================================================================== 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 ffff88811eaaa470 by task syz-executor.5/21607 CPU: 1 PID: 21607 Comm: syz-executor.5 Not tainted 5.10.179-syzkaller-00312-g571f442f6752 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 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:978 shrink_page_list+0x1f38/0x4c60 mm/vmscan.c:1491 shrink_inactive_list+0x591/0x1150 mm/vmscan.c:2048 shrink_list mm/vmscan.c:2267 [inline] shrink_lruvec+0xced/0x3860 mm/vmscan.c:5408 shrink_node_memcgs mm/vmscan.c:5595 [inline] shrink_node+0xdf3/0x1fb0 mm/vmscan.c:5625 shrink_zones mm/vmscan.c:5828 [inline] do_try_to_free_pages+0x67e/0x15e0 mm/vmscan.c:5886 try_to_free_mem_cgroup_pages+0x369/0x830 mm/vmscan.c:6204 try_charge+0x4b8/0x15f0 mm/memcontrol.c:2742 __mem_cgroup_charge+0x147/0x6e0 mm/memcontrol.c:6847 mem_cgroup_charge include/linux/memcontrol.h:458 [inline] __add_to_page_cache_locked+0x29d/0xba0 mm/filemap.c:854 add_to_page_cache_lru+0x117/0x2c0 mm/filemap.c:948 pagecache_get_page+0x71e/0x950 mm/filemap.c:1859 grab_cache_page_write_begin+0x5d/0xa0 mm/filemap.c:3456 ext4_da_write_begin+0x587/0xf60 fs/ext4/inode.c:3065 generic_perform_write+0x2cd/0x570 mm/filemap.c:3506 ext4_buffered_write_iter+0x47d/0x610 fs/ext4/file.c:272 ext4_file_write_iter+0x193/0x1ca0 fs/ext4/file.c:689 __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:2287 do_coredump+0x1eb8/0x2d60 fs/coredump.c:811 get_signal+0x102c/0x1410 kernel/signal.c:2768 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+0x55/0x80 kernel/entry/common.c:287 irqentry_exit+0x12/0x60 kernel/entry/common.c:375 exc_page_fault+0x33d/0x5b0 arch/x86/mm/fault.c:1521 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571 RIP: 0033:0xf8122f59dc Code: Unable to access opcode bytes at RIP 0xf8122f59b2. RSP: 002b:00000000200000a8 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f2b797a4f80 RCX: 00007f2b79685389 RDX: 00000000200000c0 RSI: 00000000200000a0 RDI: 0000000000200000 RBP: 00007f2b796d0493 R08: 0000000020000200 R09: 0000000020000200 R10: 0000000020000100 R11: 0000000000000206 R12: 0000000000000000 R13: 00007fff125dbe2f R14: 00007f2b783f8300 R15: 0000000000022000 Allocated by task 92: 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] kmem_cache_alloc_trace+0x18a/0x2e0 mm/slub.c:2974 kmalloc include/linux/slab.h:552 [inline] kzalloc include/linux/slab.h:664 [inline] kobject_uevent_env+0x269/0x700 lib/kobject_uevent.c:524 kobject_synth_uevent+0x4eb/0xae0 lib/kobject_uevent.c:208 uevent_store+0x25/0x60 drivers/base/core.c:2302 dev_attr_store+0x5c/0x80 drivers/base/core.c:2003 sysfs_kf_write+0x123/0x140 fs/sysfs/file.c:139 kernfs_fop_write_iter+0x2c4/0x410 fs/kernfs/file.c:296 call_write_iter include/linux/fs.h:1976 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0xb55/0xe70 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 entry_SYSCALL_64_after_hwframe+0x61/0xc6 Freed by task 92: 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 kobject_uevent_env+0x33c/0x700 lib/kobject_uevent.c:626 kobject_synth_uevent+0x4eb/0xae0 lib/kobject_uevent.c:208 uevent_store+0x25/0x60 drivers/base/core.c:2302 dev_attr_store+0x5c/0x80 drivers/base/core.c:2003 sysfs_kf_write+0x123/0x140 fs/sysfs/file.c:139 kernfs_fop_write_iter+0x2c4/0x410 fs/kernfs/file.c:296 call_write_iter include/linux/fs.h:1976 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0xb55/0xe70 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 entry_SYSCALL_64_after_hwframe+0x61/0xc6 The buggy address belongs to the object at ffff88811eaaa000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 1136 bytes inside of 4096-byte region [ffff88811eaaa000, ffff88811eaab000) The buggy address belongs to the page: page:ffffea00047aaa00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11eaa8 head:ffffea00047aaa00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042c00 raw: 0000000000000000 0000000000040004 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 3219, ts 1731290150457, free_ts 1731234383409 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2455 [inline] prep_new_page+0x166/0x180 mm/page_alloc.c:2461 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4253 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5345 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] kmem_cache_alloc_trace+0x1bd/0x2e0 mm/slub.c:2972 kmalloc include/linux/slab.h:552 [inline] kzalloc include/linux/slab.h:664 [inline] uevent_show+0x160/0x310 drivers/base/core.c:2280 dev_attr_show+0x56/0xd0 drivers/base/core.c:1987 sysfs_kf_seq_show+0x265/0x3e0 fs/sysfs/file.c:61 kernfs_seq_show+0x119/0x160 fs/kernfs/file.c:168 seq_read_iter+0x430/0xd00 fs/seq_file.c:230 kernfs_fop_read_iter+0x145/0x470 fs/kernfs/file.c:241 call_read_iter include/linux/fs.h:1970 [inline] new_sync_read fs/read_write.c:415 [inline] vfs_read+0x999/0xbb0 fs/read_write.c:496 ksys_read+0x199/0x2c0 fs/read_write.c:634 __do_sys_read fs/read_write.c:644 [inline] __se_sys_read fs/read_write.c:642 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:642 page last free stack trace: reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1348 [inline] __free_pages_ok+0x82c/0x850 mm/page_alloc.c:1628 free_the_page+0x76/0x370 mm/page_alloc.c:5406 __free_pages+0x67/0xc0 mm/page_alloc.c:5415 __free_slab+0xcf/0x190 mm/slub.c:1894 free_slab mm/slub.c:1909 [inline] discard_slab mm/slub.c:1915 [inline] unfreeze_partials+0x15e/0x190 mm/slub.c:2410 put_cpu_partial+0xbf/0x180 mm/slub.c:2446 __slab_free+0x2c8/0x3a0 mm/slub.c:3095 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 kmem_cache_zalloc include/linux/slab.h:654 [inline] jbd2_alloc_handle include/linux/jbd2.h:1554 [inline] new_handle fs/jbd2/transaction.c:464 [inline] jbd2__journal_start+0x150/0x710 fs/jbd2/transaction.c:491 __ext4_journal_start_sb+0x249/0x4a0 fs/ext4/ext4_jbd2.c:105 Memory state around the buggy address: ffff88811eaaa300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88811eaaa380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88811eaaa400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88811eaaa480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88811eaaa500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================