task syz-executor.3/15229 CPU: 0 PID: 15229 Comm: syz-executor.3 Not tainted 6.3.0-rc6-syzkaller-00168-g95abc817ab3a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319 print_report mm/kasan/report.c:430 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:536 check_region_inline mm/kasan/generic.c:181 [inline] kasan_check_range+0x141/0x190 mm/kasan/generic.c:187 instrument_copy_to_user include/linux/instrumented.h:119 [inline] _copy_to_user lib/usercopy.c:40 [inline] _copy_to_user+0x11a/0x150 lib/usercopy.c:34 copy_to_user include/linux/uaccess.h:169 [inline] v4l2_compat_put_array_args+0x484/0x830 drivers/media/v4l2-core/v4l2-compat-ioctl32.c:1154 video_usercopy+0x46e/0x15f0 drivers/media/v4l2-core/v4l2-ioctl.c:3435 v4l2_ioctl+0x1b7/0x250 drivers/media/v4l2-core/v4l2-dev.c:364 v4l2_compat_ioctl32+0x23b/0x2a0 drivers/media/v4l2-core/v4l2-compat-ioctl32.c:1253 __do_compat_sys_ioctl+0x255/0x2b0 fs/ioctl.c:968 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7fb7579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7fb25cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000c0cc5604 RDX: 0000000020000480 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 15229: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node+0x61/0x1a0 mm/slab_common.c:974 kmalloc_node include/linux/slab.h:610 [inline] kvmalloc_node+0xa2/0x1a0 mm/util.c:603 kvmalloc include/linux/slab.h:737 [inline] video_usercopy+0x642/0x15f0 drivers/media/v4l2-core/v4l2-ioctl.c:3386 v4l2_ioctl+0x1b7/0x250 drivers/media/v4l2-core/v4l2-dev.c:364 v4l2_compat_ioctl32+0x23b/0x2a0 drivers/media/v4l2-core/v4l2-compat-ioctl32.c:1253 __do_compat_sys_ioctl+0x255/0x2b0 fs/ioctl.c:968 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 The buggy address belongs to the object at ffff88801bd7d640 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes to the right of allocated 24-byte region [ffff88801bd7d640, ffff88801bd7d658) The buggy address belongs to the physical page: page:ffffea00006f5f40 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801bd7d840 pfn:0x1bd7d ksm flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff888012442500 ffffea000079bb40 dead000000000003 raw: ffff88801bd7d840 0000000080400032 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 28974, tgid 28974 (syz-executor.1), ts 809995593806, free_ts 808146796979 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x1190/0x2e20 mm/page_alloc.c:4326 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:5592 __alloc_pages_node include/linux/gfp.h:237 [inline] alloc_slab_page mm/slub.c:1853 [inline] allocate_slab+0xa7/0x390 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc_node+0x51/0x1a0 mm/slab_common.c:974 kmalloc_array_node include/linux/slab.h:697 [inline] kcalloc_node include/linux/slab.h:702 [inline] memcg_alloc_slab_cgroups+0x8f/0x150 mm/memcontrol.c:2899 account_slab mm/slab.h:653 [inline] allocate_slab+0x2d6/0x390 mm/slub.c:2016 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] kmem_cache_alloc_node+0x138/0x3e0 mm/slub.c:3497 alloc_task_struct_node kernel/fork.c:171 [inline] dup_task_struct kernel/fork.c:974 [inline] copy_process+0x3aa/0x7590 kernel/fork.c:2098 kernel_clone+0xeb/0x890 kernel/fork.c:2682 __do_compat_sys_ia32_clone+0x9e/0xd0 arch/x86/kernel/sys_ia32.c:254 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] do_int80_syscall_32+0x4a/0x90 arch/x86/entry/common.c:132 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1454 [inline] free_pcp_prepare+0x5d5/0xa50 mm/page_alloc.c:1504 free_unref_page_prepare mm/page_alloc.c:3388 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3483 vfree+0x180/0x7e0 mm/vmalloc.c:2742 delayed_vfree_work+0x57/0x70 mm/vmalloc.c:2663 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff88801bd7d500: 00 00 00 00 fc fc fc fc fa fb fb fb fc fc fc fc ffff88801bd7d580: fb fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc >ffff88801bd7d600: 00 00 00 00 fc fc fc fc 00 00 00 fc fc fc fc fc ^ ffff88801bd7d680: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ffff88801bd7d700: fb fb fb fb fc fc fc fc 00 00 00 00 fc fc fc fc ================================================================== ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 retq 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi --- This report is generated by a bot. 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