RDX: 0000000000000006 RSI: 0000200000000240 RDI: 0000000000000003 RBP: 00007fdd671f2090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007fdd665a5fa0 R15: 00007ffd1097c0d8 BUG: unable to handle page fault for address: fffffffffffffff4 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 3eca067 P4D 3eca067 PUD 3ecc067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 1 UID: 0 PID: 4370 Comm: syz.2.17 Not tainted 6.14.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:vma_merge_existing_range+0x8f/0x770 mm/vma.c:734 Code: b6 d2 89 54 24 10 40 0f 94 c5 85 c0 0f 85 d8 00 00 00 49 83 7d 20 00 0f 85 e6 00 00 00 48 85 db 0f 84 f5 00 00 00 48 8b 04 24 <48> 39 03 0f 83 a3 00 00 00 4c 39 3c 24 0f 83 00 05 00 00 4d 85 f6 RSP: 0018:ffffc9000193bcb8 EFLAGS: 00010282 RAX: 0000200000807000 RBX: fffffffffffffff4 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff83b65452 RDI: ffffffff83b8e5d8 RBP: 0000000000000001 R08: 0000200000ce2000 R09: 0000000000100077 R10: 0000200000807000 R11: ffff888111c0d50c R12: 0000200000ce2001 R13: ffffc9000193bd48 R14: ffff888117b00930 R15: 0000200000ce2000 FS: 00007fdd671f26c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff4 CR3: 0000000171d30000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vma_modify.constprop.0+0x1a/0xc0 mm/vma.c:1517 vma_modify_flags_uffd+0xa3/0xd0 mm/vma.c:1598 userfaultfd_clear_vma+0x43/0x90 mm/userfaultfd.c:1833 userfaultfd_release_all+0xe0/0x180 mm/userfaultfd.c:1951 userfaultfd_release+0x44/0xe0 fs/userfaultfd.c:865 __fput+0xea/0x2b0 fs/file_table.c:464 task_work_run+0x54/0x80 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x18b/0x190 kernel/entry/common.c:218 do_syscall_64+0x7a/0x1a0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdd6638d169 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdd671f2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: 0000000000000020 RBX: 00007fdd665a5fa0 RCX: 00007fdd6638d169 RDX: 0000000000000006 RSI: 0000200000000240 RDI: 0000000000000003 RBP: 00007fdd671f2090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007fdd665a5fa0 R15: 00007ffd1097c0d8 Modules linked in: CR2: fffffffffffffff4 ---[ end trace 0000000000000000 ]--- RIP: 0010:vma_merge_existing_range+0x8f/0x770 mm/vma.c:734 Code: b6 d2 89 54 24 10 40 0f 94 c5 85 c0 0f 85 d8 00 00 00 49 83 7d 20 00 0f 85 e6 00 00 00 48 85 db 0f 84 f5 00 00 00 48 8b 04 24 <48> 39 03 0f 83 a3 00 00 00 4c 39 3c 24 0f 83 00 05 00 00 4d 85 f6 RSP: 0018:ffffc9000193bcb8 EFLAGS: 00010282 RAX: 0000200000807000 RBX: fffffffffffffff4 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff83b65452 RDI: ffffffff83b8e5d8 RBP: 0000000000000001 R08: 0000200000ce2000 R09: 0000000000100077 R10: 0000200000807000 R11: ffff888111c0d50c R12: 0000200000ce2001 R13: ffffc9000193bd48 R14: ffff888117b00930 R15: 0000200000ce2000 FS: 00007fdd671f26c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff4 CR3: 0000000171d30000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: b6 d2 mov $0xd2,%dh 2: 89 54 24 10 mov %edx,0x10(%rsp) 6: 40 0f 94 c5 sete %bpl a: 85 c0 test %eax,%eax c: 0f 85 d8 00 00 00 jne 0xea 12: 49 83 7d 20 00 cmpq $0x0,0x20(%r13) 17: 0f 85 e6 00 00 00 jne 0x103 1d: 48 85 db test %rbx,%rbx 20: 0f 84 f5 00 00 00 je 0x11b 26: 48 8b 04 24 mov (%rsp),%rax * 2a: 48 39 03 cmp %rax,(%rbx) <-- trapping instruction 2d: 0f 83 a3 00 00 00 jae 0xd6 33: 4c 39 3c 24 cmp %r15,(%rsp) 37: 0f 83 00 05 00 00 jae 0x53d 3d: 4d 85 f6 test %r14,%r14