From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) (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 1A97717B50F for ; Wed, 25 Dec 2024 20:56:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735160185; cv=none; b=uMLGQrfxW+MCof6bP25/iudAzn2vw9qIfbWRFbVJsKu4Xqne/71Cni/ANE0sH6f0z3+pc24DVXHvG3ef6Knqvm860xTyyltLJV56yQgi1ywuyo7eW/xJ2QPq4iWJoiUYPjiEHUschizlzgcqQ6Edd/f43mikwS7GP8D/b5NRPkA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735160185; c=relaxed/simple; bh=5S24EW86UWkAAYkjVaeUQPnn522Xn6mecJ3uouuFo7Y=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=e7Ki0/t9zWq6Ojhrg83TY14JSp9mOR5WLoSm0WZ2GPmTWuoT14m3Kgxt/CF3fdAVcRXEAXbHb7yNB8PtRYvBdnom6s9pKhTgiMGRE+9a8cpbUEwPuWxhYXUzRN3NQupPaIeAFGCdmFu0cyr16COegAfIIurYv+W82EnzSKfy6pk= 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=209.85.166.205 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-f205.google.com with SMTP id e9e14a558f8ab-3a814bfb77bso63096055ab.0 for ; Wed, 25 Dec 2024 12:56:23 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1735160183; x=1735764983; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=0egcIQNFvpLTT5iBH0Sn8+eO3aOxy6ip2k0pMiMraCo=; b=DkvHoYGnWD8+f9fQkhWDFNrJrMCUiZw9PQy0f+mz2iOIBxS9qzo1vDhaiiyVORbQxc rlh2T0ksX63mpS3Zd2YQ9sYi3h7KXZAPUEPW4zqWyhlwGp5ASppzlml9hYE1onl8pNMM MJuPbFtFw3Bnp29w+4pnoTNAYAzOSF2vfQUtICz+C3kdjP8dz/Ru+fOR/LoUkSoGEDFq m31ZDdTUxOH7lR1J0dFYMDDwWzMY64wdF3djrugHM3uu42vePHQcjaCcJH8dGUyIyJnn 3A31lN/gKrs1V8EwSjvNKgG9KesKeZRhTrUJkGWMDuVoh5uf+9Jr0MTYgtS6h0Slgj4F InYg== X-Forwarded-Encrypted: i=1; AJvYcCXkuOEdUkGfF6stLrEFuZZTyydXwVQnT1PXdxzsvw7fpQvNKpyUatG7EwvfZLPl38zBeeWJoaTU0K/valE=@vger.kernel.org X-Gm-Message-State: AOJu0Yxf0fFXINspc+czxym/JxPJfqFf4AiYZjB+8Y4NJOv2kbyTaNfV 4/mUCOn2UA2VXoNi8KeJmBhhUUwvz6CNsN7YYEQiMycLl2nU0wYxWwuOhB9XtRWs41UT3uXHsWR 4H6TQxrUb33YUP1RsAfUGpasd2QCAdFnmBCZEKVntSK8C01wsRP0S8Kw= X-Google-Smtp-Source: AGHT+IGvdKVctsWQLrwOh3IRmdLPVYHJNCjRh15iQK8KLbgRk8s9jG9T0UhpsiAZzNfDvHgFG94gm2Sm63lzA7kDq5zQY3htdq30 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1e06:b0:3a7:cff5:16d6 with SMTP id e9e14a558f8ab-3c2fe4458fbmr164891095ab.3.1735160183273; Wed, 25 Dec 2024 12:56:23 -0800 (PST) Date: Wed, 25 Dec 2024 12:56:23 -0800 In-Reply-To: <67535904.050a0220.2477f.0008.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <676c7177.050a0220.2f3838.03ae.GAE@google.com> Subject: Re: [syzbot] [input?] [usb?] KASAN: slab-out-of-bounds Read in mcp2221_raw_event From: syzbot To: bentiss@kernel.org, jikos@kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: d7123c77dc60 usb: gadget: f_tcm: Refactor goto check_condi.. 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=134c0cc4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c7df994a0b7c30a9 dashboard link: https://syzkaller.appspot.com/bug?extid=52c1a7d3e5b361ccd346 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=174c0cc4580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ccb59f24626e/disk-d7123c77.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b51b5c87b9dc/vmlinux-d7123c77.xz kernel image: https://storage.googleapis.com/syzbot-assets/f66bf96bc8cc/bzImage-d7123c77.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+52c1a7d3e5b361ccd346@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in mcp2221_raw_event+0xf98/0x1030 drivers/hid/hid-mcp2221.c:852 Read of size 1 at addr ffff88811e03bfff by task kworker/1:2/2932 CPU: 1 UID: 0 PID: 2932 Comm: kworker/1:2 Not tainted 6.13.0-rc4-syzkaller-00068-gd7123c77dc60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events_power_efficient gc_worker 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:378 [inline] print_report+0xc3/0x620 mm/kasan/report.c:489 kasan_report+0xd9/0x110 mm/kasan/report.c:602 mcp2221_raw_event+0xf98/0x1030 drivers/hid/hid-mcp2221.c:852 __hid_input_report.constprop.0+0x312/0x440 drivers/hid/hid-core.c:2111 hid_irq_in+0x35e/0x870 drivers/hid/usbhid/hid-core.c:285 __usb_hcd_giveback_urb+0x389/0x6e0 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734 dummy_timer+0x17f7/0x3960 drivers/usb/gadget/udc/dummy_hcd.c:1993 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1803 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1820 handle_softirqs+0x206/0x8d0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0xfa/0x160 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__seqprop_spinlock_sequence include/linux/seqlock.h:227 [inline] RIP: 0010:nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:345 [inline] RIP: 0010:gc_worker+0x2e1/0x1760 net/netfilter/nf_conntrack_core.c:1534 Code: 00 00 48 c7 c7 28 51 56 8a e8 5b a6 2e fb 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 e9 d5 51 fb 48 85 db 58 0f 85 3d 10 00 00 6a d3 51 fb eb 07 e8 63 d3 51 fb f3 90 44 8b 35 ca b8 4c 04 44 RSP: 0018:ffffc9000140fbc8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8609a3fa RDX: ffff88810732d7c0 RSI: ffffffff8609a409 RDI: 0000000000000007 RBP: ffff888112200000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000012f2e R13: dffffc0000000000 R14: 0000000000025e5b R15: 0000000000040000 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 2832: 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 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4298 [inline] __kmalloc_node_track_caller_noprof+0x20b/0x4c0 mm/slub.c:4317 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:609 __alloc_skb+0x164/0x380 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1323 [inline] alloc_skb_with_frags+0xe4/0x850 net/core/skbuff.c:6612 sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2881 unix_dgram_sendmsg+0x467/0x1920 net/unix/af_unix.c:2027 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg net/socket.c:726 [inline] __sys_sendto+0x488/0x4f0 net/socket.c:2197 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2200 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 2825: 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:582 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:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4613 [inline] kfree+0x130/0x470 mm/slub.c:4761 skb_kfree_head net/core/skbuff.c:1086 [inline] skb_free_head+0x108/0x1d0 net/core/skbuff.c:1098 skb_release_data+0x760/0x910 net/core/skbuff.c:1125 skb_release_all net/core/skbuff.c:1190 [inline] __kfree_skb net/core/skbuff.c:1204 [inline] consume_skb net/core/skbuff.c:1436 [inline] consume_skb+0xbf/0x100 net/core/skbuff.c:1430 __unix_dgram_recvmsg+0x81c/0xdd0 net/unix/af_unix.c:2521 unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2538 sock_recvmsg_nosec net/socket.c:1033 [inline] sock_recvmsg+0x1f6/0x250 net/socket.c:1055 sock_read_iter+0x2bb/0x3b0 net/socket.c:1125 new_sync_read fs/read_write.c:484 [inline] vfs_read+0xa4c/0xbe0 fs/read_write.c:565 ksys_read+0x207/0x250 fs/read_write.c:708 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88811e03bc00 which belongs to the cache kmalloc-cg-512 of size 512 The buggy address is located 511 bytes to the right of allocated 512-byte region [ffff88811e03bc00, ffff88811e03be00) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11e038 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88810334f001 anon flags: 0x200000000000040(head|node=0|zone=2) page_type: f5(slab) raw: 0200000000000040 ffff88810004f140 ffffea000473e200 dead000000000003 raw: 0000000000000000 0000000000100010 00000001f5000000 ffff88810334f001 head: 0200000000000040 ffff88810004f140 ffffea000473e200 dead000000000003 head: 0000000000000000 0000000000100010 00000001f5000000 ffff88810334f001 head: 0200000000000002 ffffea0004780e01 ffffffffffffffff 0000000000000000 head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5837, tgid 5837 (udevd), ts 428785915799, free_ts 427670559123 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558 prep_new_page mm/page_alloc.c:1566 [inline] get_page_from_freelist+0xe76/0x2b90 mm/page_alloc.c:3476 __alloc_pages_noprof+0x21c/0x22a0 mm/page_alloc.c:4753 alloc_pages_mpol_noprof+0xeb/0x400 mm/mempolicy.c:2269 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab mm/slub.c:2589 [inline] new_slab+0x2c9/0x410 mm/slub.c:2642 ___slab_alloc+0xd1d/0x16e0 mm/slub.c:3830 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920 __slab_alloc_node mm/slub.c:3995 [inline] slab_alloc_node mm/slub.c:4156 [inline] __do_kmalloc_node mm/slub.c:4297 [inline] __kmalloc_node_track_caller_noprof+0x157/0x4c0 mm/slub.c:4317 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:609 __alloc_skb+0x164/0x380 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1323 [inline] alloc_skb_with_frags+0xe4/0x850 net/core/skbuff.c:6612 sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2881 unix_dgram_sendmsg+0x467/0x1920 net/unix/af_unix.c:2027 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg net/socket.c:726 [inline] sock_write_iter+0x4fe/0x5b0 net/socket.c:1147 new_sync_write fs/read_write.c:586 [inline] vfs_write+0x5ae/0x1150 fs/read_write.c:679 ksys_write+0x207/0x250 fs/read_write.c:731 page last free pid 2843 tgid 2843 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0x661/0xe40 mm/page_alloc.c:2659 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x4e/0x70 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4119 [inline] slab_alloc_node mm/slub.c:4168 [inline] kmem_cache_alloc_noprof+0x154/0x3b0 mm/slub.c:4175 getname_flags.part.0+0x4c/0x550 fs/namei.c:139 getname_flags include/linux/audit.h:322 [inline] getname+0x8d/0xe0 fs/namei.c:223 do_sys_openat2+0x104/0x1e0 fs/open.c:1396 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88811e03be80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88811e03bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88811e03bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88811e03c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88811e03c080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 c7 c7 28 51 56 8a mov $0xffffffff8a565128,%rdi 9: e8 5b a6 2e fb call 0xfb2ea669 e: 9c pushf f: 5b pop %rbx 10: 81 e3 00 02 00 00 and $0x200,%ebx 16: 31 ff xor %edi,%edi 18: 48 89 de mov %rbx,%rsi 1b: e8 e9 d5 51 fb call 0xfb51d609 20: 48 85 db test %rbx,%rbx 23: 58 pop %rax 24: 0f 85 3d 10 00 00 jne 0x1067 * 2a: e8 6a d3 51 fb call 0xfb51d399 <-- trapping instruction 2f: eb 07 jmp 0x38 31: e8 63 d3 51 fb call 0xfb51d399 36: f3 90 pause 38: 44 8b 35 ca b8 4c 04 mov 0x44cb8ca(%rip),%r14d # 0x44cb909 3f: 44 rex.R --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.