From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 609612AEE4 for ; Mon, 30 Dec 2024 11:49:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735559346; cv=none; b=MTYcutVOa2p1deeNQWsOwSdpbjHYVZEkY6xteUtP8pEixyqTK4l5onowMPq6pIpgD/uT8vlvbqNyJy79FBuYuf8tcwo7005Q9NqFpQkOTKdRBpzOEclXL54RUVuFGW5zzCR22eMFuoJy18wrIgzFv7MAdrJJwLA7zDvRbSek6zU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735559346; c=relaxed/simple; bh=f+X7qTikf0BNQlnh2rkLkygreC4r8LEy0+I0MFwi0DU=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=UHvrh0BHkr/XoEXwWZXTkOmA2p0B0zcok+qAHzqXoI2kQQQgIoKjXl6lkhfDV+LIq9aYjhYBu5x4wTSLVhl4rYZrdfIQARAJie2rAZMvlc39oQmlQxiqF5SfJg2fqanT+fFCe99sKNwaycbKzMkBlkSU5jSNnkl+L6nNc+OQnco= 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=209.85.166.200 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-f200.google.com with SMTP id e9e14a558f8ab-3a9d3e48637so89848855ab.1 for ; Mon, 30 Dec 2024 03:49:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1735559343; x=1736164143; 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=4lLFfY98m6B8b+oBIXb9co6vUZ5aW9sPdoT6AAWsedY=; b=AeZA3zr2EYhpU/jPsSGCPwKVjevP9oL+E9XBlZsYZ0UvpdaquAgB/DSo+N2Afqbu2G x+Z9UviidwK3J4NOX1zJZ3ZWDfXQlD6LXZC4SkOKZqgNzyhMAXXiZQk5wWeFLbZ8Gbo9 Zxn1Z9uiZkE7UcSwUiXQXHyoFqVOb7gipfnhX3/iznvlpBuDrUaaLaXUR90I77M3FJIS Tv9SbVqtFzqfhQMD4NKRo1sTL7o/GPb5jfK52fNpDlhSayKZGlIxUH1pcLEHAguLtSfh k7Oc9XPti1qIRR0UpY5bvanFsIY4DCmMhA7PQjzPGxFYUVA2I3kHDnbIhCjX0wXeJKmp IjkA== X-Forwarded-Encrypted: i=1; AJvYcCVGvuqxbyZoOzE9o0elkIndcyX4q0WwLcdv4RMkAz+X9Rnpvnjq8D62BTNdQrO1moA1HnqCS8R+qy4sl3w=@vger.kernel.org X-Gm-Message-State: AOJu0YwLehPOG2VXCxysMqVp+Es3LuJwIy2kAIWr8sqicnGuqQ4RLLrV AbO3k7wdMKO7mzv1pKZDVwDFwXmhQsIGNtNCuix5i/LRqcGjnef8ANB2xklKYLaGoPenB3fD4Bl +VDhsYCYP2UUgkdRGCgrkAtI3n+uQjOjkxXai8zGf00rpsIXWNAuCa9I= X-Google-Smtp-Source: AGHT+IFjNhqZdqFn5wQLL9HFmxtSWBjD/pr1/NQF106DS290Ioxizr3I/D2TqPPIjQtJEjrnoztGtXXf7aAzbumBTy9+bTxOMZLx Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:194a:b0:3a7:7124:bd2b with SMTP id e9e14a558f8ab-3c2d514f8e4mr301178055ab.15.1735559343543; Mon, 30 Dec 2024 03:49:03 -0800 (PST) Date: Mon, 30 Dec 2024 03:49:03 -0800 In-Reply-To: <20241230111734.691-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <677288af.050a0220.226966.00d4.GAE@google.com> Subject: Re: [syzbot] [mm?] WARNING in __folio_rmap_sanity_checks (2) From: syzbot To: hdanton@sina.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Read in filemap_map_pages ================================================================== BUG: KASAN: slab-use-after-free in ptep_get include/linux/pgtable.h:338 [inline] BUG: KASAN: slab-use-after-free in filemap_map_folio_range mm/filemap.c:3632 [inline] BUG: KASAN: slab-use-after-free in filemap_map_pages+0xdba/0x1ab0 mm/filemap.c:3753 Read of size 8 at addr ffff888063e5c000 by task syz.0.22/6900 CPU: 0 UID: 0 PID: 6900 Comm: syz.0.22 Not tainted 6.13.0-rc3-next-20241220-syzkaller-05236-g8155b4ef3466-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 ptep_get include/linux/pgtable.h:338 [inline] filemap_map_folio_range mm/filemap.c:3632 [inline] filemap_map_pages+0xdba/0x1ab0 mm/filemap.c:3753 do_fault_around mm/memory.c:5351 [inline] do_read_fault mm/memory.c:5384 [inline] do_fault mm/memory.c:5527 [inline] do_pte_missing mm/memory.c:4048 [inline] handle_pte_fault+0x3888/0x5ee0 mm/memory.c:5890 __handle_mm_fault mm/memory.c:6033 [inline] handle_mm_fault+0x11f5/0x1d50 mm/memory.c:6202 faultin_page mm/gup.c:1196 [inline] __get_user_pages+0x1a92/0x4140 mm/gup.c:1491 populate_vma_page_range+0x264/0x330 mm/gup.c:1929 __mm_populate+0x27a/0x460 mm/gup.c:2032 mm_populate include/linux/mm.h:3400 [inline] vm_mmap_pgoff+0x303/0x430 mm/util.c:585 ksys_mmap_pgoff+0x4eb/0x720 mm/mmap.c:607 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe194b85d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe195969038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fe194d76080 RCX: 00007fe194b85d29 RDX: 0000000000000002 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 00007fe194c01b08 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe194d76080 R15: 00007ffe2c0aa718 Allocated by task 25: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171 dst_alloc+0x12b/0x190 net/core/dst.c:89 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x77/0x420 net/ipv6/route.c:3275 mld_sendpack+0x6a3/0xdb0 net/ipv6/mcast.c:1849 mld_send_cr net/ipv6/mcast.c:2161 [inline] mld_ifc_work+0x7d9/0xd90 net/ipv6/mcast.c:2695 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Freed by task 35: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 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:4609 [inline] kmem_cache_free+0x195/0x410 mm/slub.c:4711 dst_destroy+0x249/0x360 net/core/dst.c:121 rcu_do_batch kernel/rcu/tree.c:2546 [inline] rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2802 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xaa/0xc0 mm/kasan/generic.c:548 __call_rcu_common kernel/rcu/tree.c:3065 [inline] call_rcu+0x168/0xac0 kernel/rcu/tree.c:3172 refdst_drop include/net/dst.h:263 [inline] skb_dst_drop include/net/dst.h:275 [inline] __dev_queue_xmit+0x87b/0x3f50 net/core/dev.c:4389 neigh_output include/net/neighbour.h:539 [inline] ip6_finish_output2+0x12ad/0x1780 net/ipv6/ip6_output.c:141 ip6_finish_output+0x41e/0x840 net/ipv6/ip6_output.c:226 NF_HOOK+0x9e/0x430 include/linux/netfilter.h:314 mld_sendpack+0x843/0xdb0 net/ipv6/mcast.c:1860 mld_send_cr net/ipv6/mcast.c:2161 [inline] mld_ifc_work+0x7d9/0xd90 net/ipv6/mcast.c:2695 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The buggy address belongs to the object at ffff888063e5c000 which belongs to the cache ip6_dst_cache of size 232 The buggy address is located 0 bytes inside of freed 232-byte region [ffff888063e5c000, ffff888063e5c0e8) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x63e5c memcg:ffff888063f79c01 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88814ca24500 dead000000000122 0000000000000000 raw: 0000000000000000 00000000000c000c 00000000f5000000 ffff888063f79c01 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 25, tgid 25 (kworker/1:0), ts 121780402212, free_ts 107625052788 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4754 alloc_pages_mpol+0x30e/0x550 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2587 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4171 dst_alloc+0x12b/0x190 net/core/dst.c:89 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x77/0x420 net/ipv6/route.c:3275 mld_sendpack+0x6a3/0xdb0 net/ipv6/mcast.c:1849 mld_send_cr net/ipv6/mcast.c:2161 [inline] mld_ifc_work+0x7d9/0xd90 net/ipv6/mcast.c:2695 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 page last free pid 6533 tgid 6533 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660 vfree+0x1c3/0x360 mm/vmalloc.c:3383 kcov_put kernel/kcov.c:439 [inline] kcov_close+0x28/0x50 kernel/kcov.c:535 __fput+0x3e9/0x9f0 fs/file_table.c:450 task_work_run+0x24f/0x310 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xa2f/0x28e0 kernel/exit.c:938 do_group_exit+0x207/0x2c0 kernel/exit.c:1087 get_signal+0x16b2/0x1750 kernel/signal.c:3017 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888063e5bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888063e5bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888063e5c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888063e5c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ffff888063e5c100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ================================================================== Tested on: commit: 8155b4ef Add linux-next specific files for 20241220 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1454550f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=9c90bb7161a56c88 dashboard link: https://syzkaller.appspot.com/bug?extid=c0673e1f1f054fac28c2 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=142ef0b0580000