general protection fault, probably for non-canonical address 0xdffffc000000001d: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000e8-0x00000000000000ef] CPU: 0 PID: 5082 Comm: syz-executor147 Not tainted 6.6.0-syzkaller-12401-g8f6f76a6a29f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:__lock_acquire+0x109/0x5de0 kernel/locking/lockdep.c:5004 Code: 45 85 c9 0f 84 cc 0e 00 00 44 8b 05 01 b8 81 0b 45 85 c0 0f 84 be 0d 00 00 48 ba 00 00 00 00 00 fc ff df 4c 89 d1 48 c1 e9 03 <80> 3c 11 00 0f 85 e8 40 00 00 49 81 3a a0 19 b4 90 0f 84 96 0d 00 RSP: 0018:ffffc9000447f798 EFLAGS: 00010016 RAX: ffff888071ca1dc0 RBX: 1ffff9200088ff23 RCX: 000000000000001d RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 00000000000000e8 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 00000000000000e8 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f12313fe410 CR3: 0000000028ea9000 CR4: 0000000000350ef0 Call Trace: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 down_write+0x93/0x200 kernel/locking/rwsem.c:1579 hugetlb_vma_lock_write mm/hugetlb.c:300 [inline] hugetlb_vma_lock_write+0xae/0x100 mm/hugetlb.c:291 __hugetlb_zap_begin+0x1e9/0x2b0 mm/hugetlb.c:5708 hugetlb_zap_begin include/linux/hugetlb.h:258 [inline] unmap_vmas+0x2f4/0x470 mm/memory.c:1742 exit_mmap+0x1ad/0xa60 mm/mmap.c:3308 __mmput+0x12a/0x4d0 kernel/fork.c:1349 mmput+0x62/0x70 kernel/fork.c:1371 exit_mm kernel/exit.c:567 [inline] do_exit+0x9ad/0x2ae0 kernel/exit.c:858 __do_sys_exit kernel/exit.c:988 [inline] __se_sys_exit kernel/exit.c:986 [inline] __x64_sys_exit+0x42/0x50 kernel/exit.c:986 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f12313c4af9 Code: Unable to access opcode bytes at 0x7f12313c4acf. RSP: 002b:00007ffc81e1e3d8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f12313c4af9 RDX: 00007f12313fe433 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000000e4ef R08: 0000000000000000 R09: 0000000000000006 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc81e1e3ec R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0x109/0x5de0 kernel/locking/lockdep.c:5004 Code: 45 85 c9 0f 84 cc 0e 00 00 44 8b 05 01 b8 81 0b 45 85 c0 0f 84 be 0d 00 00 48 ba 00 00 00 00 00 fc ff df 4c 89 d1 48 c1 e9 03 <80> 3c 11 00 0f 85 e8 40 00 00 49 81 3a a0 19 b4 90 0f 84 96 0d 00 RSP: 0018:ffffc9000447f798 EFLAGS: 00010016 RAX: ffff888071ca1dc0 RBX: 1ffff9200088ff23 RCX: 000000000000001d RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 00000000000000e8 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 00000000000000e8 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f12313fe410 CR3: 0000000028ea9000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 45 85 c9 test %r9d,%r9d 3: 0f 84 cc 0e 00 00 je 0xed5 9: 44 8b 05 01 b8 81 0b mov 0xb81b801(%rip),%r8d # 0xb81b811 10: 45 85 c0 test %r8d,%r8d 13: 0f 84 be 0d 00 00 je 0xdd7 19: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 20: fc ff df 23: 4c 89 d1 mov %r10,%rcx 26: 48 c1 e9 03 shr $0x3,%rcx * 2a: 80 3c 11 00 cmpb $0x0,(%rcx,%rdx,1) <-- trapping instruction 2e: 0f 85 e8 40 00 00 jne 0x411c 34: 49 81 3a a0 19 b4 90 cmpq $0xffffffff90b419a0,(%r10) 3b: 0f .byte 0xf 3c: 84 .byte 0x84 3d: 96 xchg %eax,%esi 3e: 0d .byte 0xd