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AJvYcCXUUDv9fgAq97LM53ooLI+GrQAXTmBrpG7cy8k5VAJCFC3Kx+ozEayRij2nDRMbflENPZrLQclyAg==@kvack.org X-Gm-Message-State: AOJu0YyKDesN+rDLjRZ0agdzNRt2fcsRWo4HC3pCLFXSgy2svQSNKdTh n0ZXOE1k4/oTxkaQ065D8DBN1ZvADBzku3/WPosk1nrGJ0zdziwM5nCtC/tSJW5R/P1RGP44P9D Ke9gXwFm7mMCPWTMzjslFECSUyZIPjLB0RCBxifDzFBPxzmHMuu8aoRA= X-Google-Smtp-Source: AGHT+IFhcbCfa//QcD1vJeInxFkUdK71WUzLPVb6ilqCshdipxSwtYM02hDNJx+tDSRFnGjW2TnpI100XJcq9WvIT8eoad5uufvl MIME-Version: 1.0 X-Received: by 2002:a05:6e02:18cd:b0:3a7:e047:733f with SMTP id e9e14a558f8ab-3aff4613b80mr45849745ab.1.1734106705774; Fri, 13 Dec 2024 08:18:25 -0800 (PST) Date: Fri, 13 Dec 2024 08:18:25 -0800 In-Reply-To: <67453555.050a0220.21d33d.0008.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <675c5e51.050a0220.2875e5.0049.GAE@google.com> Subject: Re: [syzbot] [mm?] KASAN: slab-use-after-free Read in folio_evictable (3) From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 8E43CC001D X-Stat-Signature: 7rpjwigpk35kd1mw4xjk3g6fzpxmeu8a X-Rspam-User: X-Rspamd-Server: rspam09 X-HE-Tag: 1734106695-725249 X-HE-Meta: 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 WFnh2gJe nZk76Qg0X/QWaO1eaIHREtNatHoMVWGm9GgQS699zA1qJdj46c0c9vj7erxA2yQDrkm7anTgKDHOQE0+cLGaYkXZ7p+wGm7jd+22qUzzRwNd84vAtvyKnm7MAmZX/uyWCWEK4ttI3QywnrTdTU0pZulum1UJwX7sL+2UWFMjwOEXS8GjqHQK7FtiWXBXtBFhf3CLMaXnUiAk8+Tzi9beg6Ed8BKYWtyw X-Bogosity: Ham, tests=bogofilter, spamicity=0.077697, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: syzbot has found a reproducer for the following issue on: HEAD commit: f932fb9b4074 Merge tag 'v6.13-rc2-ksmbd-server-fixes' of g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=101e24f8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=fee25f93665c89ac dashboard link: https://syzkaller.appspot.com/bug?extid=4c7590f1cee06597e43a compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14654730580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-f932fb9b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1982926f01cf/vmlinux-f932fb9b.xz kernel image: https://storage.googleapis.com/syzbot-assets/56ef2ef1e465/bzImage-f932fb9b.xz mounted in repro #1: https://storage.googleapis.com/syzbot-assets/7e9b5cd91eeb/mount_0.gz mounted in repro #2: https://storage.googleapis.com/syzbot-assets/87ff98e190e4/mount_1.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4c7590f1cee06597e43a@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline] BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] BUG: KASAN: slab-use-after-free in mapping_unevictable include/linux/pagemap.h:269 [inline] BUG: KASAN: slab-use-after-free in folio_evictable+0xe3/0x250 mm/internal.h:435 Read of size 8 at addr ffff88804e4813a0 by task kswapd1/81 CPU: 0 UID: 0 PID: 81 Comm: kswapd1 Not tainted 6.13.0-rc2-syzkaller-00159-gf932fb9b4074 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 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 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] mapping_unevictable include/linux/pagemap.h:269 [inline] folio_evictable+0xe3/0x250 mm/internal.h:435 sort_folio mm/vmscan.c:4299 [inline] scan_folios mm/vmscan.c:4424 [inline] isolate_folios mm/vmscan.c:4550 [inline] evict_folios+0xff2/0x5800 mm/vmscan.c:4581 try_to_shrink_lruvec+0x9a6/0xc70 mm/vmscan.c:4789 shrink_one+0x3b9/0x850 mm/vmscan.c:4834 shrink_many mm/vmscan.c:4897 [inline] lru_gen_shrink_node mm/vmscan.c:4975 [inline] shrink_node+0x37c5/0x3e50 mm/vmscan.c:5956 kswapd_shrink_node mm/vmscan.c:6785 [inline] balance_pgdat mm/vmscan.c:6977 [inline] kswapd+0x1ca9/0x36f0 mm/vmscan.c:7246 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 5580: 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:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4160 gfs2_glock_get+0x309/0x1010 fs/gfs2/glock.c:1178 gfs2_inode_lookup+0x2a3/0xc90 fs/gfs2/inode.c:135 gfs2_dir_search+0x229/0x2f0 fs/gfs2/dir.c:1667 gfs2_lookupi+0x461/0x5e0 fs/gfs2/inode.c:340 gfs2_jindex_hold fs/gfs2/ops_fstype.c:587 [inline] init_journal+0x5fa/0x2410 fs/gfs2/ops_fstype.c:729 init_inodes+0xdc/0x320 fs/gfs2/ops_fstype.c:864 gfs2_fill_super+0x1bd1/0x24d0 fs/gfs2/ops_fstype.c:1249 get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636 gfs2_get_tree+0x54/0x220 fs/gfs2/ops_fstype.c:1330 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 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 Freed by task 16: 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:582 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:2338 [inline] slab_free mm/slub.c:4598 [inline] kmem_cache_free+0x195/0x410 mm/slub.c:4700 rcu_do_batch kernel/rcu/tree.c:2567 [inline] rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2823 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 run_ksoftirqd+0xca/0x130 kernel/softirq.c:950 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:544 __call_rcu_common kernel/rcu/tree.c:3086 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3190 __gfs2_glock_free+0xda0/0xef0 fs/gfs2/glock.c:172 gfs2_glock_free+0x3c/0xb0 fs/gfs2/glock.c:178 gfs2_glock_put_eventually fs/gfs2/super.c:1257 [inline] gfs2_evict_inode+0x6e2/0x13c0 fs/gfs2/super.c:1546 evict+0x4e8/0x9a0 fs/inode.c:796 gfs2_jindex_free+0x3f6/0x4b0 fs/gfs2/super.c:79 init_journal+0x9fb/0x2410 fs/gfs2/ops_fstype.c:846 init_inodes+0xdc/0x320 fs/gfs2/ops_fstype.c:864 gfs2_fill_super+0x1bd1/0x24d0 fs/gfs2/ops_fstype.c:1249 get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636 gfs2_get_tree+0x54/0x220 fs/gfs2/ops_fstype.c:1330 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 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 Second to last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:544 insert_work+0x3e/0x330 kernel/workqueue.c:2183 __queue_work+0xc8b/0xf50 kernel/workqueue.c:2339 queue_delayed_work_on+0x1ca/0x390 kernel/workqueue.c:2552 queue_delayed_work include/linux/workqueue.h:677 [inline] gfs2_glock_queue_work fs/gfs2/glock.c:250 [inline] do_xmote+0xaf8/0x1250 fs/gfs2/glock.c:832 glock_work_func+0x343/0x5c0 fs/gfs2/glock.c:1090 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+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The buggy address belongs to the object at ffff88804e480fd8 which belongs to the cache gfs2_glock(aspace) of size 1224 The buggy address is located 968 bytes inside of freed 1224-byte region [ffff88804e480fd8, ffff88804e4814a0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4e480 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff88801fa3d000 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800c000c 00000001f5000000 0000000000000000 head: 04fff00000000040 ffff88801fa3d000 dead000000000122 0000000000000000 head: 0000000000000000 00000000800c000c 00000001f5000000 0000000000000000 head: 04fff00000000002 ffffea0001392001 ffffffffffffffff 0000000000000000 head: 0000000700000004 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 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5580, tgid 5580 (syz.0.16), ts 92534711834, free_ts 92373479633 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3474 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269 alloc_slab_page+0x6a/0x110 mm/slub.c:2408 allocate_slab+0x5a/0x2b0 mm/slub.c:2574 new_slab mm/slub.c:2627 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3815 __slab_alloc+0x58/0xa0 mm/slub.c:3905 __slab_alloc_node mm/slub.c:3980 [inline] slab_alloc_node mm/slub.c:4141 [inline] kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4160 gfs2_glock_get+0x309/0x1010 fs/gfs2/glock.c:1178 gfs2_inode_lookup+0x2a3/0xc90 fs/gfs2/inode.c:135 gfs2_lookup_root fs/gfs2/ops_fstype.c:440 [inline] init_sb+0xa2a/0x1270 fs/gfs2/ops_fstype.c:507 gfs2_fill_super+0x19b3/0x24d0 fs/gfs2/ops_fstype.c:1216 get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636 gfs2_get_tree+0x54/0x220 fs/gfs2/ops_fstype.c:1330 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 page last free pid 52 tgid 52 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0xd3f/0x1010 mm/page_alloc.c:2657 discard_slab mm/slub.c:2673 [inline] __put_partials+0x160/0x1c0 mm/slub.c:3142 put_cpu_partial+0x17c/0x250 mm/slub.c:3217 __slab_free+0x290/0x380 mm/slub.c:4468 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] kmem_cache_alloc_node_noprof+0x1d9/0x380 mm/slub.c:4205 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:668 alloc_skb include/linux/skbuff.h:1323 [inline] alloc_skb_with_frags+0xc3/0x820 net/core/skbuff.c:6612 sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2881 sock_alloc_send_skb include/net/sock.h:1797 [inline] mld_newpack+0x1c3/0xaf0 net/ipv6/mcast.c:1747 add_grhead net/ipv6/mcast.c:1850 [inline] add_grec+0x1492/0x19a0 net/ipv6/mcast.c:1988 mld_send_cr net/ipv6/mcast.c:2114 [inline] mld_ifc_work+0x691/0xd90 net/ipv6/mcast.c:2651 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 Memory state around the buggy address: ffff88804e481280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804e481300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88804e481380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804e481400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804e481480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- 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.