Oops: general protection fault, probably for non-canonical address 0xdffffc00000009c0: 0000 [#1] SMP KASAN PTI
KASAN: probably user-memory-access in range [0x0000000000004e00-0x0000000000004e07]
CPU: 0 UID: 0 PID: 20193 Comm: syz.5.6345 Tainted: G U I L syzkaller #0 PREEMPT(full)
Tainted: [U]=USER, [I]=FIRMWARE_WORKAROUND, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:mem_cgroup_lruvec include/linux/memcontrol.h:720 [inline]
RIP: 0010:lru_gen_test_recent+0xee/0x320 mm/workingset.c:275
Code: 48 6c b6 ff 48 85 db 0f 84 79 01 00 00 e8 3a 6c b6 ff 49 8d bd 00 4e 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e a3 01 00 00 4d 63 b5 00 4e 00
RSP: 0018:ffffc9000351f828 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88801c6a0000 RCX: ffffc9000351f72c
RDX: 00000000000009c0 RSI: ffffffff8207fea6 RDI: 0000000000004e00
RBP: ffffc9000351f8c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffff88802cc529b0 R12: ffffc9000351f8e0
R13: 0000000000000000 R14: ffffc9000351f8b0 R15: 0000000000000014
FS: 00007f246718e6c0(0000) GS:ffff8881248fc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f933d519060 CR3: 000000006f5ea000 CR4: 00000000003526f0
Call Trace:
<TASK>
lru_gen_refault mm/workingset.c:296 [inline]
workingset_refault+0x251/0xca0 mm/workingset.c:546
filemap_add_folio+0x23d/0x610 mm/filemap.c:981
do_read_cache_folio+0x23c/0x5c0 mm/filemap.c:4063
freader_get_folio+0x33a/0x930 lib/buildid.c:58
freader_fetch+0xbd/0x740 lib/buildid.c:101
__build_id_parse.isra.0+0xdd/0x6c0 lib/buildid.c:289
do_procmap_query+0xb0e/0x1080 fs/proc/task_mmu.c:733
procfs_procmap_ioctl+0x9d/0xe0 fs/proc/task_mmu.c:813
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f246638f7c9
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:00007f246718e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f24665e6180 RCX: 00007f246638f7c9
RDX: 0000200000000080 RSI: 00000000c0686611 RDI: 0000000000000005
RBP: 00007f2466413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f24665e6218 R14: 00007f24665e6180 R15: 00007ffcea658688
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:mem_cgroup_lruvec include/linux/memcontrol.h:720 [inline]
RIP: 0010:lru_gen_test_recent+0xee/0x320 mm/workingset.c:275
Code: 48 6c b6 ff 48 85 db 0f 84 79 01 00 00 e8 3a 6c b6 ff 49 8d bd 00 4e 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e a3 01 00 00 4d 63 b5 00 4e 00
RSP: 0018:ffffc9000351f828 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88801c6a0000 RCX: ffffc9000351f72c
RDX: 00000000000009c0 RSI: ffffffff8207fea6 RDI: 0000000000004e00
RBP: ffffc9000351f8c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffff88802cc529b0 R12: ffffc9000351f8e0
R13: 0000000000000000 R14: ffffc9000351f8b0 R15: 0000000000000014
FS: 00007f246718e6c0(0000) GS:ffff8881248fc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f24665bb558 CR3: 000000006f5ea000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: 48 6c rex.W insb (%dx),%es:(%rdi)
2: b6 ff mov $0xff,%dh
4: 48 85 db test %rbx,%rbx
7: 0f 84 79 01 00 00 je 0x186
d: e8 3a 6c b6 ff call 0xffb66c4c
12: 49 8d bd 00 4e 00 00 lea 0x4e00(%r13),%rdi
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 74 08 je 0x3a
32: 3c 03 cmp $0x3,%al
34: 0f 8e a3 01 00 00 jle 0x1dd
3a: 4d rex.WRB
3b: 63 .byte 0x63
3c: b5 00 mov $0x0,%ch
3e: 4e rex.WRX