general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 19914 Comm: syz-executor.2 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:PagePoisoned include/linux/page-flags.h:304 [inline] RIP: 0010:PageHead include/linux/page-flags.h:787 [inline] RIP: 0010:PageHeadHuge+0x1d/0x200 mm/hugetlb.c:1892 Code: ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 41 54 55 48 89 fd 53 e8 64 af b9 ff 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 a2 01 00 00 48 8b 5d 00 48 c7 c7 ff ff ff ff 48 RSP: 0018:ffffc900036ff768 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffffc900036ff950 RCX: ffffc90006b29000 RDX: 0000000000000000 RSI: ffffffff81c2e49c RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffffc900036ff960 R13: 0000000000000003 R14: 0000000000000003 R15: 0000000000000081 FS: 00007f4390385700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fe35000 CR3: 00000000750d6000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: folio_test_hugetlb include/linux/page-flags.h:831 [inline] folio_file_page include/linux/pagemap.h:683 [inline] shmem_fault+0x27c/0x8a0 mm/shmem.c:2130 __do_fault+0x107/0x600 mm/memory.c:4191 do_shared_fault mm/memory.c:4597 [inline] do_fault mm/memory.c:4675 [inline] handle_pte_fault mm/memory.c:4943 [inline] __handle_mm_fault+0x2200/0x3a40 mm/memory.c:5085 handle_mm_fault+0x1c8/0x780 mm/memory.c:5206 faultin_page mm/gup.c:953 [inline] __get_user_pages+0x497/0xf10 mm/gup.c:1174 faultin_vma_page_range+0x21b/0x300 mm/gup.c:1594 madvise_populate mm/madvise.c:909 [inline] madvise_vma_behavior+0x67c/0x1cc0 mm/madvise.c:1018 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 RIP: 0033:0x7f438f28a5a9 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:00007f4390385168 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007f438f3abf80 RCX: 00007f438f28a5a9 RDX: 0000000000000017 RSI: 0000000000600003 RDI: 0000000020000000 RBP: 00007f438f2e5580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe028c99af R14: 00007f4390385300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:PagePoisoned include/linux/page-flags.h:304 [inline] RIP: 0010:PageHead include/linux/page-flags.h:787 [inline] RIP: 0010:PageHeadHuge+0x1d/0x200 mm/hugetlb.c:1892 Code: ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 41 54 55 48 89 fd 53 e8 64 af b9 ff 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 a2 01 00 00 48 8b 5d 00 48 c7 c7 ff ff ff ff 48 RSP: 0018:ffffc900036ff768 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffffc900036ff950 RCX: ffffc90006b29000 RDX: 0000000000000000 RSI: ffffffff81c2e49c RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffffc900036ff960 R13: 0000000000000003 R14: 0000000000000003 R15: 0000000000000081 FS: 00007f4390385700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fe37000 CR3: 00000000750d6000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: ff 66 66 jmpq *0x66(%rsi) 3: 2e 0f 1f 84 00 00 00 nopl %cs:0x0(%rax,%rax,1) a: 00 00 c: 90 nop d: 41 54 push %r12 f: 55 push %rbp 10: 48 89 fd mov %rdi,%rbp 13: 53 push %rbx 14: e8 64 af b9 ff callq 0xffb9af7d 19: 48 89 ea mov %rbp,%rdx 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 a2 01 00 00 jne 0x1d6 34: 48 8b 5d 00 mov 0x0(%rbp),%rbx 38: 48 c7 c7 ff ff ff ff mov $0xffffffffffffffff,%rdi 3f: 48 rex.W