================================================================== 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 ffff8880773d9bf0 by task syz-executor.0/9449 CPU: 1 PID: 9449 Comm: syz-executor.0 Not tainted 5.18.0-next-20220524-syzkaller #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/0x495 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: 0033:0x7fa132c3bd2b 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:00007ffc699e6420 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fa132c3bd2b RDX: 00007fa132da18b0 RSI: ffffffffffffffff RDI: 0000000000000004 RBP: 00007fa132d9d960 R08: 0000000000000000 R09: 00007fa132da18b8 R10: 00007ffc699e6520 R11: 0000000000000293 R12: 000000000006acc6 R13: 00007ffc699e6520 R14: 00007fa132d9bf60 R15: 0000000000000032 Allocated by task 9451: 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+0x90/0xc0 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_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3222 [inline] __kmem_cache_alloc_lru mm/slub.c:3229 [inline] kmem_cache_alloc+0x204/0x3b0 mm/slub.c:3239 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 alloc_file+0x59/0x590 fs/file_table.c:229 alloc_file_pseudo+0x165/0x250 fs/file_table.c:269 sock_alloc_file+0x4f/0x190 net/socket.c:463 sock_map_fd net/socket.c:487 [inline] __sys_socket+0x1a4/0x240 net/socket.c:1644 __do_sys_socket net/socket.c:1649 [inline] __se_sys_socket net/socket.c:1647 [inline] __x64_sys_socket+0x6f/0xb0 net/socket.c:1647 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 1071: 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+0x166/0x1a0 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1727 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1753 slab_free mm/slub.c:3507 [inline] kmem_cache_free+0xdd/0x5a0 mm/slub.c:3524 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+0xbe/0xd0 mm/kasan/generic.c:348 call_rcu+0x99/0x790 kernel/rcu/tree.c:3126 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 get_signal+0x1c5/0x2600 kernel/signal.c:2634 arch_do_signal_or_restart+0x82/0x20f0 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop kernel/entry/common.c:166 [inline] exit_to_user_mode_prepare+0x15f/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+0xbe/0xd0 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:6032 [inline] io_issue_sqe+0x39cf/0xaa20 fs/io_uring.c:8360 io_queue_sqe fs/io_uring.c:8703 [inline] io_req_task_submit+0xce/0x400 fs/io_uring.c:3066 handle_tw_list fs/io_uring.c:2938 [inline] tctx_task_work+0x16a/0xe10 fs/io_uring.c:2967 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 get_signal+0x1c5/0x2600 kernel/signal.c:2634 arch_do_signal_or_restart+0x82/0x20f0 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop kernel/entry/common.c:166 [inline] exit_to_user_mode_prepare+0x15f/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 The buggy address belongs to the object at ffff8880773d9b80 which belongs to the cache filp of size 456 The buggy address is located 112 bytes inside of 456-byte region [ffff8880773d9b80, ffff8880773d9d48) The buggy address belongs to the physical page: page:ffffea0001dcf600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x773d8 head:ffffea0001dcf600 order:1 compound_mapcount:0 compound_pincount:0 memcg:ffff88802030bf01 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00007aea00 dead000000000004 ffff8881400078c0 raw: 0000000000000000 00000000800c000c 00000001ffffffff ffff88802030bf01 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 8863, tgid 8863 (syz-executor.4), ts 414102246674, free_ts 414093679127 prep_new_page mm/page_alloc.c:2439 [inline] get_page_from_freelist+0xa64/0x3d10 mm/page_alloc.c:4258 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5482 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2272 alloc_slab_page mm/slub.c:1797 [inline] allocate_slab+0x26c/0x3c0 mm/slub.c:1942 new_slab mm/slub.c:2002 [inline] ___slab_alloc+0x985/0xd90 mm/slub.c:3002 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3089 slab_alloc_node mm/slub.c:3180 [inline] slab_alloc mm/slub.c:3222 [inline] __kmem_cache_alloc_lru mm/slub.c:3229 [inline] kmem_cache_alloc+0x360/0x3b0 mm/slub.c:3239 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:1354 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1404 free_unref_page_prepare mm/page_alloc.c:3290 [inline] free_unref_page+0x19/0x7b0 mm/page_alloc.c:3405 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3222 [inline] __kmem_cache_alloc_lru mm/slub.c:3229 [inline] kmem_cache_alloc+0x204/0x3b0 mm/slub.c:3239 ptlock_alloc mm/memory.c:5755 [inline] ptlock_init include/linux/mm.h:2299 [inline] pmd_ptlock_init include/linux/mm.h:2385 [inline] pgtable_pmd_page_ctor include/linux/mm.h:2421 [inline] pmd_alloc_one include/asm-generic/pgalloc.h:129 [inline] __pmd_alloc+0xbf/0x5c0 mm/memory.c:5206 pmd_alloc include/linux/mm.h:2249 [inline] __handle_mm_fault+0xd59/0x4130 mm/memory.c:4995 handle_mm_fault+0x1c8/0x790 mm/memory.c:5132 do_user_addr_fault+0x489/0x11c0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1484 [inline] exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1540 asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:570 Memory state around the buggy address: ffff8880773d9a80: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ffff8880773d9b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880773d9b80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880773d9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880773d9c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================