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: 6085 Comm: syz-executor.3 Not tainted 6.7.0-rc5-next-20231215-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: 8f 42 00 5b 48 98 5d c3 90 41 54 55 53 48 89 fb e8 d4 0a b1 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:ffffc9001588f600 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81d74b41 RDX: 0000000000000001 RSI: ffffffff81d704fc RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000008 R13: 0000000000000015 R14: ffffc9001588f980 R15: ffffffff92a38840 FS: 00007fba0212d6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000280 CR3: 00000000258fc000 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 faultin_page mm/gup.c:958 [inline] __get_user_pages+0x4b1/0x1490 mm/gup.c:1241 faultin_vma_page_range+0x1e9/0x2d0 mm/gup.c:1737 madvise_populate mm/madvise.c:929 [inline] madvise_vma_behavior+0x96c/0x1b50 mm/madvise.c:1038 madvise_walk_vmas+0x1cf/0x2c0 mm/madvise.c:1260 do_madvise+0x333/0x660 mm/madvise.c:1440 __do_sys_madvise mm/madvise.c:1453 [inline] __se_sys_madvise mm/madvise.c:1451 [inline] __x64_sys_madvise+0xa9/0x110 mm/madvise.c:1451 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x62/0x6a RIP: 0033:0x7fba0147cba9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fba0212d0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007fba0159c120 RCX: 00007fba0147cba9 RDX: 0000000000000017 RSI: 0000000000600000 RDI: 0000000020000000 RBP: 00007fba014c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fba0159c120 R15: 00007fffcf878808 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: 8f 42 00 5b 48 98 5d c3 90 41 54 55 53 48 89 fb e8 d4 0a b1 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:ffffc9001588f600 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81d74b41 RDX: 0000000000000001 RSI: ffffffff81d704fc RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000008 R13: 0000000000000015 R14: ffffc9001588f980 R15: ffffffff92a38840 FS: 00007fba0212d6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020007038 CR3: 00000000258fc000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8f 42 00 pop 0x0(%rdx) 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 d4 0a b1 ff call 0xffb10ae9 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