================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:72 [inline] BUG: KASAN: null-ptr-deref in atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] BUG: KASAN: null-ptr-deref in page_ref_count include/linux/page_ref.h:67 [inline] BUG: KASAN: null-ptr-deref in folio_ref_count include/linux/page_ref.h:89 [inline] BUG: KASAN: null-ptr-deref in folio_get include/linux/mm.h:1167 [inline] BUG: KASAN: null-ptr-deref in hugetlb_fault+0x1423/0x23f0 mm/hugetlb.c:6112 Read of size 4 at addr 0000000000000034 by task syz-executor.3/8007 CPU: 1 PID: 8007 Comm: syz-executor.3 Not tainted 6.2.0-rc5-next-20230123-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 kasan_report+0xc0/0xf0 mm/kasan/report.c:517 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x141/0x190 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:72 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] page_ref_count include/linux/page_ref.h:67 [inline] folio_ref_count include/linux/page_ref.h:89 [inline] folio_get include/linux/mm.h:1167 [inline] hugetlb_fault+0x1423/0x23f0 mm/hugetlb.c:6112 handle_mm_fault+0x753/0x850 mm/memory.c:5196 do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1407 handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7fb885486c16 Code: 82 63 01 00 00 48 89 d1 f3 a4 c3 80 fa 08 73 12 80 fa 04 73 1e 80 fa 01 77 26 72 05 0f b6 0e 88 0f c3 48 8b 4c 16 f8 48 8b 36 <48> 89 4c 17 f8 48 89 37 c3 8b 4c 16 fc 8b 36 89 4c 17 fc 89 37 c3 RSP: 002b:00007fff8c278e48 EFLAGS: 00010206 RAX: 0000000020000000 RBX: 0000000000000000 RCX: 0073636f72702e70 RDX: 000000000000000d RSI: 702e70756f726763 RDI: 0000000020000000 RBP: 00007fff8c278f08 R08: 00007fb885400000 R09: 00007fb885000000 R10: 00007fb885000158 R11: 0000000000000246 R12: 000000000007921e R13: 00007fff8c278f30 R14: 00007fb8855ac050 R15: 0000000000000032 ==================================================================