BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 124b18067 P4D 124b18067 
PUD 124b14067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 361 Comm: syz-executor.0 Not tainted 6.1.118-syzkaller-1166346-g3e3f2b9e9fca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc900014d6ff8 EFLAGS: 00010246

RAX: 1ffff9200029aeb8 RBX: dffffc0000000000 RCX: ffff888112f9d100
RDX: 0000000000000000 RSI: ffffea0004951500 RDI: ffff88811281b380
RBP: ffffc900014d7150 R08: ffffffff81a47588 R09: fffff9400092a2a7
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900014d75c0
R13: ffffea0004951500 R14: ffffc900014d75d8 R15: 0000000000000000
FS:  00007f24625a86c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000124b26000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 read_pages+0x89c/0xd40 mm/readahead.c:192
 page_cache_ra_order+0x822/0xc40 mm/readahead.c:564
 ondemand_readahead+0x91a/0xee0 mm/readahead.c:700
 page_cache_sync_ra+0x3d6/0x450 mm/readahead.c:727
 page_cache_sync_readahead include/linux/pagemap.h:1257 [inline]
 collapse_file mm/khugepaged.c:1887 [inline]
 hpage_collapse_scan_file+0x196e/0x48c0 mm/khugepaged.c:2259
 madvise_collapse+0x639/0xcf0 mm/khugepaged.c:2714
 madvise_vma_behavior mm/madvise.c:1125 [inline]
 madvise_walk_vmas mm/madvise.c:1299 [inline]
 do_madvise+0x1604/0x40b0 mm/madvise.c:1478
 __do_sys_madvise mm/madvise.c:1491 [inline]
 __se_sys_madvise mm/madvise.c:1489 [inline]
 __x64_sys_madvise+0xa8/0xc0 mm/madvise.c:1489
 x64_sys_call+0xec/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:29
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f246187de69
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:00007f24625a80c8 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f24619abf80 RCX: 00007f246187de69
RDX: 0000000000000019 RSI: 0000000000600003 RDI: 0000000020000000
RBP: 00007f24618ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f24619abf80 R15: 00007ffdd026f3f8
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc900014d6ff8 EFLAGS: 00010246
RAX: 1ffff9200029aeb8 RBX: dffffc0000000000 RCX: ffff888112f9d100
RDX: 0000000000000000 RSI: ffffea0004951500 RDI: ffff88811281b380
RBP: ffffc900014d7150 R08: ffffffff81a47588 R09: fffff9400092a2a7
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900014d75c0
R13: ffffea0004951500 R14: ffffc900014d75d8 R15: 0000000000000000
FS:  00007f24625a86c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000124b26000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400