================================================================== BUG: KASAN: slab-out-of-bounds in cleancache_fs_enabled_mapping include/linux/cleancache.h:56 [inline] BUG: KASAN: slab-out-of-bounds in cleancache_invalidate_page include/linux/cleancache.h:110 [inline] BUG: KASAN: slab-out-of-bounds in unaccount_page_cache_page+0x99f/0xa80 mm/filemap.c:175 Read of size 4 at addr ffff88810d21a470 by task syz.3.16267/21666 CPU: 1 PID: 21666 Comm: syz.3.16267 Tainted: G W 5.10.234-syzkaller-00033-g094fc3778d6b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:452 __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+0x99f/0xa80 mm/filemap.c:175 __delete_from_page_cache+0xd0/0x5d0 mm/filemap.c:243 __remove_mapping+0x567/0x690 mm/vmscan.c:985 shrink_page_list+0x1f38/0x4c60 mm/vmscan.c:1498 shrink_inactive_list+0x591/0x1150 mm/vmscan.c:2075 shrink_list mm/vmscan.c:2294 [inline] shrink_lruvec+0xced/0x3860 mm/vmscan.c:5473 shrink_node_memcgs mm/vmscan.c:5660 [inline] shrink_node+0xded/0x2000 mm/vmscan.c:5690 shrink_zones mm/vmscan.c:5896 [inline] do_try_to_free_pages+0x652/0x1630 mm/vmscan.c:5954 try_to_free_mem_cgroup_pages+0x369/0x830 mm/vmscan.c:6272 try_charge+0x4b8/0x15f0 mm/memcontrol.c:2742 __mem_cgroup_charge+0x147/0x6e0 mm/memcontrol.c:6868 mem_cgroup_charge include/linux/memcontrol.h:458 [inline] shmem_add_to_page_cache+0x6a9/0x10c0 mm/shmem.c:699 shmem_getpage_gfp+0xa65/0x2480 mm/shmem.c:1952 shmem_getpage mm/shmem.c:161 [inline] shmem_write_begin+0xca/0x1b0 mm/shmem.c:2497 generic_perform_write+0x2cd/0x570 mm/filemap.c:3509 __generic_file_write_iter+0x23c/0x560 mm/filemap.c:3638 generic_file_write_iter+0xaf/0x1c0 mm/filemap.c:3670 call_write_iter include/linux/fs.h:2058 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0xb4c/0xe70 fs/read_write.c:605 ksys_write+0x199/0x2c0 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:667 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:-1 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f929b4f2c1f Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48 RSP: 002b:00007f9299b5ddf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000004000000 RCX: 00007f929b4f2c1f RDX: 0000000004000000 RSI: 00007f929171d000 RDI: 000000000000000a RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000010229 R10: 0000000000000002 R11: 0000000000000293 R12: 000000000000000a R13: 00007f9299b5def0 R14: 00007f9299b5deb0 R15: 00007f929171d000 Allocated by task 21570: 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:430 [inline] ____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:509 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:518 kasan_kmalloc include/linux/kasan.h:254 [inline] __kmalloc+0x1aa/0x330 mm/slub.c:4033 __kmalloc_node include/linux/slab.h:418 [inline] kmalloc_node include/linux/slab.h:575 [inline] kvmalloc_node+0x82/0x130 mm/util.c:612 kvmalloc include/linux/mm.h:822 [inline] kvmalloc_array include/linux/mm.h:840 [inline] __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:471 [inline] ptr_ring_init include/linux/ptr_ring.h:489 [inline] skb_array_init include/linux/skb_array.h:182 [inline] pfifo_fast_init+0x3aa/0x7a0 net/sched/sch_generic.c:779 qdisc_create_dflt+0x138/0x3d0 net/sched/sch_generic.c:931 mq_init+0x2c8/0x6b0 net/sched/sch_mq.c:90 qdisc_create_dflt+0x138/0x3d0 net/sched/sch_generic.c:931 attach_default_qdiscs net/sched/sch_generic.c:1110 [inline] dev_activate+0x123/0x1310 net/sched/sch_generic.c:1164 __dev_open+0x3bf/0x4e0 net/core/dev.c:1551 __dev_change_flags+0x1db/0x6e0 net/core/dev.c:8533 dev_change_flags+0x8c/0x1a0 net/core/dev.c:8604 dev_ifsioc+0x115/0xae0 net/core/dev_ioctl.c:230 dev_ioctl+0x526/0xb40 net/core/dev_ioctl.c:481 sock_do_ioctl+0x295/0x3a0 net/socket.c:1090 sock_ioctl+0x4a6/0x760 net/socket.c:1207 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0x114/0x190 fs/ioctl.c:739 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:-1 entry_SYSCALL_64_after_hwframe+0x61/0xcb Freed by task 21569: 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+0x121/0x160 mm/kasan/common.c:362 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370 kasan_slab_free include/linux/kasan.h:220 [inline] slab_free_hook mm/slub.c:1595 [inline] slab_free_freelist_hook+0xc0/0x190 mm/slub.c:1621 slab_free mm/slub.c:3203 [inline] kfree+0xc3/0x270 mm/slub.c:4191 kvfree+0x35/0x40 mm/util.c:647 ptr_ring_cleanup include/linux/ptr_ring.h:671 [inline] pfifo_fast_destroy+0xbf/0xd0 net/sched/sch_generic.c:805 qdisc_destroy+0x9d/0x260 net/sched/sch_generic.c:999 qdisc_put net/sched/sch_generic.c:1018 [inline] shutdown_scheduler_queue net/sched/sch_generic.c:1071 [inline] netdev_for_each_tx_queue include/linux/netdevice.h:2321 [inline] dev_shutdown+0x192/0x560 net/sched/sch_generic.c:1378 unregister_netdevice_many+0x98c/0x17d0 net/core/dev.c:10759 unregister_netdevice_queue+0x2e6/0x350 net/core/dev.c:10700 unregister_netdevice include/linux/netdevice.h:2931 [inline] __tun_detach+0xd14/0x1510 drivers/net/tun.c:697 tun_detach drivers/net/tun.c:713 [inline] tun_chr_close+0x92/0x140 drivers/net/tun.c:3486 __fput+0x33d/0x7b0 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x129/0x190 kernel/task_work.c:189 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xbf/0xd0 kernel/entry/common.c:172 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline] syscall_exit_to_user_mode+0xa2/0x1a0 kernel/entry/common.c:274 do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff88810d218000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 1136 bytes to the right of 8192-byte region [ffff88810d218000, ffff88810d21a000) The buggy address belongs to the page: page:ffffea0004348600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10d218 head:ffffea0004348600 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042a80 raw: 0000000000000000 0000000000020002 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 21570, ts 2709710831423, free_ts 2705427528317 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2456 [inline] prep_new_page+0x166/0x180 mm/page_alloc.c:2462 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1808 [inline] new_slab+0x80/0x400 mm/slub.c:1869 new_slab_objects mm/slub.c:2627 [inline] ___slab_alloc+0x302/0x4b0 mm/slub.c:2791 __slab_alloc+0x63/0xa0 mm/slub.c:2831 slab_alloc_node mm/slub.c:2913 [inline] slab_alloc mm/slub.c:2955 [inline] __kmalloc+0x204/0x330 mm/slub.c:4029 __kmalloc_node include/linux/slab.h:418 [inline] kmalloc_node include/linux/slab.h:575 [inline] kvmalloc_node+0x82/0x130 mm/util.c:612 kvmalloc include/linux/mm.h:822 [inline] kvmalloc_array include/linux/mm.h:840 [inline] __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:471 [inline] ptr_ring_init include/linux/ptr_ring.h:489 [inline] skb_array_init include/linux/skb_array.h:182 [inline] pfifo_fast_init+0x3aa/0x7a0 net/sched/sch_generic.c:779 qdisc_create_dflt+0x138/0x3d0 net/sched/sch_generic.c:931 mq_init+0x2c8/0x6b0 net/sched/sch_mq.c:90 qdisc_create_dflt+0x138/0x3d0 net/sched/sch_generic.c:931 attach_default_qdiscs net/sched/sch_generic.c:1110 [inline] dev_activate+0x123/0x1310 net/sched/sch_generic.c:1164 __dev_open+0x3bf/0x4e0 net/core/dev.c:1551 __dev_change_flags+0x1db/0x6e0 net/core/dev.c:8533 dev_change_flags+0x8c/0x1a0 net/core/dev.c:8604 page last free stack trace: reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1349 [inline] __free_pages_ok+0x82c/0x850 mm/page_alloc.c:1629 free_the_page+0x76/0x370 mm/page_alloc.c:5409 __free_pages+0x67/0xc0 mm/page_alloc.c:5418 __free_slab+0xcf/0x190 mm/slub.c:1894 free_slab mm/slub.c:1909 [inline] discard_slab+0x29/0x40 mm/slub.c:1915 __slab_free+0x30d/0x3a0 mm/slub.c:3131 do_slab_free mm/slub.c:3191 [inline] ___cache_free+0x111/0x130 mm/slub.c:3210 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x47/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440 kasan_slab_alloc include/linux/kasan.h:244 [inline] slab_post_alloc_hook+0x61/0x2f0 mm/slab.h:583 slab_alloc_node mm/slub.c:2947 [inline] slab_alloc mm/slub.c:2955 [inline] kmem_cache_alloc+0x168/0x2e0 mm/slub.c:2960 sk_prot_alloc+0x5f/0x370 net/core/sock.c:1710 sk_alloc+0x38/0x4d0 net/core/sock.c:1774 unix_create1+0x91/0x5f0 net/unix/af_unix.c:797 Memory state around the buggy address: ffff88810d21a300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88810d21a380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88810d21a400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88810d21a480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88810d21a500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================