general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 24632 Comm: syz-executor.1 Not tainted 6.7.0-rc6-next-20231219-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:PageTail include/linux/page-flags.h:286 [inline] RIP: 0010:folio_flags.constprop.0+0x21/0x150 include/linux/page-flags.h:313 Code: 8b 42 00 5b 48 98 5d c3 90 41 54 55 53 48 89 fb e8 a4 ff b0 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 01 01 00 00 48 8b 6b 08 31 ff 83 e5 01 48 89 ee RSP: 0018:ffffc9000530fa18 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81d749b1 RDX: 0000000000000001 RSI: ffffffff81d7036c RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000008 R13: 0000000000000021 R14: ffffc9000530fd98 R15: ffffffff92a3a840 FS: 0000555556ff0480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000202b6000 CR3: 0000000085b0b000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: folio_test_head include/linux/page-flags.h:785 [inline] folio_test_large include/linux/page-flags.h:806 [inline] folio_nr_pages include/linux/mm.h:2059 [inline] folio_file_page include/linux/pagemap.h:826 [inline] swapin_readahead+0x1d5/0xe40 mm/swap_state.c:888 do_swap_page+0x4a0/0x3150 mm/memory.c:3891 handle_pte_fault mm/memory.c:5138 [inline] __handle_mm_fault+0x139c/0x48f0 mm/memory.c:5276 handle_mm_fault+0x476/0xa00 mm/memory.c:5441 do_user_addr_fault+0x309/0x1000 arch/x86/mm/fault.c:1364 handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1561 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7f290142b441 Code: 48 8b 54 24 08 48 85 d2 74 17 8b 44 24 18 0f c8 89 c0 48 89 44 24 18 48 83 fa 01 0f 85 b3 01 00 00 48 8b 44 24 10 8b 54 24 18 <89> 10 e9 15 fd ff ff 48 8b 44 24 10 8b 10 48 8b 44 24 08 48 85 c0 RSP: 002b:00007fffc5f7f6d0 EFLAGS: 00010246 RAX: 0000000020000200 RBX: 0000000000000004 RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000555556ff0360 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: 0000001b31d60000 R11: 0000000000000246 R12: 00007f2901000d38 R13: fffffffffffffffe R14: 00007f2901000000 R15: 00007f2901000d40 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:PageTail include/linux/page-flags.h:286 [inline] RIP: 0010:folio_flags.constprop.0+0x21/0x150 include/linux/page-flags.h:313 Code: 8b 42 00 5b 48 98 5d c3 90 41 54 55 53 48 89 fb e8 a4 ff b0 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 01 01 00 00 48 8b 6b 08 31 ff 83 e5 01 48 89 ee RSP: 0018:ffffc9000530fa18 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81d749b1 RDX: 0000000000000001 RSI: ffffffff81d7036c RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000008 R13: 0000000000000021 R14: ffffc9000530fd98 R15: ffffffff92a3a840 FS: 0000555556ff0480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0238aac58 CR3: 0000000085b0b000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8b 42 00 mov 0x0(%rdx),%eax 3: 5b pop %rbx 4: 48 98 cltq 6: 5d pop %rbp 7: c3 ret 8: 90 nop 9: 41 54 push %r12 b: 55 push %rbp c: 53 push %rbx d: 48 89 fb mov %rdi,%rbx 10: e8 a4 ff b0 ff call 0xffb0ffb9 15: 48 8d 7b 08 lea 0x8(%rbx),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 01 01 00 00 jne 0x135 34: 48 8b 6b 08 mov 0x8(%rbx),%rbp 38: 31 ff xor %edi,%edi 3a: 83 e5 01 and $0x1,%ebp 3d: 48 89 ee mov %rbp,%rsi