From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f208.google.com (mail-oi1-f208.google.com [209.85.167.208]) (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 250A23859C3 for ; Thu, 25 Jun 2026 08:49:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782377366; cv=none; b=dRjItjd1UpPslyiovVZ7z6HTT8hpQzR+qjfTc7gJfBNM5lBHkxwIwLP82lH2QkZO+jYbi/YtCad8cQzuiotzZ61ZKzy77XUFv/1zuneMkkvLQ3n6QgRG54IwrjwxiJHd7mq8nSlJgIGZUIt30Vta1v7WD3JCSlCkvIz5Zg6PcYw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782377366; c=relaxed/simple; bh=BGEn8tzajDI7dMs5lQdfbTKwuppjxLtH7uh8PWBeEE4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=UIJoG93de7sLJvyOZNRog80kKINdFJIFoPT/B0lV+iRRABYfDGSSiqhv6j/UT0Cw/sA+JMRDXZXsI7WTA9PSPFtkgU0BBm1+ojAWhZCZ8W/acTRs/l2nKjVkcVrHV2CVGr/oslwGRt7p/QOyqbtenIV4mc4BdvgDHq3btobl6M8= 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=209.85.167.208 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-oi1-f208.google.com with SMTP id 5614622812f47-48687e7f161so2687651b6e.2 for ; Thu, 25 Jun 2026 01:49:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782377364; x=1782982164; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=RwBHjbDnk6TmHx0CyYLVT8LnDjM1iusgihZDKtpP2y8=; b=sAmMKreh19ownfcEOawkivXXhOnI5HcFe94qlvbmBAg3BezdCK/w5yuL07VNSD55BX HZH3gLRNjLU+rJXMysNj2NndA2XTiHnKq+fLtCB3D8ljkTcmv7TG6vVZRcG/wocGMMRF e3ih78vrXUbUQ4fnowciQ0XsEPLZ+CNDc5Pl2gvkobvJQUC2uiZRvIHjuq9tqm1xUSaS Ng9cP+3Rr0iqbLVs6x8WJqlDcmpvuKiYAmwHzCX119AL3frSMB2OJaS80owaFe+JRQtw 48blr1oh3Vrd5nQ79aGSXe/kKvmQ2b8wpzApTdRWej+0yXk2gHcMUI3Mafhsvqz2/5c1 tJtA== X-Forwarded-Encrypted: i=1; AFNElJ+s/W2eh+hBh0D8CDKIQeFKpYDwab94J1FHnFoTVhrzYVfQ5LyVnM/8kdNMbV+44UoNiqoZzEs=@vger.kernel.org X-Gm-Message-State: AOJu0Yzx52Z8KL47OK3tdNNVDooarFfsQk1ZfWdR40tLTxd+msFvEQar ghNv4WDtM+wsryJ4Jz4uE6yeFOWwXLhbnwKY8FyUvmRrUjML1dY+fW6HI9k7C36+22qbGnGQjwc LDovSllqrUFjIBAnV36APXxaLnzlI73espUzZcybGaC10T7pJz4VRb2aI7Ko= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:c194:b0:48a:3452:e8ef with SMTP id 5614622812f47-4921593f274mr1478989b6e.0.1782377364146; Thu, 25 Jun 2026 01:49:24 -0700 (PDT) Date: Thu, 25 Jun 2026 01:49:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a3ceb94.43b4ff68.30a095.0004.GAE@google.com> Subject: [syzbot] [net?] KASAN: stack-out-of-bounds Read in xfrm_state_find (6) From: syzbot To: davem@davemloft.net, edumazet@google.com, herbert@gondor.apana.org.au, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, steffen.klassert@secunet.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: a975094bf98c Merge tag 'exfat-for-7.2-rc1' of git://git.ke.. git tree: bpf-next console output: https://syzkaller.appspot.com/x/log.txt?x=14c0eba1580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9519196b0a0d47bc dashboard link: https://syzkaller.appspot.com/bug?extid=0ac4d84afe1066a1f3e9 compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/25ab9553b7ce/disk-a975094b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5498f6d5131a/vmlinux-a975094b.xz kernel image: https://storage.googleapis.com/syzbot-assets/90c6fca52c8c/bzImage-a975094b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0ac4d84afe1066a1f3e9@syzkaller.appspotmail.com ================================================================== BUG: KASAN: stack-out-of-bounds in jhash2 include/linux/jhash.h:138 [inline] BUG: KASAN: stack-out-of-bounds in __xfrm6_addr_hash net/xfrm/xfrm_hash.h:16 [inline] BUG: KASAN: stack-out-of-bounds in __xfrm6_daddr_saddr_hash net/xfrm/xfrm_hash.h:29 [inline] BUG: KASAN: stack-out-of-bounds in __xfrm_dst_hash net/xfrm/xfrm_hash.h:95 [inline] BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x590d/0x5ec0 net/xfrm/xfrm_state.c:1421 Read of size 4 at addr ffffc900061a7908 by task syz.8.4714/27393 CPU: 1 UID: 0 PID: 27393 Comm: syz.8.4714 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 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 jhash2 include/linux/jhash.h:138 [inline] __xfrm6_addr_hash net/xfrm/xfrm_hash.h:16 [inline] __xfrm6_daddr_saddr_hash net/xfrm/xfrm_hash.h:29 [inline] __xfrm_dst_hash net/xfrm/xfrm_hash.h:95 [inline] xfrm_state_find+0x590d/0x5ec0 net/xfrm/xfrm_state.c:1421 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2513 [inline] xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2564 [inline] xfrm_resolve_and_create_bundle+0x7f3/0x3070 net/xfrm/xfrm_policy.c:2862 xfrm_bundle_lookup net/xfrm/xfrm_policy.c:3097 [inline] xfrm_lookup_with_ifid+0x576/0x1b40 net/xfrm/xfrm_policy.c:3228 xfrm_lookup net/xfrm/xfrm_policy.c:3327 [inline] xfrm_lookup_route+0x3c/0x1c0 net/xfrm/xfrm_policy.c:3338 raw_sendmsg+0x110d/0x1a20 net/ipv4/raw.c:628 sock_sendmsg_nosec+0x10e/0x180 net/socket.c:776 __sock_sendmsg net/socket.c:790 [inline] ____sys_sendmsg+0x54e/0x850 net/socket.c:2684 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2738 __sys_sendmsg net/socket.c:2770 [inline] __do_sys_sendmsg net/socket.c:2775 [inline] __se_sys_sendmsg net/socket.c:2773 [inline] __x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2773 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7feeebb9ce59 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:00007feeeca26028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007feeebe15fa0 RCX: 00007feeebb9ce59 RDX: 000000000400c894 RSI: 0000200000000900 RDI: 0000000000000007 RBP: 00007feeebc32e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007feeebe16038 R14: 00007feeebe15fa0 R15: 00007fff5f12fac8 The buggy address belongs to stack of task syz.8.4714/27393 and is located at offset 328 in frame: raw_sendmsg+0x0/0x1a20 net/ipv4/raw.c:909 This frame has 5 objects: [32, 104) 'opt_copy_u' [144, 200) 'ipc' [240, 248) 'rt' [272, 328) 'fl4' [368, 392) 'rfv' The buggy address belongs to a 8-page vmalloc region starting at 0xffffc900061a0000 allocated at copy_process+0x81b/0x42e0 kernel/fork.c:2110 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8b157 memcg:ffff88807cfe5e02 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 ffffea00022c55c8 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff ffff88807cfe5e02 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x29c2(GFP_NOWAIT|__GFP_HIGHMEM|__GFP_IO|__GFP_FS|__GFP_ZERO), pid 27358, tgid 27357 (syz.3.4705), ts 776904415615, free_ts 773990322016 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0x21fa/0x2270 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5304 alloc_pages_mpol+0x212/0x380 mm/mempolicy.c:2490 alloc_frozen_pages_noprof mm/mempolicy.c:2561 [inline] alloc_pages_noprof+0xac/0x2a0 mm/mempolicy.c:2581 vm_area_alloc_pages mm/vmalloc.c:3667 [inline] __vmalloc_area_node mm/vmalloc.c:3892 [inline] __vmalloc_node_range_noprof+0x795/0x1730 mm/vmalloc.c:4082 __vmalloc_node_noprof+0xc2/0x100 mm/vmalloc.c:4143 alloc_thread_stack_node kernel/fork.c:359 [inline] dup_task_struct+0x28e/0x850 kernel/fork.c:929 copy_process+0x81b/0x42e0 kernel/fork.c:2110 kernel_clone+0x2d7/0x940 kernel/fork.c:2746 __do_sys_clone kernel/fork.c:2887 [inline] __se_sys_clone kernel/fork.c:2871 [inline] __x64_sys_clone+0x1b6/0x230 kernel/fork.c:2871 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 27224 tgid 27224 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] __free_frozen_pages+0xc1f/0xd10 mm/page_alloc.c:2950 __slab_free+0x274/0x2c0 mm/slub.c:5672 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4610 [inline] slab_alloc_node mm/slub.c:4939 [inline] __do_kmalloc_node mm/slub.c:5333 [inline] __kmalloc_noprof+0x312/0x750 mm/slub.c:5347 _kmalloc_noprof include/linux/slab.h:973 [inline] tomoyo_realpath_from_path+0xef/0x640 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x229/0x470 security/tomoyo/file.c:776 security_file_open+0xa9/0x240 security/security.c:2739 do_dentry_open+0x4a0/0x1380 fs/open.c:924 vfs_open+0x3b/0x340 fs/open.c:1079 do_open fs/namei.c:4700 [inline] path_openat+0x2e44/0x3830 fs/namei.c:4859 do_file_open+0x23e/0x4a0 fs/namei.c:4888 do_sys_openat2+0x115/0x200 fs/open.c:1395 do_sys_open fs/open.c:1401 [inline] __do_sys_openat fs/open.c:1417 [inline] __se_sys_openat fs/open.c:1412 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1412 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 Memory state around the buggy address: ffffc900061a7800: 00 00 00 00 00 f2 f2 f2 f2 f2 00 00 00 00 00 00 ffffc900061a7880: 00 f2 f2 f2 f2 f2 00 f2 f2 f2 00 00 00 00 00 00 >ffffc900061a7900: 00 f2 f2 f2 f2 f2 00 00 00 f3 f3 f3 f3 f3 f3 f3 ^ ffffc900061a7980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc900061a7a00: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 ================================================================== --- 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