================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:102 [inline] BUG: KASAN: null-ptr-deref in atomic_cmpxchg include/linux/atomic/atomic-instrumented.h:503 [inline] BUG: KASAN: null-ptr-deref in page_ref_freeze include/linux/page_ref.h:318 [inline] BUG: KASAN: null-ptr-deref in alloc_buddy_huge_page.isra.0+0x103/0x230 mm/hugetlb.c:1960 Write of size 4 at addr 0000000000000034 by task syz-executor.3/9166 CPU: 0 PID: 9166 Comm: syz-executor.3 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 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_write include/linux/instrumented.h:102 [inline] atomic_cmpxchg include/linux/atomic/atomic-instrumented.h:503 [inline] page_ref_freeze include/linux/page_ref.h:318 [inline] alloc_buddy_huge_page.isra.0+0x103/0x230 mm/hugetlb.c:1960 alloc_fresh_huge_page+0x395/0x530 mm/hugetlb.c:2013 alloc_surplus_huge_page+0x139/0x2f0 mm/hugetlb.c:2227 gather_surplus_pages+0x1d1/0x6c0 mm/hugetlb.c:2373 hugetlb_acct_memory.part.0+0x74/0xd0 mm/hugetlb.c:4576 hugetlb_acct_memory mm/hugetlb.c:4548 [inline] hugetlb_reserve_pages+0x4e0/0xed0 mm/hugetlb.c:6605 hugetlbfs_file_mmap+0x40c/0x5c0 fs/hugetlbfs/inode.c:167 call_mmap include/linux/fs.h:2195 [inline] mmap_region+0x6bf/0x1bf0 mm/mmap.c:2624 do_mmap+0x825/0xf50 mm/mmap.c:1411 vm_mmap_pgoff+0x1ab/0x270 mm/util.c:520 ksys_mmap_pgoff+0x1c3/0x5a0 mm/mmap.c:1457 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: 0033:0x7f6c6888a5a9 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6c6999a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f6c689abf80 RCX: 00007f6c6888a5a9 RDX: 0000000000000003 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 00007f6c6999a1d0 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000068831 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffe94b0c23f R14: 00007f6c6999a300 R15: 0000000000022000 ==================================================================