================================================================== BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:72 [inline] BUG: KASAN: use-after-free in atomic_long_read include/linux/atomic/atomic-instrumented.h:1265 [inline] BUG: KASAN: use-after-free in is_rwsem_reader_owned kernel/locking/rwsem.c:193 [inline] BUG: KASAN: use-after-free in __down_read_common kernel/locking/rwsem.c:1262 [inline] BUG: KASAN: use-after-free in __down_read_common kernel/locking/rwsem.c:1255 [inline] BUG: KASAN: use-after-free in __down_read kernel/locking/rwsem.c:1269 [inline] BUG: KASAN: use-after-free in down_read+0x1d3/0x450 kernel/locking/rwsem.c:1511 Read of size 8 at addr ffff88801268cc08 by task syz-executor166/3732 CPU: 1 PID: 3732 Comm: syz-executor166 Not tainted 6.1.0-rc1-syzkaller-00454-ga70385240892 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x45d mm/kasan/report.c:395 kasan_report+0xbb/0x1f0 mm/kasan/report.c:495 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:72 [inline] atomic_long_read include/linux/atomic/atomic-instrumented.h:1265 [inline] is_rwsem_reader_owned kernel/locking/rwsem.c:193 [inline] __down_read_common kernel/locking/rwsem.c:1262 [inline] __down_read_common kernel/locking/rwsem.c:1255 [inline] __down_read kernel/locking/rwsem.c:1269 [inline] down_read+0x1d3/0x450 kernel/locking/rwsem.c:1511 hugetlb_vma_lock_read mm/hugetlb.c:6816 [inline] hugetlb_fault+0x40a/0x2060 mm/hugetlb.c:5859 follow_hugetlb_page+0x3f3/0x1850 mm/hugetlb.c:6301 __get_user_pages+0x2cb/0xf10 mm/gup.c:1202 populate_vma_page_range+0x23d/0x320 mm/gup.c:1587 __mm_populate+0x101/0x3a0 mm/gup.c:1701 mm_populate include/linux/mm.h:2744 [inline] vm_mmap_pgoff+0x1fd/0x270 mm/util.c:525 ksys_mmap_pgoff+0x1c3/0x5a0 mm/mmap.c:1458 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+0x63/0xcd RIP: 0033:0x7f2baa5b9829 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2baa56b308 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f2baa6413e8 RCX: 00007f2baa5b9829 RDX: 0000000000000003 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 00007f2baa6413e0 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000068831 R11: 0000000000000246 R12: 00007f2baa6413ec R13: 00007fffce21835f R14: 00007f2baa56b400 R15: 0000000000022000 Allocated by task 3732: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 kasan_set_track+0x21/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_kmalloc+0xa1/0xb0 mm/kasan/common.c:380 kmalloc include/linux/slab.h:576 [inline] hugetlb_vma_lock_alloc.part.0+0x3f/0x130 mm/hugetlb.c:6926 hugetlb_vma_lock_alloc mm/hugetlb.c:6682 [inline] hugetlb_reserve_pages+0xa3f/0xe80 mm/hugetlb.c:6551 hugetlbfs_file_mmap+0x40c/0x5c0 fs/hugetlbfs/inode.c:167 call_mmap include/linux/fs.h:2196 [inline] mmap_region+0x6bf/0x1c00 mm/mmap.c:2625 do_mmap+0x825/0xf50 mm/mmap.c:1412 vm_mmap_pgoff+0x1ab/0x270 mm/util.c:520 ksys_mmap_pgoff+0x1c3/0x5a0 mm/mmap.c:1458 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+0x63/0xcd Freed by task 3733: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 kasan_set_track+0x21/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2a/0x40 mm/kasan/generic.c:511 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1750 slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0xab/0x3b0 mm/slub.c:3674 hugetlb_vma_lock_release mm/hugetlb.c:6871 [inline] kref_put include/linux/kref.h:65 [inline] __hugetlb_vma_unlock_write_put mm/hugetlb.c:6886 [inline] __hugetlb_vma_unlock_write_free mm/hugetlb.c:6894 [inline] __unmap_hugepage_range_final+0x2ad/0x340 mm/hugetlb.c:5215 unmap_single_vma+0x23d/0x2a0 mm/memory.c:1690 zap_page_range+0x38a/0x520 mm/memory.c:1762 madvise_dontneed_single_vma mm/madvise.c:793 [inline] madvise_dontneed_free mm/madvise.c:876 [inline] madvise_vma_behavior+0xee8/0x1cc0 mm/madvise.c:1015 madvise_walk_vmas+0x1c7/0x2b0 mm/madvise.c:1240 do_madvise.part.0+0x24a/0x340 mm/madvise.c:1419 do_madvise mm/madvise.c:1432 [inline] __do_sys_madvise mm/madvise.c:1432 [inline] __se_sys_madvise mm/madvise.c:1430 [inline] __x64_sys_madvise+0x113/0x150 mm/madvise.c:1430 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+0x63/0xcd The buggy address belongs to the object at ffff88801268cc00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 8 bytes inside of 192-byte region [ffff88801268cc00, ffff88801268ccc0) The buggy address belongs to the physical page: page:ffffea000049a300 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1268c flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea000049fd80 dead000000000003 ffff888011841a00 raw: 0000000000000000 0000000080100010 00000001ffffffff 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 1831390052, free_ts 0 prep_new_page mm/page_alloc.c:2538 [inline] get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4287 __alloc_pages+0x1c7/0x5a0 mm/page_alloc.c:5554 alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2118 alloc_pages+0x22f/0x270 mm/mempolicy.c:2280 alloc_slab_page mm/slub.c:1794 [inline] allocate_slab+0x213/0x300 mm/slub.c:1939 new_slab mm/slub.c:1992 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3180 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3279 slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x191/0x3e0 mm/slub.c:3437 kmalloc_trace+0x22/0x60 mm/slab_common.c:1046 kmalloc include/linux/slab.h:576 [inline] kzalloc include/linux/slab.h:712 [inline] call_usermodehelper_setup+0x97/0x340 kernel/umh.c:366 kobject_uevent_env+0xee6/0x1640 lib/kobject_uevent.c:614 device_add+0xb72/0x1e90 drivers/base/core.c:3498 __add_memory_block drivers/base/memory.c:632 [inline] add_memory_block+0x2de/0x610 drivers/base/memory.c:754 add_boot_memory_block drivers/base/memory.c:778 [inline] memory_dev_init+0x214/0x29b drivers/base/memory.c:922 driver_init+0x3e/0x48 drivers/base/init.c:39 do_basic_setup init/main.c:1408 [inline] kernel_init_freeable+0x4e3/0x788 init/main.c:1631 page_owner free stack trace missing Memory state around the buggy address: ffff88801268cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801268cb80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff88801268cc00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801268cc80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88801268cd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================