================================================================== BUG: KASAN: use-after-free in cleancache_fs_enabled_mapping include/linux/cleancache.h:56 [inline] BUG: KASAN: use-after-free in cleancache_invalidate_page include/linux/cleancache.h:110 [inline] BUG: KASAN: use-after-free in unaccount_page_cache_page+0x6d8/0x750 mm/filemap.c:163 Read of size 4 at addr ffff888118d73470 by task syz-executor.3/21584 CPU: 0 PID: 21584 Comm: syz-executor.3 Tainted: G W 5.15.106-syzkaller-00249-g19c0ed55a470 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:444 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308 cleancache_fs_enabled_mapping include/linux/cleancache.h:56 [inline] cleancache_invalidate_page include/linux/cleancache.h:110 [inline] unaccount_page_cache_page+0x6d8/0x750 mm/filemap.c:163 __delete_from_page_cache+0xc6/0x5b0 mm/filemap.c:231 __remove_mapping+0x566/0x690 mm/vmscan.c:1197 shrink_page_list+0x25f1/0x5820 mm/vmscan.c:1789 shrink_inactive_list mm/vmscan.c:2261 [inline] shrink_list mm/vmscan.c:2506 [inline] shrink_lruvec+0x17e9/0x4340 mm/vmscan.c:5694 shrink_node_memcgs mm/vmscan.c:5886 [inline] shrink_node+0x1077/0x24e0 mm/vmscan.c:5916 shrink_zones mm/vmscan.c:6119 [inline] do_try_to_free_pages+0x5b6/0x1570 mm/vmscan.c:6177 try_to_free_mem_cgroup_pages+0x36c/0x850 mm/vmscan.c:6491 memory_high_write+0x243/0x3b0 mm/memcontrol.c:6382 cgroup_file_write+0x290/0x590 kernel/cgroup/cgroup.c:3943 kernfs_fop_write_iter+0x2c4/0x410 fs/kernfs/file.c:296 call_write_iter include/linux/fs.h:2159 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0xd8a/0x1160 fs/read_write.c:594 ksys_write+0x199/0x2c0 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:656 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f1581d1b169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1580a6d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f1581e3b050 RCX: 00007f1581d1b169 RDX: 0000000000000012 RSI: 0000000020000300 RDI: 0000000000000007 RBP: 00007f1581d76ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff4f9803df R14: 00007f1580a6d300 R15: 0000000000022000 Allocated by task 21092: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] ____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:512 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc+0x13a/0x270 mm/slub.c:4425 kmalloc include/linux/slab.h:613 [inline] kzalloc include/linux/slab.h:738 [inline] __register_sysctl_table+0xea/0x1240 fs/proc/proc_sysctl.c:1321 register_net_sysctl+0x21e/0x230 net/sysctl_net.c:169 __devinet_sysctl_register+0x1d3/0x2a0 net/ipv4/devinet.c:2577 devinet_init_net+0x32d/0x5d0 net/ipv4/devinet.c:2700 ops_init+0x1cf/0x4a0 net/core/net_namespace.c:135 setup_net+0x34b/0xb50 net/core/net_namespace.c:329 copy_net_ns+0x381/0x5f0 net/core/net_namespace.c:473 create_new_namespaces+0x416/0x670 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x126/0x180 kernel/nsproxy.c:226 ksys_unshare+0x542/0xa00 kernel/fork.c:3161 __do_sys_unshare kernel/fork.c:3235 [inline] __se_sys_unshare kernel/fork.c:3233 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3233 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Freed by task 60: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749 slab_free mm/slub.c:3517 [inline] kmem_cache_free_bulk+0x552/0x700 mm/slub.c:3658 kfree_bulk include/linux/slab.h:465 [inline] kfree_rcu_work+0x2b2/0x6a0 kernel/rcu/tree.c:3281 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2313 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2460 kthread+0x421/0x510 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 kvfree_call_rcu+0xb2/0x7d0 kernel/rcu/tree.c:3559 drop_sysctl_table+0x311/0x450 fs/proc/proc_sysctl.c:1682 unregister_sysctl_table+0x7b/0x120 fs/proc/proc_sysctl.c:1720 unregister_net_sysctl_table+0x15/0x20 net/sysctl_net.c:175 __devinet_sysctl_unregister net/ipv4/devinet.c:2600 [inline] devinet_exit_net+0x1a8/0x230 net/ipv4/devinet.c:2745 ops_exit_list net/core/net_namespace.c:169 [inline] cleanup_net+0x64b/0xc00 net/core/net_namespace.c:596 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2313 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2460 kthread+0x421/0x510 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 insert_work+0x56/0x320 kernel/workqueue.c:1369 __queue_work+0x923/0xcd0 kernel/workqueue.c:1535 queue_work_on+0x105/0x170 kernel/workqueue.c:1562 queue_work include/linux/workqueue.h:507 [inline] schedule_work include/linux/workqueue.h:568 [inline] destroy_super_rcu+0xd1/0xe0 fs/super.c:172 rcu_do_batch+0x57a/0xc10 kernel/rcu/tree.c:2509 rcu_core+0x517/0x1020 kernel/rcu/tree.c:2749 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2762 __do_softirq+0x26d/0x5bf kernel/softirq.c:565 The buggy address belongs to the object at ffff888118d73000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1136 bytes inside of 2048-byte region [ffff888118d73000, ffff888118d73800) The buggy address belongs to the page: page:ffffea0004635c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x118d70 head:ffffea0004635c00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043200 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 11900, ts 900919082021, free_ts 900588396291 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2502 prep_new_page mm/page_alloc.c:2508 [inline] get_page_from_freelist+0x2c14/0x2cf0 mm/page_alloc.c:4291 __alloc_pages+0x386/0x7b0 mm/page_alloc.c:5569 allocate_slab mm/slub.c:1930 [inline] new_slab+0x92/0x490 mm/slub.c:1993 ___slab_alloc+0x39e/0x830 mm/slub.c:3026 __slab_alloc+0x4a/0x90 mm/slub.c:3113 slab_alloc_node mm/slub.c:3204 [inline] slab_alloc mm/slub.c:3246 [inline] __kmalloc_track_caller+0x16c/0x260 mm/slub.c:4943 kmalloc_reserve net/core/skbuff.c:357 [inline] pskb_expand_head+0x113/0x1240 net/core/skbuff.c:1727 netlink_trim+0x19b/0x230 net/netlink/af_netlink.c:1312 netlink_broadcast_filtered+0x66/0x1220 net/netlink/af_netlink.c:1517 netlink_broadcast net/netlink/af_netlink.c:1562 [inline] nlmsg_multicast include/net/netlink.h:1033 [inline] nlmsg_notify+0x101/0x1c0 net/netlink/af_netlink.c:2576 rtnl_notify net/core/rtnetlink.c:730 [inline] rtmsg_ifinfo_send net/core/rtnetlink.c:3848 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:3863 [inline] rtmsg_ifinfo+0xe7/0x120 net/core/rtnetlink.c:3869 __dev_notify_flags+0xdd/0x610 net/core/dev.c:8824 rtnl_configure_link+0x221/0x320 veth_newlink+0x808/0xe30 drivers/net/veth.c:1714 __rtnl_newlink net/core/rtnetlink.c:3462 [inline] rtnl_newlink+0x146e/0x2040 net/core/rtnetlink.c:3510 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1370 [inline] free_pcp_prepare mm/page_alloc.c:1442 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3441 free_unref_page+0xac/0x2c0 mm/page_alloc.c:3521 free_the_page mm/page_alloc.c:711 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5645 __free_slab+0xec/0x1d0 mm/slub.c:2018 free_slab mm/slub.c:2033 [inline] discard_slab mm/slub.c:2039 [inline] __unfreeze_partials+0x165/0x1a0 mm/slub.c:2525 put_cpu_partial+0xc4/0x120 mm/slub.c:2605 __slab_free+0x1c8/0x290 mm/slub.c:3386 do_slab_free mm/slub.c:3505 [inline] ___cache_free+0x109/0x120 mm/slub.c:3524 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550 slab_alloc_node mm/slub.c:3238 [inline] slab_alloc mm/slub.c:3246 [inline] kmem_cache_alloc+0xf5/0x200 mm/slub.c:3251 getname_flags+0xba/0x520 fs/namei.c:138 getname+0x19/0x20 fs/namei.c:217 Memory state around the buggy address: ffff888118d73300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888118d73380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888118d73400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888118d73480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888118d73500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================