================================================================== 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+0x99f/0xa80 mm/filemap.c:175 Read of size 4 at addr ffff8881333a8470 by task syz.7.2818/11369 CPU: 0 PID: 11369 Comm: syz.7.2818 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 __kernel_write+0x5ab/0x9d0 fs/read_write.c:550 dump_emit+0x261/0x3a0 fs/coredump.c:849 dump_user_range+0x71/0x1a0 fs/coredump.c:902 elf_core_dump+0x33bd/0x3c10 fs/binfmt_elf.c:2290 do_coredump+0x1eb8/0x2d60 fs/coredump.c:811 get_signal+0x102c/0x1410 kernel/signal.c:2779 arch_do_signal_or_restart+0xbd/0x17c0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0x9b/0xd0 kernel/entry/common.c:169 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline] irqentry_exit_to_user_mode+0x4e/0x80 kernel/entry/common.c:287 irqentry_exit+0x12/0x60 kernel/entry/common.c:375 exc_general_protection+0x415/0x490 arch/x86/kernel/traps.c:557 asm_exc_general_protection+0x1e/0x30 arch/x86/include/asm/idtentry.h:565 RIP: 0033:0x7f410ae2f171 Code: 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 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:00002000000001c0 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f410b048080 RCX: 00007f410ae2f169 RDX: 0000200000000200 RSI: 00002000000001c0 RDI: 0000000000000480 RBP: 00007f410aeb02a0 R08: 0000200000000280 R09: 0000200000000280 R10: 0000200000000240 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f410b048080 R15: 00007ffff54ba428 The buggy address belongs to the page: page:ffffea0004ccea00 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1333a8 flags: 0x4000000000000000() raw: 4000000000000000 dead000000000100 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 2, migratetype Unmovable, gfp_mask 0x142a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL), pid 11245, ts 388235731027, free_ts 388263842208 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_pages include/linux/gfp.h:544 [inline] __alloc_pages_node include/linux/gfp.h:557 [inline] alloc_pages_node include/linux/gfp.h:571 [inline] alloc_pages include/linux/gfp.h:590 [inline] kmalloc_order+0x4c/0x170 mm/slab_common.c:843 kmalloc_order_trace+0x18/0x90 mm/slab_common.c:859 kmalloc_large include/linux/slab.h:481 [inline] __kmalloc+0x1f1/0x330 mm/slub.c:4022 __kmalloc_node include/linux/slab.h:418 [inline] kmalloc_node include/linux/slab.h:575 [inline] alloc_htab_elem+0x269/0x710 kernel/bpf/hashtab.c:901 htab_map_update_elem+0x2c6/0x880 kernel/bpf/hashtab.c:1030 bpf_map_update_value+0x230/0x420 kernel/bpf/syscall.c:219 generic_map_update_batch+0x533/0x860 kernel/bpf/syscall.c:1372 bpf_map_do_batch+0x4c3/0x620 kernel/bpf/syscall.c:-1 __do_sys_bpf kernel/bpf/syscall.c:-1 [inline] __se_sys_bpf+0xc3c/0x11cb0 kernel/bpf/syscall.c:4396 __x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:4396 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:-1 entry_SYSCALL_64_after_hwframe+0x61/0xcb 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 kfree+0x1f0/0x270 mm/slub.c:4188 htab_elem_free kernel/bpf/hashtab.c:778 [inline] htab_elem_free_rcu+0xb3/0xf0 kernel/bpf/hashtab.c:786 rcu_do_batch+0x597/0xc40 kernel/rcu/tree.c:2494 rcu_core+0x5ad/0xe40 kernel/rcu/tree.c:2735 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2748 __do_softirq+0x268/0x5bb kernel/softirq.c:309 Memory state around the buggy address: ffff8881333a8300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881333a8380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8881333a8400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8881333a8480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881333a8500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== syz.7.2818 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000 CPU: 0 PID: 11369 Comm: syz.7.2818 Tainted: G B 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 dump_stack+0x15/0x17 lib/dump_stack.c:135 dump_header+0xd8/0x6d0 mm/oom_kill.c:502 oom_kill_process+0xef/0x2d0 mm/oom_kill.c:1032 out_of_memory+0x9bd/0xe10 mm/oom_kill.c:1175 mem_cgroup_out_of_memory+0x2a8/0x380 mm/memcontrol.c:1733 mem_cgroup_oom mm/memcontrol.c:1968 [inline] try_charge+0xff2/0x15f0 mm/memcontrol.c:2793 __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 __kernel_write+0x5ab/0x9d0 fs/read_write.c:550 dump_emit+0x261/0x3a0 fs/coredump.c:849 dump_user_range+0x71/0x1a0 fs/coredump.c:902 elf_core_dump+0x33bd/0x3c10 fs/binfmt_elf.c:2290 do_coredump+0x1eb8/0x2d60 fs/coredump.c:811 get_signal+0x102c/0x1410 kernel/signal.c:2779 arch_do_signal_or_restart+0xbd/0x17c0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0x9b/0xd0 kernel/entry/common.c:169 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline] irqentry_exit_to_user_mode+0x4e/0x80 kernel/entry/common.c:287 irqentry_exit+0x12/0x60 kernel/entry/common.c:375 exc_general_protection+0x415/0x490 arch/x86/kernel/traps.c:557 asm_exc_general_protection+0x1e/0x30 arch/x86/include/asm/idtentry.h:565 RIP: 0033:0x7f410ae2f171 Code: 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 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:00002000000001c0 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f410b048080 RCX: 00007f410ae2f169 RDX: 0000200000000200 RSI: 00002000000001c0 RDI: 0000000000000480 RBP: 00007f410aeb02a0 R08: 0000200000000280 R09: 0000200000000280 R10: 0000200000000240 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f410b048080 R15: 00007ffff54ba428 memory: usage 307200kB, limit 307200kB, failcnt 12880 memory+swap: usage 426136kB, limit 9007199254740988kB, failcnt 0 kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz7: anon 200704 file 308047872 kernel_stack 0 percpu 0 sock 0 shmem 308047872 file_mapped 135168 file_dirty 0 file_writeback 0 anon_thp 0 inactive_anon 284381184 active_anon 30142464 inactive_file 69632 active_file 12288 unevictable 0 slab_reclaimable 0 slab_unreclaimable 0 slab 0 workingset_refault_anon 0 workingset_refault_file 0 workingset_activate_anon 0 workingset_activate_file 0 workingset_restore_anon 0 workingset_restore_file 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz7,mems_allowed=0,oom_memcg=/syz7,task_memcg=/syz7,task=syz.7.2818,pid=11369,uid=0 Memory cgroup out of memory: Killed process 11369 (syz.7.2818) total-vm:89868kB, anon-rss:960kB, file-rss:49984kB, shmem-rss:0kB, UID:0 pgtables:184kB oom_score_adj:1000