general protection fault, probably for non-canonical address 0xdffffc0000000025: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000128-0x000000000000012f] CPU: 0 PID: 9118 Comm: syz-executor.3 Not tainted 6.3.0-rc3-next-20230323-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:vma_merge+0x234/0x1fd0 mm/mmap.c:952 Code: 08 00 0f 84 b0 03 00 00 e8 e9 54 bf ff 48 8b 44 24 08 48 8d b8 a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4d 18 00 00 48 8b 44 24 08 48 8b b0 a8 00 00 00 RSP: 0018:ffffc90005e77998 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88807ced1200 RCX: ffffc9000ccdf000 RDX: 0000000000000025 RSI: ffffffff81c37957 RDI: 0000000000000128 RBP: ffff88807ced1e00 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000020000000 R15: 0000000000000000 FS: 00007feea7abd700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556ac3708 CR3: 00000000257de000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: madvise_update_vma+0x23f/0xd40 mm/madvise.c:153 madvise_vma_behavior+0x7f6/0x20e0 mm/madvise.c:1091 madvise_walk_vmas+0x1c7/0x2b0 mm/madvise.c:1260 do_madvise.part.0+0x193/0x470 mm/madvise.c:1439 do_madvise mm/madvise.c:1452 [inline] __do_sys_madvise mm/madvise.c:1452 [inline] __se_sys_madvise mm/madvise.c:1450 [inline] __x64_sys_madvise+0x117/0x150 mm/madvise.c:1450 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7feea6c8c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007feea7abd168 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007feea6dabf80 RCX: 00007feea6c8c0f9 RDX: 000000000000000e RSI: 0000000000600003 RDI: 0000000020000000 RBP: 00007feea6ce7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc4e25a9af R14: 00007feea7abd300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vma_merge+0x234/0x1fd0 mm/mmap.c:952 Code: 08 00 0f 84 b0 03 00 00 e8 e9 54 bf ff 48 8b 44 24 08 48 8d b8 a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4d 18 00 00 48 8b 44 24 08 48 8b b0 a8 00 00 00 RSP: 0018:ffffc90005e77998 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88807ced1200 RCX: ffffc9000ccdf000 RDX: 0000000000000025 RSI: ffffffff81c37957 RDI: 0000000000000128 RBP: ffff88807ced1e00 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000020000000 R15: 0000000000000000 FS: 00007feea7abd700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556873708 CR3: 00000000257de000 CR4: 00000000003526e0 DR0: 00000000ffff070c DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 08 00 or %al,(%rax) 2: 0f 84 b0 03 00 00 je 0x3b8 8: e8 e9 54 bf ff callq 0xffbf54f6 d: 48 8b 44 24 08 mov 0x8(%rsp),%rax 12: 48 8d b8 a8 00 00 00 lea 0xa8(%rax),%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 4d 18 00 00 jne 0x1881 34: 48 8b 44 24 08 mov 0x8(%rsp),%rax 39: 48 8b b0 a8 00 00 00 mov 0xa8(%rax),%rsi