loop0: detected capacity change from 0 to 32768
BTRFS: device fsid 395ef67a-297e-477c-816d-cd80a5b93e5d devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5322)
BTRFS info (device loop0): first mount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d
BTRFS info (device loop0): using sha256 (sha256-lib) checksum algorithm
BTRFS warning (device loop0): space cache v1 is being deprecated and will be removed in a future release, please use -o space_cache=v2
BTRFS info (device loop0): rebuilding free space tree
BTRFS info (device loop0): disabling free space tree
BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1)
BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2)
BTRFS info (device loop0): enabling ssd optimizations
BTRFS info (device loop0): enabling disk space caching
BTRFS info (device loop0): force clearing of disk cache
BTRFS info (device loop0): enabling auto defrag
BTRFS info (device loop0): max_inline set to 0
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 0 P4D 0 
Oops: Oops: 0010 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5322 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000d38f958 EFLAGS: 00010287
RAX: ffffffff81fa8de4 RBX: 1ffffd4000297b90 RCX: 0000000000100000
RDX: ffffc9000e20a000 RSI: ffffea00014bdc80 RDI: ffff888040c4ea80
RBP: ffffc9000d38fa10 R08: ffffea00014bdc87 R09: 1ffffd4000297b90
R10: dffffc0000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffea00014bdc88 R14: ffffea00014bdc80 R15: 1ffffd4000297b91
FS:  00007f80a3a716c0(0000) GS:ffff88808d732000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000041aca000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 filemap_read_folio+0x117/0x380 mm/filemap.c:2444
 do_read_cache_folio+0x350/0x590 mm/filemap.c:4024
 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:733 [inline]
 procfs_procmap_ioctl+0x76f/0xce0 fs/proc/task_mmu.c:813
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f80a2b8efc9
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:00007f80a3a71038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f80a2de5fa0 RCX: 00007f80a2b8efc9
RDX: 0000200000000180 RSI: 00000000c0686611 RDI: 0000000000000005
RBP: 00007f80a2c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f80a2de6038 R14: 00007f80a2de5fa0 R15: 00007ffc0c97d788
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000d38f958 EFLAGS: 00010287
RAX: ffffffff81fa8de4 RBX: 1ffffd4000297b90 RCX: 0000000000100000
RDX: ffffc9000e20a000 RSI: ffffea00014bdc80 RDI: ffff888040c4ea80
RBP: ffffc9000d38fa10 R08: ffffea00014bdc87 R09: 1ffffd4000297b90
R10: dffffc0000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffea00014bdc88 R14: ffffea00014bdc80 R15: 1ffffd4000297b91
FS:  00007f80a3a716c0(0000) GS:ffff88808d732000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000041aca000 CR4: 0000000000352ef0