general protection fault, probably for non-canonical address 0xdffffc00000000fe: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000007f0-0x00000000000007f7] CPU: 1 PID: 14933 Comm: syz-executor.3 Not tainted 6.7.0-syzkaller-09928-g052d534373b7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:mm_has_notifiers include/linux/mmu_notifier.h:282 [inline] RIP: 0010:mmu_notifier_invalidate_range_start include/linux/mmu_notifier.h:455 [inline] RIP: 0010:do_pagemap_scan+0xa8c/0xcd0 fs/proc/task_mmu.c:2455 Code: 8d 41 b8 01 00 00 00 e8 42 0e 55 ff 48 8b 5c 24 78 58 48 b8 00 00 00 00 00 fc ff df 48 8d bb f0 07 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f8 01 00 00 48 83 bb f0 07 00 00 00 0f 85 1d 01 RSP: 0018:ffffc90004dafcd8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 00000000000000fe RSI: ffffffff8b2f8d40 RDI: 00000000000007f0 RBP: 0000000020ffa000 R08: 0000000000000000 R09: fffffbfff1e7525a R10: ffffffff8f3a92d7 R11: ffffffff8a8ac363 R12: 0000000020000100 R13: 0000000000000001 R14: 0000000000000007 R15: 0000000000000000 FS: 00007fa06752c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31825000 CR3: 000000007d064000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_pagemap_cmd+0x5e/0x80 fs/proc/task_mmu.c:2511 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fa06687cda9 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:00007fa06752c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fa0669abf80 RCX: 00007fa06687cda9 RDX: 00000000200001c0 RSI: 00000000c0606610 RDI: 0000000000000005 RBP: 00007fa0668c947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fa0669abf80 R15: 00007fa066acfa48 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mm_has_notifiers include/linux/mmu_notifier.h:282 [inline] RIP: 0010:mmu_notifier_invalidate_range_start include/linux/mmu_notifier.h:455 [inline] RIP: 0010:do_pagemap_scan+0xa8c/0xcd0 fs/proc/task_mmu.c:2455 Code: 8d 41 b8 01 00 00 00 e8 42 0e 55 ff 48 8b 5c 24 78 58 48 b8 00 00 00 00 00 fc ff df 48 8d bb f0 07 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f8 01 00 00 48 83 bb f0 07 00 00 00 0f 85 1d 01 RSP: 0018:ffffc90004dafcd8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 00000000000000fe RSI: ffffffff8b2f8d40 RDI: 00000000000007f0 RBP: 0000000020ffa000 R08: 0000000000000000 R09: fffffbfff1e7525a R10: ffffffff8f3a92d7 R11: ffffffff8a8ac363 R12: 0000000020000100 R13: 0000000000000001 R14: 0000000000000007 R15: 0000000000000000 FS: 00007fa06752c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb896100f61 CR3: 000000007d064000 CR4: 00000000003506f0 ---------------- Code disassembly (best guess): 0: 8d 41 b8 lea -0x48(%rcx),%eax 3: 01 00 add %eax,(%rax) 5: 00 00 add %al,(%rax) 7: e8 42 0e 55 ff call 0xff550e4e c: 48 8b 5c 24 78 mov 0x78(%rsp),%rbx 11: 58 pop %rax 12: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 19: fc ff df 1c: 48 8d bb f0 07 00 00 lea 0x7f0(%rbx),%rdi 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 f8 01 00 00 jne 0x22c 34: 48 83 bb f0 07 00 00 cmpq $0x0,0x7f0(%rbx) 3b: 00 3c: 0f .byte 0xf 3d: 85 .byte 0x85 3e: 1d .byte 0x1d 3f: 01 .byte 0x1