BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 800000001c734067 P4D 800000001c734067 PUD 0 
Oops: Oops: 0010 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 12799 Comm: syz.5.1724 Not tainted 6.16.0-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000d79f998 EFLAGS: 00010293
RAX: ffffffff81f6b394 RBX: 1ffffd400028b640 RCX: ffff888056288000
RDX: 0000000000000000 RSI: ffffea000145b200 RDI: ffff888031589180
RBP: ffffc9000d79fa50 R08: ffffea000145b207 R09: 1ffffd400028b640
R10: dffffc0000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffea000145b208 R14: ffffea000145b200 R15: 1ffffd400028b641
FS:  00007fd56f8c96c0(0000) GS:ffff888125c57000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000004892c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 filemap_read_folio+0x114/0x380 mm/filemap.c:2412
 do_read_cache_folio+0x350/0x590 mm/filemap.c:3894
 freader_get_folio+0x3c4/0x830 lib/buildid.c:77
 freader_fetch+0xa3/0x5d0 lib/buildid.c:120
 __build_id_parse+0x133/0x7d0 lib/buildid.c:305
 do_procmap_query fs/proc/task_mmu.c:534 [inline]
 procfs_procmap_ioctl+0x7f0/0xce0 fs/proc/task_mmu.c:613
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd56e98ebe9
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:00007fd56f8c9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd56ebb5fa0 RCX: 00007fd56e98ebe9
RDX: 0000200000000180 RSI: 00000000c0686611 RDI: 000000000000000a
RBP: 00007fd56ea11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd56ebb6038 R14: 00007fd56ebb5fa0 R15: 00007ffd3f071fe8
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000d79f998 EFLAGS: 00010293
RAX: ffffffff81f6b394 RBX: 1ffffd400028b640 RCX: ffff888056288000
RDX: 0000000000000000 RSI: ffffea000145b200 RDI: ffff888031589180
RBP: ffffc9000d79fa50 R08: ffffea000145b207 R09: 1ffffd400028b640
R10: dffffc0000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffea000145b208 R14: ffffea000145b200 R15: 1ffffd400028b641
FS:  00007fd56f8c96c0(0000) GS:ffff888125c57000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000004892c000 CR4: 00000000003526f0