================================================================== 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+0x6f1/0x760 mm/filemap.c:172 Read of size 4 at addr ffff88811101f470 by task syz.1.6403/13913 CPU: 0 PID: 13913 Comm: syz.1.6403 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x10f/0x150 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+0x6f1/0x760 mm/filemap.c:172 __delete_from_page_cache+0xbe/0x470 mm/filemap.c:240 __remove_mapping+0x601/0x990 mm/vmscan.c:1216 shrink_page_list+0x2a24/0x5800 mm/vmscan.c:1829 shrink_inactive_list mm/vmscan.c:2338 [inline] shrink_list mm/vmscan.c:2583 [inline] shrink_lruvec+0x11eb/0x3b00 mm/vmscan.c:5800 shrink_node_memcgs mm/vmscan.c:5992 [inline] shrink_node+0x11ee/0x2a40 mm/vmscan.c:6022 shrink_zones mm/vmscan.c:6228 [inline] do_try_to_free_pages+0x5a7/0x1580 mm/vmscan.c:6286 try_to_free_mem_cgroup_pages+0x261/0x610 mm/vmscan.c:6608 mem_cgroup_force_empty mm/memcontrol.c:3598 [inline] mem_cgroup_force_empty_write+0x130/0x170 mm/memcontrol.c:3619 cgroup_file_write+0x294/0x560 kernel/cgroup/cgroup.c:4011 kernfs_fop_write_iter+0x2bd/0x400 fs/kernfs/file.c:296 call_write_iter include/linux/fs.h:2218 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x831/0xfd0 fs/read_write.c:594 ksys_write+0x14a/0x260 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 x64_sys_call+0x8ef/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fb21fb66f19 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb21e5b5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fb21fde3fa0 RCX: 00007fb21fb66f19 RDX: 0000000000000001 RSI: 0000200000000480 RDI: 0000000000000003 RBP: 00007fb21fbf5f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb21fde4038 R14: 00007fb21fde3fa0 R15: 00007ffdb3f12838 The buggy address belongs to the page: page:ffffea00044407c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11101f flags: 0x4000000000000000(zone=1) raw: 4000000000000000 0000000000000000 ffffea00044407c8 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 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 1564, ts 56160758072, free_ts 215143597418 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2610 prep_new_page+0x1c/0x110 mm/page_alloc.c:2616 get_page_from_freelist+0x2d42/0x2dd0 mm/page_alloc.c:4492 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5829 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa0/0x4d0 mm/slub.c:2000 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033 __slab_alloc+0x49/0x90 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] kmem_cache_alloc_trace+0x146/0x270 mm/slub.c:3272 kmalloc include/linux/slab.h:619 [inline] kzalloc include/linux/slab.h:750 [inline] copy_verifier_state+0x592/0xce0 kernel/bpf/verifier.c:975 is_state_visited kernel/bpf/verifier.c:11121 [inline] do_check+0x369a/0xf120 kernel/bpf/verifier.c:11236 do_check_common+0x1020/0x19e0 kernel/bpf/verifier.c:13514 do_check_main kernel/bpf/verifier.c:13577 [inline] bpf_check+0x332f/0xf750 kernel/bpf/verifier.c:14160 bpf_prog_load+0x10c5/0x1620 kernel/bpf/syscall.c:2328 __sys_bpf+0x51d/0x7d0 kernel/bpf/syscall.c:4633 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline] __se_sys_bpf kernel/bpf/syscall.c:4735 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:4735 x64_sys_call+0x4b9/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1477 [inline] free_pcp_prepare mm/page_alloc.c:1549 [inline] free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3540 free_unref_page+0xae/0x540 mm/page_alloc.c:3622 free_the_page mm/page_alloc.c:808 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5905 __free_slab+0xe5/0x1e0 mm/slub.c:2025 free_slab mm/slub.c:2040 [inline] discard_slab+0x29/0x40 mm/slub.c:2046 __slab_free+0x211/0x290 mm/slub.c:3431 do_slab_free mm/slub.c:3514 [inline] ___cache_free+0x104/0x120 mm/slub.c:3535 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:283 ____kasan_kmalloc mm/kasan/common.c:478 [inline] __kasan_kmalloc+0x2f/0x100 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc+0x13d/0x2c0 mm/slub.c:4436 kmalloc include/linux/slab.h:624 [inline] usb_alloc_urb+0x44/0x140 drivers/usb/core/urb.c:74 usb_internal_control_msg drivers/usb/core/message.c:109 [inline] usb_control_msg+0x11c/0x3f0 drivers/usb/core/message.c:166 usb_get_string+0xa8/0x3d0 drivers/usb/core/message.c:901 usb_string_sub+0x7f/0x450 drivers/usb/core/message.c:940 Memory state around the buggy address: ffff88811101f300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88811101f380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88811101f400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88811101f480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88811101f500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== page_owner tracks the page as freed 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 1564, ts 56160758072, free_ts 2151435 page last free stack trace: