BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 114134067 P4D 114134067 PUD 12e10b067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 28668 Comm: syz.2.7593 Not tainted 6.1.112-syzkaller-00006-g96ad4e759ff4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc900009b6ff8 EFLAGS: 00010246
RAX: 1ffff92000136eb8 RBX: dffffc0000000000 RCX: 0000000000040000
RDX: ffffc90001aee000 RSI: ffffea0005238f00 RDI: ffff888136063b00
RBP: ffffc900009b7150 R08: ffffffff81a49148 R09: fffff94000a471e7
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900009b75c0
R13: ffffea0005238f00 R14: ffffc900009b75d8 R15: 0000000000000000
FS:  00007f46e6a4e6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000114137000 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:563
 ondemand_readahead+0x91a/0xee0 mm/readahead.c:699
 page_cache_sync_ra+0x3d6/0x450 mm/readahead.c:726
 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: 0033:0x7f46e5b7e719
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:00007f46e6a4e038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f46e5d35f80 RCX: 00007f46e5b7e719
RDX: 0000000000000019 RSI: 000000000060005f RDI: 0000000020000000
RBP: 00007f46e5bf1616 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f46e5d35f80 R15: 00007ffd3d7221d8
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc900009b6ff8 EFLAGS: 00010246
RAX: 1ffff92000136eb8 RBX: dffffc0000000000 RCX: 0000000000040000
RDX: ffffc90001aee000 RSI: ffffea0005238f00 RDI: ffff888136063b00
RBP: ffffc900009b7150 R08: ffffffff81a49148 R09: fffff94000a471e7
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900009b75c0
R13: ffffea0005238f00 R14: ffffc900009b75d8 R15: 0000000000000000
FS:  00007f46e6a4e6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000114137000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400