================================================================== BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline] BUG: KASAN: use-after-free in atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:167 [inline] BUG: KASAN: use-after-free in __refcount_sub_and_test include/linux/refcount.h:272 [inline] BUG: KASAN: use-after-free in __refcount_dec_and_test include/linux/refcount.h:315 [inline] BUG: KASAN: use-after-free in refcount_dec_and_test include/linux/refcount.h:333 [inline] BUG: KASAN: use-after-free in iocb_put fs/aio.c:1161 [inline] BUG: KASAN: use-after-free in io_submit_one+0x6fb/0x1b80 fs/aio.c:1882 Write of size 4 at addr ffff888018781ec8 by task syz-executor.2/13034 CPU: 1 PID: 13034 Comm: syz-executor.2 Not tainted 5.16.0-rc2-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 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+0x8d/0x2ed mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:433 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:450 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:167 [inline] __refcount_sub_and_test include/linux/refcount.h:272 [inline] __refcount_dec_and_test include/linux/refcount.h:315 [inline] refcount_dec_and_test include/linux/refcount.h:333 [inline] iocb_put fs/aio.c:1161 [inline] io_submit_one+0x6fb/0x1b80 fs/aio.c:1882 __do_sys_io_submit fs/aio.c:1938 [inline] __se_sys_io_submit fs/aio.c:1908 [inline] __x64_sys_io_submit+0x18c/0x330 fs/aio.c:1908 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+0x44/0xae RIP: 0033:0x7f47835feae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4780b53188 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007f4783712020 RCX: 00007f47835feae9 RDX: 0000000020000540 RSI: 0000000000000045 RDI: 00007f47836f5000 RBP: 00007f4783658f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffea139539f R14: 00007f4780b53300 R15: 0000000000022000 Allocated by task 13034: kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x85/0xb0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:259 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc mm/slab.c:3323 [inline] kmem_cache_alloc+0x265/0x560 mm/slab.c:3507 aio_get_req fs/aio.c:1028 [inline] io_submit_one+0xfd/0x1b80 fs/aio.c:1875 __do_sys_io_submit fs/aio.c:1938 [inline] __se_sys_io_submit fs/aio.c:1908 [inline] __x64_sys_io_submit+0x18c/0x330 fs/aio.c:1908 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+0x44/0xae Freed by task 13034: kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free mm/kasan/common.c:328 [inline] __kasan_slab_free+0xd1/0x110 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:235 [inline] __cache_free mm/slab.c:3445 [inline] kmem_cache_free.part.0+0x91/0x200 mm/slab.c:3741 iocb_destroy fs/aio.c:1080 [inline] iocb_put fs/aio.c:1163 [inline] iocb_put fs/aio.c:1159 [inline] aio_complete_rw+0x474/0x8c0 fs/aio.c:1440 aio_rw_done fs/aio.c:1510 [inline] aio_write+0x3b2/0x7a0 fs/aio.c:1577 __io_submit_one fs/aio.c:1832 [inline] io_submit_one+0xe09/0x1b80 fs/aio.c:1879 __do_sys_io_submit fs/aio.c:1938 [inline] __se_sys_io_submit fs/aio.c:1908 [inline] __x64_sys_io_submit+0x18c/0x330 fs/aio.c:1908 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+0x44/0xae The buggy address belongs to the object at ffff888018781e00 which belongs to the cache aio_kiocb of size 216 The buggy address is located 200 bytes inside of 216-byte region [ffff888018781e00, ffff888018781ed8) The buggy address belongs to the page: page:ffffea000061e040 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18781 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea00006084c8 ffff8880172b9150 ffff8880160fa200 raw: 0000000000000000 ffff888018781040 000000010000000c 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 13034, ts 2790174646992, free_ts 2788683523645 prep_new_page mm/page_alloc.c:2418 [inline] get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4149 __alloc_pages_slowpath.constprop.0+0x2eb/0x20d0 mm/page_alloc.c:4914 __alloc_pages+0x412/0x500 mm/page_alloc.c:5382 __alloc_pages_node include/linux/gfp.h:570 [inline] kmem_getpages mm/slab.c:1377 [inline] cache_grow_begin+0x75/0x470 mm/slab.c:2593 cache_alloc_refill+0x27f/0x380 mm/slab.c:2965 ____cache_alloc mm/slab.c:3048 [inline] ____cache_alloc mm/slab.c:3031 [inline] __do_cache_alloc mm/slab.c:3275 [inline] slab_alloc mm/slab.c:3316 [inline] kmem_cache_alloc+0x450/0x560 mm/slab.c:3507 aio_get_req fs/aio.c:1028 [inline] io_submit_one+0xfd/0x1b80 fs/aio.c:1875 __do_sys_io_submit fs/aio.c:1938 [inline] __se_sys_io_submit fs/aio.c:1908 [inline] __x64_sys_io_submit+0x18c/0x330 fs/aio.c:1908 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+0x44/0xae page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1338 [inline] free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3309 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3388 kasan_depopulate_vmalloc_pte+0x5c/0x70 mm/kasan/shadow.c:380 apply_to_pte_range mm/memory.c:2518 [inline] apply_to_pmd_range mm/memory.c:2562 [inline] apply_to_pud_range mm/memory.c:2598 [inline] apply_to_p4d_range mm/memory.c:2634 [inline] __apply_to_page_range+0x694/0x1080 mm/memory.c:2668 kasan_release_vmalloc+0xa7/0xc0 mm/kasan/shadow.c:490 __purge_vmap_area_lazy+0x8f9/0x1c50 mm/vmalloc.c:1708 _vm_unmap_aliases.part.0+0x3f0/0x500 mm/vmalloc.c:2111 _vm_unmap_aliases mm/vmalloc.c:2085 [inline] vm_unmap_aliases+0x45/0x50 mm/vmalloc.c:2134 change_page_attr_set_clr+0x241/0x500 arch/x86/mm/pat/set_memory.c:1743 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1800 [inline] set_memory_ro+0x78/0xa0 arch/x86/mm/pat/set_memory.c:1946 bpf_prog_lock_ro include/linux/filter.h:884 [inline] bpf_prog_select_runtime+0x690/0x900 kernel/bpf/core.c:1943 bpf_prog_load+0xf80/0x21d0 kernel/bpf/syscall.c:2347 __sys_bpf+0x674/0x5980 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+0x75/0xb0 kernel/bpf/syscall.c:4735 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+0x44/0xae Memory state around the buggy address: ffff888018781d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888018781e00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888018781e80: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc ^ ffff888018781f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888018781f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================