================================================================== 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+0x31/0x150 fs/open.c:1382 Read of size 8 at addr ffff88807ea2e070 by task syz-executor.0/3995 CPU: 1 PID: 3995 Comm: syz-executor.0 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+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:313 print_report+0xf4/0x210 mm/kasan/report.c:429 kasan_report+0xfb/0x130 mm/kasan/report.c:491 kasan_check_range+0x2a7/0x2e0 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+0x31/0x150 fs/open.c:1382 __do_sys_close fs/open.c:1407 [inline] __se_sys_close fs/open.c:1405 [inline] __x64_sys_close+0x34/0x90 fs/open.c:1405 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f535643bd4b 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:00007ffd0e087ca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f535643bd4b RDX: 00007f53565a07e8 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 00007f535659bf60 R08: 0000000000000000 R09: 00007f53565a07f0 R10: 0000000000000001 R11: 0000000000000293 R12: 00007f535659bf6c R13: 00007f53565a07e8 R14: 00007f535659bf60 R15: 0000000000000000 Allocated by task 3995: 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:436 [inline] __kasan_slab_alloc+0xb2/0xe0 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+0x199/0x2f0 mm/slub.c:3239 kmem_cache_zalloc include/linux/slab.h:723 [inline] __alloc_file+0x26/0x230 fs/file_table.c:138 alloc_empty_file+0xa9/0x1b0 fs/file_table.c:187 path_openat+0x105/0x2ec0 fs/namei.c:3639 do_filp_open+0x277/0x4f0 fs/namei.c:3680 do_sys_openat2+0x13b/0x500 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+0x243/0x290 fs/open.c:1305 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Freed by task 22: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0xd8/0x110 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1727 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1753 slab_free mm/slub.c:3507 [inline] kmem_cache_free+0xc7/0x270 mm/slub.c:3524 rcu_do_batch kernel/rcu/tree.c:2578 [inline] rcu_core+0xa0c/0x16d0 kernel/rcu/tree.c:2838 __do_softirq+0x382/0x793 kernel/softirq.c:571 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 call_rcu+0x163/0x9c0 kernel/rcu/tree.c:3126 task_work_run+0x146/0x1c0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x134/0x160 kernel/entry/common.c:169 exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x2e/0x60 kernel/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 task_work_add+0x2f/0x200 kernel/task_work.c:48 fput+0xdc/0x1a0 fs/file_table.c:378 io_close fs/io_uring.c:6053 [inline] io_issue_sqe+0xabfd/0x136c0 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+0x59a2/0x9870 fs/io_uring.c:9169 __do_sys_io_uring_enter fs/io_uring.c:12101 [inline] __se_sys_io_uring_enter+0x2a5/0x2300 fs/io_uring.c:12027 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 The buggy address belongs to the object at ffff88807ea2e000 which belongs to the cache filp of size 456 The buggy address is located 112 bytes inside of 456-byte region [ffff88807ea2e000, ffff88807ea2e1c8) The buggy address belongs to the physical page: page:ffffea0001fa8b80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7ea2e head:ffffea0001fa8b80 order:1 compound_mapcount:0 compound_pincount:0 memcg:ffff888018768681 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00008e4200 dead000000000005 ffff888140007a00 raw: 0000000000000000 00000000000c000c 00000001ffffffff ffff888018768681 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2964, tgid 2964 (syslogd), ts 11956841348, free_ts 10718886022 prep_new_page mm/page_alloc.c:2456 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4198 __alloc_pages+0x259/0x560 mm/page_alloc.c:5426 alloc_slab_page+0x70/0xf0 mm/slub.c:1797 allocate_slab+0x5e/0x520 mm/slub.c:1942 new_slab mm/slub.c:2002 [inline] ___slab_alloc+0x41e/0xcd0 mm/slub.c:3002 __slab_alloc mm/slub.c:3089 [inline] 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+0x246/0x2f0 mm/slub.c:3239 kmem_cache_zalloc include/linux/slab.h:723 [inline] __alloc_file+0x26/0x230 fs/file_table.c:138 alloc_empty_file+0xa9/0x1b0 fs/file_table.c:187 path_openat+0x105/0x2ec0 fs/namei.c:3639 do_filp_open+0x277/0x4f0 fs/namei.c:3680 do_sys_openat2+0x13b/0x500 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+0x243/0x290 fs/open.c:1305 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 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+0x812/0x900 mm/page_alloc.c:1421 free_unref_page_prepare mm/page_alloc.c:3343 [inline] free_unref_page+0x7d/0x390 mm/page_alloc.c:3438 free_contig_range+0xa3/0x160 mm/page_alloc.c:9314 destroy_args+0xfe/0x971 mm/debug_vm_pgtable.c:1031 debug_vm_pgtable+0x454/0x4ad mm/debug_vm_pgtable.c:1354 do_one_initcall+0xbd/0x2b0 init/main.c:1295 do_initcall_level+0x168/0x218 init/main.c:1368 do_initcalls+0x4b/0x8c init/main.c:1384 kernel_init_freeable+0x43a/0x5c3 init/main.c:1610 kernel_init+0x19/0x2b0 init/main.c:1499 ret_from_fork+0x1f/0x30 Memory state around the buggy address: ffff88807ea2df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807ea2df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807ea2e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807ea2e080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807ea2e100: fb fb fb 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