================================================================== BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:71 [inline] BUG: KASAN: use-after-free in atomic_long_read include/linux/atomic/atomic-instrumented.h:1265 [inline] BUG: KASAN: use-after-free in filp_close+0x22/0x160 fs/open.c:1382 BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:71 [inline] BUG: KASAN: use-after-free in atomic_long_read include/linux/atomic/atomic-instrumented.h:1265 [inline] BUG: KASAN: use-after-free in filp_close+0x22/0x160 fs/open.c:1382 Read of size 8 at addr ffff888071e6e5f0 by task syz-executor.2/9263 CPU: 0 PID: 9263 Comm: syz-executor.2 Not tainted 5.18.0-syzkaller-13842-g952923ddc011 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xeb/0x467 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:71 [inline] atomic_long_read include/linux/atomic/atomic-instrumented.h:1265 [inline] filp_close+0x22/0x160 fs/open.c:1382 close_fd+0x76/0xa0 fs/file.c:664 __do_sys_close fs/open.c:1407 [inline] __se_sys_close fs/open.c:1405 [inline] __x64_sys_close+0x2f/0xa0 fs/open.c:1405 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f81ad23bd4b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007fff32985890 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f81ad23bd4b RDX: 00007f81ad3a0888 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 00007f81ad39d960 R08: 0000000000000000 R09: 00007f81ad3a0890 R10: 00007fff32985990 R11: 0000000000000293 R12: 00000000000628a3 R13: 00007fff32985990 R14: 00007f81ad39bf60 R15: 0000000000000032 Allocated by task 9266: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] __kasan_slab_alloc+0x85/0xb0 mm/kasan/common.c:469 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc mm/slab.c:3302 [inline] __kmem_cache_alloc_lru mm/slab.c:3479 [inline] kmem_cache_alloc+0x265/0x560 mm/slab.c:3499 kmem_cache_zalloc include/linux/slab.h:723 [inline] __alloc_file+0x21/0x270 fs/file_table.c:138 alloc_empty_file+0x6d/0x170 fs/file_table.c:187 path_openat+0xe4/0x2910 fs/namei.c:3639 do_filp_open+0x1aa/0x400 fs/namei.c:3680 do_sys_openat2+0x16d/0x4c0 fs/open.c:1278 do_sys_open fs/open.c:1294 [inline] __do_sys_openat fs/open.c:1310 [inline] __se_sys_openat fs/open.c:1305 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1305 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Freed by task 15: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x13d/0x180 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] __cache_free mm/slab.c:3425 [inline] kmem_cache_free.part.0+0xa9/0x240 mm/slab.c:3735 rcu_do_batch kernel/rcu/tree.c:2578 [inline] rcu_core+0x7b1/0x1880 kernel/rcu/tree.c:2838 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 Last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0x7e/0x90 mm/kasan/generic.c:348 call_rcu+0x99/0x790 kernel/rcu/tree.c:3126 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Second to last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0x7e/0x90 mm/kasan/generic.c:348 task_work_add+0x3a/0x1f0 kernel/task_work.c:48 fput fs/file_table.c:378 [inline] fput+0xe7/0x190 fs/file_table.c:371 io_close fs/io_uring.c:6053 [inline] io_issue_sqe+0x3f29/0x9780 fs/io_uring.c:8464 io_queue_sqe fs/io_uring.c:8794 [inline] io_submit_sqe fs/io_uring.c:9058 [inline] io_submit_sqes+0x161d/0x8000 fs/io_uring.c:9169 __do_sys_io_uring_enter+0x1112/0x2300 fs/io_uring.c:12101 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 The buggy address belongs to the object at ffff888071e6e580 which belongs to the cache filp of size 456 The buggy address is located 112 bytes inside of 456-byte region [ffff888071e6e580, ffff888071e6e748) The buggy address belongs to the physical page: page:ffffea0001c79b80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x71e6e memcg:ffff88807c462f81 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0001dce148 ffffea00007c8a48 ffff888012015300 raw: 0000000000000000 ffff888071e6e080 0000000100000006 ffff88807c462f81 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x3420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 2978, tgid 2978 (udevd), ts 183029539131, free_ts 183019120186 prep_new_page mm/page_alloc.c:2456 [inline] get_page_from_freelist+0x1290/0x3b70 mm/page_alloc.c:4198 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5426 __alloc_pages_node include/linux/gfp.h:587 [inline] kmem_getpages mm/slab.c:1363 [inline] cache_grow_begin+0x75/0x350 mm/slab.c:2569 cache_alloc_refill+0x27f/0x380 mm/slab.c:2942 ____cache_alloc mm/slab.c:3024 [inline] ____cache_alloc mm/slab.c:3007 [inline] __do_cache_alloc mm/slab.c:3253 [inline] slab_alloc mm/slab.c:3295 [inline] __kmem_cache_alloc_lru mm/slab.c:3479 [inline] kmem_cache_alloc+0x450/0x560 mm/slab.c:3499 kmem_cache_zalloc include/linux/slab.h:723 [inline] __alloc_file+0x21/0x270 fs/file_table.c:138 alloc_empty_file+0x6d/0x170 fs/file_table.c:187 path_openat+0xe4/0x2910 fs/namei.c:3639 do_filp_open+0x1aa/0x400 fs/namei.c:3680 do_sys_openat2+0x16d/0x4c0 fs/open.c:1278 do_sys_open fs/open.c:1294 [inline] __do_sys_openat fs/open.c:1310 [inline] __se_sys_openat fs/open.c:1305 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1305 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1371 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1421 free_unref_page_prepare mm/page_alloc.c:3343 [inline] free_unref_page_list+0x16f/0xf80 mm/page_alloc.c:3475 release_pages+0xff1/0x2290 mm/swap.c:980 __pagevec_release+0x77/0x100 mm/swap.c:1000 pagevec_release include/linux/pagevec.h:82 [inline] folio_batch_release include/linux/pagevec.h:146 [inline] invalidate_mapping_pagevec+0x4a6/0x5c0 mm/truncate.c:543 invalidate_bdev+0xa7/0xd0 block/bdev.c:88 ext4_put_super+0x71d/0x1160 fs/ext4/super.c:1279 generic_shutdown_super+0x14c/0x400 fs/super.c:462 kill_block_super+0x97/0xf0 fs/super.c:1394 deactivate_locked_super+0x94/0x160 fs/super.c:332 deactivate_super+0xad/0xd0 fs/super.c:363 cleanup_mnt+0x3a2/0x540 fs/namespace.c:1186 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 Memory state around the buggy address: ffff888071e6e480: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc ffff888071e6e500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888071e6e580: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888071e6e600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888071e6e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 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