From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo2-f10.google.com (mail-oo2-f10.google.com [74.125.231.138]) (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 12E75485927 for ; Mon, 21 Sep 2026 15:53:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.138 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790006016; cv=none; b=tpxRoRfI5OwHAarIh9b5sbIG/UzbT1klqfWptERE4i432EqSeTz3g4LwMdCecjo3iMPFQcgiKdYi8U3OwKIyW5g8GnlTrJwX1ft4y2l3+Gzzxv2ubR2xE48kS0VJrSdSggBbRYNxUAYgF5jwYtW/vVaSFPFlLzT4vEQGKH+JHkA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790006016; c=relaxed/simple; bh=fTvNvME2QHx0C88CSWRrZq/fVoC6CXah0IoLt2dTyJ4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=fDSM+P7TCPIFf+xKrFEoOo9FFjg9M3YBi+ikLCzVNXSFShDbMoj1YN81giQmhFBLUbavRyQ5LN4xai/4sJfN+1ugxCN75iHwZ9Bgm6vhVoy/J+cOtCRCPrTHZwArJN1Bqx73hyt5z/rLyH4J0R2jfIyBYxLQXNTktw3AISetHB8= 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=74.125.231.138 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-oo2-f10.google.com with SMTP id 006d021491bc7-6c12320cb24so209391eaf.1 for ; Mon, 21 Sep 2026 08:53:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790006012; x=1790610812; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=Y2YyDT5aQohfeEoOXtxE5mWkAxqK5sgs5x7QOqMz9t0=; b=fWu7iL0QyQdn+GIGhsUKejWbaBrNPugvRN6M/km3/n7BtpKXe0fD0jiKFT6aelnl2p LlVxxGllXxJCqi03BVSynhX9Os7RhKJ3/CNHRxuvlGELPuOKrPf98QIz+ha0Ytb3hEDw f1AcR75dl3qSzXBcMAT1Nbpcjk8Fi6GGT6ZUiflvi182tBCxGpahBHA/1BJoEGkpnNZx MT1HGDFuUQO3jqQY8+BsElfv0aAzeUQ76DKp4bDofOOayWY/WAIoyrO6MUlBU88eK1wh UmmhsFNk6FzfhCWY8ve2nTqiOtLCHmd5hf5cExXug8ePEhIKRWOuMX+qjDqtRVoiyj4w AsnA== X-Forwarded-Encrypted: i=1; AKwUvBz4lMsDDJDKK90QYh0mc7olxbJa1I0YPCDyMkVa1T80VcwDgXlFUF7MaxTjnvkk+yk47b8lmSqM/ZYp91g=@vger.kernel.org X-Gm-Message-State: AFuF++m1QJryJVSFGmSgpKVvvbHcmAmHBzuu2czYFEZPlwbSThJHxXpe z/WKmwYECNmuK/eo8IeHO+dRxwftz82Sk3U2AyBeAJ4vGNI8zYnRU5rMqqxHNvFZqpjaIkexEs9 qdv3KfDQ4baISNhPosC9sUvX5ER8OIo7xX0Mn6U6kA956l4GZelHpPTsCjAY= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:8c5:b0:6b7:8396:f3d4 with SMTP id 006d021491bc7-6ca9cb58539mr10773263eaf.54.1790006012641; Mon, 21 Sep 2026 08:53:32 -0700 (PDT) Date: Mon, 21 Sep 2026 08:53:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ab152fc.71f81b7d.15fa6d.0030.GAE@google.com> Subject: [syzbot] [ecryptfs?] KASAN: slab-out-of-bounds Read in ecryptfs_write_tag_70_packet From: syzbot To: code@tyhicks.com, ecryptfs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 518e5b794c06 Merge tag 'for-7.3-rc3-tag' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17e5fff9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c3bddd52b22c2498 dashboard link: https://syzkaller.appspot.com/bug?extid=e4391e0d6e7c89b8c84e compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1015fff9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10b73915580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-518e5b79.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5307a29f916b/vmlinux-518e5b79.xz kernel image: https://storage.googleapis.com/syzbot-assets/7d4c698a99b1/bzImage-518e5b79.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/4a20c8843682/mount_0.gz fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=13e5fff9580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e4391e0d6e7c89b8c84e@syzkaller.appspotmail.com EXT4-fs (loop0): mounted filesystem 76b65be2-f6da-4727-8c75-0525a5b65a09 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /0/mnt supports timestamps until 2038-01-19 (0x7fffffff) ================================================================== BUG: KASAN: slab-out-of-bounds in ecryptfs_write_tag_70_packet+0x1241/0x12e0 fs/ecryptfs/keystore.c:742 Read of size 4 at addr ffff88801225e298 by task syz.0.17/5512 CPU: 0 UID: 0 PID: 5512 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description+0x55/0x1e0 mm/kasan/report.c:378 print_report+0x58/0x70 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 ecryptfs_write_tag_70_packet+0x1241/0x12e0 fs/ecryptfs/keystore.c:742 ecryptfs_encrypt_filename fs/ecryptfs/crypto.c:1378 [inline] ecryptfs_encrypt_and_encode_filename+0x576/0x1580 fs/ecryptfs/crypto.c:1789 ecryptfs_lookup+0x20e/0x780 fs/ecryptfs/inode.c:402 lookup_open+0x9e1/0x1a40 fs/namei.c:4528 open_last_lookups fs/namei.c:4767 [inline] path_openat+0x677/0x1d60 fs/namei.c:4997 do_file_open+0x23e/0x4a0 fs/namei.c:5029 do_sys_openat2+0x115/0x200 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_openat fs/open.c:1439 [inline] __se_sys_openat fs/open.c:1434 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1434 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa04199e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff0259f088 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fa041c25fa0 RCX: 00007fa04199e159 RDX: 0000000000000800 RSI: 0000200000000680 RDI: ffffffffffffff9c RBP: 00007fa041a3506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa041c25fac R14: 00007fa041c25fa0 R15: 00007fa041c25fa0 Allocated by task 5512: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5414 [inline] __kmalloc_noprof+0x36b/0x720 mm/slub.c:5439 _kmalloc_noprof include/linux/slab.h:995 [inline] user_preparse+0x9e/0x160 security/keys/user_defined.c:67 __key_create_or_update+0x3a9/0xa80 security/keys/key.c:857 key_create_or_update+0x42/0x60 security/keys/key.c:1021 __do_sys_add_key security/keys/keyctl.c:134 [inline] __se_sys_add_key+0x349/0x420 security/keys/keyctl.c:74 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88801225e000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 270 bytes to the right of allocated 394-byte region [ffff88801225e000, ffff88801225e18a) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1225e head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801b041c80 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000 head: 00fff00000000040 ffff88801b041c80 dead000000000100 dead000000000122 head: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000 head: 00fff00000000001 ffffffffffffff81 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5447, tgid 5447 (syz-executor), ts 113774270032 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871 prep_new_page mm/page_alloc.c:1879 [inline] get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943 __alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436 alloc_slab_page mm/slub.c:3347 [inline] allocate_slab+0x7d/0x620 mm/slub.c:3462 new_slab mm/slub.c:3513 [inline] refill_objects+0x2d5/0x350 mm/slub.c:7417 refill_sheaf mm/slub.c:2885 [inline] __pcs_replace_empty_main+0x2c8/0x6c0 mm/slub.c:4774 alloc_from_pcs mm/slub.c:4850 [inline] slab_alloc_node mm/slub.c:4984 [inline] __do_kmalloc_node mm/slub.c:5413 [inline] __kmalloc_noprof+0x47b/0x720 mm/slub.c:5439 _kmalloc_noprof include/linux/slab.h:995 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] fib6_info_alloc+0x30/0xf0 net/ipv6/ip6_fib.c:155 ip6_route_info_create+0x149/0x890 net/ipv6/route.c:3833 ip6_route_add+0x49/0x1b0 net/ipv6/route.c:3962 addrconf_prefix_route+0x3a2/0x480 net/ipv6/addrconf.c:2504 inet6_addr_add+0x504/0xb50 net/ipv6/addrconf.c:3077 inet6_rtm_newaddr+0x9fc/0xe00 net/ipv6/addrconf.c:5095 rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7137 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2575 netlink_unicast_kernel net/netlink/af_netlink.c:1338 [inline] netlink_unicast+0x7bd/0x940 net/netlink/af_netlink.c:1364 page last free pid 5421 tgid 5421 ts 110085182085 stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1418 [inline] __free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962 __tlb_remove_table_free mm/mmu_gather.c:228 [inline] tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291 rcu_do_batch kernel/rcu/tree.c:2650 [inline] rcu_core+0x926/0x1260 kernel/rcu/tree.c:2919 handle_softirqs+0x226/0x860 kernel/softirq.c:645 __do_softirq kernel/softirq.c:679 [inline] invoke_softirq kernel/softirq.c:519 [inline] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 Memory state around the buggy address: ffff88801225e180: 00 02 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801225e200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88801225e280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88801225e300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801225e380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- This report is generated by a bot. 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