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:00007f31d7b10038 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 RAX: ffffffffffffffda RBX: 00007f31d6fa5fa0 RCX: 00007f31d6d8d169 RDX: 0000000000004000 RSI: 0000000000001000 RDI: 0000200000000000 RBP: 00007f31d7b10090 R08: 0000200000001000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007f31d6fa5fa0 R15: 00007f31d70cfa28 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 0 UID: 0 PID: 9242 Comm: syz.3.795 Not tainted 6.14.0-syzkaller-12966-ga2cc6ff5ec8f #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:vrm_uncharge mm/mremap.c:964 [inline] RIP: 0010:expand_vma_in_place mm/mremap.c:1566 [inline] RIP: 0010:expand_vma mm/mremap.c:1621 [inline] RIP: 0010:mremap_at mm/mremap.c:1682 [inline] RIP: 0010:do_mremap mm/mremap.c:1727 [inline] RIP: 0010:__do_sys_mremap mm/mremap.c:1784 [inline] RIP: 0010:__se_sys_mremap+0x25fa/0x2c00 mm/mremap.c:1752 Code: c0 0f 85 0e 05 00 00 0f b6 9c 24 20 03 00 00 31 ff 89 de e8 d8 0d ab ff 85 db 0f 84 7b 01 00 00 e8 cb 0a ab ff e9 9e 00 00 00 <80> 78 04 00 74 0a bf 20 00 00 00 e8 36 2f 15 00 4c 8b 34 25 20 00 RSP: 0018:ffffc90005307b40 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff92000a60fca RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000 RBP: ffffc90005307f00 R08: ffffffff821d2455 R09: 1ffffffff1dcbd76 R10: dffffc0000000000 R11: fffffbfff1dcbd77 R12: 0000200000000000 R13: ffff888032575c80 R14: 0000000008200176 R15: ffffc90005307cd0 FS: 00007f31d7b106c0(0000) GS:ffff888124f99000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000794c8000 CR4: 00000000003526f0 DR0: 0000000000000680 DR1: 0000000000000003 DR2: 0000000000000007 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f31d6d8d169 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:00007f31d7b10038 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 RAX: ffffffffffffffda RBX: 00007f31d6fa5fa0 RCX: 00007f31d6d8d169 RDX: 0000000000004000 RSI: 0000000000001000 RDI: 0000200000000000 RBP: 00007f31d7b10090 R08: 0000200000001000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007f31d6fa5fa0 R15: 00007f31d70cfa28 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vrm_uncharge mm/mremap.c:964 [inline] RIP: 0010:expand_vma_in_place mm/mremap.c:1566 [inline] RIP: 0010:expand_vma mm/mremap.c:1621 [inline] RIP: 0010:mremap_at mm/mremap.c:1682 [inline] RIP: 0010:do_mremap mm/mremap.c:1727 [inline] RIP: 0010:__do_sys_mremap mm/mremap.c:1784 [inline] RIP: 0010:__se_sys_mremap+0x25fa/0x2c00 mm/mremap.c:1752 Code: c0 0f 85 0e 05 00 00 0f b6 9c 24 20 03 00 00 31 ff 89 de e8 d8 0d ab ff 85 db 0f 84 7b 01 00 00 e8 cb 0a ab ff e9 9e 00 00 00 <80> 78 04 00 74 0a bf 20 00 00 00 e8 36 2f 15 00 4c 8b 34 25 20 00 RSP: 0018:ffffc90005307b40 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff92000a60fca RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000 RBP: ffffc90005307f00 R08: ffffffff821d2455 R09: 1ffffffff1dcbd76 R10: dffffc0000000000 R11: fffffbfff1dcbd77 R12: 0000200000000000 R13: ffff888032575c80 R14: 0000000008200176 R15: ffffc90005307cd0 FS: 00007f31d7b106c0(0000) GS:ffff888124f99000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5965579178 CR3: 00000000794c8000 CR4: 00000000003526f0 DR0: 0000000000000680 DR1: 0000000000000003 DR2: 0000000000000007 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff c3 inc %ebx 2: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 9: 00 00 00 c: 0f 1f 40 00 nopl 0x0(%rax) 10: 48 89 f8 mov %rdi,%rax 13: 48 89 f7 mov %rsi,%rdi 16: 48 89 d6 mov %rdx,%rsi 19: 48 89 ca mov %rcx,%rdx 1c: 4d 89 c2 mov %r8,%r10 1f: 4d 89 c8 mov %r9,%r8 22: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 27: 0f 05 syscall * 29: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 2f: 73 01 jae 0x32 31: c3 ret 32: 48 c7 c1 a8 ff ff ff mov $0xffffffffffffffa8,%rcx 39: f7 d8 neg %eax 3b: 64 89 01 mov %eax,%fs:(%rcx) 3e: 48 rex.W